Consulta: subjectFacets:"Abundance"
Registros recuperados: 298
Data/hora: 06/06/2024 03:38:53

Caracterización de la estructura de la población y uso de hábitat del zorzal cola rufa (Catharus guttatus) y el Chipe gorra rufa (Basileuterus rufifrons) en el parque estatal sierra de Tepotzotlán, Estado de México.
Provedor de dados: 32
Autores: Saavedra Alpizar, Oscar.
La calidad del hábitat de muchas especies animales podría ser mejor evaluada mediante  características poblacionales diferentes a la abundancia, dado que ésta puede ser engañosa.  En este estudio se contrastó la proporción de sexos, la estructura de edades y algunos índices  de condición corporal, como indicadores de la calidad del hábitat de dos aves de sotobosque  comunes durante el invierno en las zonas montañosas del Valle de México: el zorzal cola rufa  (Catharus guttatus), una ave migratoria y estenotópica, y el chipe gorra rufa (Basileuterus  rufifrons), residente y generalista de hábitat. Se capturaron y anillaron aves mediante una  estrategia de esfuerzo constante con redes de niebla, de octubre de 2007 a abril de 2008, en  una parcela de 20 ha de...
Palavras-chave: Calidad del hábitat; Estructura de edades; Proporción de sexos; Condición corporal; Abundancia habitat quality; Age structure; Sex ratio; Corporal condition; Abundance.
Ano: 2012
URL: http://hdl.handle.net/10521/794

Caracterización de la estructura de la población y uso de hábitat del zorzal cola rufa (Catharus guttatus) y el Chipe gorra rufa (Basileuterus rufifrons) en el parque estatal sierra de Tepotzotlán, Estado de México.
Provedor de dados: 32
Autores: Saavedra Alpizar, Oscar.
La calidad del hábitat de muchas especies animales podría ser mejor evaluada mediante  características poblacionales diferentes a la abundancia, dado que ésta puede ser engañosa.  En este estudio se contrastó la proporción de sexos, la estructura de edades y algunos índices  de condición corporal, como indicadores de la calidad del hábitat de dos aves de sotobosque  comunes durante el invierno en las zonas montañosas del Valle de México: el zorzal cola rufa  (Catharus guttatus), una ave migratoria y estenotópica, y el chipe gorra rufa (Basileuterus  rufifrons), residente y generalista de hábitat. Se capturaron y anillaron aves mediante una  estrategia de esfuerzo constante con redes de niebla, de octubre de 2007 a abril de 2008, en  una parcela de 20 ha de...
Palavras-chave: Calidad del hábitat; Estructura de edades; Proporción de sexos; Condición corporal; Abundancia habitat quality; Age structure; Sex ratio; Corporal condition; Abundance.
Ano: 2012
URL: http://hdl.handle.net/10521/914

Caracterización de la estructura de la población y uso de hábitat del zorzal cola rufa (Catharus guttatus) y el Chipe gorra rufa (Basileuterus rufifrons) en el parque estatal sierra de Tepotzotlán, Estado de México.
Provedor de dados: 32
Autores: Saavedra Alpizar, Oscar.
La calidad del hábitat de muchas especies animales podría ser mejor evaluada mediante características poblacionales diferentes a la abundancia, dado que ésta puede ser engañosa. En este estudio se contrastó la proporción de sexos, la estructura de edades y algunos índices de condición corporal, como indicadores de la calidad del hábitat de dos aves de sotobosque comunes durante el invierno en las zonas montañosas del Valle de México: el zorzal cola rufa (Catharus guttatus), una ave migratoria y estenotópica, y el chipe gorra rufa (Basileuterus rufifrons), residente y generalista de hábitat. Se capturaron y anillaron aves mediante una estrategia de esfuerzo constante con redes de niebla, de octubre de 2007 a abril de 2008, en  una parcela de 20 ha de bosque...
Tipo: Tesis
Palavras-chave: Calidad del hábitat; Estructura de edades; Proporción de sexos; Condición corporal; Abundancia; Habitat quality; Age structure; Sex ratio; Corporal condition; Abundance.
Ano: 2009
URL: http://hdl.handle.net/10521/1177

Abundacia del Jaguar (Panthera onca) y de sus presas en el municipio de tomasopo, San Luis Potosí
Provedor de dados: 32
Autores: Ávila Najera, Dulce María.
Durante el 2007 y 2008 en el ecotono (bosque de encino y bosque tropical) ubicado en  el Ejido de San Nicolás de los Montes enclavado en la Huasteca Potosina se estudió la  abundancia y densidad del jaguar (Panthera onca) y la abundancia relativa (IAR) de seis de  sus presas potenciales, armadillo (Dasypus novemcinctus), coatí (Nasua narica), pecarí de  collar (Pecari tajacu), venado temazate (Mazama temama), venado cola blanca (Odocoileus  virginianus) y tuza real (Cuniculus paca). La abundancia del jaguar se estimó con base en  trampeo fotográfico, la densidad por medio del programa de cómputo CAPTURE. El IAR se  calculó con tres metodologías (transectos parcelas y trampas-cámara). Además, por medio de  encuestas se determinó el índice de importancia...
Tipo: Tesis
Palavras-chave: Abundancia; Jaguar; Presas; Valor cultural; Conocimiento; Abundance; Jaguar; Prey; Cultural value; Knowledge.
Ano: 2009
URL: http://hdl.handle.net/10521/1168

Abundancia del jaguar (Panthera onca) y de sus presas en el municipio de Tamasopo, San Luis Potosí.
Provedor de dados: 32
Autores: Ávila Nájera, Dulce María.
Durante el 2007 y 2008 en el ecotono (bosque de encino y bosque tropical) ubicado en el Ejido de San Nicolás de los Montes enclavado en la Huasteca potosina se estudió la abundancia y densidad del jaguar Panthera onca) y la abundancia relativa (IAR) de seis de sus presas potenciales, armadillo (Dasypus novemcinctus), coatí (Nasua Narica), pecarí de collar (Pecari tajacu), venado temazate (Mazama temama), venado cola blanca (Odocoileus virginianus) y tuza real (Cuniculus paca). La abundancia del jaguar se estimó con base en trampeo fotográfico, la densidad por medio del programa de cómputo CAPTURE. El IAR se calculó con tres metodologías (transectos parcelas y trampas-cámara). Además, por medio de encuestas se determinó el índice de importancia cultural...
Palavras-chave: Abundancia; Jaguar; Presas; Valor cultural; Conocimiento; Abundance; Prey; Cultural value; Knowledge; Maestría; Ganadería; Fauna silvestre.
Ano: 2009
URL: http://hdl.handle.net/10521/106

Patrones de actividad y densidad del ocelote (Leopardus pardalis) en la reserva de la biosfera "Sierra del Abra Tanchipa", San Luis Potosí, México.
Provedor de dados: 32
Autores: Martínez Hernández, Abraham.
México cuenta con escasos estudios sobre el ocelote (Leopardus pardalis) a pesar de ser una especie en peligro de extinción. En el Estado de San Luis Potosí, se ha confirmado la presencia de poblaciones residentes y probablemente se encuentran en situación de riesgo debido a las intensas modificaciones del hábitat. Por esta razón es necesario generar información para conocer el estado actual de la población y para implementar estrategias efectivas de manejo para la conservación de esta especie en la región. El objetivo del estudio fue conocer la abundancia, densidad y los patrones de actividad del ocelote en la Reserva de la Biosfera Sierra del Abra Tanchipa, empleando un método de captura–recaptura con el uso de cámaras–trampa. El estudio se realizó de...
Palavras-chave: Leopardus pardalis; Cámaras-trampa; Abundancia; Densidad; Actividad; Camera-traps; Abundance; Density; Activity; Ganadería; Maestría.
Ano: 2013
URL: http://hdl.handle.net/10521/1909

Fluctuación poblacional de Diaphorina citri Kuwayana en limón persa (Citrus latifolia Tanaka) en la sabana de Huimanguillo, Tabasco.
Provedor de dados: 32
Autores: García Garduza, Diógenes.
Diaphorina citri Kuwayama es el vector de la enfermedad Huanglongbing, la cual se encuentra actualmente en 14 de los 23 estados productores de cítricos en México. El estado de Tabasco, donde se cultivan 15, 406 ha de estos frutales, aún no es afectado por la enfermedad, por lo cual es importante tomar medidas para controlar las poblaciones del vector, cuya presencia en dicho estado fue detectada en 2005. El objetivo de este trabajo fue determinar la fluctuación poblacional de D. citri  y la relación que guarda su incidencia con la abundancia de brotes vegetativos, temperatura y precipitación en la zona citrícola de Tabasco. El trabajo se realizó mediante muestreos quincenales de septiembre de 2010 a agosto de 2011 en una plantación de limón persa (Citrus...
Palavras-chave: Diaphorina citri kuwayama; Huanglongbing; Fluctuación; Abundancia; Fluctuation; Abundance; Producción Agroalimentaria en el Trópico; Maestría.
Ano: 2012
URL: http://hdl.handle.net/10521/757

Abundancia del jaguar (Panthera onca) y de sus presas en el municipio de Tamasopo, San Luis Potosí.
Provedor de dados: 32
Autores: Avila Nájera, Dulce María.
Durante el 2007 y 2008 en el ecotono (bosque de encino y bosque tropical) ubicado en el Ejido de San Nicolás de los Montes enclavado en la Huasteca potosina se estudió la abundancia y densidad del jaguar Panthera onca) y la abundancia relativa (IAR) de seis de sus presas potenciales, armadillo (Dasypus novemcinctus), coatí (Nasua Narica), pecarí de collar (Pecari tajacu), venado temazate (Mazama temama), venado cola blanca (Odocoileus virginianus) y tuza real (Cuniculus paca). La abundancia del jaguar se estimó con base en trampeo fotográfico, la densidad por medio del programa de cómputo CAPTURE. El IAR se calculó con tres metodologías (transectos parcelas y trampas-cámara). Además, por medio de encuestas se determinó el índice de importancia cultural...
Palavras-chave: Abundancia; Jaguar; Presas; Valor cultural; Conocimiento; Abundance; Prey; Cultural value; Knowledge; Maestría; Ganadería; Fauna silvestre.
Ano: 2009
URL: http://hdl.handle.net/10521/106

Avifauna en bosques manejados de Pinus patula en la Mojonera, Zacualtipán, Hidalgo
Provedor de dados: 32
Autores: Chi Poot, Roger Antonio.
El presente trabajo se realizó en La Mojonera, Zacualtipán, Hidalgo, con la finalidad de determinar el efecto del manejo del bosque de Pinus patula sobre la riqueza de avifauna, durante la transición invierno-primavera 2004-2005. Se definieron tres condiciones del bosque de acuerdo a su historial de manejo. La Condición Uno (C1) pertenece a un bosque no intervenido por el proceso de corta (bosque natural); la Condición Dos (C2) estuvo constituida  por rodales mayores a 12 años; y la Condición Tres (C3) por rodales menores de 12 años de edad. Para el muestreo de la vegetación, se establecieron 21 parcelas de 400 m2 (20X20m). En cada parcela se etiquetaron todos los individuos de especies arbóreas con DAP≥2 cm. Se identificaron, se registró su DAP, altura,...
Tipo: Tesis
Palavras-chave: Manejo del bosque; Avifauna; Abundancia; Riqueza; Maestría; Forestal; Forest management; Avian communities; Abundance; Richness.
Ano: 2007
URL: http://hdl.handle.net/10521/1549

Modeling Distribution and Abundance of Antarctic Baleen Whales Using Ships of Opportunity
Provedor de dados: 7
Autores: Williams, Rob; Sea Mammal Research Unit; rmcw@st-andrews.ac.uk; Hedley, Sharon L.; University of St. Andrews; slc@st-andrews.ac.uk; Hammond, Philip S.; University of St. Andrews; psh2@st-andrews.ac.uk.
Information on animal abundance and distribution is at the cornerstone of many wildlife and conservation strategies.  However, these data can be difficult and costly to obtain for cetacean species.  The expense of sufficient ship time to conduct design-unbiased line transect surveys may be simply out of reach for researchers in many countries, which nonetheless grapple with problems of conservation of endangered species, by-catch of small cetaceans in commercial fisheries, and progression toward ecosystem-based fisheries management. Recently developed spatial modeling techniques show promise for estimating wildlife abundance using non-randomized surveys, but have yet to receive much field-testing in areas where designed surveys have also been conducted....
Tipo: Peer-Reviewed Reports
Palavras-chave: Abundance; Antarctic; Baleen whale; Cetacean; Distance sampling; Distribution; Line transect; Platform of opportunity; Spatial model.
Ano: 2006

Diversity of mycobiota in colonies of different species of leaf-cutting ants and sampling sites across Argentina
Provedor de dados: 67
Autores: Marfetan,Jorge A; Folgarait,Patricia J.
Attine ants are a monophyletic group comprising more than 230 species, distributed exclusively in the New World. All higher Attini ants depend on the cultivation of fungus gardens for food, and those gardens are continuously exposed to alien microorganisms. The present work describes, for the first time, the composition, relative frequency and the richness of the fungal species comprising the mycobiota from the garden of the most abundant Acromyrmex species from different regions of Argentina. We also compared, using a multivariate approach, the mycobiota composition with the purpose of testing two hypotheses: 1) whether mycobiota is defined by the ant species, or 2) whether mycobiota is determined by the geographical region. We found that each fungal...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abundance; Acromyrmex; Ascomycota; Fungal communities; Richness; Zygomycetes.
Ano: 2017
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1667-782X2017000400008

Introduced herbivores and the Allee effect in animal-pollinated plants
Provedor de dados: 67
Autores: Vázquez,Diego P.
Interspecific interactions can be modulated by the community context in which they occur. In this paper I focus on plant-pollinator interactions and their modulation by introduced herbivores through changes in plant population density. I first develop a mathematical model that relates the population density of an animal-pollinated plant species with pollinator visitation frequency, pollination, reproduction and per capita growth rate. This model allows me to investigate how several pollination-related parameters -including relative abundance of the focal plant species, pollinator specialization, pollination quantity and quality and pollen limitation of reproduction- influence the relationship between per capita growth rate and population density. I then...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abundance; Allee effect; Density dependence; Introduced herbivores; Mutualism; Plant reproduction; Pollination; Pollinator specialization and generalization; Population dynamics.
Ano: 2007
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1667-782X2007000100003

Seasonal abundance of the Neotropic Cormorant (Phalacrocorax brasilianus) at Lagoa dos Patos estuary, Southern Brazil
Provedor de dados: 68
Autores: Barquete,Viviane; Vooren,Carolus Maria; Bugoni,Leandro.
Censuses of the Neotropic Cormorant (Phalacrocorax brasilianus) were carried out at a power tower near the mouth of Lagoa dos Patos estuary, southern Brazil, from November 2001 to October 2002. At this major roosting site, a total of 309 counts over 47 days of census were performed to estimate monthly variation in the abundance of the Neotropic Cormorant. The highest abundance occurred in January (1390 birds), and the lowest in May (117 birds). The tower was a roosting site for cormorants at night, which arrived around 15:30 h onward, with numbers increasing near dusk. Birds preferentially used the lower levels of the tower (including the concrete base and levels 1 and 2) throughout the year and this preference could be partially due to strong winds in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abundance; Neotropic Cormorant; Phalacrocorax brasilianus; Roosting site; Seasonal variation.
Ano: 2008
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0073-34072008000100003

Acoustical estimation of the Antarctic krill swarms spatial distribution and biomass
Provedor de dados: 13
Autores: Tokarev, Yu. N.; Vasilenko, V. I.; Zhuk, V. F.; Sokolov, V. G.; Slipetsky, D. Ya.
The method of acoustic express-evaluation of the krill (Euphausia superba Dana) population spatial structure and determination of its accumulations biomass, with 80 kHz echosounding frequencies has been worked out during the 7-th Ukrainian Antarctic expedition. The method error does not exceed 10 %, which permits to recommend it for usage under the Antarctic krill fishery conditions. The principal possibility to acoustically express-evaluate chorological structure of the Antarctic krill population has been shown. Formation by krill of dense accumulations of different form, elongated for 6 miles, appeared to be an expressed feature of krill behaviour during observations. The school type in krill distribution was observed as well. Parallel to this the...
Tipo: Journal Contribution
Palavras-chave: Acoustic; Antarctic krill; Abundance; Biomass; Акустика; Антарктический криль; Распределение; Биомасса Acoustic data Abundance Biomass Krill fisheries Biomass http://aims.fao.org/aos/agrovoc/c_926.
Ano: 2005
URL: http://repository.ibss.org.ua/dspace/handle/99011/188

Annual dynamics of abundance, biomass and survival of meroplankton in Sevastopol Bay, Black Sea
Provedor de dados: 13
Autores: Pavlova, E. V.; Murina, V.  V.; Kemp, R. B.; Wilson, J. G.; Parchevsky, V. P.
The first comprehensive data on species composition, abundance, biomass and survival (living/dead ratio) of meroplankton in Sevastopol Bay (Black Sea) are presented. Marked differences were observed between the years 1998 and 1999, and these could be attributed to the hydrology and the eutrophication status of the different parts of the Bay. Shannon index and selected community parameters (number of species, biomass, numbers of individuals) indicated that South Bay was the worst affected part of the Bay with the greatest eutrophication impact on the meroplankton. The early larval stages of the barnacle Balanus improvisus and of the polychaete Polydora sp. were the most sensitive to presumed environmental stresses. It is suggested that the mortality of...
Tipo: Journal Contribution
Palavras-chave: Abundance; Biomass; Survival; Meroplankton; Environmental conditions; Sevastopol Bay; Black Sea; Численность; Биомасса; Выживаемость; Меропланктон; Среда; Севастопольская бухта; Черное море Abundance Biomass Survival Meroplankton Environmental conditions Biomass Survival Environmental conditions http://aims.fao.org/aos/agrovoc/c_926 http://aims.fao.org/aos/agrovoc/c_7538 http://aims.fao.org/aos/agrovoc/c_32980.
Ano: 2007
URL: http://repository.ibss.org.ua/dspace/handle/99011/301

Сравнение видового состава и количественного развития полихет обрастания и бентоса на примере Одесского порта
Provedor de dados: 13
Autores: Лосовская, Г. В.; Синегуб, И. А.; Рыбалко, А. А.
На большом фактическом материале (222 пробы обрастания, 123 пробы бентоса), собранном в  2001 г., изучены видовой состав, количественное развитие полихет и их экологическая структура в акватории Одесского порта. Зарегистрировано 19 видов полихет (17 видов в бентосе и 9 – в обрастании гидротехнических сооружений). Наиболее массовыми видами были Neanthes succinea, Polydora limicola и Heteromastus filiformis. Среди основных жизненных форм в обрастании и в бентосе доминировали интра-эпибионты. В обрастании преобладали полифаги, в бентосе – полифаги и детритофаги. Средние численность и биомасса полихет в обрастании были выше, чем в бентосе; на ракуше выше, чем на илах. На участке с относительно свободным водообменом средняя численность была в 4, а средняя...
Tipo: Journal Contribution
Palavras-chave: Полихеты; Обрастание; Бентос; Численность; Биомасса; Одесский порт; Polychaetes; Fouling; Benthos; Abundance; Biomass; Odessa port Biomass Fouling Benthos Abundance Benthos Biomass Fouling http://aims.fao.org/aos/agrovoc/c_878 http://aims.fao.org/aos/agrovoc/c_926 http://aims.fao.org/aos/agrovoc/c_25400.
Ano: 2004
URL: http://repository.ibss.org.ua/dspace/handle/99011/68

МАКРОВОДОРОСЛИ ПЕРИФИТОНА И БЕНТОСА ПРИБРЕЖЬЯ БУХТЫ ЛАСПИ (КРЫМ, ЧЁРНОЕ МОРЕ)
Provedor de dados: 13
Autores: Евстигнеева, И. К.; Танковская, И. Н.
В сравнительно-динамическом аспекте изучены таксономическая структура и продукционные возможности альгоценозов разных жизненных форм на примере перифитона и бентоса бухты Ласпи (Крым, Чёрное море). http://biotex.ibss.org.ua/
Tipo: Journal Contribution
Palavras-chave: Макрофитобентос; Макрофитоперифитон; Таксономия; Встречаемость; Фито- масса; Бухта Ласпи; Чёрное море; Макрофітоперіфітон; Макрофітобентос; Таксономія; Зустрічаємость; Фітомаса; Бухта Ласпі; Чорне море; Macrophytobenthos; Macrophytoperiphyton; Taxonomy; Abundance; Phytomass; Laspi Bay; Black Sea.
Ano: 2010
URL: http://repository.ibss.org.ua/dspace/handle/99011/1872

Состояние зоопланктонного сообщества Севастопольской бухты после вселения гребневика Beroe ovata в Черное море (1999 – 2003 гг.)
Provedor de dados: 13
Autores: Губарева, Е. С.; Светличный, Л. С.; Романова, З. А.; Аболмасова, Г. И.; Аннинский, Б. Е.; Финенко, Г. А.; Бат, Л.; Кидейс, А.
С сентября 1999 г. по сентябрь 2003 г. на постоянной станции у выхода из Севастопольской бухты выполнены исследования сезонной динамики видового состава, численности и биомассы кормового и желетелого зоопланктона (Beroe ovata и Mnemiopsis leidyi). Сезонная динамика биомассы кормового зоопланктона Севастопольской бухты характеризовалась летне-осенним и зимним максимумами, достигающими 2.4 г/м2. Основной вклад в биомассу кормового зоопланктона вносил меропланктон и копеподы (42.84.0 и 32.03.4% среднегодовой биомассы, соответственно). После появления в Черном море хищного гребневика B. ovata среднегодовая биомасса M. leidyi в Севастопольской бухте снизилась в среднем в 3.5 раза по сравнению с 1995 г., сократилась продолжительность его воздействия на...
Tipo: Journal Contribution
Palavras-chave: Черное море; Севастопольская бухта; Зоопланктон; Численность; Биомасса; Многолетние изменения; The Black Sea; Sevastopol Bay; Zooplankton; Mnemiopsis leidyi; Beroe ovata; Abundance; Biomass; Long-term fluctuation Biomass Zooplankton Abundance Zooplankton Biomass http://aims.fao.org/aos/agrovoc/c_15490 http://aims.fao.org/aos/agrovoc/c_926.
Ano: 2004
URL: http://repository.ibss.org.ua/dspace/handle/99011/66

Поселение черноморской мидии на бетонной набережной Севастопольской бухты (Чёрное море)
Provedor de dados: 13
Autores: Соловьева, О. В.
Впервые исследовано поселение мидий на набережной Севастопольской бухты в районе между мысами Николаевским и Хрустальным. Получены данные о численности, биомассе, размерном распределении и фильтрационной активности данного вида в исследуемом районе в теплое и холодное время года.
Tipo: Journal Contribution
Palavras-chave: Мидия; Биомасса; Размерный состав; Численность; Севастопольская бухта; Чёрное море; Mussel; Biomass; Dimensional structure; Abundance; Sevastopol bay; Black Sea Abundance Biomass Mussel culture Biomass http://aims.fao.org/aos/agrovoc/c_926.
Ano: 2005
URL: http://repository.ibss.org.ua/dspace/handle/99011/237

Сезонная изменчивость количественного развития фитопланктона у Аргентинских островов (Антарктика).
Provedor de dados: 13
Autores: Кузьменко, Л. В.; Игнатьев, С. М.
Приводятся результаты исследования количественного развития фитопланктона для прибрежных вод Аргентинского архипелага. Материалы собраны в 7-й УАЭ (зимовка 2002 – 2003 гг.) и 10-й УАЭ (сезонные работы 2005 г.). Впервые получены сведения о сезонной динамике количественного развития, видовом разнообразии фитопланктона, выделены доминирующие виды, сроки их массовой вегетации и стадии сукцессии. В водах архипелага обнаружено 126 видов и разновидностей микроводорослей, 73% из которых – диатомовые, 16,6 % - динофитовые. Исследования, проведённые антарктической осенью 2005 г., дополнили список видов на 31 таксон. Наиболее высокие показатели обилия фитопланктона получены для весенне-летнего сезона, когда в октябре наблюдалось «цветение» воды, вызванное мелкими...
Tipo: Journal Contribution
Palavras-chave: Фитопланктон; Численность; Биомасса; Видовой состав; Аргентинские о-ва; Антарктика; Phytoplankton; Abundance; Biomass; Species composition; Argentine Islands; Antarctic; Фітопланктон; Чисельність; Біомаса; Видовий склад; Аргентинські о-ви.
Ano: 2007
URL: http://repository.ibss.org.ua/dspace/handle/99011/847

Распределение живого и мёртвого мезозоопланктона в прибосфорских районах Чёрного и Мраморного морей: солёностная толерантность Acartia clausi и A. tonsa.
Provedor de dados: 13
Autores: Губарева, Е. С.; Светличный, Л. С.; Ишинибилир, М.; Бельмонте, Г.
В прибосфорских районах Чёрного и Мраморного морей в октябре 2005 г. наблюдалось снижение биомассы кормового зоопланктона с 6102.6 до 2363.7 мг м-2 по направлению к Мраморному морю. Эта тенденция обусловлена резким изменением биомассы 4 видов копепод – Calanus euxinus, Pseudocalanus elongatus, Acartia clausi и A. tonsa. Одновременно с этим возрастала доля мёртвых организмов. Максимальная доля мёртвых особей A. clausi (88 %) отмечена в слое солёностного градиента Мраморного моря, что указывает на низкую галотолерантность этого вида. В лабораторных кратковременных экспериментах A. clausi, собранные у входа в пролив Босфор, погибали при повышении солёности с 18.9 до 29.4 ‰. Выживаемость A. clausi из удалённого от Босфора района Принцевых о-вов оказалась более...
Tipo: Journal Contribution
Palavras-chave: Мезозоопланктон; Биомасса; Численность; Выживаемость; Acartia clausi; Acartia tonsa; Солёностная толерантность; Скорость дыхания; Двигательная активность; Чёрное море; Мраморное море; Mesozooplankton; Biomass; Abundance; Survival; Acartia clausi; Acartia tonsa; Salinity tolerance; Respiratory rate; Locomotory activity; Black Sea; Marmara Sea; Біомаса; Чисельність; Виживаність; Солоністна толерантність; Швидкість дихання; Рухова активність; Чорне море; Мармурове море.
Ano: 2008
URL: http://repository.ibss.org.ua/dspace/handle/99011/829

Распределение живого и мёртвого мезозоопланктона в прибосфорских районах Чёрного и Мраморного морей: солёностная толерантность Acartia clausi и A. tonsa.
Provedor de dados: 13
Autores: Губарева, Е. С.; Светличный, Л. С.; Ишинибилир, М.; Бельмонте, Г.
В прибосфорских районах Чёрного и Мраморного морей в октябре 2005 г. наблюдалось снижение биомассы кормового зоопланктона с 6102.6 до 2363.7 мг м-2 по направлению к Мраморному морю. Эта тенденция обусловлена резким изменением биомассы 4 видов копепод – Calanus euxinus, Pseudocalanus elongatus, Acartia clausi и A. tonsa. Одновременно с этим возрастала доля мёртвых организмов. Максимальная доля мёртвых особей A. clausi (88 %) отмечена в слое солёностного градиента Мраморного моря, что указывает на низкую галотолерантность этого вида. В лабораторных кратковременных экспериментах A. clausi, собранные у входа в пролив Босфор, погибали при повышении солёности с 18.9 до 29.4 ‰. Выживаемость A. clausi из удалённого от Босфора района Принцевых о-вов оказалась более...
Tipo: Journal Contribution
Palavras-chave: Мезозоопланктон; Биомасса; Численность; Выживаемость; Acartia clausi; Acartia tonsa; Солёностная толерантность; Скорость дыхания; Двигательная активность; Чёрное море; Мраморное море; Mesozooplankton; Biomass; Abundance; Survival; Acartia clausi; Acartia tonsa; Salinity tolerance; Respiratory rate; Locomotory activity; Black Sea; Marmara Sea; Біомаса; Чисельність; Виживаність; Солоністна толерантність; Швидкість дихання; Рухова активність; Чорне море; Мармурове море.
Ano: 2008
URL: http://repository.ibss.org.ua/dspace/handle/99011/829

Pareucalanus smithae sp. nov. (Copepoda: Eucalanidae), a new copepod species from the Arabian Sea.
Provedor de dados: 13
Autores: Prusova, I. Yu.
A new copepod species, Pareucalanus smithae sp. nov., is described from the Arabian Sea based upon features of morphological structure and integumental perforation pattern. Information on horizontal and vertical distribution of P. smithae in the Arabian Sea is given.
Tipo: Journal Contribution
Palavras-chave: Pareucalanus; Eucalanidae; Copepoda; Abundance; Distribution; Arabian Sea; Численность; Распределение; Аравийское море; Чисельність; Розподіл; Аравійське море.
Ano: 2007
URL: http://repository.ibss.org.ua/dspace/handle/99011/848

Экспериментальное изучение развития тионовых и денитрифицирующих бактерий в анаэробных и  аэробных условиях
Provedor de dados: 13
Autores: Бурдиян, Н. В.
Изучено изменение численности тионовых и денитрифицирующих бактерий, выделенных из прибрежных наносов Севастопольских бухт, в экспериментально созданных  аэробных и анаэробных условиях. Отмечено возрастание численности тиобактерий при росте в анаэробных условиях и интенсивное развитие денитрификаторов,  как в аэробных, так и анаэробных условиях.
Tipo: Journal Contribution
Palavras-chave: Abundance; Bacteria; Bacteria; Http://aims.fao.org/aos/agrovoc/c_765.
Ano: 2007
URL: http://repository.ibss.org.ua/dspace/handle/99011/579

Composition and diversity of benthic macroinvertebrates in a Brazilian Cerrado stream
Provedor de dados: 76
Autores: Pio,Jéssica F. G.; Santiago,Eunice de F. E.; Copatti,Carlos E.
ABSTRACT This study aimed to analyse the diversity and composition of benthic macroinvertebrate assemblages in the dry and rainy seasons in a Brazilian Cerrado stream, where it was hypothesized that the dry season has higher diversity and it differs in terms of organism composition in relation to the rainy season. Sampling was carried out in the dry (May and August/2016 and August/2017) and rainy seasons (November/2016 and February and November/2017). Individuals were identified at the family level and classified according to functional feeding group (FFG). There were 3,776 individuals, in which Chironomidae was the most abundant taxon with 2,226 organisms. The FFG with the highest number of individuals and species richness were collector-gatherer and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abundance; Chironomidae; Functional feeding group; Seasonal variations; Richness.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212020000100216

Diversity and population characteristics of terrestrial isopods (Crustacea, Oniscidea) across three forest environments in southern Brazil
Provedor de dados: 76
Autores: Bugs,Priscila da Silva; Araujo,Paula Beatriz; Mendonça Júnior,Milton de Souza; Ott,Ricardo.
Terrestrial isopods are important and dominant component of meso and macrodecomposer soil communities. The present study investigates the diversity and species composition of terrestrial isopods on three forests on the Serra Geral of the state of Rio Grande do Sul, Brazil. The area has two natural formations (Primary Woodland and Secondary Woodland) and one plantation of introduced Pinus. The pitfall traps operated from March 2001 to May 2002, with two summer periods and one winter. There were 14 sampling dates overall. Of the five species found: Alboscia silveirensis Araujo, 1999, Atlantoscia floridana (van Name, 1940), Benthana araucariana Araujo &amp;amp; Lopes, 2003 (Philoscidae), Balloniscus glaber Araujo &amp;amp; Zardo, 1995 (Balloniscidae) and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abundance; Reproduction; Pinus sp; Plantation; Atlantoscia floridana; Balloniscus glaber.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212014000300009

Comparative analysis of tidepool fish species composition on tropical coastal rocky reefs at State of Ceará, Brazil
Provedor de dados: 76
Autores: Cunha,Edna A.; Carvalho,Roberto A. A.; Monteiro-Neto,Cassiano; Moraes,Luiz Eduardo S.; Araújo,Maria Elisabeth.
This study compared tidepool fish assemblages within and among habitats at Iparana and Pecém beaches, State of Ceará, Northeast Brazil, using visual census techniques. A total of 8,914 fishes, representing 25 families and 43 species were recorded. The most abundant taxon was Sparisoma spp, followed by Haemulon parra (Desmarest, 1823), Acanthurus chirurgus (Bloch, 1787) and Abudefduf saxatilis (Linnaeus, 1758). Haemulidae was the most abundant family in number of individuals, followed by Scaridae, Acanthuridae and Pomacentridae. Within- and between- site differences in species assemblages probably reflected environmental discontinuities and more localized features, such as pool isolation episodes, or environmental complexity, both acting isolated or...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Visual census; Fish assemblages; Abundance; Biodiversity.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212008000300013

Bird community in an Araucaria forest fragment in relation to changes in the surrounding landscape in Southern Brazil
Provedor de dados: 76
Autores: Scherer-Neto,Pedro; Toledo,Maria Cecília B.
The dynamics of the bird community in a small forest fragment was evaluated along seven years in relation to changes in the surrounding landscape. The study area is an Araucaria forest fragment in Southern Brazil (state of Paraná). The sampling period covered the years 1988 through 1994 and the mark-release-recapture method was utilized. The landscape analysis was based on Landsat TM images, and changes in exotic tree plantations, native forest, open areas (agriculture, pasture, bare soil, and abandoned field), and "capoeira"(native vegetation &lt; 2 m) were quantified. The relationship between landscape changes and changes in abundance diversity of forest birds, open-area birds, forest-edge birds, and bamboo specialists was evaluated. Richness estimates...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Richness; Abundance; Diversity; Long-term assessment; State of Paraná.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212012000400007

Diversity, composition and phenology of araneid orb-weavers (Araneae, Araneidae) associated with riparian forests in southern Brazil
Provedor de dados: 76
Autores: Rodrigues,Everton N. L.; Mendonça Jr.,Milton de S.; Rodrigues,Patrícia E. S.; Ott,Ricardo.
The Araneidae is a speciose family including web-spinning spiders that are very abundant in various terrestrial ecosystems. Several studies demonstrate that changes in vegetation surrounding rivers, streams and brooks affect the associated araneofauna. The aim of this research was to compare differences found in diversity (abundance and richness), composition and phenology of Araneidae spiders sampled in different habitats in four riparian forest catchments in southern Brazil. Samples were taken from riparian forests in four rivers of Rio Grande do Sul State: Piratini, Camaquã, Sinos and Maquiné rivers, each in a different hydrographic basin. Samples were taken twice seasonally on each basin during two years, sampling the araneofauna of the tree-shrub...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Spiders; Habitats; Rio Grande do Sul; Abundance; Richness.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212015000100053

Fish assemblages in two sandy beaches in lower Purus river, Amazonas, Brazil
Provedor de dados: 76
Autores: Duarte,Cleber; Py-Daniel,Lúcia H. Rapp; Deus,Cláudia Pereira de.
Fish assemblages from two sandy beaches in the lower Purus river (Amazonas, Brazil) were compared. Four sampling groups were represented by: day and night samples in sandy beach inside the Reserva Biológica de Abufari (biological reserve) and day and night samples in the Reserva de Desenvolvimento Sustentável Piagaçu-Purus (sustainable development reserve). Samples were collected during low water levels (November) in 2007. The fish were sampled by means of seines with mesh size of 5 mm between opposing knots, 11 m long and 6 m wide. A total of 112 fish species belonging to nine orders and 27 families was captured. The vast majority of the dominant forms consisted of small fishes (&lt; 100 mm SL) or juveniles. Samples collected in Abufari at night presented...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon fish; Nictemeral; Protected areas; Diversity; Abundance.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212010000400006

Ecology and natural history of Akodon lindberghi (Rodentia, Sigmodontinae) in southeastern Brazil
Provedor de dados: 76
Autores: Queirolo,Diego; Granzinolli,Marco A. M.
We studied the ecology and natural history of the globally threatened and poorly known Akodon lindberghi Hershkovitz, 1990 in Parque Nacional da Serra da Canastra (PNSC) and Juiz de Fora (JF), southeastern Brazil. From November 1998 to September 2001 a total of 131 individuals were captured in wire-cage live-traps and 52 by pitfalls traps. They were all marked and released at the site. The largest abundances were registered during the dry season, and most of the captures occurred in open habitats. The mean body mass of the two populations was significantly different (18.1 g at PNSC versus 13.1 g at JF; H = 46.2678, g.l.=2, p&lt;0.001). In PNSC, individuals were reproductively active from August to February, and juveniles were present from May to August....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Akodon lindberghi; Reproduction; Abundance; Body mass; Population structure.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212009000200011

Mudanças temporais na abundância e diversidade da fauna de peixes do infralitoral raso de uma praia, sul do Brasil
Provedor de dados: 76
Autores: Godefroid,Rodrigo S.; Spach,Henry L.; Santos,Cesar; MacLaren,Guilherme; Schwarz Jr.,Roberto.
Abundance and diversity of the fish fauna in the shallow infralittoral region of Atami Beach, Paraná, Brazil, were studied through monthly collections between July 1998 and June 1999. A total of 7553 fishes from 70 species and 26 families, mainly juvenile forms, was captured in the area. The mean captures in number of species, number of fish and biomass were larger from the end of spring to the middle of autumn; seasonal tendency in richness, diversity (number) and equitability indices were not observed. The largest mean dissimilarity in the composition of the ichthyofauna occurred between June and May in comparison to the period between July and October. The species that contributed most to this dissimilarity were Selene setapinnis (Mitchill, 1815),...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Demersal fish; Temporal variation; Abundance; Diversity; Brazil.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212004000100017

Mapping tuna occurrence under drifting fish aggregating devices from Fisher’s Echosounder buoys in Indian Ocean
Provedor de dados: 5
Autores: Baidai, Yannick; Dagorn, Laurent; Amande, Mj; Gaertner, Daniel; Capello, Manuela.
Echosounder buoys data obtained from instrumented drifting FADs represent an unprecedented source of information for assessing the spatio-temporal distribution of tropical tuna. Using machine learning algorithms, we transformed acoustic data collected from one of the main echosounder buoys models used by the French purse seine fleet (M3I) into presence/absence of tuna aggregations, enabling the measurement of the amount of inhabited FADs on a given spatiotemporal strata. This paper presents the spatial and temporal distribution of the proportion of drifting fish aggregating devices (DFADs) occupied by tuna aggregations relative to the total number of FADs in the Indian Ocean on a monthly basis, on a 5° grid for year 2016. The perspectives opened up by this...
Tipo: Text
Palavras-chave: Echosounders; Drifting fish aggregating devices (FAD); Tropical tunas; Abundance.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00592/70454/68576.pdf

International Bottom Trawl Survey (IBTS2019-Q1). French cruise report
Provedor de dados: 5
Autores: Lazard, Coline; Verin, Yves; Auber, Arnaud.
IBTS surveys (International Bottom Trawl Survey) are carried out within an international framework. Main countries bordering the North Sea participate to it according to the European Community regulations (EC N°1543/2000 and N° 1639/2001) which specify that countries from E.U. have to carry out surveys at sea in order to evaluate abundance and stocks distribution, independently of commercial fisheries data. The first target of the IBTS survey is to have a diagnosis on the main commercial fish stock and to calculate abundances index by age for these species. This survey started in the years 70’s and gradually standardised. Since the years 80’s, a common protocol is implemented and used by all participants. The same fishing gear and the same working methods...
Tipo: Text
Palavras-chave: North sea; GOV; Beam trawl; MIK; Abundance; Stock assessment.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00507/61899/65990.pdf

Observations sur la répartition et l’abondance du merlan Merlangius merlangus (Gadidae) en Manche orientale à partir des données des campagnes CGFS
Provedor de dados: 5
Autores: Carpentier, Andre.
Since 1988, the IFREMER Fisheries Resources Laboratory in Boulogne-sur-Mer is carrying out a pluriannual project in the Eastern Channel to estimate, directly and by age groups, the abundance and the recruitment of species of commercial interest. These data are obtained during an annual trawl survey (taking place in October) which gives indications about the fish populations distribution and allows to get biological informations needed for stock assessments. The present study aimed to analyse the distribution and the abundance of whiting (Merlangius merlangus). In the Channel, this species is one of the most exploited by the French small-scale fishery. The results showed that the whiting distribution was mainly restricted to shallow waters in October and...
Tipo: Text
Palavras-chave: Gadidae; Merlangius merlangus; Whiting; ANE; English channel; Abundance; Distribution.
Ano: 1998
URL: https://archimer.ifremer.fr/doc/00446/55786/62758.pdf

Short-scale temporal variability of physical, biological and biogeochemical processes in the NW Mediterranean Sea: an introduction
Provedor de dados: 5
Autores: Andersen, V.; Goutx, M.; Prieur, L.; Dolan, J. R.
In the framework of the PROOF-PECHE project (http://www.obs-vlfr.fr/proof/vt/op/ec/peche/pec.htm) a multi-disciplinary team performed experiments and collected samples during the DYNAPROC2 cruise aboard the RV Thalassa from September to October in 2004. The cruise provided data on the functioning of the pelagic food web by sampling over a month long period in the NW Mediterranean Sea at a fixed station subject to weak horizontal advection currents during a period of hydrological stability. This paper describes the background of the cruise and provides an overview of the results derived from the campaign which constitute the special section. The major objective of the cruise was to assess the relative importance and variability of the pathways of carbon in...
Tipo: Text
Palavras-chave: Spring bloom; Zooplankton community; Vertical distribution; Surface layer; Wind events; Bacterial communities; Food web; Transition; Oligotrophy; Abundance.
Ano: 2009
URL: https://archimer.ifremer.fr/doc/00092/20315/17954.pdf

Les pêcheries françaises de Méditerranée. Synthèse des connaissances
Provedor de dados: 5
Autores: Campillo, Albert.
This document presents information about the bottom nature and hydrodynamic features of the coast off French Mediterranean sea. The economic importance of fisheries concerning divers areas and different aspects of the fleet dynamics are also tachled. The background of this study is the knowledge of the principal marine species exploited in the area (60 species of fish, 5 of shellfish, 8 of mollusca, one of echinoderma and one of Octocorallia). The species index includes biological information and exploitation date. A reference list is proposed for each species.
Tipo: Text
Palavras-chave: SEM; Aménagement; Exploitation; Distribution; Abondance relative; Biologie; Flottille; Economie; Management; Exploitation; Distribution; Abundance; Biology relative; Fleet; Economy.
Ano: 1993
URL: https://archimer.ifremer.fr/doc/00393/50468/51203.pdf

Rapport de la campagne SOLPER 1 (26 août – 2 septembre 2005)
Provedor de dados: 5
Autores: Leaute, Jean-pierre.
To estimate the size and abundance distribution of juvenile sole (Solea solea) of nurseries in the Pertuis charentais (France) in 2005, a small beam trawl of 2 m wide and 8 mm stretched mesh was used over a hundred sampling points. The other fish catches have also been recorded.
Tipo: Text
Palavras-chave: Pertuis charentais; Chalut à perche; Nourricerie; Sole commune; Solea solea; Juvéniles; Taille; Abondance; Pertuis charentais (France); Beam trawl; Nursery; Juvenile sole; Solea solea; Length; Abundance.
Ano: 2006

Interannual variations in euphausiid life stage distribution in the Dumont d'Urville Sea from 2004 to 2008
Provedor de dados: 5
Autores: Vallet, Carole; Labat, Jean-philippe; Smith, Martina; Koubbi, Philippe.
Euphausiid larvae were caught by oblique tows of a double-framed bongo net at 118 stations along the coast of Terre Adelie during every summer from 2004-2008. Larvae of Euphausia crystallorophias Holt and Tattersall and Thysanoessa macrura G.O. Sars were observed in the study area every year in contrast to larvae of Euphausia superba which were absent during the entire period of sampling. Highest abundances of both species were observed during the summer of 2005 and the lowest in the summer of 2004. Larvae of E. crystallorophias dominated every year and comprised more than 80% of the total abundance of euphausiid larvae. Within species, the calyptopis stages especially calyptopis 1 of E. crystallorophias dominated compared to furcilia stages of T. macrura...
Tipo: Text
Palavras-chave: Euphausia crystallorophias; Thysanoessa macrura; Antarctic; Abundance; Spatial distribution; Environmental factors.
Ano: 2011
URL: https://archimer.ifremer.fr/doc/00227/33829/32464.pdf

Spatial variability of Chondrichthyes in the northern Mediterranean
Provedor de dados: 5
Autores: Follesa, Maria C.; Marongiu, Martina F.; Zupa, Walter; Bellodi, Andrea; Cau, Alessandro; Cannas, Rita; Colloca, Francesco; Djurovic, Mirko; Isajlovic, Igor; Jadaud, Angelique; Manfredi, Chiara; Mulas, Antonello; Peristeraki, Panagiota; Porcu, Cristina; Ramirez-amaro, Sergio; Salmeron Jimenez, Francisca; Serena, Fabrizio; Sion, Letizia; Thasitis, Ioannis; Cau, Angelo; Carbonara, Pierluigi.
Thanks to the availability of the MEDITS survey data, a standardized picture of the occurrence and abundance of demersal Chondrichthyes in the northern Mediterranean has been obtained. During the spring-summer period between 2012 and 2015, 41 Chondrichthyes, including 18 sharks (5 orders and 11 families). 22 batoids (3 orders and 4 families) and 1 chimaera, were detected from several geographical sub-areas (GSAs) established by the General Fisheries Commission for the Mediterranean. Batoids had a preferential distribution on the continental shelf (10-200 m depth). while shark species were more frequent on the slope (200-800 m depth). Only three species, the Carcharhiniformes Galeus melastomus and Scyliorhinus canicida and the Torpediniformes Torpedo...
Tipo: Text
Palavras-chave: Fish; Chondrichthyes; Bottom trawl surveys; Distribution; Abundance; Mediterranean.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00600/71220/69591.pdf

Campagnes expérimentales de chalutage en Manche orientale. Les campagnes C.G.F.S. 1997 &amp; 1998
Provedor de dados: 5
Autores: Carpentier, Andre; Coppin, Franck.
lfremer carries out a yearly bottom trawl survey named Channel Ground Fish Survey (CGFS) in order to collect essential biological data on major exploited fish species in the Eastern Channel. These data are also provided to feed the indispensable historie series to the yearly assessment of resources. This report presents results of the CGFS surveys for 1997 and 1998, under two aspects: a multispecific approach of the biological assemblages and integrating an interannual analysis, then a monospecific analysis of 7 species of commercial interest, as whiting, pout, cod, red gurnard, plaice, black bream, red mullet. OCR NOT CONTROLLED
Tipo: Text
Palavras-chave: Aspitrigla cuculus; Grondin rouge; Gadus morhua; Morue; Trisopterus luscus; Tacaud; Merlangius merlangus; Merlan; Multi espèces; Cartographie; Répartition; Abondance; Distribution; Manche orientale; Chalutage; Campagne; Plaice; Aspilngla cuculus; Red gurnard; Gadus morhua; Cod; Trisopterus luscus; Pout; Merlangius merlangus; Whiting; Multispecies; Cartography; Abundance; Distribution; Eastern Channel; Trawling; Survey.
Ano: 2000
URL: https://archimer.ifremer.fr/doc/2000/rapport-3606.pdf

International Bottom Trawl Survey (IBTS2021-Q1) - French cruise report.
Provedor de dados: 5
Autores: Lazard, Coline; Verin, Yves; Auber, Arnaud.
In 2021, the French NS-IBTS Q1 survey was conducted as part of the International Bottom Trawl Survey program carried out by main countries bordering the North Sea in order to assess abundance and stocks distribution, independently of commercial fisheries data. The first target of the NS-IBTS Q1 survey is to provide a diagnosis on the main commercial fish species by estimating their abundance per age. A standardized protocol is rigorously applied by all participants. The R/V Thalassa sampled the eastern part of the Channel and southern North Sea (until 56° N) from 19th January to 9th February 2021. During daily time, 56 hauls, lasting 30 minutes, have been carried out with a GOV bottom trawl. A total of 82 fish species have been collected, determined and...
Tipo: Text
Palavras-chave: North sea; GOV; Beam trawl; MIK; Abundance; Stock assessment.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00691/80333/83418.pdf

Seasonal Shifts in Diazotrophs Players: Patterns Observed Over a Two-Year Time Series in the New Caledonian Lagoon (Western Tropical South Pacific Ocean)
Provedor de dados: 5
Autores: Saulia, Emmrick; Benavides, Mar; Henke, Britt; Turk-kubo, Kendra; Cooperguard, Haley; Grosso, Olivier; Desnues, Anne; Rodier, Martine; Dupouy, Cécile; Riemann, Lasse; Bonnet, Sophie.
Coastal and open ocean regions of the Western Tropical South Pacific ocean have been identified as a hotspot of N2 fixation. However, the environmental factors driving the temporal variability of abundance, composition, and activity of diazotrophs are still poorly understood, especially during the winter season. To address this, we quantified N2 fixation rates and the abundance of seven diazotroph phylotypes (UCYN-A1 symbiosis, UCYN-B, UCYN-C, Trichodesmium, Het-1, Het-2, and Het-3) on a monthly basis during two full years (2012 to 2014) at four stations along a coast to open ocean transect in the New Caledonian lagoon. The total nifH gene concentration (sum of all nifH gene copies) clearly decreased from the barrier reef to the shore. Apart from UCYN-B,...
Tipo: Text
Palavras-chave: N-2 fixation; Diazotrophs; NifH; Abundance; New Caledonia.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00658/77027/78307.pdf

Les pêcheries françaises de Méditerranée. Synthèse des connaissances
Provedor de dados: 5
Autores: Campillo, Albert.
This document presents information about the bottom nature and hydrodynamic features of the coast off French Mediterranean sea. The economic importance of fisheries concerning divers areas and different aspects of the fleet dynamics are also tachled. The background of this study is the knowledge of the principal marine species exploited in the area (60 species of fish, 5 of shellfish, 8 of mollusca, one of echinoderma and one of Octocorallia). The species index includes biological information and exploitation date. A reference list is proposed for each species.
Tipo: Text
Palavras-chave: Économie; Flotille; Biologie; Abondance relative; Distribution; Exploitation; Amenagement; Economy; Fleet; Biology relative; Abundance; Distribution; Exploitation; Management.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/00393/50467/51202.pdf

Sampling for a bacteriological study of aquatic enrironments
Provedor de dados: 5
Autores: Troussellier, M; Baleux, B; Andre, P.
Using water samples from several observation levels of a brackish lagoon, statistical solutions are offered for the sampling optimisation of bacteria viable counts. The variability between plate count is studied by the mean of the Taylor's power law. The sampling strategy optimisation, including several sources of variability, is realized by hierarchical analysis of variance and the estimation of the sampling cost of each source. This optimisation procedure results in a great increase of the relative efficiency of the sampling design and allow to obtain significant differences between the bacterial concentrations. The effect of the reduction of the total sampling effort on the precision of these average concentrations pointed out the scientific and...
Tipo: Text
Palavras-chave: Bacteria; Abundance; Variance analysis; Microbiological analysis; Lagoons; Brackishwater environment; Bacterial counters; Biological sampling.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/1984/acte-941.pdf

The apparent disappearance of Loligo forbesi from the south of its range in the 1990s: Trends in Loligo spp. abundance in the northeast Atlantic and possible environmental influences
Provedor de dados: 5
Autores: Chen, C; Pierce, G; Wang, J; Robin, J; Poulard, Jean-charles; Pereira, J; Zuur, A; Boyle, P; Bailey, N; Beare, D; Jereb, P; Ragonese, S; Mannini, A; Orsi-relini, L.
Since the early 1990s, Loligoforbesi has apparently disappeared from much of the southern part of its former range, with catches off the Iberian Peninsula, for example, declining dramatically during the 1990s. The present paper assembles data from fishery and research cruise databases to examine the evidence for a shift in distribution, examine the relationship between abundance of this species and that of the partially sympatric Loligo vulgaris, and identify possible environmental correlates. Time-series of abundance of L. forbesi and L. vulgaris were assembled using fishery and survey data from Scotland, France, and Portugal. Based on availability of data and timing of the main fishery, data for autumn (October-December) were selected. Nine squid series...
Tipo: Text
Palavras-chave: North Atlantic Oscillation NAO; Dynamic factor analysis; Common trends; Abundance; Squid fishery; Loligo.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1539.pdf

Donnees sur les gasteropodes dulcicoles de l'ouest de la France: Mise en evidence de cinq groupes d'especes (ACP)
Provedor de dados: 5
Autores: Costil, F.
24 Species of Gastropoda, representing 3357 specimens, have been sampled in 57 varied ponds of Brittany (France). The most frequent species (at least in 10% of the samples) are considered according to their average abundance and dominance. The average specific richness of the ponds where the species have been collected is studied. In a second stage, the Gastropoda are analysed by means of a principal component analysis. The 1-2 plane correspond to 87% of the whole variance. This analysis associated with a cluster analysis led to the partition of 5 groups of species.
Tipo: Text
Palavras-chave: Gastropoda; Frequency analysis; Freshwater molluscs; Fresh water; Check lists; Inventories; Mathematical models; Ponds; Abundance.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/1991/acte-1713.pdf

Different surveys provide similar pictures of trends in a marine fish community but not of individual fish populations
Provedor de dados: 5
Autores: Trenkel, Verena; Pinnegar, John; Rochet, Marie-joelle; Rackham, Brian.
Choice of sampling method and survey period can have an important impact on the perception of the structure and dynamics of an ecological community. For the Celtic Sea fish assemblage we compared data obtained by three different trawl surveys: an autumn groundfish survey with a GOV trawl, and a spring and an autumn groundfish survey, both carried out with a Portuguese high-headline trawl. Time-series of abundance estimates were not consistent among surveys for all species and were generally very noisy. An analysis of variance components showed that the sampling method contributed more to the variance in abundance estimates compared to survey period, interannual variability, or even sampling variance. Overall community assessments based on indicators such...
Tipo: Text
Palavras-chave: Trawl; Survey; Species diversity; Size spectrum; Celtic Sea; Abundance.
Ano: 2004
URL: https://archimer.ifremer.fr/doc/2004/publication-899.pdf

Integration of discards in the roundnose grenadier stock assessment in ICES division Vb, subaera VI, VII
Provedor de dados: 5
Autores: Pawlowski, Lionel; Lorance, Pascal.
We present a series of exploratory stock assessments for roundnose grenadier (Coryphaenoides rupestris) from estimates of catch data based on information and assumption of discards and landing statistics. It is a common practice to consider landings data as a substitute of catch data to perform stock assessments. When a significant portion of the catch is discarded, this assumption is likely to be misleading as assessment methods will provide underestimated stock size.
Tipo: Text
Palavras-chave: Abundance; Deep fishing; Discards; Stock assessment; Roundnose grenadier; Abondance; Pêche profonde; Rejets; Évaluation de la ressource; Grenadier de roche.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/rapport-7440.pdf

Variation in abundance and size of the sardine Sardina pilchardus (Walbaum) in the eastern Adriatic
Provedor de dados: 5
Autores: Sinovcic, G; Alegriahernandez, V.
The catch per unit effort of the sardine, Sardina pilchardus (Walbaum, 1792), on the eastern Adriatic fishing grounds has greatly increased in recent years, notably during the past decade. We compared the relationship between annual mean total length and catch per unit effort (CPUE), as an index of population abundance. Decrease in fish size indicated the occurrence of a strong year class and led to an increase abundance in subsequent years. Long-term variations in catch per unit effort for 1963-1988 in relation to primary production, temperature, salinity and oxygen were analysed, with reference to the sardine, in the principal fishing grounds of the eastern part of the Adriatic. This correlation analysis confirmed the impact of these factors on...
Tipo: Text
Palavras-chave: Sardine; Adriatic; Abundance.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00093/20453/18125.pdf

Eastern Atlantic bluefin tuna: what we learn from historical time-series of trap catches
Provedor de dados: 5
Autores: Ravier, Christelle; Fromentin, Jean-marc.
More than one hundred long-term time-series of bluefin tuna catches from the ancestral Mediterranean and Atlantic trap fisheries are used to (1) estimate historical range of BFT yields in the Mediterranean and adjacent Atlantic and (2) investigate spatial and temporal patterns of fluctuations in trap catches. Mean historical catches were around 110 000 tunas/year (± 50 000), i.e. 15 000 tons/year (∈[7 000;25 000]). Fluctuations in trap catches are of large magnitude, periods of high abundance being up to seven times higher than those of low abundance. More interesting was the occurrence of 100-year-long periodic fluctuations as well as 20-year cycles. These medium- to long-term fluctuations, representing more than 50% of the total variability in the...
Tipo: Text
Palavras-chave: Thunnus thynnus; Time series analyses; Abundance; Population dynamics; Long-term changes; Trapfishing.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00194/30497/28906.pdf

Exploration des communautés virales thermophiles dans les écosystèmes chauds des Terres australes et antarctiques françaises
Provedor de dados: 5
Autores: Parikka, Kaarle Joonas.
Viruses thrive in all types of ecosystems where life is found. They represent the most abundant biological entity of our biosphere. Though several studies have been conducted on viral abundance and dynamics in mesophilic aquatic ecosystems, these aspects remain largely unexplored in extremophilic environments, such as hot springs. In this study, prokaryotic and associated viral communities of the French Southern and Antarctic Lands hot springs were explored. First, prokaryotic cells and Virus-like particles (VLP) were enumerated in several terrestrial and inshore hot springs. The results reveal an abundance of 105 - 106 particles/ml in both types of hot springs studied. The virus-to-prokaryote ratios (VPR) were generally low, confirming thus actual...
Tipo: Text
Palavras-chave: Bactérie; Archée; Induction virale; Lysogénie; Source chaude; Abondance; Bacteria; Archaea; Phage; Thermophile; Viral induction; Lysogeny; Hot spring; Abundance.
Ano: 2013
URL: https://archimer.ifremer.fr/doc/00609/72139/70891.pdf

Population dynamics and predatory impact of the alien jellyfish Aurelia solida (Cnidaria, Scyphozoa) in the Bizerte Lagoon (southwestern Mediterranean Sea)
Provedor de dados: 5
Autores: Gueroun, Sonai M; Molinero, Juan-carlos; Piraino, Stefano; Dali Yahia, Mohamed Nejib.
Understanding the life cycle strategies and predatory impact of alien jellyfish species is critical to mitigate the impact that these organisms may have on local populations, biodiversity, and ultimately on the functioning of food webs. In the Mediterranean Sea, little is known about the dynamics of alien jellyfish, despite this biodiversity hotspot being one of the most threatened areas by increasing numbers of alien jellyfish. Here, we investigated the population dynamics and predatory impact of a non-indigenous scyphomedusa, Aurelia solida Browne 1905, in the Bizerte Lagoon, Tunisia. The study was based on bimonthly surveys performed over two consecutive years, from November 2012 to August 2014. Field observations showed that the planktonic phase of A....
Tipo: Text
Palavras-chave: Scyphomedusae; Abundance; Predation; Mesozooplankton; SW Mediterranean.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00624/73577/72966.pdf

Analyse des campagnes SOLPER - 2005 à 2012
Provedor de dados: 5
Autores: Leaute, Jean-pierre; Aubert, Fabien; Lepareur, Fanny; Coupeau, Yann; Boiron-leroy, Anne.
A large number of studies on common sole have already been done for years by many research laboratories. This study sought to make a focus on a major nursery on the Atlantic coast, the Pertuis charentais, through the results of eight annual surveys (2005-2012) in late summer (SOLe PERtuis) targeting sole juveniles with a small beam trawl until subtidal zone (&lt;1.50 m). Some of the results obtained in this report confirm previous studies, such as, among others, that more than 80% YOY (G0) occupy muddy or sandy mud bottom at a depth less than 5 m, or that there is a relative correlation between large rainfall in the spring, river flows and abundance of G0 in nursery.   However in the Pertuis Breton this correlation is little expressed by an extension of...
Tipo: Text
Palavras-chave: Sole commune; Solea solea; Chalut à perche; Abondance; Pertuis charentais; Common sole; Solea solea; Beam trawl; Abundance; Pertuis charentais.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00422/53357/54196.pdf

International Bottom Trawl Survey (IBTS2020-Q1). French cruise report
Provedor de dados: 5
Autores: Lazard, Coline; Verin, Yves; Auber, Arnaud.
IBTS surveys (International Bottom Trawl Survey) are carried out within an international framework. Main countries bordering the North Sea participate to it according to the European Community regulations (EC N°1543/2000 and N° 1639/2001) which specify that countries from E.U. have to carry out surveys at sea in order to evaluate abundance and stocks distribution, independently of commercial fisheries data. The first target of the IBTS survey is to have a diagnosis on the main commercial fish stock and to calculate abundances index by age for these species. This survey started in the years 70’s and gradually standardised. Since the years 80’s, a common protocol is implemented and used by all participants. The same fishing gear and the same working methods...
Tipo: Text
Palavras-chave: North sea; GOV; Beam trawl; MIK; Abundance; Stock assessment.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00655/76740/77891.pdf

Estimation de la précision des campagnes acoustiques au Sénégal par la méthode géostatistique transitive à une dimension
Provedor de dados: 5
Autores: Samb, Birame; Petitgas, Pierre.
This study presents an application of the geostatistical one-dimensional (1D) transitive method for estimating the precision of acoustic pelagic abundance estimates in Senegal. In applying the method, the major problem encountered was how to take into account the temporal variability in the computation of the estimation variance. In acoustic surveys, echointegration is performed continuously along the ship's sailing track. For a survey design made of parallel transects, each transect can thus be considered as a sampling unit. By summing the density values along the transects to obtain biomass values per transect, the 2D estimation is simply reduced to a 1D estimation procedure. If the transects are equidistant, the geostatistical transitive method applied...
Tipo: Text
Palavras-chave: Céostatistique; Variance; Acoustique; Abondance; Geostatistics; Variance; Acoustics; Abundance.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00188/29883/28348.pdf

Ultralight aircraft surveys reveal marine turtle population increases along the west coast of Reunion Island
Provedor de dados: 5
Autores: Jean, Claire; Ciccione, Stephane; Ballorain, Katia; Georges, Jean-yves; Bourjea, Jerome.
Reunion Island in the south-west Indian Ocean once had significant nesting populations of marine turtles but they declined rapidly after human colonization. In 1996, after regular sightings of turtles offshore, an aerial survey programme was initiated to monitor the occurrence of marine turtles and their distribution along the west coast of the island Between 1998 and 2008, along a 30-km coastline transect between Saint Leu and Saint Paul, a total of 1,845 marine turtle sightings were recorded during 146 flights with an ultralight aircraft The mean number of turtle sightings per survey increased significantly between 1998 and 2008, and a variety of sizes were recorded throughout the year Marine turtles were found over coral reef zones and on the outer reef...
Tipo: Text
Palavras-chave: Abundance; Aerial survey; Conservation; Indian Ocean; Marine turtles; Reunion Island.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00005/11588/9280.pdf

Campagnes expérimentales de chalutage en mer du Nord et Manche orientale. Volume II. Les campagnes C.G.F.S. 1997 &amp; 1998
Provedor de dados: 5
Autores: Carpentier, André; Coppin, Franck.
Ifremer carries out a yearly bottom trawl survey named Channel Ground Fish Survey (CGFS) in order to collect essential biological data on major exploited fish species in the Eastern Channel. These data are also provided to feed the indispensable historic series to the yearly assessment of resources. This report presents results of the CGFS surveys for 1997 and 1998, under two aspects : a multispecific approach of the biological assemblages and integrating an interannual analysis, then a monospecific analysis of 7 species of commercial interest, as whiting, pout, cod, red gurnard, plaice, black bream, red mullet.
Tipo: Text
Palavras-chave: Campagne; Chalutage; Manche orientale; Distribution; Abondance; Répartition; Cartographie; Multiespèces; Merlan; Merlangius merlangus; Tacaud; Trisopterus luscus; Morue; Gadus morhua; Grondin rouge; Aspitrigla cuculus; Plie; Pleuronectes platessa; Griset; Spondyliosoma cantharus; Survey; Trawling; Eastern Channel; Distribution; Abundance; Cartography; Multi-species; Whiting; Merlangius merlangus; Pout; Trisopterus luscus; Cod; Gadus morhua; Red gurnard; Aspitrigla cuculus; Plaice; Pleuronectesplatessa; Black bream; Spondyliosoma cantharus; Red mullet.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00306/41762/40975.pdf

The new fisheries multibeam echosounder ME70: description and expected contribution to fisheries research
Provedor de dados: 5
Autores: Trenkel, Verena; Mazauric, Valerie; Berger, Laurent.
Recently, Simrad in collaboration with Ifremer developed a calibrated, multibeam, vertical echosounder (ME70) for fisheries research. We describe its capabilities and technical limitations. The ME70 has up to 45 beams with distinct frequencies in the range 70120 kHz, spanning at most 150 degrees. All beams are stabilized in vessel roll and pitch. It has reduced side-lobe levels, up to -70 dB (two-way) instead of the -2S dB (one-way) of conventional systems. We outline research areas for which the ME70 might provide new types of information and hence lead to novel insights. We illustrate the potential contributions with datasets collected in the English Channel and on the continental-shelf break of the Bay of Biscay. Finally, future research and...
Tipo: Text
Palavras-chave: Three dimensional; Behaviour; Acoustics; Abundance.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4117.pdf

Combining acoustic and CUFES data for the quality control of fish-stock survey estimates
Provedor de dados: 5
Autores: Petitgas, Pierre; Goarant, Anne; Masse, Jacques; Bourriau, Paul.
Petitgas, P., Goarant, A., Masse, J., and Bourriau, P. 2009. Combining acoustic and CUFES data for the quality control of fish-stock survey estimates. - ICES Journal of Marine Science, 66: 1384-1390.
Tipo: Text
Palavras-chave: CUFES; Biscay; Bias; Anchovy; Acoustics; Abundance.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6566.pdf

Distribution of picophytoplankton and nanophytoplankton along an anthropogenic eutrophication gradient in French Mediterranean coastal lagoons
Provedor de dados: 5
Autores: Bec, Beatrice; Collos, Yves; Souchu, Philippe; Vaquer, Andre; Lautier, Jacques; Fiandrino, Annie; Benau, Laurent; Orsoni, Valerie; Laugier, Thierry.
We explored the role of natural and anthropogenic environmental perturbations in shaping the community structure and dynamics of pico- and nanophytoplankton in coastal waters. The distribution patterns of phycoerythrin-rich picocyanobacteria (PE-CYAN) and phycocyanin-rich picocyanobacteria (PC-CYAN), autotrophic picoeukaryotes (PEUK) and nanophytoplankton (NANO) were examined over a period of 3 yr in 24 Mediterranean coastal lagoons displaying wide trophic gradients (from 0.2 to 630 mu g chlorophyll a [chl a] l(-1)) and salinity gradients (from fresh to marine waters). In summer, picoplanktonic abundances reached 3 x 10(8) cells l(-1), 5 x 10(9) cells l(-1) and 6 x 10(10) cells l(-1) for PE-CYAN, PC-CYAN and PEUK, respectively. PE-CYAN and PC-CYAN showed...
Tipo: Text
Palavras-chave: Autotrophic picoeukaryotes; Picocyanobacteria; Nanophytoplankton; Abundance; Biomass; Eutrophication; Mediterranean lagoons.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00031/14267/11547.pdf

Disentangling the effects of capture efficiency and population abundance on catch data using random effects models
Provedor de dados: 5
Autores: Trenkel, Verena; Skaug, Hans.
We propose a random effects model for disentangling population abundance and capture efficiency effects on bottom-trawl catches. The spatial distribution of individual fish is assumed random leading to a Poisson distribution for the number of individuals in the trawl path (no schooling). Capture efficiency, i.e. the proportion of individuals in the trawl path being retained by the gear, is modelled as a random variable. We propose model extensions that include the effects of body size on haul efficiency. We applied the models to several species from the Celtic Sea groundfish community based on small-scale repetitive hauls. The resulting abundance estimates allowed us to study population abundance ratios; the estimated capture efficiencies were comparable...
Tipo: Text
Palavras-chave: Trawl survey; Poisson distribution; Celtic Sea; Catchability; Abundance.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/publication-828.pdf

Rapport de la campagne SOLPER 2 (28 août – 2 septembre 2006)
Provedor de dados: 5
Autores: Leaute, Jean-pierre.
To estimate the size, age and abundance distribution of juvenile sole (Solea solea) of nurseries in the Pertuis charentais (France) in 2006, a small beam trawl of 2 m wide and 8 mm stretched mesh was used over a hundred sampling points. The other fish catches have also been recorded and water temperatures measured.
Tipo: Text
Palavras-chave: Pertuis charentais; Chalut à perche; Nourricerie; Sole commune; Solea solea; Juvéniles; Taille; Abondance; Âge; Pertuis charentais (France); Beam trawl; Nursery; Juvenile sole; Solea solea; Length; Abundance; Âge.
Ano: 2007

Resolution of biodiversity and assemblage structure in demersal fisheries surveys: the role of tow duration
Provedor de dados: 5
Autores: Moriarty, M.; Sell, A. F.; Trenkel, Verena; Lynam, C. P.; Burns, F.; Clarke, E. D.; Greenstreet, S. P. R.; Mcgonigle, C.
An experiment during a fisheries independent survey in the North Sea was conducted to test whether sampling effort could be reduced without a significant loss in data precision. To examine potential effects of reducing tow duration from the standard 30 min to a proposed 15 min estimates of species encounter rates, species richness, and estimates of abundance, biomass, and body size were analysed. Results show species richness estimates are lower in the short tow category. While biomass and abundance at length and body size are significantly affected by the change in tow duration, estimates of Large Fish Indicator, the Typical length and Mean-max length are not significantly affected by the regime change. The results presented here suggest that a reduction...
Tipo: Text
Palavras-chave: Abundance; Biomass; Body size; Fisheries independent survey; IBTS; International Bottom Trawl Survey; Linear mixed model; North Sea; Species diversity.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00439/55028/60477.pdf

Assemblage of chiropterans in a remnant of semideciduous seasonal forest in southern Brazil and latitudinal patterns of species diversity in the Atlantic Forest
Provedor de dados: 81
Autores: de S. Pires,Daniel Paulo; Marques,Rosane V; Cabral,Tiago C; de Lima,Camila S; Cademartori,Cristina V.
Observed and expected richness, capture success, diversity, dominance, evenness and the effect of latitude on the above variables at the regional level were evaluated with regard to the chiropteran fauna of a semideciduous seasonal forest remnant in the state of Rio Grande do Sul, southern Brazil. Sampling occurred between July 2008 and June 2010 using mist nets erected at ground level. So that chiropteran fauna could be described and compared to other studies in the Atlantic Rainforest throughout the 10°-30°S using multivariate regression. One hundred and sixteen specimens were captured, comprising 9 species and 3 families: Phyllostomidae, Vespertilionidae and Molossidae. Capture success was 0.0008 ind/m²h, with a diversity index (H&amp;#8217;) of 1.623;...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abundance; Atlantic Forest; Bats; Species richness.
Ano: 2014
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-93832014000200007

Variation in the nocturnal foraging distribution of and resource use by endangered Ryukyu flying foxes (Pteropus dasymallus) on Iriomotejima Island, Japan
Provedor de dados: 16
Autores: Lee, Y.-F.; Takaso, T.; Chiang, T.-Y.; Kuo, Y.-M.; Nakanishi, N.; Tzeng, H.-Y.; Yasuda, K.
The nocturnal distribution and resource use by Ryukyu flying foxes was studied along 28 transects, covering five types of habitats, on Iriomote Island, Japan, from early June to late September, 2005. Bats were mostly encountered solitarily (66.8%) or in pairs (16.8%), with a mean linear density of 2.5 ± 0.6 bats/km of transect/night. Across the island, however, bat densities were distributed non-randomly among transect-nights, not correlated with transect length, and showed a slightly clumped distribution (variance/mean = 3.3). Outskirt trails contributed higher values to the relative importance of bat abundance, but the highest mean abundances occurred mostly at village sites on the west coast, which on average devoted only a quarter of their land area to...
Tipo: Article / Letter to the editor
Palavras-chave: Abundance; Bats; Chiroptera; Diet; Figs; Frugivores; Habitat; 42.84.
Ano: 2009
URL: http://www.repository.naturalis.nl/record/311809

Termites as Bioindicators of Habitat Quality in the Caatinga, Brazil: Is There Agreement Between Structural Habitat Variables and the Sampled Assemblages?
Provedor de dados: 82
Autores: Alves,W de F; Mota,AS; Lima,RAA de; Bellezoni,R; Vasconcellos,A.
The composition of termite assemblages was analyzed in three caatinga sites of the Estação Ecológica do Seridó, located in the municipality of Serra Negra do Norte, in the state of Rio Grande do Norte, Brazil. These sites have been subjected to selective logging, and cleared for pasture and farming. A standardized sampling protocol for termite assemblages (30h/person/site) was conducted between September 2007 and February 2009. At each site we measured environmental variables, such as soil pH and organic matter, necromass stock, vegetation height, stem diameter at ankle height (DAH) and the largest and the smallest crown width. Ten species of termites, belonging to eight genera and three families, were found at the three experimental sites. Four feeding...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Isoptera; Semi-arid; Feeding group; Abundance; Environmental variable.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2011000100006

Termites in sugar cane in Northeast Brazil: ecological aspects and pest status
Provedor de dados: 82
Autores: Miranda,Carmélia S.; Vasconcellos,Alexandre; Bandeira,Adelmar G.
The spatial distribution, abundance, and feeding habits of termites in a sugar cane plantation in Northeast Brazil were studied, and based on these ecological parameters, the pest status of the species was evaluated. Four species were found: Amitermes nordestinus Mélo &amp;amp; Fontes, Cylindrotermes nordenskioeldi Holmgren, Nasutitermes coxipoensis (Holmgren) and Syntermes nanus Constantino, which we reported by the first time in association to sugar cane. The abundance and spatial distribution (vertical and horizontal) of the termites were influenced mainly by the plant root biomass and soil organic matter. C. nordenskioeldi is harmful to sugar cane, A. nordestinus is a potential pest, while N. coxipoensis and S. nanus are not potential pests. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Isoptera; Species richness; Abundance; Spatial distribution; Feeding habit.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2004000200015

Dung beetle communities: a neotropical-north temperate comparison
Provedor de dados: 82
Autores: Radtke,Meghan G; Fonseca,Cláudio R V da; Williamson,G Bruce.
Dung beetle communities have been compared across north temperate latitudes. Tropical dung beetle communities appear to be more diverse based on studies using different methodologies. Here, we present results from a standardized sampling protocol used to compare dung beetle communities across five neotropical forests in Brazil and Ecuador and two warm, north temperate forests in Mississippi and Louisiana. Species richness in the tropical forests was three to seven times higher than the temperate forests, as would be expected by studies of other taxa across tropical and temperate latitudes. Average body size in the temperate forests was larger than the tropical forests, as predicted by Bergmann's rule. Dung beetle abundance and volume per trap-day were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abundance; Diversity; Scarabaeidae; Temperate forest; Tropical forest.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2010000100004

Biomass and population structure of Constrictotermes cyphergaster (Silvestri) (Isoptera: termitidae) in the dry forest of caatinga, northeastern Brazil
Provedor de dados: 82
Autores: Vasconcellos,Alexandre; Araújo,Virgínia F.P.; Moura,Flávia M.S.; Bandeira,Adelmar G.
Biomass and population structure of Constrictotermes cyphergaster (Silvestri) were studied in an area of dry forest of caatinga in the State of Paraiba, northeastern Brazil. Twelve nests of different sizes were randomly collected, being six during the dry season (November 2004 and 2005) and six during the wet season (March 2004). Soldier and worker populations varied between 4880 and 118800 individuals per nest. The ratio between soldiers and workers did not significantly vary between seasons. Biomass (measured as fresh weight) of individuals varied between 13.9 and 408.8 g per nest, and soldiers and workers had significantly greater biomass during the wet season. The estimated density of nests of C. cyphergaster was 59.0 ± 22.53 active nests/ha....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Neotropical; Semi-arid; Nasutitermitinae; Colony; Abundance.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2007000500009

Physical habitat as predictor of fish trophic structure in Brazilian Atlantic rainforest streams
Provedor de dados: 83
Autores: Peressin,Alexandre; Casarim,Ruanny; Prado,Ivo Gavião; Cetra,Mauricio.
ABSTRACT Trophic structure of fish assemblages is one of the most sensitive indicators of changes in streams environments. Since it is crucial to understand the response of trophic groups to habitat alteration, our study aimed to address this research gap by assessing the influence of substrate composition, meso-habitat variability, and bank stability, on the richness, biomass, and number of individuals of carnivores, invertivores, omnivores, and herbivorous-detritivores. Using an electrofishing device, we sampled 13 Atlantic rainforest streams reaches in a degradation gradient, located in the upper Paranapanema river basin. Sample points were ranked using a physical habitat index. More pristine streams had high availability of twigs, trunks, rocks and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abundance; Environmental Assessment; Invertivores; Richness; Substrate.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252020000200205

Distribution, abundance and morphometry of Atlantoraja cyclophora (Regan, 1903) (Elasmobranchii: Rajidae) in southern Brazil, Southwestern Atlantic
Provedor de dados: 83
Autores: Oddone,María Cristina; Vooren,Carolus Maria.
A total of 459 individuals of Atlantoraja cyclophora were captured along the Rio Grande do Sul coast between latitudes 30º40'S and 34º30'S. Two surveys were performed, in the winter 2001 and in the summer/autumn 2002, using bottom-trawl between the depths of 100 and 600 m. This species occurred between 100 and 300 m deep, without significant differences in the frequency of occurrence and abundance (CPUE; kg/hour) between latitudes, depth and seasons. The sex ratio was not significantly different from 1:1 in all depths. In the study area, temperature ranged between 10.0 ºC and 17.6 ºC and salinity between 35.2 e 36.0 ppm. There was no correlation between CPUE and depth, temperature and salinity. Mean total length of females (53.2 cm) was significantly...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abundance; Distribution; Occurrence; Sex ratio; Morphometry.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252004000300005

Environmental influences on the spatial and temporal distribution of the puffer fish Sphoeroides greeleyi and Sphoeroides testudineus in a Brazilian subtropical estuary
Provedor de dados: 83
Autores: Fávaro,Luís Fernando; Oliveira,Elton Celton de; Ventura,Augusto de Oliveira Brunow; Verani,Nelsy Fenerich.
The spatial and temporal distribution of Sphoeroides greeleyi and Sphoeroides testudineus were established from collections (biological material and environmental data) conducted on a monthly basis from May 2000 to April 2001 in intertidal areas along the north-south axis of the estuarine complex of Paranaguá, Paraná State. In addition to characterizing a north-south spatial gradient, which fluctuates seasonally, the variation in the abiotic factors made possible the division of the estuary into three regions: north, central and south. Spatially, it was found that the number of individuals declines significantly for both species in the north-south direction of the estuary. Moreover, significant differences were found in the size of individuals across the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Tetraodontidae; Estuarine-residents; Closely related species; Abundance; Length structure.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000200020

Distribution and abundance of the Siberian rubythrot Luscinia calliope and the Siberian blue robin L. cyane in central and southeastern Hokkaido
Provedor de dados: 19
Autores: 藤巻, 裕蔵.
Palavras-chave: ノゴマ; コルリ; 北海道; 分布; 生息環境; Abundance; Distribution; Hokkaido; Siberian blue robin; Siberian rubythrot.
Ano: 1999
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/1275

Present status of the Latham's snipe Gallinago hardwickii on Sakhalin
Provedor de dados: 19
Autores: Nechaev, Vitalii A.; Fujimaki, Yuzo; 藤巻, 裕蔵; ネチャエフ, V.A.
Palavras-chave: Abundance; Distribution; Gallinago hardwickii; Latham's snipe; Sakhalin; 生息数; 分布; オオジシギ; サハリン.
Ano: 1998
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/1291

Distribution and abundance of the red-cheeked myna Sturnus philippensis and the grey starling S. cineraceus  in central and southeastern Hokkaido
Provedor de dados: 19
Autores: 藤巻, 裕蔵.
Palavras-chave: コムクドリ; ムクドリ; 北海道; 分布; 生息環境; Abundance; Grey starling; Distribution; Hokkaido; Red-cheeked myna.
Ano: 1998
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/1301

Las rayas del género Psammobatis de la plataforma Argentina: biología y ecología
Provedor de dados: 20
Autores: Mabragaña, E.
Las rayas (Rajidae)conforman un grupo de peces cartilaginosos de hábitos bentónicos, presentes en casi todos los mares del mundo. En la plataforma continental argentina (PCA)han sido reconocidas 23 especies de rayas pertenecientes a 7 géneros (Atlántico SO). El género Psammobatis Günther, objeto del presente estudio, es endémico de Sudamérica y está compuesto de 8 especies. Dentro de las rayas de la PCA es el que mayores problemas taxonómicos ha tenido debido a su morfología y diversidad. Las características de historia de vida hacen que este grupo sea muy vulnerable a la explotación pesquera. Hasta cerca de una década atrás, en nuestro país las rayas eran capturadas incidentalmente, siendo descartadas o destinadas a la harina de pescado, pero en los...
Tipo: Theses and Dissertations
Palavras-chave: Abundance; Taxonomy; Identification keys; Geographical distribution; Reproduction; Trophic relationships; Stomach content; Taxonomy; Geographical distribution; Reproduction; Http://aims.fao.org/aos/agrovoc/c_7631; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_6507.
Ano: 2007
URL: http://hdl.handle.net/1834/3130

Ichthyoplankton composition, distribution and abundance on the southern patagonian shelf and adjacent waters.
Provedor de dados: 20
Autores: Ehrlich, M.D.; Sánchez, R.P.; de Ciechomski, J.D.; Machinandiarena, L.; Pájaro, M.
This paper reviews the information on pelagic and demersal fish eggs and larvae, describing the distribution and seasonality of different species and their arrangement in icthyoplankton assemblages in the Southern patagonian waters. It also reports on 11 surveys conducted by INIDEP during 1992-1995. A total of 488 ichthyoplankton samples were analyzed. Fish eggs have been recognized in 47.  of all ichthyoplankton samples. They belong to three species: Coelorhynchus fasciatus, Macrourus whitsoni and Micromesistius australis. Fish larvae of 23 species and 17 families have been identified in 96.  of all samples analyzed. Spawning of most species begins in autumn, and progresses through winter, when the southern blue whiting and grenadier fish contribute to...
Tipo: Journal Contribution
Palavras-chave: Ichthyoplankton; Fish larvae; Fish eggs; Seasonal distribution; Abundance; Fish larvae; Http://aims.fao.org/aos/agrovoc/c_2924.
Ano: 1999
URL: http://hdl.handle.net/1834/2574

Distribución de los morfotipos gregaria y subrugosa de la langostilla Munida gregaria (Decapoda, Galatheidae) en el golfo San jorge en la campaña de verano AE-01/2011. Integración de resultados con las campañas 2009 y 2010
Provedor de dados: 20
Autores: De la Garza González, J.L.; Ravalli, C.; López Greco, L.
The objective of this work is to increase knowledge on the distribution and punctual density of both morphotypes of Munida gregaria in the San Jorge Gulf, Argentina. The data derived from the research cruise carried out on board of the FV Álvarez Entrena I in February 2011. Specimens of gregaria and subrugosa were caught in 37 and 73 of the 91 trawls performed, respectively. Out of the total of positive trawls, 17 were performed at depths lower than 55 m and the remaining 60 at deeper waters. The relative average abundance of both morphotypes increased significantly with regard to the two previous years (2009, 2010). M. gregaria subrugosa represented 66.4% and gregaria the remaining percentage. In the south sector of the gulf, where the highest punctual...
Tipo: Journal Contribution
Palavras-chave: Biogeography; Abundance; Size distribution; Fishery surveys.
Ano: 2013
URL: http://hdl.handle.net/1834/5487

Estudio de la condición nutricional de larvas de la población bonaerense de anchoíta (Engraulis anchoita) en relación con las características hidrográficas del área de crianza
Provedor de dados: 20
Autores: Díaz, M.V.; Pájaro, M.
The study of larvae nutritional condition allows to assess the physiologic state that reflects the environmental situation they were exposed to. It represents a useful instrument to determine favourable nursery areas, provides tools for the management of a population subject to fishing and furnishes information to establish appropriate closed areas and periods. The material analyzed derived from three cruises carried out to assess Argentine anchovy Northern stock during the 2003, 2004 and 2006 reproductive peak (SW Atlantic Ocean, Argentine Sea). The objective of this work was to study the nutritional status of Argentine anchovy first feeding larvae caught in the coastal and mid-shelf of the Río de la Plata River maritime front in relation to the...
Tipo: Journal Contribution
Palavras-chave: Fish larvae; Nursery grounds; Spawning populations; Morphometry; Length-weight relationships; Abundance.
Ano: 2013
URL: http://hdl.handle.net/1834/5496

Distribución y abundancia de los recursos demersales en la plataforma continental del Ecuador durante octubre de 1995
Provedor de dados: 20
Autores: Revelo, W.
The demersal phase (from 18th to November 01th, 1995) of cruise T95/10/04 DO, covered an area of 15632,6 km2 between 00º36'0”N-80º34'3”O and 03º22'8”S-80º49'5”O, of the Ecuadorian Continental Plataform, the depth range from 14 to 115 meters. 120 species were recorded, divided into 85 osseous fish species, three sharks, 11 ray, 18 crustaceans, two molluscan and one holothurid (sea cucumber). Total biomass was estimated as 95297,5 t; with 97,3% of this biomass distributed between 01º00'0”S and 03º23'S. The most abundant species were: barriga juma (Larimus spp) (11153 t), corvina (Cynoscion spp) (4523 t), gallineta (Prionotus spp) (55651 t), perela (Palabrax callaensis) (3774 t) and ravi junco (Centrithmus signifer) (2407 t).
Tipo: Journal Contribution
Palavras-chave: Fishery resources; Demersal fisheries; Continental shelves; Abundance; Geographical distribution; Demersal fisheries; Geographical distribution; Fishery resources; Continental shelves; Http://aims.fao.org/aos/agrovoc/c_2173; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_2942; Http://aims.fao.org/aos/agrovoc/c_32413.
Ano: 1996
URL: http://hdl.handle.net/1834/2970

Distribución, abundancia y estructura poblacional de los eufáusidos en el Estrecho Bransfield (Antártida), durante el verano austral 1998
Provedor de dados: 20
Autores: Castañeda, P.
Durante la VII Expedición Ecuatoriana a la Antártida, en el verano austral 1998, los días comprendidos entre el 24 al 27 de enero de 1998, se realizaron 14 arrastres planctónicos oblicuos en el Estrecho Bransfield. Las colectas fueron realizadas con una red bongo de 0.6 m de diámetro y 600μ de abertura de malla, efectuados a partir de los 600 metros de profundidad. De 1228 especímenes estimados, a 198 de estos se determinó la especie, sexo y longitud estándar. Se identificaron 2 géneros y 3 especies: Thysanoessa sp., (665 ind/1000 m3), T. macrura (296 ind/1000 m3) y Euphausia superba (267 ind/1000 m3). Se destaca la predominancia numérica de Thysanoessa sp., sobre E. superba. En el ámbito general los individuos adultos dominaron la mayoría de las capturas,...
Tipo: Journal Contribution
Palavras-chave: Distribution records; Abundance; Population structure; Zooplankton; Polar waters; Population structure; Zooplankton; Http://aims.fao.org/aos/agrovoc/c_6115; Http://aims.fao.org/aos/agrovoc/c_15490.
Ano: 1998
URL: http://hdl.handle.net/1834/3843

Estudios ecológicos en el Golfo San Jorge y adyacencias (Atlántico sudoccidental). Distribución, abundancia y variación estacional del fitoplancton en relación a factores físico-químicos y la dinámica hidrológica.
Provedor de dados: 20
Autores: Akselman, R.
This study was based on four seasonal cruises during 1984 and 1985.  It revealed a thermo-haline frontal system formed by the advection of the Coastal Water mass flowing in two branches, one running towards the coast and the other mid-shelf directed. The thermocline developed between late spring and autumn results in a low inorganic nutrient concentration in the upper layer. Nonetheless in winter, a vertical homogeneity and high nutrient concentration were observed.  Phytoplankton development presented a typical temperate-seas annual cycle. In winter, reduced populations were dominated by diatoms. The highest biomass concentration in the cycle coincided with the spring blooming, to which Thalassio sira anguste-lineata,Alexandrium tamarense, Heterocapsa...
Tipo: Theses and Dissertations
Palavras-chave: Phytoplankton; Abundance; Trophic relationships; Cysts; Seasonal variations; Seasonal thermocline; Plankton surveys; Environmental effects; Phytoplankton; Cysts; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_34811.
Ano: 1996
URL: http://hdl.handle.net/1834/1464

Condiciones del plancton en una estación fija: Puerto El Morro-Playas, Golfo de Guayaquil, 2000-2002
Provedor de dados: 20
Autores: Bonilla Coello, M.A.; Plúas, F.; Camposano, J.
En este estudio se examina la abundancia estructura poblacional y variación temporal del plancton, especialmente de copépodos en el Golfo de Guayaquil, a través de tres años de estudio, en condición no El Niño.
Tipo: Journal Contribution
Palavras-chave: Plankton; Phytoplankton; Abundance; Distribution; Zooplankton; Marine crustaceans; Fixed stations; Population structure; Diatoms; Fish eggs; Fish larvae; Population structure; Plankton; Phytoplankton; Distribution; Zooplankton; Diatoms; Fish larvae; Http://aims.fao.org/aos/agrovoc/c_6115; Http://aims.fao.org/aos/agrovoc/c_5950; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_35773; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_32657; Http://aims.fao.org/aos/agrovoc/c_2924.
Ano: 2002
URL: http://hdl.handle.net/1834/2315

Abundancia y distribución de la tonina Tursiops truncatus (Montagu, 1821) en dos áreas del archipiélago Sabana-Camagüey, Cuba.
Provedor de dados: 20
Autores: Pérez-Cao, H.
Entre los años 2000 - 2003 se evaluó la abundancia y distribución de delfines toninas en áreas del Archipiélago Sabana-Camagüey, específicamente en zonas adyacentes a Cayo Coco y en la zona norte de Matanzas. Se realizaron 12 salidas de campo, seis en cada área, recorriéndose un total de 2 007,8 millas náuticas, para un total de 322 h 79 min. Durante estas salidas se registraron cada 30 minutos variables oceanográficas a lo largo de transectos lineales y utilizando la técnica de fotoidentificación se cuantificaron los avistamientos de delfines, registrando el número de individuos, tamaño de grupo, la conducta y número de crías. Para el análisis se hizo una diferenciación por subzonas (5 subzonas), estaciones (lluvia y seca), y horario del día (mañana y...
Tipo: Theses and Dissertations
Palavras-chave: Abundance; Distribution; Marine mammals.
Ano: 2004
URL: http://hdl.handle.net/1834/4603

Reef associated molluscan fauna of the Santa Marta Area, Caribbean Coast of Colombia
Provedor de dados: 20
Autores: Díaz, J.M.; Escobar, L.A.; Velásquez, L.E.
Se registra un total de 263 especies de moluscos (201 encontradas vivas) colectadas entre 1982 y 1989 en siete localidades arrecifales de la región de Santa-Marta, Colombia. Los moluscos fueron ordenados de acuerdo a las zonas de arrecife en que fueron encontradas, a sus hábitos alimentarios y a su modo de vida. El dendrograma resultante del análisis de similaridad faunística entre las zonas muestra que existen tres tipos básicos de comunidades en el arrecife (asentadas respectivamente en zonas someras, zona de declive arrecifal y zona con coral muerto y arena), más una comunidad pobre en especies y restringida a la zona dominada por el coral Agaricia tenuifo/ia. Existen algunas diferencias entre las zonas arrecifales en cuanto a la distribución porcentual...
Tipo: Journal Contribution
Palavras-chave: Malacology; Habitat; Geographical distribution; Interspecific relationships; Feeding behaviour; Population structure; Abundance; Malacology; Geographical distribution; Feeding behaviour; Population structure; Http://aims.fao.org/aos/agrovoc/c_4528; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_10778; Http://aims.fao.org/aos/agrovoc/c_6115.
Ano: 1990
URL: http://hdl.handle.net/1834/3890

Etude de la dynamique des systèmes d’exploitations et de l’éco biologie de la reproduction, de trois Mugilidés : &lt;Mugil cephalus&gt; (Linnaeus, 1758),&lt; Liza aurata&gt; (Perugia, 1892) et&lt; Mugil capurrii&gt; (Risso, 1810), analyse de leurs stratégies d’occupations des secteurs littoraux mauritaniens et de leurs possibilités d’aménagement.
Provedor de dados: 20
Autores: Ould Mohamed Vall, M.
Résumé : En Mauritanie, un constat clair met en évidence une tendance de sur-exploitation « en série» des stocks à haute valeur, des Mugilidés; le mulet jaune premièrement, puis ensuite le mulet noir et le mulet doré (espèces pouvant être considérées de substitution). L’exploitation intensive du mulet jaune à partir de 1996 a conduit au ciblage du mulet noir à partir de 1998 et puis, plus récemment encore, celui du mulet doré en 2001. L’absence d’une gestion rationnelle risque de conduire, dans moins de sept ans à la quasi-disparition de ces ressources (logiquement renouvelables).  C’est dans ce contexte de baisses des rendements, auquel s’ajoute la dégradation des zones littorales par l’action anthropique sans cesse croissante, que ce travail a permis...
Tipo: Theses and Dissertations
Palavras-chave: Biology; Distribution; Ecological distribution; Exploitation; Abundance; Legislation; Reproduction; Stock identification; Zonal distribution; Distribution; Biology; Legislation; Reproduction.
Ano: 2004
URL: http://hdl.handle.net/1834/1226

Estimación preliminar de la mortalidad natural de la merluza de cola (Macruronus magellanicus) en la plataforma sur-patagónica (Argentina)
Provedor de dados: 20
Autores: Ehrhardt, N.M.; Prenski, L.B.
Long-tail hake, Macruronus magellanicus, is an important species in the Argentinean southern demersal species complex. Significant development of these fisheries since 1987 is indicative of the need to assess the hoki resource and for this purpose knowledge about some of the fundamental population parameters, such as natural mortality rate, is required. Knowledge on the natural mortality rate is an important element for the quantification of the resilience of the stock to fishery exploitatuib. In this study an algorithm for estimating natural mortality of hoki is developed which is based on information on abundance at age obtained from area swept methods and from age composition in the landings. As a result, natural mortality rates for ages 5 to 9 ranged...
Tipo: Journal Contribution
Palavras-chave: Demersal fisheries; Mortality; Abundance; Demersal fisheries; Mortality; Http://aims.fao.org/aos/agrovoc/c_2173; Http://aims.fao.org/aos/agrovoc/c_4945.
Ano: 1996
URL: http://hdl.handle.net/1834/1962

Diversidad, densidad y biomasa de la macrofauna componente de los fondos de pesca 'camaron-langostino', frente a Mar del Plata, Argentina (1998-1999)
Provedor de dados: 20
Autores: Scelzo, M.A.; Martínez Arca, J.; Lucero, N.M.
The seasonal variation of diversity, density and biomass of the main species of the bentho-demersal fauna present in the 'prawn-shrimp' fishing grounds in the coastal sector between Cabo Corrientes and Torreon del Monje, Mar del Plata (38 degree S-57 degree W), Argentina, was studied. The quali-quantitative information obtained allowed to know the fluctuations of the bentho-demersal components of the community. The study included the annual cycle between April 1998-April 1999. Monthly samples at different depths (4-10 m) and distance from the coast (500 and 1,000 m) were obtained in two stations using a bottom net. Sampling in each station lasted 15 minutes and covered 2,400 m super(2). Number of specimens and weight for each species were recorded....
Tipo: Journal Contribution
Palavras-chave: Zoobenthos; Fishing grounds; Biomass; Abundance; Littoral zone; Species diversity; By catch; Biomass; Zoobenthos; Fishing grounds; Species diversity; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_15487; Http://aims.fao.org/aos/agrovoc/c_2947; Http://aims.fao.org/aos/agrovoc/c_33954.
Ano: 2002
URL: http://hdl.handle.net/1834/1700

Parámetros reproductivos de la raya Dipturus chilensis en el atlántico sudoccidental (34ºS-48ºS)
Provedor de dados: 20
Autores: Colonello, J.H.; Cortés, F.
A total of 807 Dipturus chilensis specimens (448 males and 359 females) caught in research cruises performed by the National Institute for Fisheries Research and Development (INIDEP) during 2011 and 2012 were analyzed. The cruises were carried out between (34°S-48°S) and 50-313 m depth. Mean size at first maturity (TL50) was estimated at 780 mm and 908 mm TL for males and females, respectively, values that represented about 80% of the respective maximum total length observed. Besides, latitudinal differences in sexual maturity estimates were detected. The total number of 4-7 reproductive seasons and 42-52 follicles or individuals of maximum annual potential fecundity estimated in this paper allow to suggest that each female would produce less than 300 eggs...
Tipo: Journal Contribution
Palavras-chave: Morphometry; Sexual maturity; Fecundity; Fishery surveys; Abundance; Dipterus chilensis; Marine environment.
Ano: 2014
URL: http://hdl.handle.net/1834/5820

Composición, abundancia y distribución del ictioplancton alrededor de las Islas Malvinas, desde 1996 hasta 2003
Provedor de dados: 20
Autores: Schenone, N. F.; Navarro, C.
Se presenta la composicion, abundancia y distribucion del ictioplancton obtenido en la campana del BIP Dr. Eduardo L. Holmberg EH-04 04 03 realizada en octubre de 2003  Instituto Nacional de Investigacion y Desarrollo Pesquero INIDEP, Argentina). Se efectua una comparacion con datos obtenidos en otras campanas realizadas en la zona alrededor de las Islas Malvinas  Argentina, Atlantico SO , en primavera desde 1996 hasta 2003. Se describe la variacion de la extension de las areas de puestas y cria en los distintos anos. Se han identificado huevos de peces en el 42 por ciento de las muestras que pertenecen a Coelorynchus fasciatus, Micromesistius australis, Salilota australis y Sprattus fueguensis y larvas en el 75 porciento de las muestras, pertenecientes a...
Tipo: Theses and Dissertations
Palavras-chave: Abundance; Eggs; Fish larvae; Geographical distribution; Ichthyoplankton surveys; Identification keys.
Ano: 2004
URL: http://hdl.handle.net/1834/5783

Estudio de la interrelaciones tróficas de dos elasmobranquios del Mar Argentino, en relación con las variaciones espacio-temporales y ambientales. Squalus acanthias (Squalidae) y Raja flavirostris (=Dipturus chilensis) (Rajidae).
Provedor de dados: 20
Autores: Garcia de la Rosa, S.B.
As a general rule, sharks and rays play an important role in the energy exchanges among higher trophic levels of the marine food chain and some of them, with an important impact as piscivorous predators.  Squalus acanthias (Squalidae) and  Raja flavirostris (=Dipturus chilensis )(Rajidae), are two elasmobranchs with high apparition frequencies in the SW Atlantic, in the coastal and demersal fishing trawls, co-existing and predating on the principal stocks of bony fish there located, especially the Argentine hake (Merluccius hubbsi). Both species could be transformed into alternative fishing resources, even though they are not currently commercially developed as such. The knowledge on their biology, given in great detail, will provide information for a...
Tipo: Theses and Dissertations
Palavras-chave: Geographical distribution; Abundance; Size distribution; Feeding behaviour; Diets; Interspecific relationships; Predation; Food preferences; Shark fisheries; Geographical distribution; Feeding behaviour; Predation; Food preferences; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_10778; Http://aims.fao.org/aos/agrovoc/c_6162; Http://aims.fao.org/aos/agrovoc/c_3024.
Ano: 1998
URL: http://hdl.handle.net/1834/1487

Ecological distribution of the shrimp camarao serrinha Artemesia longinaris (Decapoda, Penaeidae) in Fortaleza bay, Ubatuba, Brazil, in relation to abiotic factors
Provedor de dados: 20
Autores: Fransozo, A.; Costa, R.C.; Castilho, A.L.; Mantelatto, F.L.
The spatial and temporal distribution of the shrimp Artemesia longinaris in Fortaleza Bay, northern coast of Sao Paulo State, Brazil, in relation to abiotic factors, was studied. Shrimp samples were obtained on a monthly basis from November 1988 through October 1989 at seven pre-delimited transects on board of a fishing vessel supplied with double otter trawl nets. Depth was recorded at the midpoint of each transect; water and sediment samples were taken to measure salinity, temperature, texture and organic matter content of sediment. The shrimps obtained in the trawls were sorted, identified and 100 g subsample at each transect was separated for measurements (carapace length). A total of 3,083 individuals were obtained. Shrimps were more abundant from...
Tipo: Journal Contribution
Palavras-chave: Abiotic factors; Ecological distribution; Shrimp fisheries; Fishery surveys; Abundance.
Ano: 2004
URL: http://hdl.handle.net/1834/1537

Contribution à l’étude de l’abondance et la distribution spatiale de certaines espèces de bivalves dans la zone estran de la lagune de Bougrara
Provedor de dados: 20
Autores: Derbali, Abdelkarim.
Le cardium Cerastoderma glaucum, la fausse clovisse Venerupsis aurea et Loripes lacteus sont des mollusques bivalves très abondants dans toute la zone littorale de la lagune de Bougrara. En vue de valoriser leur exploitation, l’évaluation de la biomasse, la détermination des structures démographiques globales de ces espèces ainsi que la cartographie de leurs abondances ont été entreprises. La méthode générale de l’évaluation des stocks des espèces de coquillage rencontrées dans la lagune se base sur la méthode directe de l’aire balayée. Le principe général de cette méthode repose sur la réalisation, dans un site donné, d’une série d’opérations de prospection et de prélèvement d’échantillons par quadra. D’une manière générale, pour aborder ce type...
Tipo: Theses and Dissertations
Palavras-chave: Shellfish; Geographical distribution; Abundance; Cerastoderma glaucum.
Ano: 2006
URL: http://hdl.handle.net/1834/5482

Evaluación hidroacústica del reclutamiento de anchoveta y sardina común entre la V y X Regiones, año 2003
Provedor de dados: 20
Autores: Saavedra, A.; Gálvez, P.; Barria, P.; Espejo, M.; Barbieri, M.A.; Núñez, S.; Ortiz, J.; Torres, P.; Véjar, F.; Molina, E.; Cerna, F.; López, A.A.; Bustos, L.
Se presentan los resultados de la evaluación acústica de la biomasa, abundancia y distribución espacial; oferta ambiental de alimento, y las condiciones oceanográficas físicas asociadas a la anchoveta (Engraulis ringens) y sardina común (Strangomera bentincki) en el período de reclutamiento de enero del año 2004 entre Topocalma (33º 50' S) y Punta Galera (40º 00' S).
Tipo: Report
Palavras-chave: Biomass; Abundance; Geographical distribution; Environmental conditions; Stock assessment; Echo surveys; Biomass; Geographical distribution; Stock assessment; Environmental conditions; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_32980.
Ano: 2004
URL: http://hdl.handle.net/1834/1738

Diagnóstico del recurso ostión del sur
Provedor de dados: 20
Autores: Cornejo, S.; Daza, E.; Guzmán, L.
El presente informe da cuenta de los resultados de las actividades realizadas para evaluar el estado de los bancos de ostión del sur (Chlamys vitrea), en sectores selectos de la región de Magallanes y Antártica Chilena (XII Región). Se incorporan también propuestas de administración y medidas para la recuperación  de las poblaciones del recurso. Se presenta la ubicación geográfica de los bancos identificados en cada fiordo y la superficie ocupada por ellos, además de las estructuras de tamaño, tallas medias, fracción de ejemplares sobre la talla mínima legal, relación longitud peso, pesos medios, estimaciones de densidad y abundancia, además de las estimaciones de las capturas totales permisibles (CTPs).
Tipo: Report
Palavras-chave: Marine molluscs; Resource management; Population characteristics; Population density; Abundance; Population structure; Population structure; Resource management; Population density; Http://aims.fao.org/aos/agrovoc/c_6115; Http://aims.fao.org/aos/agrovoc/c_6524; Http://aims.fao.org/aos/agrovoc/c_6112.
Ano: 2005
URL: http://hdl.handle.net/1834/1755

Distribución y abundancia del plancton estuarino en el Canal El Morro, Posorja (junio 2006)
Provedor de dados: 20
Autores: Torres, G.; Andrade, C.
El proyecto de "Gestión Ambiental de la Armada" en el área estuarina adyacente al reten Naval de Posorja, tuvo como objetivo realizar un muestreo de plancton y sus condiciones ambientales actuales, a fin de conservar los ecosistemas marino-costeros y su diversidad biológica para el beneficio de la población local, la ciencia y educación establecido en la estrategia de desarrollo sustentable adaptadas al Cambio Climático (Gaibor, et al., 2000).
Tipo: Journal Contribution
Palavras-chave: Phytoplankton; Zooplankton; Abundance; Estuaries; Geographical distribution; Phytoplankton; Zooplankton; Estuaries; Geographical distribution; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_2673; Http://aims.fao.org/aos/agrovoc/c_5083.
Ano: 2007
URL: http://hdl.handle.net/1834/2361

Ocurrencia de gallineta con joroba, Prionotus stephanophrys Lockington (Pisces: Triglidae) en aguas ecuatorianas, y aspectos de su comportamiento, biología y utilización
Provedor de dados: 20
Autores: Herdson, D.M.; Martínez, J.
The occurrence of gurnard Prionotus stephanophrys was studied in the course of a series of fisheries research cruises on the Ecuadorian continental shelf between 1980 and 1985. The species is common in coastal waters south of 1°S . Its abundance is very variable, possibly associated with sea temperatures. Normally densities are between 0.8 and 1.6 t.km-2. The standing stock varies between 13,000 and 150,000 t wich it is estimated can sustain catches of around 4,000 t pet year, and up to 40,000 t in times of great abundance. P. stephanophyrs is found in large shoals on the bottom during the day but a night moves up into mid-water to feed on euphausids. The fish caught had size range of 12 cm to 37 cm, but the majority were between 16 cm and 21 cm in total...
Tipo: Journal Contribution
Palavras-chave: Biomass; Abundance; Catch composition; Natural mortality; Biomass; Catch composition; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_1384.
Ano: 1985
URL: http://hdl.handle.net/1834/3157

Estimación de un índice de abundancia anual de gatuzo (Mustelus schmitti) a partir de datos de la flota comercial argentina. Período 1992-2008
Provedor de dados: 20
Autores: Pérez, M.; Massa, A.M.; Cordo, H.D.
Patagonian smoothhound (Mustelus schmitti) is one of the predominant cartilaginous fishes of the Argentine Sea (SW Atlantic Ocean). It is caught, mainly, in the coastal multispecific fishery with nearly other 30 bony and cartilaginous species. The group is known as ‘variado costero’. In this work the smoothhound abundance indices (CPUE) and standardized efforts for the 1992-2008 period in the area between 34~’S-42~’S were estimated. The General Lineal Model (GLM) and data derived from the argentine commercial fleet were used. Other aspects that could affect estimates and trends of the annual indices were also analyzed. Mean CPUE values estimated with the GLM, considered as annual standardized abundance indices, show an increasing trend as of 2000; the...
Tipo: Journal Contribution
Palavras-chave: Abundance; Catch/effort; Coastal fisheries; Statistical analysis; Mustelus schmitti; Marine environment.
Ano: 2011
URL: http://hdl.handle.net/1834/4881

Distribución y abundancia de las Ascidias de los fondos rocosos de la Bahía de Cuajiniquil, Costa Rica
Provedor de dados: 20
Autores: Nova-Bustos, Nidya; Hernández-Zanuy, Aida-C.; Viquez-Portuguez, Rigoberto.
Las ascidias de la costa del Pacífico centroamericano están muy poco estudiadas a pesar de que este grupo se destaca entre los miembros de la fauna bentónica de los fondos duros de la región. Teniendo en cuenta lo anterior, el objetivo del presente trabajo es conocer la distribución y abundancia de las ascidias en los fondos rocosos de la bahía de Cuajiniquil. Se ofrecen datos de la densidad (individuos por metro cuadrado de fondo) de las ascidias solitarias Rhopalaea birkelandi (Tokioka) y Ascidia ceratodes (Huntsman) a 5, 10 y 15 m de profundidad en tres transectos perpendiculares a la costa que se ubicaron en Isla David, Bajo Rojo y Bajo Viejón, sitios costeros de la bahía de Cuajiniquil, en el noroeste de Costa Rica. Otras tres especies de ascidias...
Tipo: Journal Contribution
Palavras-chave: Distribution; Abundance; Density; Marine invertebrates; Distribution; Density; Http://aims.fao.org/aos/agrovoc/c_35773; Http://aims.fao.org/aos/agrovoc/c_2186.
Ano: 2010
URL: http://hdl.handle.net/1834/3735

Variabilidad temporal del fitoplancton en áreas costeras del mar ecuatoriano y su interrelación con el evento La Niña 1999-2000, Ecuador
Provedor de dados: 20
Autores: Tapia, M.E.
La presente investigación tiene como objetivo conocer la variabilidad espacio temporal del fitoplancton y su interrelación con el evento La Niña 1999-2000 durante la época húmeda y seca considerando los parámetros ambientales: contajes celulares, abundancia relativa, en las estaciones fijas La Libertad y Manta.
Tipo: Journal Contribution
Palavras-chave: Temporal variations; Biological production; Phytoplankton; Upwelling; Abundance; El Nino phenomena; Cell counters; Biological production; Phytoplankton.
Ano: 2007
URL: http://hdl.handle.net/1834/2463

Sifonóforos (Cnidaria,Hydrozoa) de aguas superficiales alrededor de las Isla Santa Clara, durante septiembre  y noviembre del 2007
Provedor de dados: 20
Autores: Andrade Ruíz, C.E.
Se analizaron los sifonóforos colectados en las muestras superficiales de zooplancton alrededor de la Isla Santa Clara duarnte septiembre y noviembre del 2007, identificándose 15 especies de sifonóforos del suborden Calycophorae y una especie del suborden Cystonectae, todos ellos registrados por primera vez para aguas tropicales alrededor de la Isla Santa Clara. Las especies más abundantes en la fase de flujo fueron Muggiacea atlantica (15.3%), Chelophyes appendiculata (13.3%) y en reflujo fueron Chelophyes appendiculata con 22.6%, Lensia hotspur con 15.5%, Diphyes dispar (11%) y Lensia multicristata con 10.9%. Las especies restantes fueron escasas y su abundancia relativa fue inferior al 8%.
Tipo: Journal Contribution
Palavras-chave: Zooplankton; Abundance.
Ano: 2012
URL: http://hdl.handle.net/1834/4709

Macrofauna bentónica en la zona intermareal y submareal en Caleta Aeolian, Isla Baltra (Galápagos, Ecuador)
Provedor de dados: 20
Autores: Villamar, F.; Cruz, M.
Esta investigación tiene como propósito identificar y dar a conocer las especies de marco invertebrados bentónicos más comunes del área de la Caleta de Aeolian, Isla Baltra del Archipiélago de Galápagos, y conocer la actividad biológica de estos organismos marinos en la zona intermareal y submareal con la finalidad de determinar la composición, distribución y abundancia de cada uno de ellos y sus asociaciones existentes en la zona estudiada, como un marco referencial futuro que nos permita conocer los cambios para evaluar el impacto ambiental que puedan tener los hábitat de estos invertebrados marinos.
Tipo: Journal Contribution
Palavras-chave: Microorganisms; Abundance; Marine organisms; Community composition; Distribution; Marine invertebrates; Benthos; Intertidal environment; Distribution; Benthos; Intertidal environment; Microorganisms; Http://aims.fao.org/aos/agrovoc/c_35773; Http://aims.fao.org/aos/agrovoc/c_878; Http://aims.fao.org/aos/agrovoc/c_3923; Http://aims.fao.org/aos/agrovoc/c_4807.
Ano: 2007
URL: http://hdl.handle.net/1834/2405

Diversidad y abundancia de las esponjas de los bajos de Sancho Pardo, Archipiélago de los Colorados, Cuba
Provedor de dados: 20
Autores: Busutil, L.; Nuez-Hernández, D.; Pérez Angulo, A.
Se establecieron 12 estaciones de muestreo en perfiles batimétricos (5, 10 y 15 m) de cinco sitios ubicados en los Bajos de Sancho Pardo, Archipiélago de Los Colorados, región noroccidental de Cuba. Se empleó el marco cuadrado de 1 m de lado como unidad de muestreo, el cual se colocó aleatoriamente en 30 posiciones por estación. Fueron identificadas 50 especies de esponjas de la clase Demospongiae, distribuidas en 33 géneros, 10 órdenes y 22 familias. En las estaciones más someras predominó la especie Cliona aprica, mientras que en las más profundas lo hicieron Aplysina cauliformis, A. fistularis forma insularis e Ircinia felix. La riqueza de especies fue mayor en las estaciones más profundas. El índice de contaminación, calculado a partir de las...
Tipo: Journal Contribution
Palavras-chave: Sponges; Biodiversity; Abundance; Archipelagoes; Species diversity.
Ano: 2011
URL: http://hdl.handle.net/1834/4171

Florecimiento de la diatomea potencialmente tóxica Pseudo-nitzschia cf.  multistriata en aguas cubanas
Provedor de dados: 20
Autores: Moreira González, A.
Algunas especies de diatomeas del género  Pseudo-nitzschia producen toxinas que causan envenenamiento amnésico por  mariscos. En abril de 2009, se observó un florecimiento de diatomeas en un área semicerrada de la bahía de Cienfuegos,  Cuba, en el que se identificó a la especie potencialmente tóxica Pseudo-nitzschia cf. multistriata, sin embargo no se observaron  efectos nocivos para la fauna marina ni fueron reportados síndromes de toxicidad en humanos. El presente trabajo describe  la composición y la concentración del fitoplancton en el área del florecimiento con enfásis en la especie Pseudo-nitzschia cf.  multistriata.
Tipo: Journal Contribution
Palavras-chave: Abundance; Bays; Diatoms; Phytoplankton.
Ano: 2013
URL: http://hdl.handle.net/1834/4920

Evaluación de las asociaciones de peces arrecifales en el oeste del litoral de La Habana, zona noroccidental de Cuba
Provedor de dados: 20
Autores: García-Rodríguez, Alain; Lara-Lorenzo, Ariagna; González-Rodríguez, Naima.
Se realizó una evaluación rápida de las asociaciones de peces en el sector oeste del litoral norte de La Habana, el cual está sometido a un alto nivel de estrés ambiental. Se hicieron censos visuales mediante transeptos lineales en siete estaciones de dicha zona, en cada una de ellas se realizaron 6 réplicas de 50 m de largo por 2 m de ancho, siguiendo la metodología AGRRA. Los valores más bajos de densidad y biomasa se encontraron en las estaciones situadas al este del área de estudio (La Puntilla, calle 70 y calle 180), las cuales están más afectadas por la contaminación. La ictiofauna en todo el sector se caracterizó por una baja densidad, biomasa y talla de peces depredadores (pargos, meros, jureles, etc.) y herbívoros (fundamentalmente loros), al...
Tipo: Journal Contribution
Palavras-chave: Reef fish; Abundance; Marine pollution.
Ano: 2012
URL: http://hdl.handle.net/1834/4571

Composition, Abundance and Seasonality of Zooplankton in Mida Creek, Kenya
Provedor de dados: 20
Autores: Osore, M.; Mwaluma, J.; Kamau, J.; Wawiye, P.
Samples were collected monthly at four fixed stations in Mida creek from May 1996 to April 1997, in order to determine the species composition, abundance and diversity of phytoplankton and zooplankton collected with 20- and 332-mm mesh size plankton nets respectively. Sampling also included measurement of salinity and temperature. Peaks in phytoplankton abundance occurred in May and January, following the long rains in April–May and the short rains in November–December. Zooplankton densities followed the phytoplankton peaks with the main peak occurring in February after the major phytoplankton bloom. Similarly, smaller peaks occurred in May and March. Copepods dominated the zooplankton forming up to 60% of total species composition. High zooplankton...
Tipo: Journal Contribution
Palavras-chave: Zooplankton; Midacreek; Phytoplankton; Abundance; Kenya; Zooplankton.
Ano: 2003
URL: http://hdl.handle.net/1834/949

Producción estacional de Oithona nana (Copepoda: Cyclopoida) en aguas costeras de Argentina
Provedor de dados: 20
Autores: Temperoni, B.
Oithona nana (Copepoda: Cyclopoida)is a widely-distributed neritic species, which often comprises up to 90 percentage of the zooplankton in many coastal areas. This small copepod plays an important role as a dominant prey in the diet of Engraulis anchoita larvae, which is a main component of major ecological relevance in the pelagic food webs of the Argentine Sea (SW Atlantic Ocean). The objective of this study was to estimate, for the first time, the seasonal variation of O. nana secondary production in a temperate region: coastal waters off Buenos Aires province, Argentina, at the EPEA Station (Estación Permanente de Estudios Ambientales, (38°28' S-57°41' W). Zooplankton samples (N=14)were taken by oblique tows of a Minibongo net (mouth diameter: 0.18 m;...
Tipo: Theses and Dissertations
Palavras-chave: Secondary production; Coastal waters; Zooplankton; Seasonal variations; Abundance; Environmental conditions; Zooplankton; Coastal waters; Environmental conditions; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_25205; Http://aims.fao.org/aos/agrovoc/c_32980.
Ano: 2008
URL: http://hdl.handle.net/1834/3131

Evaluación de las comunidades de corales y peces de algunos arrecifes de la Isla La Tortuga y cayos adyacentes, Venezuela
Provedor de dados: 20
Autores: del Mónaco, C.; Narciso, S.; Alfonso, F.; Gimenez, E.; Bustillos, F.
La mayoría de los arrecifes coralinos de la isla La Tortuga se encuentran muy deteriorados con una baja abundancia de coral vivo y baja diversidad de especies coralinas. Los objetivos de este estudio fueron evaluar la estructura comunitaria de los arrecifes coralinos y la comunidad de peces de la isla La Tortuga y cayos adyacentes en las localidades Boca de Palo, Los Tortuguillos, Boca de Palo, Boca de Cangrejo y Los Chaguaramos. En cada localidad se seleccionaron 3 profundidades: 3, 6 y 10 m donde se evaluaron las coberturas coralinas de cada especie coralina en 12 cuadratas de 1 m2 por profundidad. Para evaluar la abundancia y diversidad de peces se utilizó el método AGGRA. Se observó una alta variabilidad espacial en la cobertura coralina entre las...
Tipo: Journal Contribution
Palavras-chave: Abundance; Reef fish; Coral reefs; Coral reefs; Http://aims.fao.org/aos/agrovoc/c_1880.
Ano: 2010
URL: http://hdl.handle.net/1834/3833

Los peces demersales del Banco Burdwood: distribución, abundancia de las especies y frecuencia de tallas (según datos de los B/I Walter Herwig y Shinkai Maru, campañas 1978-1979).
Provedor de dados: 20
Autores: Zunino, G.; Ichazo, M.M.
Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales.
Tipo: Theses and Dissertations
Palavras-chave: Demersal fisheries; Abundance; Environmental conditions; Demersal fisheries; Environmental conditions; Http://aims.fao.org/aos/agrovoc/c_2173; Http://aims.fao.org/aos/agrovoc/c_32980.
Ano: 1979
URL: http://hdl.handle.net/1834/3126

Kitefin shark Dalatia licha (Dalatiidae)fishery in the northeastern Atlantic and some recommendations for elasmobranchs explotation
Provedor de dados: 20
Autores: Perrotta, R.G.
In the Azores Islands (NE Atlantic), between 1986 and 1998, Dalatias licha was caught to obtain liver oil. A drastic abundance decline, probably attributed to a high level of exploitation, was observed. In Argentina elasmobranchs have undergone intensive fishing and, at present, catches are compromised. The history of the fishery in Azores should be taken as example and warning when implementing elasmobranchs fisheries management in Argentina.
Tipo: Journal Contribution
Palavras-chave: Abundance; Catch/effort; Fishery management; Shark fisheries; Fishery management; Http://aims.fao.org/aos/agrovoc/c_24026.
Ano: 2004
URL: http://hdl.handle.net/1834/1501

Análisis de la distribución y abundancia del ictioplancton y zooplancton acompañante en el Golfo San Matías en noviembre de 1992
Provedor de dados: 20
Autores: Mercado, L.; Pose, M.; Tesolin, G.; Villar, C.
Realizado en el INIDEP (Instituto Nacional de Investigación y Desarrrollo Pesquero- Mar del Plata, Argentina)
Tipo: Theses and Dissertations
Palavras-chave: Ichthyoplankton; Zooplankton; Fish larvae; Abundance; Environmental conditions; Zooplankton; Fish larvae; Environmental conditions; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_2924; Http://aims.fao.org/aos/agrovoc/c_32980.
Ano: 1993
URL: http://hdl.handle.net/1834/3550

Structure générale des peuplements d’annélides polychètes dans le secteur n-e du golfe de Tunis
Provedor de dados: 20
Autores: Zaabi, S.; Afli, A.
Cette étude a pour but de déterminer la structure générale des peuplements d’Annélides Polychètes le long de la côte N-E du golfe de Tunis. Au total, neuf stations ont été échantillonnées et les spécimens récoltés ont été identifiés, pour la plus part, jusqu’au niveau spécifique. Ensuite, des analyses de la classification ascendante hiérarchique ont été réalisées sur les abondances des différentes espèces aux stations étudiées, ce qui a permis de définir trois groupes de stations faunistiquement plus homogènes avec leurs espèces leaders. Parallèlement, les principaux paramètres synthétiques descriptifs de biodiversité (Richesse spécifique, Abondance, Indice de Shannon et Equitabilité) ont été calculés pour chaque groupe ainsi défini, et des analyses...
Tipo: Journal Contribution
Palavras-chave: Abundance; Population structure; Species diversity; Zoobenthos; Population structure; Species diversity; Zoobenthos; Http://aims.fao.org/aos/agrovoc/c_6115; Http://aims.fao.org/aos/agrovoc/c_33954; Http://aims.fao.org/aos/agrovoc/c_15487.
Ano: 2005
URL: http://hdl.handle.net/1834/3738

Crustáceos Decápodos y Estomatópodos asociados a la pesquería del langostino patagónico Pleoticus muelleri (Bate, 1888) en el golfo San Jorge, Argentina
Provedor de dados: 20
Autores: Roux, A.; Piñero, R.
The analysis of the data obtained in five research cruises carried out during the year 2000 allowed to describe the composition, structure and distribution of decapod and stomatopod crustaceans of the benthic communities of the San Jorge Gulf associated to Patagonian red shrimp fishing grounds. Results show that decapod and stomatopod crustaceans account for 71% of the total crustacean species registered in the benthic community. Munida subrugosa is the species that presents the highest values of relative abundance, frequency of occurrence and relative importance index. The feeding habits of Libidoclaea granaria, Lithodes santolla and Peltarion spinosulum and food availability in the San Jorge Gulf fishing grounds explain the high frequency of occurrence...
Tipo: Journal Contribution
Palavras-chave: Fishing grounds; Marine crustaceans; Ecological associations; Abundance; Shrimp fisheries; Fishing grounds; Ecological associations; Http://aims.fao.org/aos/agrovoc/c_2947; Http://aims.fao.org/aos/agrovoc/c_32845.
Ano: 2006
URL: http://hdl.handle.net/1834/2514

Los peces Gobiidae de los arrecifes del Caribe colombiano. III. El Género Coryphopterus
Provedor de dados: 20
Autores: Garzón-Ferreira, J.; Acero-P., A.
Se presenta información descriptiva y ecológica de nueve especies del género Coryphopterus (Pisces: Gobiidae) colectadas en los arrecifes, principalmente coralinos, del Caribe colombiano (incluyendo la Isla de Providencia). Se incluye además una-clave para identificar las especies. La más común en los muéstreos fue C. personatus (67%), seguida por C. eidolon (52%), C. dicrus (21%), C. glaucofraenum (27%); C. thrix (19%), C. tortugae (10%), C. lipernes (9%), C. hyalinus (4%) y C. alloides (3%). Se observaron diferencias regionales importantes en relación con su presencia y abundancia. Las poblaciones del Caribe continental colombiano tienden a ser más pigmentadas que las de regiones norteñas del Atlántico oeste trópica!, probablemente a causa de la...
Tipo: Journal Contribution
Palavras-chave: Reef fish; Ichthyology; Ecology; Identification keys; Abundance; Feeding behaviour; Ecology; Feeding behaviour; Ichthyology; Http://aims.fao.org/aos/agrovoc/c_2467; Http://aims.fao.org/aos/agrovoc/c_10778; Http://aims.fao.org/aos/agrovoc/c_3788.
Ano: 1990
URL: http://hdl.handle.net/1834/3885

Distribución, abundancia y estacionalidad de Liriope tetraphylla (Hidromedusa, Trachymedusae) en el Océano Atlántico Sudoccidental y su rol ecológico en el estuario del Río de la Plata
Provedor de dados: 20
Autores: Gaitán, E.N.
In zones of high productivity and/or in shallow waters (frontal or upwellings areas, bays and estuaries) the hydromedusae can reach exceptional abundances, denominated 'blooms'. Occasionally, these exceptional abundances are originated from some few individuals that constitute a 'seed population', which is retained in particular places while the environmental conditions are adverse. Liriope tetraphylla is a holoplanktonic and oceanic hydromedusae that often is found forming dense aggregations, which are developed mainly in the Buenos Aires coast during the summer in Argentinian waters (SW Atlantic). The temporal-space distribution and the abundance of L. Tetraphylla in the Subantarctic region were analyzed, with 1458 samples embracing the Argentinian and...
Tipo: Theses and Dissertations
Palavras-chave: Ecological aggregations; Geographical distribution; Abundance; Seasonal variations; Life history.
Ano: 2004
URL: http://hdl.handle.net/1834/5029

Características de algunas rayas de la región sudpatagónica
Provedor de dados: 20
Autores: Sánchez, M.F.; Mabragaña, E.
Data considered in this paper were obtained during a research cruise carried out on board of RV Dr. E.L. Holmberg from INIDEP (Instituto Nacional de Investigacion y Desarrollo Pesquero) during March-April 2000 in the area between 48°S and 55°S (S Patagonian) region, SW Atlantic. From 61 bottom trawls a total of 355 specimen belonging to 11 skate species were collected. This represents, in number, 1.8 of the total species biomass. All skate species were identified and some biological characteristics for each species analyzed. Abundance was estimated in tons and the distribution area of each species was determined. Total weight and morphometric data by sex were measured  total length, disc width and clasper length. Stomach content and macroscopical...
Tipo: Journal Contribution
Palavras-chave: Marine fish; Abundance; Stomach content; Food organisms; Diets; Feeding behaviour; Community composition; Feeding behaviour; Http://aims.fao.org/aos/agrovoc/c_10778.
Ano: 2002
URL: http://hdl.handle.net/1834/2426

Abundancia relativa y distribución de tallas de corvina rubia Micropogonias furnieri y pescadilla de red Cynoscion striatus en la Zona Comun de Pesca Argentino-Uruguaya y en el Rincón. Noviembre, 1994.
Provedor de dados: 20
Autores: Carozza, C.R.; Cotrina, C.P.
The study aims to discriminate juvenile and adult concentration areas of white croacker Micropogonias furnieri and striped weakfish Cynoscion striatus in two different areas: Argentine-Uruguayan Common Fishing Zone (AUCFZ) and El Rincón (Buenos Aires Prov., Argentina). The length structure and the relative abundance of these two species were analyzed with data from a research cruise carried out by R/V Dr.E.L.Holmberg during November 1994. Data of relative abundance in t/nm2 were considered to define distribution and concentration areas. 49 samples of white croaker and 41 striped weakfish from AUCFZ a, inside the area of Río de la Plata and in front of Montevideo coast, at depths lesser than 8 meters, while the adults were located in the northern coast of...
Tipo: Journal Contribution
Palavras-chave: Abundance; Fishery surveys; Size distribution; Coastal fisheries; Coastal fisheries; Http://aims.fao.org/aos/agrovoc/c_1696.
Ano: 1998
URL: http://hdl.handle.net/1834/2472

Evaluación del estado de explotación de la merluza de cola Macruronus magellanicus en la plataforma sur-argentina.
Provedor de dados: 20
Autores: Prenski, L.B.; Ehrhardt, N.M.; Legault, C.
Hoki, Macruronus magellanicus, is an important resource in the Argentinean multispecific southern demersal fishery. The species is distributed South of 46°S between the 50 and 200 meter isobaths. Thesouthern demersal fishery was almost nil prior to 1987, becoming more relevant toward the end of the 1980's. International fleets operating through several fishery agreement were those of the ex-Soviet Union,Bulgaria and Japan. Research on the abundance of hoki resources were initiated in the early 1970's; however, fishery research have been noticeably enhanced since 1992. In this study existing information on the Argentinean hoki fishery is integrated and an assessment of the status of exploitation of the species is carried out.As a result of the analyses, a...
Tipo: Journal Contribution
Palavras-chave: Fishery management; Mortality; Abundance; Stock assessment; Gadoid fisheries; Demersal fisheries; Adaptations; Fishery management; Stock assessment; Demersal fisheries; Mortality; Http://aims.fao.org/aos/agrovoc/c_24026; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_2173; Http://aims.fao.org/aos/agrovoc/c_4945.
Ano: 1997
URL: http://hdl.handle.net/1834/1924

Influencia de las interacciones con el factor Año en los índices anuales de abundancia obtenidos por modelos lineales generales utilizando datos de Captura por Unidad de Esfuerzo
Provedor de dados: 20
Autores: Hernandez, D.R.; Perrotta, R.G.
The problem in the definition of a relative annual abundance index using a General Linear Model is posed. The possible factors generating changes in the catch per unit effort (CPUE) are discussed and the parameterization of the model is analyzed, in particular the Sigma-restrictive parameterization. This report considers the problem caused by the presence of interactions of first order that include the factor Year in the model. It has been mathematically demonstrated that in the presence of these interactions, the index series is not proportional to the abundance annual mean of the resource. An approach of practical order to evaluate the possible effect of the interactions that include the factor Year in the index is considered using the percentage of...
Tipo: Journal Contribution
Palavras-chave: Stock assessment; Catch/effort; Mathematical models; Abundance; Fishing vessels; Stock assessment; Mathematical models; Fishing vessels; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_24199; Http://aims.fao.org/aos/agrovoc/c_2954.
Ano: 2006
URL: http://hdl.handle.net/1834/2511

Investigaciones de la avifauna marina en aguas continentales ecuatorianas con énfasis en su distribución, diversidad, abundancia y estado de conservación
Provedor de dados: 20
Autores: Agreda, A.; Torres, S.; Haase, B.; Samaniego, J.
Esta investigación es parte de un estudio de prospección sísmica dentro del proyecto denominado Investigación Geofísica de la Plataforma Continental del Ecuador. En esta investigación se realizó un levantamiento de información sobre diversidad, abundancia y estado poblacional y de conservación de las aves marinas en aguas continentales ecuatorianas y se identificó sitios sensibles y prioritarios para la conservación. Este estudio registró un total de 27 especies de aves marinas pertenecientes a 10 familias. La familia que registró el mayor número de especies fue Laridae (gaviotas y gaviotines) con ocho especies. La composición de especies registradas incluyó a formas marinas migratorias con 17 especies y residentes con nueve especies que se reproducen en...
Tipo: Journal Contribution
Palavras-chave: Marine birds; Geographical distribution; Species diversity; Abundance; Conservation.
Ano: 2010
URL: http://hdl.handle.net/1834/4227

Abundancia y distribucion de huevos y larvas de la merluza argentina (Merluccius hubbsi Marini, 1933) en un area de desove intensivo en el litoral norpatagonico.
Provedor de dados: 20
Autores: Bellizia, L.L.; Pan, J.; Venerus, L.A.
Argentine hake Merluccius hubbsi represents nowadays the main fishery resource of the Argentine Sea, in spite of the fact that the percentage of captures related to total fishery production has fallen down 30% in the last decade. The abundance and distribution of hake eggs and larvae in an intense spawning area in front of Isla Escondida (Chubut province), are analyzed. This phenomena was studied from a comparative-historical point of view allowing to apppreciate the evolution of a resource at present undergoing an overfishing pressure, capable of pushing it to collapse. Since 1973 maximum egg densities diminished and, if total egg production is considered a reliable index for recruitment prediction, no signs of overcoming stocks can be seen. On the other...
Tipo: Theses and Dissertations
Palavras-chave: Fish larvae; Fish eggs; Abundance; Spawning; Spawning; Fish larvae; Http://aims.fao.org/aos/agrovoc/c_14490; Http://aims.fao.org/aos/agrovoc/c_2924.
Ano: 2000
URL: http://hdl.handle.net/1834/1477

La ictiofauna de Bahía San Blas (Provincia de Buenos Aires) y su relación con la dinámica de las pesquerías deportiva y artesanal
Provedor de dados: 20
Autores: Llompart, F.M.
This study analyses the recreational and artisanal fisheries in San Blas Bay and their relationship with the dynamic of the temporal and spatial variability of the coastal fish assemblage. In addition some biological characteristics of two main target species are assessed. San Blas Bay is part of a natural reserve located in the southern part of Buenos Aires province, which has a great value in terms of tourism, ecology and productivity. According to different sampling methodologies used in this thesis 11 species of chondrychthes, 26 species of bony fish, and a hagfish (Class Petromizontida) were recorded, with a predominance of species belonging to Buenos Aires biogeographic province. To evaluate the fish assemblage seasonal pattern, every three months...
Tipo: Theses and Dissertations
Palavras-chave: Artisanal fishing; Sport fishing; Fishery management; Coastal fisheries; Marine fish; Ecological associations; Abundance; Catch/effort; Biogeography; Fishing effort; Mustelus schmitti; Odontesthes argentiniensis; Marine environment.
Ano: 2011
URL: http://hdl.handle.net/1834/4779

Diversidad, abundancia y amenazas de los octocorales de la isla Malpelo, Pacífico Oriental Tropical, Colombia
Provedor de dados: 20
Autores: Sánchez, Juan A.; Gómez, Carlos E.; Escobar, Dairo; Dueñas, Luisa F.
Durante expediciones a la isla Malpelo en 2009 y 2010, se exploró la diversidad, abundancia y estado de los octocorales. Se encontraron siete especies de octocorales: Leptogorgia alba, Pacifigorgia cf. lacerata, Pacifigorgia sp.1 y Pacifigorgia sp.2, Muricea cf. fruticosa, Muricea sp. y la especie invasora Carijoa riisei. Los octocorales forman densas agregaciones en paredes y escarpes rocosos, con su mayor abundancia entre 10 y 20 m, alcanzando densidades máximas de hasta 20 colonias m-2. La especie más abundante fue Pacifigorgia cf. lacerata, con más de un 60 % de predominio en número y una frecuencia de aparición del 100 % para todos los sitios visitados. Para la mayoría de los sitios se determinó la existencia de tres zonas bien definidas de acuerdo a...
Tipo: Journal Contribution
Palavras-chave: Reefs (coral); Abundance; Species diversity; Invasive species.
Ano: 2011
URL: http://hdl.handle.net/1834/4423

Distribución del fitoplancton en el Estrecho Bransfield, Bahía Chile y Paso Drake, durante el verano austral 1998 (Antártida)
Provedor de dados: 20
Autores: Tapia, M.E.; Torres Ch., G.
El principal objetivo fue de conocer la disponibilidad de la reserva alimenticia (fitoplancton), como un factor que puede influenciar la distribución y abundancia del krill antártico, registrados durante la VII Expedición Ecuatoriana a la Antártida en enero/1998 en el B/I ORION (INOCAR). La biomasa fitoplanctónica en el Estrecho Bransfield, registró altas concentraciones hacia el sur oeste del estrecho dominado principalmente por Cryptomonas spp. entre 1000.000 a 2200.000 cel/l, las menores concentraciones se registraron hacia las Islas Shetland del Sur entre 575.000 a 693.000 cel/l. compuestas principalmente por las diatomeas, Nitzschia delicatissima, N. longissima, Thalassiosira spp., y el Dinoflagelado gymnodinium spp., los cuales se presentaron...
Tipo: Journal Contribution
Palavras-chave: Distribution; Availability; Abundance; Diatoms; Phytoplankton; El Nino phenomena; Distribution; Phytoplankton; Diatoms.
Ano: 1998
URL: http://hdl.handle.net/1834/3852

Politique de gestion durable des ressources halieutique au Cap-Vert
Provedor de dados: 20
Autores: Ramos, V.
L'archipel du Cap-Vert est localisé entre 14 50° et 17 20° de lattitude nord et entre 22 40° 25 30° de longitude Ouest environ 333 ,3 miles maritimes de la côte ouest Africaine environ 600 km du Sénégal  et 1350 miles maritime de l'Etat du Brésil et 2750 miles sw de l'Angleterre.
Tipo: Journal Contribution
Palavras-chave: Climatic zones; Abundance; Marine crustaceans; Marine ecology; Zooplankton; Climatic zones; Zooplankton; Marine ecology; Http://aims.fao.org/aos/agrovoc/c_1669; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_4609.
Ano: 2003
URL: http://hdl.handle.net/1834/2616

Evaluación hidroacústica de merluza común, año 2004
Provedor de dados: 20
Autores: Lillo, S.; Olivares, J.; Braun, M.; Díaz, E.; Núñez, S.; Saavedra, A.; Saavedra, J.; Tascheri, R.
El presente informe contiene los resultados del proyecto FIP 2004-09, el que tuvo como objetivo central cuantificar el stock (estimar la distribución y abundancia) y determinar las características biológica, pesquera y oceanográfica relevantes del recurso. Metodológicamente, en primer lugar se realizó un crucero de prospección en el B/C Abate Molina, con el fin de recabar los datos acústicos, pesqueros y oceanográficos; en segundo lugar, el análisis de los datos para proceder con la evaluación del recurso. El crucero de prospección acústica que se llevó a cabo desde el 2 de julio al 12 de agosto de 2004 dentro del área de la pesquería, efectuándose 139 lances de pesca, 80 transectas acústicas y 92 estaciones oceanográficas.
Tipo: Report
Palavras-chave: Stock assessment; Geographical distribution; Abundance; Echo surveys; Stock assessment; Geographical distribution; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_5083.
Ano: 2005
URL: http://hdl.handle.net/1834/1843

La caballa (Scomber japonicus) y las condiciones ambientales en el area bonaerense de El Rincón (39°- 40°30' S), agosto 1996.
Provedor de dados: 20
Autores: Perrotta, R.G.; Madirolas, A.; Viñas, M.D.; Akselman, R.; Guerrero, R.A.; Sánchez, M.F.; López, F.; Castro Machado, F.; Macchi, G.J.
In August 1996 acoustic methods were employed to estimate mackerel (Scomber japonicus) abundance in the Buenos Aires, Argentina shelf area of "El Rincón" (4,287 mn2), located between 39°- 40° 30' S. Results showed a biomass estimate of 77,260 t. ASIMRAD EK-500 equipment operated with a 38 KHz split-beam transducer was used. Midwater fishing trawls were employed to identify echotraces and to collect mackerel samples.Trawls 4 and 5 were the most successful. Samples included only adult fish  (310-470 mm Lt and ages ranging 2-11). Length and weight growth parameters and mortality rates were estimated. Analysis of the stomach contents revealed that mackerel was feeding exclusively on zooplankters over 2 mmlength. The analysis of the characteristics (dimensions...
Tipo: Journal Contribution
Palavras-chave: Abundance; Biomass; Population structure; Zooplankton; Environmental conditions; Echo surveys; Biomass; Population structure; Zooplankton; Environmental conditions; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_6115; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_32980.
Ano: 1999
URL: http://hdl.handle.net/1834/2529

Estimación de índices de abundancia de pescadilla de red (Cynoscion guatucupa) a partir de datos de campañas de investigación empleando modelos lineales generales
Provedor de dados: 20
Autores: Ruarte, C.O; Rico, M.R.
Stripped weakfish is one of the ensemble of species known as “variado costero” most frequently landed. Considering that fact, determination of abundance indices is particularly relevant to apply assessment models and make recommendations to allow for a proper fishery management. The aim of this study was to obtain those indices of the species derived from research cruises carried out in the Argentine-Uruguayan Common Fishing Zone AUCFZ area (34°S-39°S) in the 1993-2006 period. In order to improve the traditional estimate accuracy modeling was used. To formulate the general linear models year, stratum, length, bottom salinity, depth factors and population data such as mean size and juveniles percentage were used. The percentages of variance explained in the...
Tipo: Journal Contribution
Palavras-chave: Abundance; Mathematical models; Stock assessment; Coastal fisheries; Cynoscion guatucupa; Marine environment.
Ano: 2014
URL: http://hdl.handle.net/1834/5821

Distribución del ictioplancton y zooplancton en la costa ecuatoriana septiembre 1995
Provedor de dados: 20
Autores: Ortega, D.; Elías, E.; Zurita, C.
Between the 6 and 13 of september of 1995, a study about the abundance, distribution of fish eggs and larvae in relation of the abundance and presence of the zooplankton in the Gulf of Guayaquil was carried out. The biggest fish larvae quantity was registered at station 16, 37 and 60 with values 500 and 1000 larvae.(10 m2)-1 which position at was long. 81~'00' - 82~'00'W; lat. 01~'00'S - 3~'04'S while the fish eggs concentration was 500 eggs.(10 m2)-1 at station 21. The smalles fish larvae quantity was registered between 6 and 73 larvae.(10 m2)-1, situated long. 81~'30' - 82~'00'W - lat. 02~'40' - 00~'59'S and 01~'00' south. At north of Gulf near of Puntilla of Santa Elena, Lat. 02~'00'S - Long. 81~'00'W, in the Center of the Ecuadorian coast, near of San...
Tipo: Journal Contribution
Palavras-chave: Ichthyoplankton; Zooplankton; Abundance; Geographical distribution; Zooplankton; Geographical distribution; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_5083.
Ano: 1996
URL: http://hdl.handle.net/1834/2966

Aspectos ecológicos del plancton en las riberas del humedal Isla Santay, Río Guayas durante los años 2000 y 2002
Provedor de dados: 20
Autores: Tapia, M.E.; Naranjo, Ch.
El objetivo del presente estudio es conocer la distribución cualitativa y cuantitativa de las especies del fitoplancton, zooplancton e ictioplancton y su relación con las condiciones ambientales durante el período en estudio.
Tipo: Journal Contribution
Palavras-chave: Species diversity; Plankton; Phytoplankton; Zooplankton; Ichthyoplankton; Biomass; Abundance; Biological production; Marine ecology; Temporal variations; Plankton; Phytoplankton; Zooplankton; Biomass; Biological production; Species diversity; Marine ecology; Http://aims.fao.org/aos/agrovoc/c_5950; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_36649; Http://aims.fao.org/aos/agrovoc/c_33954; Http://aims.fao.org/aos/agrovoc/c_4609.
Ano: 2007
URL: http://hdl.handle.net/1834/2371

El zooplancton del hábitat reproductivo de la población bonaerense de anchoíta (Engraulis anchoita), con especial énfasis en crustáceos
Provedor de dados: 20
Autores: Viñas, M.D.; Marrari, M.; Di Mauro, R.; Cepeda, G.D.; Padovani, L.N.
The information gathered in Argentine anchovy (Engraulis anchoita) Northern population assessment cruises allowed to perform studies on the zooplankton community of the Buenos Aires shelf since 1995. In this work the most relevant results as regards the taxonomy and size structure of the community, faunistic areas, and 'key' species in relation to the hydrographic conditions and frontal systems of the region are presented. Besides, the consequences those results might have on Argentine anchovy trophic ecology are analyzed. The taxonomic groups studied included copepods, cladocerans, appendicularians, chaetognaths, amphipods, and euphausiids. The multivariate analysis applied to quantitative data allowed to clearly distinguish three faunistic areas with...
Tipo: Journal Contribution
Palavras-chave: Zooplankton; Biogeography; Fauna; Fronts; Trophic relationships; Abundance; Pelagic fisheries.
Ano: 2013
URL: http://hdl.handle.net/1834/5497

Variación de la malacofauna bentónica intermareal y submareal de la Bahía de Santa Elena, Ecuador, entre el 2006 - 2007
Provedor de dados: 20
Autores: Cruz P., M.
Del análisis de 40 muestras de sedimentos submareales obtenidos a 10, 15, 20 y 25 m. de profundidad y de 30 muestras bentónicas del área rocosa de la zona intermareal, durante los años 2006 y 2007, se identificaron un total de 55 especies de moluscos en la Bahía de Santa Elena, de los cuales 28 especies son bivalvos, 24 gasterópodos, 2 escafópodos y un poliplacóforo. El área rocosa de la zona intermareal, durante el 2006, desde el límite de la bajamar hasta la zona media aproximadamente, predominó el bivalvo Brachidontes puntarenensis con el 64,2% y en el 2007 esta misma especie siguió predominando con el 86%, mientras que los gasterópodos en el 2006, desde la zona media hasta el límite de la pleamar predominó Littorina paytensis con el 45%, esta misma...
Tipo: Journal Contribution
Palavras-chave: Marine molluscs; Malacology; Biodiversity; Abundance; Malacology; Biodiversity; Http://aims.fao.org/aos/agrovoc/c_4528; Http://aims.fao.org/aos/agrovoc/c_33949.
Ano: 2009
URL: http://hdl.handle.net/1834/3364

Composición y estructura trófica de los macroinvertebrados terrestres de a isla Malpelo, Pacífico colombiano
Provedor de dados: 20
Autores: Calero, David; López Victoria, Mateo; Chacón de Ulloa, Patricia.
Las islas oceánicas poseen ecosistemas con dinámicas especiales debido a su aislamiento y condicionesclimáticas influenciadas por el mar. Es el caso de la isla Malpelo, localizada en el Pacífico colombiano, en donde estudios previos mostraron una composición de invertebrados fuertemente dominada por depredadores. Con el propósito de contribuir al conocimiento de estos organismos en la isla, se realizaron muestreos en 22 parcelas, abarcando tres tipos de microhábitat, clasificados de acuerdo al tipo de suelo, sombra y vegetación. Las colectas se realizaron entre mayo y junio de 2006, mediante captura directa. Se obtuvieron 1294 especímenes, pertenecientes a siete clases y 25 órdenes. La diversidad estuvo determinada por la complejidad en la estructura del...
Tipo: Journal Contribution
Palavras-chave: Abundance; Oceanic islands.
Ano: 2011
URL: http://hdl.handle.net/1834/4426

Abundancia y distribución del ictioplancton, fito y zooplancton en el mar ecuatoriano en abril de 1995
Provedor de dados: 20
Autores: Luzuriaga de Cruz, M.; Elías, E.; Flores, M.E.
El presente trabajo trata de la distribución de la abundancia de huevos y larvas de peces en relación con la abundancia del zooplancton y fitoplancton colectado en 13 estaciones muestreadas a bordo del B/I TOHALLI durante el crucero pelágico-oceanográfico realizado en abril de 1995. Se analizó un total de 12820 huevos de peces. (10m²)¹ y 5145 larvas de peces (10m²)¹. La mayor abundancia de huevos y larvas de peces se localizó al este de las Islas Galápagos, en las estaciones 1P y 10, situadas en los extremos norte y sur del área de muestreo a la altura de la Isla San Cristóbal, con 5226 huevos (10m²)¹ y 1042 larvas (10m²)¹, respectivamente, mientras que la menor abundancia se localizó también al este de la Islas Galápagos, en las estaciones 7 y 5 con 109...
Tipo: Journal Contribution
Palavras-chave: Abundance; Ichthyoplankton; Phytoplankton; Zooplankton; Cruises; Fish eggs; Fish larvae; Phytoplankton; Zooplankton; Fish larvae; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_2924.
Ano: 1998
URL: http://hdl.handle.net/1834/2278

Evaluación del stock desovante de merluza del sur y merluza de cola en la zona sur austral, año 2004
Provedor de dados: 20
Autores: Lillo, S.; Céspedes, R.; Ojeda, V.; Balbontín, F.; Bravo, R.; Saavedra, A.; Barbieri, M.A.; Vera, C.
El presente informe contiene los resultados finales del proyecto FIP 2004-07, licitado y financiado por el Fondo de Investigación Pesquera (FIP). Dichos resultados dicen relación con cuantificar el stock desovante de ambos recursos presentes en la zona de aguas exteriores de las regiones X y XI, así como también determinar su distribución, abundancia, además de las características biológicas y pesqueras relevantes.
Tipo: Report
Palavras-chave: Spawning populations; Stock assessment; Geographical distribution; Abundance; Biological data; Stock assessment; Geographical distribution; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_5083.
Ano: 2005
URL: http://hdl.handle.net/1834/1842

Abondonce relative et estimation de la biomasse des petits pelagiques des eaux tunisiennes
Provedor de dados: 20
Autores: Hattour, A.; Ben Abdallah, L.; Guennegan, Y.
Within the frame of the National Program (PNM), 'Assessment of Marine Tunisian Resources' (1996-1999), two prospecting surveys on small pelagic fishes, have been led in narrow collaboration with French Institute IFREMER. Their objectives were to specify the relative fishes abundance, their spatial-temporal variability but also to quantify the maximum sustainable yield (MSY) of this resource. A third important goal was to familiarize a Tunisian scientist team, with numerical methods and data processing used during the cruises (reading of echograms, treatments of data, etc.) in stocks assessment. It is known that the indirect stocks assessment methods of small pelagic species is not reliable, reason for which we opted to apply echo - integration techniques....
Tipo: Journal Contribution
Palavras-chave: Abundance; Biomass; Fishery surveys; Pelagic fisheries; Potential yield; Stock assessment; Biomass; Stock assessment; Pelagic fisheries; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_5659.
Ano: 2004
URL: http://hdl.handle.net/1834/4237

Monitoreo de las condiciones bio-oceanográficas entre la I y IV Regiones, año 2005. Informe Final corregido. 2da. Versión
Provedor de dados: 20
Autores: Braun, M.; Valenzuela, V.; Reyes, H.; Castillo, J.; Pizarro, M.; Catasti, V.; Saavedra, J.; Letelier, J.
En el presente informe se entregan los resultados de las condiciones oceanográficas fisico-químicas, la distribución geográfica, abundancia y variabilidad estacional e interanual de huevos y larvas de anchoveta, sardina, jurel y caballa y la distribución espacial e índices de densidad y cobertura geográfica de los recursos detectados por medio de técnicas hidroacústicas entre la I y IV Regiones, obtenidos durante los cruceros estacionales realizados en invierno y primavera de 2005 y verano de 2006.
Tipo: Report
Palavras-chave: Echo surveys; Geographical distribution; Abundance; Seasonal variations; Fish eggs; Fish larvae; Physical oceanography; Chemical oceanography; Geographical distribution; Physical oceanography; Fish larvae; Chemical oceanography; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_5830; Http://aims.fao.org/aos/agrovoc/c_2924; Http://aims.fao.org/aos/agrovoc/c_1516.
Ano: 2007
URL: http://hdl.handle.net/1834/1850

Diagnóstico del plancton en el estuario de San Lorenzo en agosto 2006 (Esmeraldas-Ecuador)
Provedor de dados: 20
Autores: Torres, G.; Andrade, C.
Se realizó un monitoreo del plancton en el estuario de San Lorenzo en junio 2006. En los resultados se registró 128 especies del fitoplancton (método cuantitativo) y 50 especies (cualitativo). Las diatomeas más representativas fueron S. costatum, T. nitzschioides, P. longissima, L. danicus, Navicula sp., P. sulcata: T. nitzschioides. Thalassiosira sp. y flagelados (cuantitativo); S. costatum, Coscinodiscus sp., N. sigma y P.  Sulcata (cualitativo). La presencia de Gymnodinium sp. P. maximun y M. rubrum podría asociarse con la formación de mareas rojas al interior del estuario. En los resultados del zooplancton registrarón 16 taxas constituidos mayoritariamente por Zoeas de Brachiura y Copépodos, distribudidos en toda el área de estudio principalmente en...
Tipo: Journal Contribution
Palavras-chave: Plankton; Diatoms; Phytoplankton; Zooplankton; Biomass; Fish larvae; Eggs; Abundance; Estuaries; Species diversity; Zooplankton; Biomass; Eggs; Estuaries; Plankton; Phytoplankton; Fish larvae; Species diversity; Diatoms; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_2502; Http://aims.fao.org/aos/agrovoc/c_2673; Http://aims.fao.org/aos/agrovoc/c_5950; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_2924; Http://aims.fao.org/aos/agrovoc/c_33954; Http://aims.fao.org/aos/agrovoc/c_32657.
Ano: 2007
URL: http://hdl.handle.net/1834/2378

Distribución batimétrica, espacial y temporal del macrozoobentos en el Canal Beagle, Tierra del Fuego, Argentina
Provedor de dados: 20
Autores: Diez, M.
El Canal Beagle (Tierra del Fuego, Argentina) se encuentra en el sistema de canales fueguinos que representa el ambiente marino subantártico costero más estrechamente relacionado con la Antártida. Además, el Canal Beagle constituye una vía de intercambio de fauna y flora ente los océanos Pacífico y Atlántico. El objetivo de este trabajo fue determinar la composición, abundancia y biomasa del macrozoobentos en el Canal Beagle como también la producción secundaria de los ensambles bentónicos. Durante 1999 y 2000, en forma estacional, en tres áreas diferentes y en dos rangos de profundidad: 40m y 70m, se tomaron muestras del macrozoobentos mediante el uso de una rastra epibentónica. Los organismos se identificaron y cada taxón se contó y pesó para determinar...
Tipo: Theses and Dissertations
Palavras-chave: Zoobenthos; Seasonal distribution; Abundance; Biomass; Secondary production; Marine environment; Biomass; Marine environment; Zoobenthos; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_4610; Http://aims.fao.org/aos/agrovoc/c_15487.
Ano: 2006
URL: http://hdl.handle.net/1834/3545

Ictioplancton presente en el Golfo de Guayaquil durante la etapa de prospección acústica y pesca comprobatoria, septiembre 1995
Provedor de dados: 20
Autores: Ortega, D.
During the 14th and 27th of november 1995, were colected samples to determinate distribution, presence of eggs and fish larvae in the Guayaquil Gulf waters. The highest quantity of fish larvae 2 500 larvae.(10m2)-1 was showed (02~'40'S - 82~'50'W); while the fish eggs was registered as 15 000 eggs.(10m2)-1. The minor quantities of fish larvae between 48 and 57 larvae.(10m2)-1, which located around longitude 81~'20' - 82~'40'W and latitude 02~'40'S - 02~'50'S. In the North part of the Guayaquil Gulf, fish larvae were registered at concentrations between 500 and 2000 larvae.(10m2)-1, near Tip of Santa Elena (02~'25'W and 81~'10'W), a the one area which presented the hightest quantity 150 000 eggs.(10m2)-1 of fish eggs; the Carangidae and Scombridae families...
Tipo: Journal Contribution
Palavras-chave: Ichthyoplankton; Geographical distribution; Abundance; Fishery resources; Pelagic fisheries; Geographical distribution; Fishery resources; Pelagic fisheries; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_2942; Http://aims.fao.org/aos/agrovoc/c_5659.
Ano: 1996
URL: http://hdl.handle.net/1834/2963

Moluscos bentónicos de la Guajira (10 y 50 M de profundidad), Caribe colombiano
Provedor de dados: 20
Autores: Fontalvo-Palacio, E.; Gracia-C., A.; Duque-Nivia, G.
Se  estudió  la  composición  y  abundancia  de  los  moluscos  bentónicos  encontrados  en  el departamento de La Guajira al norte del Caribe colombiano. Para esto se realizó un crucero de investigación a bordo del B/I Ancón del INVEMAR en donde se llevaron a cabo arrastres a 10 y 50 m de profundidad. Se recolectó un total de 4840 individuos, identificándose 215 especies pertenecientes a las clases Gastropoda, Bivalvia, Scaphopoda, Cephalopoda y Polyplacophora, dentro de las cuales 19 fueron especies registradas por primera vez para el departamento. La clase Gastropoda presentó el mayor número de especies (52 %) y Bivalvia la mayor abundancia (71 % de los individuos), siendo el bivalvo Laevicardium sybariticum la especie más abundante del área de estudio....
Tipo: Journal Contribution
Palavras-chave: Abundance.
Ano: 2010
URL: http://hdl.handle.net/1834/4024

Abundancia y distribucion de huevos y larvas de la merluza argentina (Merluccius hubbsi Marini, 1933) en un area de desove intensivo en el litoral norpatagonico.
Provedor de dados: 20
Autores: Bellizia, L.L.; Pan, J.; Venerus, L.A.
Argentine hake Merluccius hubbsi represents nowadays the main fishery resource of the Argentine Sea, in spite of the fact that the percentage of captures related to total fishery production has fallen down 30% in the last decade. The abundance and distribution of hake eggs and larvae in an intense spawning area in front of Isla Escondida (Chubut province), are analyzed. This phenomena was studied from a comparative-historical point of view allowing to apppreciate the evolution of a resource at present undergoing an overfishing pressure, capable of pushing it to collapse. Since 1973 maximum egg densities diminished and, if total egg production is considered a reliable index for recruitment prediction, no signs of overcoming stocks can be seen. On the other...
Tipo: Theses and Dissertations
Palavras-chave: Fish larvae; Fish eggs; Abundance; Spawning; Spawning; Fish larvae.
Ano: 2000
URL: http://hdl.handle.net/1834/1477

Analyse de l'indice d’abondance des principales espèces de sparidés à travers les campagnes de chalutage de 1982 à 1992
Provedor de dados: 20
Autores: Ould Mohamed Fall, K.
Résumé : L’indice d’abondance des principales espèces de sparidés pêchées en Mauritanie a été suivi dans les campagnes de chalutage démersal du CNROP en saison froide, chaude et transition, durant la période allant de 1982 à 1992. Des affinités par zone (cas de Diplodus bellottii, Pagellus bellottii, et Sparus caeruleostictus) et par saison (Dentex macrophtalmus) ont été observées. Un indice moyen mensuel a été dégagé pour les 6 espèces étudiées et les aires de distribution ainsi que les zones d’abondance déterminées.
Tipo: Journal Contribution
Palavras-chave: Spatial distribution; Abundance; Trawlers; Fishery surveys.
Ano: 1995
URL: http://hdl.handle.net/1834/255

Distribución y abundancia de diatomeas del género Pseudo Nitzschia en condición de el Niño 2007 sobre la cuenca pacífica colombiana
Provedor de dados: 20
Autores: Galeano Ch., A. M.; Arteaga S., E.
Se describe la distribución espacial y abundancia de diatomeas pertenecientes al género Pseudo-nitzschia en la cuenca pacífica colombiana (CPC) durante la campaña  oceanográfica PACÍFICO XLIV-ERFEN XLII, evaluando su comportamiento frente a las variables de temperatura y salinidad. Se realizaron muestreos de fitoplancton (con botellas Niskin de 5 L) a dos profundidades (superficial y 50 m) en 25 estaciones. Se observó que en superficie se registraron las mayores abundancias del género distribuyéndose especialmente en la zona intermedia de la CPC. Este patrón de distribución coincidió con valores bajos de temperatura y altos en salinidad. Debido a lo anterior, se encontraron diferencias significativas en la abundancia de Pseudo-nitzschia entre las dos...
Tipo: Journal Contribution
Palavras-chave: Distribution; Abundance; Distribution; Http://aims.fao.org/aos/agrovoc/c_35773.
Ano: 2010
URL: http://hdl.handle.net/1834/3733

Distribución y abundancia de diatomeas del género Pseudo Nitzschia en condición de el Niño 2007 sobre la cuenca pacífica colombiana
Provedor de dados: 20
Autores: Galeano-Ch., Ana M.; Arteaga-S., Edgar.
Se describe la distribución espacial y abundancia de diatomeas pertenecientes al género Pseudo-nitzschia en la cuenca pacífica colombiana (CPC) durante la campaña oceanográfica PACÍFICO XLIV-ERFEN XLII, evaluando su comportamiento frente a las variables de temperatura y salinidad. Se realizaron muestreos de fitoplancton (con botellas Niskin de 5 L) a dos profundidades (superficial y 50 m) en 25 estaciones. Se observó que en superficie se registraron las mayores abundancias del género distribuyéndose especialmente en la zona intermedia de la CPC. Este patrón de distribución coincidió con valores bajos de temperatura y altos en salinidad. Debido a lo anterior, se encontraron diferencias significativas en la abundancia de Pseudo-nitzschia entre las dos...
Tipo: Journal Contribution
Palavras-chave: Distribution; Abundance; Phytoplankton; Algae; Distribution; Phytoplankton; Algae; Http://aims.fao.org/aos/agrovoc/c_35773; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_258.
Ano: 2010
URL: http://hdl.handle.net/1834/3744

Caracterización de los bosques de manglar y las praderas de Thalassia testudinum de la Isla La Tortuga y cayos adyacentes, Venezuela
Provedor de dados: 20
Autores: del Mónaco, C.; Giménez, E.; Narciso, S.; Alfonso, F.; Bustillos, F.
Los bosques de manglar y las praderas de fanerógamas marinas representan ecosistemas tropicales costeros muy productivos, con una alta diversidad de especies. El objetivo fue caracterizar los bosques de manglar y las praderas de Thalassia testudinum de la isla La Tortuga y los cayos adyacentes. Las localidades donde se evaluaron los bosques de manglar fueron Punta del Este, Los Tortuguillos, Boca de Cangrejo, Boca de Palo y Los Mogotes mientras que de las praderas fueron Punta del Este, Boca de Cangrejo, Boca de palo, Los Tortuguillos y Cayo Herradura. En cada bosque se establecieron parcelas aleatorias de 100 m2; se registró la densidad de árboles por especie, diámetro del tallo, altura y cobertura. En las praderas se establecieron cuadratas de 1 m2...
Tipo: Journal Contribution
Palavras-chave: Abundance.
Ano: 2010
URL: http://hdl.handle.net/1834/3832

Significado paleobiológico y paleoambiental de las concentraciones holocenas de Heleobia (Gastropoda) presentes en el sudeste de la provincia de Buenos Aires.
Provedor de dados: 20
Autores: De Francesco, C.G.
The aim of the present work is to determine the paleobiological and paleoenvironmental significance of fossil concentrations of Heleobia Stimpson, 1865 (Gastropoda) deposited during the last transgressiveregressive cycle along the Atlantic coast. The work was divided into two stages : 1) the analysis of living populations of H. australis (d'Orbigny), I-1. conexa (Gaillard) and H. parchappii (d'Orbigny) in two estuarine environments from the southeastern coast of the Buenos Aires Province (Mar Chiquita coastal lagoon and Quequen Grande estuary) in order to know the range of variation of the main biological and ecological factors and 2) the paleoecological analysis of three holocene sequences from the same region (mouth of the Quequen Grande River, Mouth of...
Tipo: Theses and Dissertations
Palavras-chave: Palaeoenvironments; Palaeoecology; Spatial variations; Comparative studies; Taxonomy; Morphometry; Abundance; Taxonomy; Http://aims.fao.org/aos/agrovoc/c_7631.
Ano: 2002
URL: http://hdl.handle.net/1834/2971

Distribución espacio-temporal del ictioplancton y zooplancton marino en las Islas Galápagos, Ecuador (1988-2001)
Provedor de dados: 20
Autores: Luzuriaga de Cruz, M.
La distribución del ictioplancton y zooplancton alrededor de las Islas Galápagos, 89°W, 92°30'W y 01°N, 02°S, fue realizada con datos e información proveniente de cruceros de investigación entre los años 1988 hasta 2001. Áreas de mayor abundancia de zooplancton  e ictioplancton han sido identificadas hacia el norte y sur de Isla Isabela y alrededor de la Isla Fernandina, asociados a la Corriente de Cromwell y afloramiento foraminíferos planctónicos, larvas de eufásidos y copépodos fueron predominantes en las áreas mencionadas. Activa productividad secundaria relacionada con el frente ecuatorial se observó también hacia el sureste de Isabela, este de San Cristóbal y norte de Isla Santiago, con elevados porcentajes (&gt;50%) de Globigerina bulloides...
Tipo: Journal Contribution
Palavras-chave: Ichthyoplankton; Zooplankton; Upwelling; Foraminifera; Abundance; Cruises; Zooplankton; Http://aims.fao.org/aos/agrovoc/c_15490.
Ano: 2009
URL: http://hdl.handle.net/1834/3358

Importancia de diferentes taxa de copepodos en la dieta de los adultos de anchoita (Engraulis anchoita) bonaerense durante la época reproductiva
Provedor de dados: 20
Autores: Padovani, L.
Engraulis anchoita is the most abundant and widespread ichthic species in the SW Atlantic. Two populations of the species occur in the Argentine Sea, a northern one or Bonaerense (34 degree -41 degree S)and a southern one or Patagonian (41 degree -47 degree S). The former performs an annual migratory cycle which includes the concentration in the northern area in winter, the distribution in coastal waters off Buenos Aires prov. during spring spawning period and the concentration in the shelf feeding ground in summer. In this work the feeding habits of the northern population were studied in its spring habitat. Fish samples were obtained in 16 stations from the Buenos Aires prov. shelf, during a research cruise of the INIDEP (National Institute for Fisheries...
Tipo: Theses and Dissertations
Palavras-chave: Abundance; Environmental conditions; Feeding behaviour; Food preferences; Stomach content; Zooplankton; Ichthyoplankton surveys; Feeding behaviour; Food preferences; Zooplankton; Environmental conditions; Http://aims.fao.org/aos/agrovoc/c_10778; Http://aims.fao.org/aos/agrovoc/c_3024; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_32980.
Ano: 2006
URL: http://hdl.handle.net/1834/2600

Abundancia y distribución del delfín (Tursiops truncatus, Montagu, 1821) en la costa norte de la provincia de Matanzas, Cuba
Provedor de dados: 20
Autores: González-Sansón, G.; López, N.; Pérez-Cao, H.; Blanco, M.; Lio, V.
Entre junio del 2002 y agosto del 2003 se evaluó la abundancia y distribución de delfines toninas (Tursiops truncatus) en la costa norte de la provincia de Matanzas. Fue empleada la técnica de muestreo a distancia durante seis salidas, en las cuales se recorrieron 1 553,3 Km en 164 horas de esfuerzo. Se analizaron las diferencias en abundancia de delfines por zonas (Costa Norte, Bahía de Cárdenas, Cinco Leguas), estaciones y horario del día y su relación con la temperatura del agua y el estado de la marea. Se observaron 253 delfines en 34 avistamientos. El tamaño de grupo más frecuente fue de ocho individuos. El mayor número de avistamientos realizados ocurrió en la en la parte norte del área de estudio. No se detectaron diferencias estadísticas en la...
Tipo: Journal Contribution
Palavras-chave: 1371; Abundance; Distribution; Tursiops truncatus; Distribution.
Ano: 2009
URL: http://hdl.handle.net/1834/4118

Variación espacial de la biodiversidad mesozooplantónica en un sector de la plataforma costera bonaerense (34°-41° S)
Provedor de dados: 20
Autores: Cepeda, G.
En las últimas décadas ha crecido la conciencia a nivel mundial de que la biodiversidad en el océano está sufriendo importantes alteraciones debido a la actividad humana y al cambio climático global, y de que estas alteraciones en muchos casos son irreversibles. Por tal motivo diversos autores señalan la necesidad de enfatizar los estudios de biodiversidad en todos los ambientes marinos (Angel, 1991; Lasserre, 1991; Gray, 2001). Actualmente se están realizando grandes esfuerzos a nivel internacional para incrementar el conocimiento de la diversidad, distribución y abundancia de la vida marina en general (Proyecto Census of Marine Life; www.coml.org) y del zooplancton en particular (Proyecto Census of Marine Zooplankton; www.cmarz.org). La biodiversidad de...
Tipo: Theses and Dissertations
Palavras-chave: Zooplankton; Environmental conditions; Hydrography; Abundance; Assemblages; Identification keys; Geographical distribution; Geographical distribution; Zooplankton; Environmental conditions; Hydrography; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_32980; Http://aims.fao.org/aos/agrovoc/c_3727.
Ano: 2006
URL: http://hdl.handle.net/1834/2951

Patrones de utilización de la laguna Mar Chiquita (Buenos Aires, Argentina) y área costera adyacente por parte de los primeros estadios ontogénicos de peces
Provedor de dados: 20
Autores: Bruno, Daniel O.
The role of the Mar Chiquita lagoon and its adjacent coastal area as nursery ground for fish larvae and juveniles and the factors which regulate their recruitment process, was evaluated. To do so, we analyzed the fish early life stages composition and spatio-temporal variation over the marine-estuarine gradient of the lagoon and its relationship with environmental factors; the diel variation of these stages in the immediate area at the mouth of the lagoon; and the source of the organic carbon which feed them on the mouth of the lagoon and adjacent coastal area, by using stable isotope analysis. The richness and mean density of larvae were higher at the offshore area than at the lagoon. Inside the lagoon the dominant species in larval stage was Brevoortia...
Tipo: Theses and Dissertations
Palavras-chave: Brackishwater fish; Fish larvae; Juveniles; Recruitment; Life cycle; Environmental factors; Abundance; Brackishwater environment; Coastal lagoons; Brevoortia aurea; Gobiosoma parri; Platanichthys platana; Ramnogaster arcuata; Odontesthes argentinensis; Engraulidae; Brackishwater environment.
Ano: 2014
URL: http://hdl.handle.net/1834/5819

Nematodes parásitos como indicadores biológicos de Macruronus magellanicus
Provedor de dados: 20
Autores: Incorvaia, I.S.; Hernandez, D.R.
A wide distributional range species can constitute many populations or fishing stocks which can be whole or partly overlapped within their distribution area, reason why they must be clearly identified. Therefore, proper identification of stocks is necessary for fisheries management, as this is the unit to which the fishing effort should be applied. The parasitological method is one of the systems currently used to determine stock. Nematodes parasites of Macruronus magellanicus (longtail hake) collected during surveys enmarked between 45º S-55º S in the Southwest Atlantic were studied. Nematodes that could be used as biological indicators were selected. Mean abundance values of L3 Anisakis simplex and Hysterothylacium aduncum were estimated. Three different...
Tipo: Journal Contribution
Palavras-chave: Indicator species; Abundance; Endoparasites; Endoparasites; Indicator species; Http://aims.fao.org/aos/agrovoc/c_10603; Http://aims.fao.org/aos/agrovoc/c_35790.
Ano: 2006
URL: http://hdl.handle.net/1834/1565

Variación de la malacofauna bentónica intermareal y submareal de la Bahía de Santa Elena, Ecuador, entre el 2006 - 2007
Provedor de dados: 20
Autores: Cruz P., M.
Del análisis de 40 muestras de sedimentos submareales obtenidos a 10, 15, 20 y 25 m. de profundidad y de 30 muestras bentónicas del área rocosa de la zona intermareal, durante los años 2006 y 2007, se identificaron un total de 55 especies de moluscos en la Bahía de Santa Elena, de los cuales 28 especies son bivalvos, 24 gasterópodos, 2 escafópodos y un poliplacóforo. El área rocosa de la zona intermareal, durante el 2006, desde el límite de la bajamar hasta la zona media aproximadamente, predominó el bivalvo Brachidontes puntarenensis con el 64,2% y en el 2007 esta misma especie siguió predominando con el 86%, mientras que los gasterópodos en el 2006, desde la zona media hasta el límite de la pleamar predominó Littorina paytensis con el 45%, esta misma...
Tipo: Journal Contribution
Palavras-chave: Marine molluscs; Malacology; Biodiversity; Abundance; Malacology; Biodiversity.
Ano: 2009
URL: http://hdl.handle.net/1834/3364

A drift study of vertical distribution and mortality of Engraulis anchoita eggs and larvae.
Provedor de dados: 20
Autores: Sánchez, R.P.; de Ciechomski, J.D.; Lasta, C.A.; Guerrero, R.A.
Lagrangian changes in distribution and survival within an anchovy egg and larvae patch were studied by means of multiple opening/closing sampling following a free drifting buoy. The buoy was equipped with a radar reflector and flashing light, and it was connected to a current cross drogue floating at 15 m depth, which corresponded to the main egg and larvae concentration within the patch. The drifter was launched on the Buenos Aires continental shelf, off Necochea during the spring spawning peak of 1983. Three discrete depths (within, below and above the thermocline)were repeatedly sampled close to the drogue with a Motoda sampler. Egg and larval abundances in the vicinity of the drogue were monitored at 3/4 hour intervals for a period of three days. Each...
Tipo: Journal Contribution
Palavras-chave: Fish larvae; Fish eggs; Vertical migrations; Feeding; Environmental effects; Ichthyoplankton surveys; Vertical distribution; Survival; Abundance; Drifting data buoys; Fishery surveys; Feeding; Fish larvae; Survival; Http://aims.fao.org/aos/agrovoc/c_2838; Http://aims.fao.org/aos/agrovoc/c_2924; Http://aims.fao.org/aos/agrovoc/c_7538.
Ano: 1999
URL: http://hdl.handle.net/1834/1871

Variación estacional del zooplancton en el sector estuarial de la laguna Mar Chiquita. Su relación con algunas variables ambientales.
Provedor de dados: 20
Autores: Firpo, C.
El zooplancton de lagunas costeras se caracteriza por su baja diversidad y la dominancia de algunas especies que toleran sus condiciones ambientales cambiantes. La laguna costera Mar Chiquita está ubicada a los 37º32'S - 37º45’S y 57º19’-57º26’ W, posee un cuerpo lagunar de escasa profundidad y un canal por el cual se conecta con el mar, que posee características estuariales. Dada la escasa información referida al zooplancton de esta laguna el presente trabajo tiene como objetivo describir la taxocenosis del zooplancton, las variaciones estacionales de la abundancia y diversidad y la relación de dichas variaciones con la salinidad y temperatura, para dos estaciones ubicadas en el sector estuarial. Los muestreos mensuales se realizaron en dos estaciones...
Tipo: Theses and Dissertations
Palavras-chave: Zooplankton; Seasonal variations; Environmental conditions; Abundance; Community composition; Brackishwater environment; Coastal lagoons; Zooplankton; Environmental conditions; Coastal lagoons.
Ano: 2002
URL: http://hdl.handle.net/1834/3911

JAMARC-INIDEP joint research cruise on Argentine short-finned squid Illex argentinus. January-March 1997.
Provedor de dados: 20
Autores: Brunetti, N.E.; Ivanovic, M.L.; Rossi, G.R.; Elena, B.; Benavides, H.R.; Guerrero, R.A.; Blanco, G.; Marchetti, C.; Piñero, R.
The distribution, abundance and population structure of Illex argentinus in relation to the oceanographic conditions during summer 1997, were analyzed as a result of the research cruise carried out by R/V Shinko Maru No.3 on the Argentine shelf (39-50°30'S). Besides, abundance and biological features of Ommastrephes bartrami are analyzed. The main activities carried out during the cruise included jigging operations, tagging (only for I. argentinus) and biological sampling. In addition, meteorological and oceanographic data were collected. A total of 30,2000 individuals were tagged and released. The recapture rate was 0.156.  (47 recoveries/30,200 released), considerably higher than that of 1996 (0.030; 4 recoveries/13,191 released). I. argentinus was...
Tipo: Journal Contribution
Palavras-chave: Fishery surveys; Abundance; Population structure; Tagging; Cruise reports; Population structure; Tagging; Http://aims.fao.org/aos/agrovoc/c_6115; Http://aims.fao.org/aos/agrovoc/c_14775.
Ano: 2000
URL: http://hdl.handle.net/1834/2537

Evaluación del stock desovante de anchoveta en la I y II Regiones, año 2004, (Fase 1)
Provedor de dados: 20
Autores: Braun, M.; Reyes, H.; Pizarro, M.; Saavedra, J.; Catasti, V.; Claramunt, G.; Díaz, E.
El informe contiene los resultados correspondientes  al desarrollo del crucero Módulo Huevos y Módulo Adultos del proyecto FIP 200-04-1. De conformidad con la metodología planteada en la propuesta técnica y con el fin de estimar en esta primera fase algunos de los parámetros biológicos aplicables para el Método de Producción de Huevos, a saber: proporción sexual y peso promedio estimado de hembras maduras, además de la determinación de las zonas de distribución y abundancia de huevos y su asociación con las condiciones oceanográficas, se realizaron los respectivos muestreos para el recurso anchoveta, durante el período de máxima actividad reproductiva del año 2004.
Tipo: Report
Palavras-chave: Fish eggs; Abundance; Geographical distribution; Sex ratio; Environmental conditions; Geographical distribution; Sex ratio; Environmental conditions; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_7014; Http://aims.fao.org/aos/agrovoc/c_32980.
Ano: 2005
URL: http://hdl.handle.net/1834/1813

Biología y distribución de la familia Aplysiidae (Babosas de mar), en la zona intermareal del Ecuador, desde el 2003 al 2005
Provedor de dados: 20
Autores: Cruz, M.; Hill, D.; Cortez, P.
El propósito de este trabajo es contribuir a conocer que especies de vaquitas o babosas de mar tenemos en la costa del Ecuador, cual es su abundancia, distribución, densidad, hábitat e importancia que tienen estas especies, dar a conocer sus características taxonómicas, que permitan ser identificadas por otros investigadores para que puedan desarrollar otros trabajos de investigación.
Tipo: Journal Contribution
Palavras-chave: Marine molluscs; Abundance; Habitat; Coastal zone; Geographical distribution; Intertidal environment; Organism morphology; Geographical distribution; Intertidal environment; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_3923.
Ano: 2007
URL: http://hdl.handle.net/1834/2347

Ommastrephes bartramii: a potential target for the squid fishery in the Southwest Atlantic
Provedor de dados: 20
Autores: Brunetti, N.E.; Ivanovic, M.L.
Six exploratory cruises on board of the Japanese RV "Shinko Maru N°3" were carried out between 1997 and 2002 to obtain data on red squid (Ommastrephes bartramii)in the oceanic area of the SW Atlantic off Argentina and Uruguay (33° S-42° S/43° W-55° W). Between 10 and 32 jigging stations were performed each year during the night at depths of 80-200 m. Positive catches were registered in the whole area investigated with yields ranging between 0.01 and 2.03 kg/ (hour*line)and 0.001-2.26 individuals/(hour*line). Total catches oscilated between 1,426 kg in 2002 and 2,825 kg in 2000 and sea surface temperature at the fishing stations between 7.5° C and 24.5° C. Yields higher than 1 individual/ (hour*line)were registered at surface temperatures of 22° C-24° C....
Tipo: Journal Contribution
Palavras-chave: Cephalopod fisheries; Fishery surveys; Yield; Exploratory fishing; Catch/effort; Abundance; Geographical distribution; Exploratory fishing; Geographical distribution; Http://aims.fao.org/aos/agrovoc/c_2759; Http://aims.fao.org/aos/agrovoc/c_5083.
Ano: 2004
URL: http://hdl.handle.net/1834/1504

Cobertura vegetal en las áreas circundantes a la Estación Pedro Vicente Maldonado
Provedor de dados: 20
Autores: Sócola, J.
Durante la VIII Expedición Antártica Ecuatoriana se llevó a cabo un estudio de la cobertura vegetal en Punta Fort Willams, Isla Greenwich. Los objetivos planteados fueron: Conocer el estado actual de  la vegetación, determinar la abundancia, dominación y frecuencia a través de la cobertura vegetal, así como la riqueza florística de las comunidades vegetales, para poder establecer si sufren impactos debido a las actividades antropogénicas. Se marcaron seis zonas de vegetación y se encontraron un total de 36 especies de líquenes distribuidos  en 13 familias y cuatro especies de musgos pertenecientes a cuatro familias.
Tipo: Journal Contribution
Palavras-chave: Abundance; Polar zones; Vegetation cover; Antarctic zone.
Ano: 2002
URL: http://hdl.handle.net/1834/3824

Nematodes parásitos como indicadores biológicos en las especies Macruronus magellanicus y Merluccius hubbsi (Pisces, Gadiformes)
Provedor de dados: 20
Autores: Incorvaia, I.S.
Parasites nematodes as biological tags of Macruronus magellanicus (longtail hake) and Merluccius hubbsi (hake) colleted between 34°- 55°S in the SW Atlantic were studied. Adult specimens of Hysterothylacium aduncum, Ascarophis marina and Ichthytofilaria argentinensis, and the third-stage specimens of H. aduncum, Anisakis simplex and Contracaecum aduncum were described. Histological studies showed that I. argentinensis provokes tissue reactions in the swim bladder of  M. hubbsi.  A wide distributional range of species can be represented by many fish populations or fishing stocks. As these can overlap in space, the proper identification of stocks is necessary for fisheries management. The parasitologic method is one currently used to determine stocks....
Tipo: Theses and Dissertations
Palavras-chave: Stock identification; Parasites; Indicator species; Abundance; Histology; Marine fish.
Ano: 2002
URL: http://hdl.handle.net/1834/5030

Los recursos de peces demersales de la Plataforma Continental del Ecuador. Parte uno. Distribución, abundancia y variaciones
Provedor de dados: 20
Autores: Herdson, D.; Rodríguez, W.; Martínez, J.
A survey of demersal fish resources of the Continental Shelf of Ecuador was carried out between October 1980 an July 1985 by the National Fisheries Institute of Ecuador, with British Technical Cooperation. This report deals with the stock assessment part of the work. In the course of seven cruises, 366 valid diurnal hauls were made with a high-opening bottom trawl. The demersal fish resources were estimated by swept area methods and the results are presented. The overall average standing stock of demersal fish was 78 000 t of which 22 000 t was good fish, but 36 000 t were gurnards (Triglidae) and 3 000 t of unusable fish. The main stocks were gurnards, grunts and croakers, sharks and corvinas Cynoscion spp. The southern areas especially the Gulf of...
Tipo: Journal Contribution
Palavras-chave: Demersal fisheries; Geographical distribution; Abundance; Biomass; Demersal fisheries; Geographical distribution; Biomass; Http://aims.fao.org/aos/agrovoc/c_2173; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_926.
Ano: 1985
URL: http://hdl.handle.net/1834/3228

Composición, distribución y abundancia relativa de copépodos pelágicos calanoideos y no calanoideos en aguas ecuatorianas durante el evento La Niña en septiembre de 2001
Provedor de dados: 20
Autores: Tutasi, P.
El presente trabajo es una contribución para el conocimiento de la oceanografía biológica de la región ecuatorial tropical donde se manifiestan estas importantes perturbaciones climáticas.
Tipo: Journal Contribution
Palavras-chave: Community composition; Marine crustaceans; Abundance; Plankton; Zooplankton; Marine ecology; Indicator species; El Nino phenomena; Geographical distribution; Plankton; Zooplankton; Geographical distribution; Marine ecology; Indicator species.
Ano: 2006
URL: http://hdl.handle.net/1834/2329

Aspectos oceanográficos del plancton y su relación con el frente ecuatorial, durante septiembre del 2011
Provedor de dados: 20
Autores: Tapia, M.E.; Naranjo, Ch.
El presente trabajo comprende la composición y distribución del plancton en las Islas Galápagos. Para el efecto se establecieron 12 estaciones ubicadas en las secciones 83°- 86°-89° y 92°W, realizadas en septiembre del 2011. Se identificaron 71 especies de fitoplancton en muestras de red (50µ). Las diatomeas fueron dominantes y en menor concentración se observaron los Dinoflagelados, Cocolitofóridos, Silicoflagelados, Cianobacterias y Tintínnidos. En las muestras de red se observaron Chaetoceros eibenii, Rhizosolenia imbricata, Thalassiosira subtilis, Proboscia alata y Planktoniella sol características del Frente Ecuatorial en la sección 86°W y 02° sur. En zooplancton se registraron 17 taxa zooplanctónicas destacándose los grupos de Radiolarios 47.5%,...
Tipo: Journal Contribution
Palavras-chave: Composition; Distribution; Plankton; Diatoms; Abundance; Cruises.
Ano: 2012
URL: http://hdl.handle.net/1834/4705

Condición de los arrecifes de coral frente a costas con asentamientos humanos y aportes terrígenos: el caso del litoral habanero, Cuba
Provedor de dados: 20
Autores: Caballero, H.; Alcolado, P.M.; Semidey, A.
Coral reef condition north of the Havanan provinces (NW Cuba), an area with variable influence from human settlements and runoff, was assessed using the AGRRA methodology’s benthic biological indicators: live coral cover, coral density, maximum colony diameter, old and recent coral mortality, coral recruitment, Diadema antillarum density, and macroalgae cover. Coral communities at 11 reef crest and 22 forereef sites were sampled during 2004. The Shannon heterogenety and Pielou evenness indices were calculated. A total of 33 species of coral, larger than 10 cm in maximum diameter, were identified. The biological indicators analyzed showed significant differences among sites, which suggest a marked heterogeneity in environmental conditions along the study...
Tipo: Journal Contribution
Palavras-chave: Species diversity; Abundance; Coral reefs; Coral reefs; Species diversity; Http://aims.fao.org/aos/agrovoc/c_1880; Http://aims.fao.org/aos/agrovoc/c_33954.
Ano: 2009
URL: http://hdl.handle.net/1834/3521

Relación fitoplancton-zooplancton en el Pacífico Ecuatorial (Ecuador), durante septiembre 2001
Provedor de dados: 20
Autores: Salazar, E.; Mero, M.; Torres, G.; Calderón, T.; Franco, V.
El presente trabajo es una contribución al conocimiento de la bio-oceanografía del mar ecuatoriano, forma parte del Proyecto de Monitoreo de las condiciones oceanográficas en el mar ecuatoriano y su relación con eventos de El Niño, realizadas en el B/I ORION del Instituto Oceanográfico de la Armada (INOCAR) en septiembre-octubre 2001, como un aporte a la comunidad.
Tipo: Journal Contribution
Palavras-chave: Phytoplankton; Zooplankton; Biogeography; Abundance; Equatorial upwelling; El Nino phenomena; Distribution; Chlorophylls; Phytoplankton; Zooplankton; Distribution; Biogeography; Chlorophylls.
Ano: 2003
URL: http://hdl.handle.net/1834/2340

El savorin Seriolella porosa como un recurso estacional en el Golfo San Matias, Argentina
Provedor de dados: 20
Autores: Perier, M.R.; Di Giácomo, E.E.
The San Matias Gulf (Argentine Sea) fishery was historically developed and based on the catching of a target species: the common hake    Merluccius hubbsi. There are also other marketable species such as the savorin Seriolella porosa. The presence of this species in the gulf is characterized by its abundance, population structure and biology. The material used was derived from three information sources: fishing survey cruises, landing samplings and record of the fishing activity.The results obtained allowed to delimit a spawning ground and a nursery area. The relative abundance of the resource showed seasonal variations with the highest values in August. The captured range size was 19-59 cm for females and 19-56 cm for males. The first sexual maturity was...
Tipo: Journal Contribution
Palavras-chave: Population structure; Spawning grounds; Spawning seasons; Abundance; Fishery management; Stock assessment; Population structure; Fishery management; Stock assessment; Spawning grounds; Http://aims.fao.org/aos/agrovoc/c_6115; Http://aims.fao.org/aos/agrovoc/c_24026; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_7277.
Ano: 2002
URL: http://hdl.handle.net/1834/1701

Estimación de un índice de abundancia anual estandarizado para pescadilla de red (Cynoscion guatucupa), mediante la aplicación de un modelo lineal general; período 1992-2003
Provedor de dados: 20
Autores: Ruarte, C.O.; Perrotta, R.G.
The stripped weakfish (Cynoscion guatucupa) has a wide latitudinal distribution (22° S-43° S) and it is object of fishery in Brazil, Uruguay and Argentina (SW Atlantic). In this last country, it is mainly captured in the coastal region of Buenos Aires Province by means of a fleet, which has between 20 m and 30 m length. In Argentina, the average landings in the last 5 years were 9,900 t. It is the second commercial species among the coastal groups. There are two main fishery areas of this species: the Argentinean-Uruguayan Common Fishing Zone (AUCFZ) and the El Rincón area, in the South of bonaerense littoral. Due to the importance of this species, it is necessary to define an index of annual abundance to allow a suitable diagnosis of the fishery...
Tipo: Journal Contribution
Palavras-chave: Catch/effort; Size distribution; Abundance; Commercial fishing; Coastal fisheries; Coastal fisheries; Http://aims.fao.org/aos/agrovoc/c_1696.
Ano: 2007
URL: http://hdl.handle.net/1834/2519

Zooplancton en el estuario interior del Golfo de Guayaquil, durante mayo del 2001
Provedor de dados: 20
Autores: Naranjo, Ch.
Los objetivos del estudio son conocer la situación actual del zooplancton con la finalidad de conocer la composición, distribución y abundancia de las comunidades del zooplancton, resaltando las áreas de mayor productividad en el segundo eslabón de la cadena alimentaria. Establecer especies dominantes en la comunidad de quetognatos y su relación con los parámetros físicos en el estuario interior del Golfo de Guayaquil.
Tipo: Journal Contribution
Palavras-chave: Composition; Distribution; Biomass; Zooplankton; Salinity; Abundance; Biological production; Estuaries; Estuarine organisms; Biological production; Estuaries; Distribution; Biomass; Zooplankton; Salinity; Http://aims.fao.org/aos/agrovoc/c_36649; Http://aims.fao.org/aos/agrovoc/c_2673; Http://aims.fao.org/aos/agrovoc/c_35773; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_6751.
Ano: 2002
URL: http://hdl.handle.net/1834/2271

Evaluación hidroacústica del stock parental de merluza de tres aletas en su unidad de pesquería, año 2005
Provedor de dados: 20
Autores: Saavedra, A.; Correa, V.; Céspedes, R.; Ojeda, V.; Adasme, L.; Díaz, E.; Oliva, J.; Rojas, P.
El presente estudio tiene como objetivo evaluar el stock de merluza de tres aletas (Micromesistius australis) a través del método hidroacústico, entre las latitudes 47º y 51º S. Como parte del proyecto se realizó entre el 13 y el 22 de agosto de 2005 a bordo del B/F Unzen un crucero de prospección orientado a evaluar mediante un método de evaluación directa (evaluación acústica) su biomasa, abundancia y distribución, estimar la importancia relativa de la fauna acompañante, condiciones reproductivas y tróficas del stock y realizar un análisis de las agregaciones detectadas durante el crucero. Durante el estudio se realizaron 41 lances de pesca de reconocimiento (23 positivos) y 49 transectas acústicas.
Tipo: Report
Palavras-chave: Stock assessment; Echo surveys; Abundance; Biomass; Stock assessment; Biomass; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_926.
Ano: 2006
URL: http://hdl.handle.net/1834/1848

Abundancia y distribución del pepino de mar Isostichopus badionotus (Aspidochirota: Stichopodidae), en seis localidades de pesca al norte de la Isla la Juventud, Cuba
Provedor de dados: 20
Autores: Ortega, M.; Alfonso, I.
El presente trabajo comprende un estudio de la abundancia y distribución del pepino de mar I. badionotus, en seis localidades de pesca de la región norte de la Isla de la Juventud, Cuba, durante los años 2006 y 2007. En el 2006 se muestrearon los meses de septiembre y octubre y en el 2007, enero, finales de julio-principios de agosto y septiembre. La abundancia se determinó mediante transeptos lineales (100 x 2 m), en los que se capturaron todos los individuos presentes. Los datos de la pesquería expresados en Captura por Unidad de Esfuerzo (CPUE) se convirtieron a individuos por hectárea (ind./ha) para facilitar las comparaciones con las capturas ejercidas en cada año. Se empleó la prueba no paramétrica “U” de Mann y Whitney (    = 0,05) para determinar...
Tipo: Journal Contribution
Palavras-chave: Abundance; Distribution.
Ano: 2012
URL: http://hdl.handle.net/1834/4661

Los eufáusidos en el Pacífico sudeste (03°16'S-31°23'S) durante el evento "El Niño", diciembre de 1997
Provedor de dados: 20
Autores: Castañeda, P.
El objetivo de este trabajo es establecer las especies de eufáusidos que caracterizan a las masas de agua en el Pacífico sudeste durante "El Niño 1997".
Tipo: Journal Contribution
Palavras-chave: Distribution; Abundance; Marine crustaceans; El Nino phenomena; Species diversity; Zooplankton; Distribution; Zooplankton; Species diversity.
Ano: 1998
URL: http://hdl.handle.net/1834/2270

Composición, distribución y abundancia del plancton en el estuario de San Lorenzo, Esmeraldas - Ecuador
Provedor de dados: 20
Autores: Naranjo, Ch.; Tapia, M.E.
El presente trabajo es una contribución al estudio del plancton estuarino presente en el área comprendida del Canal de San Lorenzo, provincia de Esmeraldas, para lo cual existe poca información sobre este tema.
Tipo: Journal Contribution
Palavras-chave: Distribution; Composition; Abundance; Plankton; Phytoplankton; Zooplankton; Ichthyoplankton; Diatoms; Biomass; Distribution; Plankton; Phytoplankton; Zooplankton; Biomass; Diatoms; Http://aims.fao.org/aos/agrovoc/c_35773; Http://aims.fao.org/aos/agrovoc/c_5950; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_32657.
Ano: 2002
URL: http://hdl.handle.net/1834/2277

Evaluación de los índices de abundancia para corvina rubia (Micropogonias furnieri) y pez palo (Percophis brasiliensis) obtenidos mediante modelos lineales generales: simulaciones de Monte Carlo y análisis de las interacciones con el factor año
Provedor de dados: 20
Autores: Rico, M.R.; Hernández, D.R.; Carozza, C.R.
Assessment of abundance indexes for whitemouth croaker (Micropogonias furnieri) and brazilian flathead (Percophis brasiliensis) obtained with general linear models: Monte Carlo simulation and analysis of the interactions with the “year” factor. The effect of interactions with the year factor on the annual index of relative abundance obtained with general linear models applied to the cath per unit of effort data of whitemouth croaker and brazilian flathead commercial fleet was evaluated applying the Monte Carlo simulation. Levels on the relative percentage of variance explained by the interactions with the year factor (%RVEAÑO) were determined, above which loss of proportionality between the relative abundance series given by the index and the real series...
Tipo: Journal Contribution
Palavras-chave: Stock assessment; Abundance; Catch/effort; Simulation; Commercial species; Coastal fisheries.
Ano: 2013
URL: http://hdl.handle.net/1834/5503

Aspectos biológicos y ecológicos de los pelecípodos protobranquios integrantes de las comunidades bentónicas del Golfo San Jorge: Nuculana sulculata (Couthouy, 1852), Nucula puelcha d'Orbigny, 1842 y Malletia cumingii (Hanley, 1860)
Provedor de dados: 20
Autores: Piñero, R.A.
La costa patagónica y en especial el golfo San Jorge (Mar Argentino, Atlántico sudoccidental), son zonas de gran interés pesquero, destacándose este último por poseer una de las especies de mayor valor comercial del Mar Argentino: el langostino patagónico Pleoticus muelleri. En un nuevo concepto de análisis integrado, se estudia la relación de los recursos con su ambiente. En el caso particular del langostino, dado su hábito bentónico, resulta de importancia acceder al conocimiento sobre las distintas especies que conforman las comunidades bentónicas y sus interrelaciones. El estudio de las comunidades bentónicas del Golfo San Jorge ha sido realizado por Roux et al. (1995, 1997) consistiendo principalmente en la confección de un amplio inventario...
Tipo: Theses and Dissertations
Palavras-chave: Geographical distribution; Taxonomy; Benthos; Ecological associations; Abundance; Feeding behaviour.
Ano: 2001
URL: http://hdl.handle.net/1834/5031

Diagnóstico para la administración y conservación del recurso caracol Trophon en Bahía Gente Grande, XII Región
Provedor de dados: 20
Autores: González, J.; Daza, E.; Vargas, C.; Cortes, C.; Miranda, H.
El presente informe da cuenta de los resultados de las actividades realizadas para evaluar el estado actual del recurso caracol trophon (Trophon geversianus), en Bahía Gente Grande, en la XII Región. Se presenta la ubicación geográfica  y superficie de los bancos identificados de Trophon y Chorito (Mytilus chilensis), las estimaciones de densidad y abundancia, su estructura de tamaños, y se incorporan los resultados del estado del recurso en el área de estudio, y se realizan consideraciones para una propuesta de administración de las poblaciones de caracol trophon.
Tipo: Report
Palavras-chave: Marine molluscs; Abundance; Population density; Geographical distribution; Resource management; Geographical distribution; Population density; Resource management; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_6112; Http://aims.fao.org/aos/agrovoc/c_6524.
Ano: 2007
URL: http://hdl.handle.net/1834/1852

Composición y abundancia de dinoflagelados epibentónicos tecados potencialmente tóxicos de la Ensenada Guajimico, región Centro-Sur de Cuba
Provedor de dados: 20
Autores: Peraza Escarrá, R.; Moreira González, A. R.
La mayoría de las comunidades de dinoflagelados epibentónicos asociadas con macroalgas, sedimentos, corales y fanerógamas, son productoras de toxinas que causan síndromes de intoxicación en regiones tropicales y subtropicales. En Cuba, y especialmente en Cienfuegos, los estudios acerca de estas microalgas han sido escasos. Este trabajo estuvo dirigido a determinar la composición y abundancia de dinoflagelados epibentónicos tecados potencialmente tóxicos en la Ensenada Guajimico, Cienfuegos, y su relación con algunos factores ambientales. Las muestras se tomaron desde mayo de 2011 hasta marzo de 2012, con una frecuencia mensual. Se midió la temperatura, la salinidad, y el pH del agua; así como de manera semestral los nutrientes (N-NO2 –, N-NO3 –, N-NH4 +,...
Tipo: Journal Contribution
Palavras-chave: Abundance; Environmental factors; Toxicity.
Ano: 2012
URL: http://hdl.handle.net/1834/5719

Zooplankton biomass in the reproductive area of the southern blue whiting (Micromesistius australis).
Provedor de dados: 20
Autores: Sabatini, M.; Alvarez Colombo, G.L.; Ramirez, F.C.
Total and size-fractioned zooplankton biomass (larger and smaller than 5 mm) were analyzed over two cruises conducted in the late austral winter (September 1994 and 1995) in the area surrounding Malvinas Islands at the time that massive spawning of southern blue whiting was expected to take place. Biomass was rather uniformly distributed in the area and dominated by the fraction larger than 5 mm in which euphausiids and secondarily chaetognaths were dominating in terms of both weight and number. The smaller fraction was mostly made up of copepods. From the high occurrence of euphausiids and seasonal abundance of the several species of copepods normally present within the area it was hypothesised that the feeding requirements of juvenile and adult blue...
Tipo: Journal Contribution
Palavras-chave: Zooplankton; Abundance; Size distribution; Biomass; Spawning seasons; Zooplankton; Biomass; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_926.
Ano: 1999
URL: http://hdl.handle.net/1834/2568

Evaluación de la merluza (Merluccius hubbsi) en julio y agosto de 1994, entre 34º y 36ºS del Atlántico sudoccidental.
Provedor de dados: 20
Autores: Villarino, M.F.; Simonazzi, M.A.; Bambill, G.A.; Ibañez, P.M.; Castrucci, R.; Reta, R.
This report contains the objectives, data collected and results from a hake assessment survey carried out in the Argentine Sea between 34° and 46° S, during July and August 1994, on board of the R/Vs "Dr. E. L. Holmberg" and "Cap. Oca Balda". The main objectives of the survey were: 1) to estimate total biomass and total abundance per age class; 2) to study the size and age composition; 3) to define the maturity ogive per size and age; 4) to quantitatively determine cannibalism and predation indexes. The area covered by the survey where 149 trawls and 184 oceanographic stations were performed was close to 100,440 nm2 . Hake biomass between 34° and 46° S was estimated in 1,105,284 tons and the confidence interval at 95.  was ± 23.12. . Most of the biomass...
Tipo: Journal Contribution
Palavras-chave: Stock assessment; Abundance; Biomass; Fishery surveys; Population structure; Stock assessment; Biomass; Population structure; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_6115.
Ano: 2000
URL: http://hdl.handle.net/1834/2591

Distribución y abundancia de huevos y larvas de langostino patagónico (Pleoticus muelleri) (Penaeoidea, Solenoceridae) en las temporadas estivales de 2008 y 2009
Provedor de dados: 20
Autores: Moriondo Danovaro, P.
The study on distribution and abundance of eggs and early planktonic stages of red shrimp, Pleoticus muelleri (Bate, 1888), contributes to a better knowledge of the species dynamics. Results from processing and analyzing 72 plankton samples collected with Bongo net during two research cruises on board of FV “Arbumasa XVIII” and RV “Capitán Oca Balda”, carried out in the Patagonian littoral in March 2008 and January 2009, are presented. In both cruises, eggs and larval stages were found all over the study area. The highest punctual densities of eggs were recorded in the area known as “La Pared” (46° 45’ S-65° 55’ W and 46° 50’ S-65° 55’ W). Eggs indicate the presence of shrimp reproductive concentrations which, while migrating eastwards towards waters of...
Tipo: Journal Contribution
Palavras-chave: Fish larvae; Eggs; Abundance; Fishery surveys; Pleoticus muelleri; Marine environment.
Ano: 2011
URL: http://hdl.handle.net/1834/4880

Ecología del cangrejo violinista Uca uruguayensis: distribución, comportamiento reproductivo y su interacción con aves migratorias.
Provedor de dados: 20
Autores: Ribeiro, P.D.
Universidad Nacional de Mar del Plata, Facultad de Ciencias Exactas y Naturales (Argentina)
Tipo: Theses and Dissertations
Palavras-chave: Ecology; Density; Distribution; Reproductive behaviour; Interspecific relationships; Abundance; Trophic relationships; Predation; Environmental conditions; Distribution; Reproductive behaviour; Ecology; Predation; Density; Environmental conditions; Http://aims.fao.org/aos/agrovoc/c_35773; Http://aims.fao.org/aos/agrovoc/c_37902; Http://aims.fao.org/aos/agrovoc/c_2467; Http://aims.fao.org/aos/agrovoc/c_6162; Http://aims.fao.org/aos/agrovoc/c_2186; Http://aims.fao.org/aos/agrovoc/c_32980.
Ano: 2004
URL: http://hdl.handle.net/1834/2960

Monitoreo de las condiciones bio-oceanográficas entre la I y IV Regiones, año 2005
Provedor de dados: 20
Autores: Braun, M.; Valenzuela, V.; Reyes, H.; Castillo, J.; Pizarro, M.; Catasti, V.; Saavedra, J.
En el presente informe se entregan los resultados de las condiciones oceanográficas físico-químicas, la distribución geográfica, abundancia y variabilidad estacional e interanual de huevos y larvas de anchoveta, sardina, jurel y caballa y la distribución espacial e índices de densidad y cobertura geográfica de los recursos detectados por medio de técnicas hidroacústicas entre la I y IV Regiones, obtenidos durante los cruceros estacionales realizados en invierno y primavera de 2005 y verano de 2006.
Tipo: Report
Palavras-chave: Abundance; Geographical distribution; Fish eggs; Echo surveys; Seasonal variations; Geographical distribution; Http://aims.fao.org/aos/agrovoc/c_5083.
Ano: 2006
URL: http://hdl.handle.net/1834/1847

Contribución al estudio de las bacterias halofílicas en el mar ecuatoriano
Provedor de dados: 20
Autores: Villamar, F.
Durante los meses de marzo y abril de 1976, se realizó el estudio de las bacterias marinas en el mar ecuatoriano, las cuales sobrepasan densidades de 10 Bact./ml en el área océanica. Al mismo tiempo frente a las costas del Ecuador disminuyen estos valores entre 500 y 2.500 Bact./ml., excepto en el área del Golfo de Guayaquil, donde se encontró bacterias de origen continental en un gran parche de 106 bact./ml. de acuerdo al diagnóstico bioquímico diferencial, se trata de Bacilos Grammegativos semejantes a pseudomonas sp. y Alcalígenas sp. en la zona océanica y Micrococcus sp. frente al Golfo de Guayaquil. Se relacionan las bacterias halofílicas con la temperatura, oxígeno y salinidad superficial.
Tipo: Journal Contribution
Palavras-chave: Nannoplankton; Bacteria; Abundance; Bacteria; Http://aims.fao.org/aos/agrovoc/c_765.
Ano: 1987
URL: http://hdl.handle.net/1834/2139

Inventaire et abondance relative des gastéropodes dans les zones marines côtières de Monastir (est-Tunisien)
Provedor de dados: 20
Autores: Ouannes-Ghorbel, A.; Guirah. J.; Boukrayaa, M.; Elhasni, K.; Derbali, A.
La présente étude constitue une première tentative pour la connaissance des Gastéropodes dans les zones marines côtières de Monastir (Sayada, Tboulba et Elbkalta).  L’échantillonnage a été réalisé dans ces zones durant les mois de mai et juin 2006. Au total, 23 stations de 5 à 20 mètres ont été prospectées. Les prélèvements ont été effectués au moyen d’une benne Van Veen ; le contenu est tamisé sur maille de 2 mm de côté. Après traitement des échantillons, 29 espèces de Gastéropodes ont été identifiées avec une dominance de deux espèces : Tricolia speciosa et Smaragdia viridis. En revanche, nous avons noté la pauvreté de la zone prospectée en Mollusques Bivalves et également en espèces ayant une valeur commerciale dans la zone d’étude notamment la palourde...
Tipo: Journal Contribution
Palavras-chave: Abundance; Check lists; Commercial species; Dominant species; Geographical distribution; Grabs; Inventories; Marine molluscs; Marine fisheries.
Ano: 2009
URL: http://hdl.handle.net/1834/4492

Estudio de la comunidad fitoplanctónica en el estuario interior de Esmeraldas, Ecuador durante mayo de 2002
Provedor de dados: 20
Autores: Tapia, M.E.
El presente trabajo tiene por finalidad determinar la composición, abundancia y distribution de las especies que se encuentran en los ríos de la ciudad de Esmeraldas.
Tipo: Journal Contribution
Palavras-chave: Chlorophylls; Phytoplankton; Abundance; Diatoms; Species diversity; Cell counters; Estuaries; Community composition; Distribution; Phytoplankton; Estuaries; Distribution; Chlorophylls; Diatoms; Species diversity; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_2673; Http://aims.fao.org/aos/agrovoc/c_35773; Http://aims.fao.org/aos/agrovoc/c_1577; Http://aims.fao.org/aos/agrovoc/c_32657; Http://aims.fao.org/aos/agrovoc/c_33954.
Ano: 2003
URL: http://hdl.handle.net/1834/2402

Evaluación directa del langostino colorado y langostino amarillo entre la II y VIII Regiones, año 2003
Provedor de dados: 20
Autores: Leiva, B.; Canales, C.; Barbieri, M.A.; Cortez, J.; Quiroz, J.C.; Arana, P.; Guerrero, A.; Ahumada, M.; Melo, T.; Queirolo, D.; Hurtado, C.; Gálvez, P.; Molina, E.
El Proyecto FIP 2003-31 contempló cruceros de prospección los cuales fueron desarrollados en el período comprendido entre el 17 de agosto y el 27 de septiembre de 2003 y cuyo fin estuvo dirigido a la estimación, mediante evaluación directa, del nivel de biomasa y abundancia del langostino colorado (Pleuroncodes monodon) y langostino amarillo (Cervimunida johni) entre las Regiones II y VIII
Tipo: Report
Palavras-chave: Stock assessment; Crustacean fisheries; Biomass; Abundance; Stock assessment; Biomass; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_926.
Ano: 2004
URL: http://hdl.handle.net/1834/1733

Abundancia, reproducción y distribucion de tallas del gatuzo Mustelus schmitti en la Zona Comun de Pesca Argentino-Uruguaya y en el Rincón. Noviembre, 1994
Provedor de dados: 20
Autores: Cousseau, M.B.; Carozza, C.R.; Macchi, G.J.
Relative abundance, length distributions and reproductive condition of Mustelus schmitti are analyzed with samples obtained in the cruise H-13/94. Our results are compared with those obtained in other cruises. The samples were collected in the Argentine-Uruguayan Common Fishing Zone (AUCFZ) and El Rincón (Buenos Aires Prov., Argentina).
Tipo: Journal Contribution
Palavras-chave: Abundance; Reproduction; Fishery surveys; Size distribution; Reproduction; Http://aims.fao.org/aos/agrovoc/c_6507.
Ano: 1998
URL: http://hdl.handle.net/1834/2475

Estudio de la distribución y diversidad de los poliquetos bentónicos en las Islas Galápagos, Sept./Oct. de 1999
Provedor de dados: 20
Autores: Villamar, F.
Esta investigación tiene como propósito el de identificar las especies de los poliquetos bentónicos y conocer la actividad biológica de estos organismos marinos en las diferentes bahías y puertos en el área del Archipiélago de Galápagos, con la finalidad de determinar la composción, distribución y abundancia de cada uno de ellos y sus asociaciones existentes en la zona estudiada, durante el segundo Crucero de la Armada del Ecuador a bordo del B7I "ORION" entre septiembre y octubre de 1999.
Tipo: Journal Contribution
Palavras-chave: Distribution; Marine organisms; Marine invertebrates; Benthos; Aquatic communities; Biodiversity; Composition; Abundance; Cruises; Oceanic islands; Benthos; Distribution; Aquatic communities.
Ano: 2000
URL: http://hdl.handle.net/1834/2269

Variación interanual del mesozooplancton en la plataforma bonaerense en primavera: introducción de nuevas metodologías para su análisis
Provedor de dados: 20
Autores: Di Mauro, R.
The distribution and abundance of mesozooplankton (specially copepod, cladoceran and appendicularian species) of the Buenos Aires shelf obtained in spring, during the years 2002, 2003 and 2004, were analysed. A small bongo net provided with 67 and 220 µm meshes, was employed in order to obtain a complete representation of the size spectrum of the mesozooplankton. The analysis included both the traditional optical method and the a new automatic image analysis (ZooImage). The results were related with the oceanographic conditions, which were, in general similar to the mean conditions for the study area. The finer mesh (67 µm) allowed a more accurate estimation of the abundance and biomass of small copepod species ( 1mm total length), producing the tick mesh...
Tipo: Theses and Dissertations
Palavras-chave: Zooplankton; Abundance; Biomass; Annual variations; Fish larvae; Imaging techniques; Oceanographic data; Environmental conditions; Salinity; Temperature; Water masses.
Ano: 2011
URL: http://hdl.handle.net/1834/4204

Preferencia y rangos de tolerancia a la temperatura y salinidad de los pterópodos y heterópodos frente a la costa ecuatoriana
Provedor de dados: 20
Autores: Cruz, M.
Del análisis de 216 muestras de zooplancton, obtenidos mensualmente desde 1990 hasta el 2007, en la estación fija a 10 millas de la costa ecuatoriana, frente a Salinas, Ecuador, se identificaron 14 especies de gasterópodos planctónicos (Pterópodos y heterópodos) a los que se le analizaron la preferencia de las masas de aguas y sus rangos de tolerancia a la temperatura y salinidad en el mar. Los registros mensuales de la temperatura y salinidad superficial del agua, fueron relacionados con la abundancia de cada especie en un diagrama T-S (Temperatura y Salinidad) donde se observa la distribución y preferencia de la especie, mientras que en una tabla con las temperaturas y salinidades mínimas y máximas registradas mensualmente en la estación fija, se...
Tipo: Journal Contribution
Palavras-chave: Temperature tolerance; Salinity tolerance; Water masses; Abundance; Distribution; Marine molluscs; Fixed stations.
Ano: 2012
URL: http://hdl.handle.net/1834/4706

Variaciones temporales del phylum quetognatos en las estaciones fijas La Libertad y Manta, Ecuador durante el evento El Niño 1997-1998 y años 2002-2003
Provedor de dados: 20
Autores: Naranjo, Ch.
El presente estudio se desarrolló mediante muestreos mensuales de zooplankton en las estaciones fijas La Libertad y Manta localizadas a 10 y 8 millas costa afuera respectivamente. Se analizaron un total de 150 muestras de zooplankton en La Libertad y Manta durante 1997-1998 considerado un evento El Niño extraordinario y en los años 2002-2003, período que presentaron condiciones oceanográficas de inestabilidad. La prueba estadística determinó que existen cambios temporales en los patrones de distribución y abundancia en las especies de Quetognatos, aceptándose la hipótesis nula, el cual estuvo influenciado por las condiciones oceanográficas y época estacional, siendo más notorio en la estación fija La Libertad durante el período en estudio. El índice de...
Tipo: Journal Contribution
Palavras-chave: Temporal variations; Zooplankton; Abundance; Species diversity; Zooplankton; Species diversity; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_33954.
Ano: 2009
URL: http://hdl.handle.net/1834/3357

Estudio de la macrofauna bentónica en Bahía Chile y Ensenada Guayaquil (Isla Greenwich, Antártica).
Provedor de dados: 20
Autores: Calderón, T.; Jaramillo, S.
Durante la VII Expedición Antártica Ecuatoriana (Verano austral 1998), se tomaron un total de 4 muestras de sedimentos en los fondos de la Bahía Chile y 7 en la Ensenada Guayaquil, utilizando una draga tipo Van Veen de capacidad de 0.1m2. Los taxones más representativos de la macrofauna bentónica fueron Poliquetos con 13 familias, Anfípodos 7 familias y el filo nemátodos. Se identificó a nivel de familia los Poliquetos y Anfípodos. Como fauna acompañante se obtuvo un total de 15 taxas bentónicas representados por 8 filos. Las familias más abundantes de poliquetos en Bahía Chile fueron Capitellidae con 37.38% y Spionidae con 17.89%. Además se reconocieron 4 familias de Anfípodos, de las que Phoxocephalidae representó el 57.89% el total de dicho grupo. En la...
Tipo: Journal Contribution
Palavras-chave: Benthos; Distribution; Abundance; Taxa; Benthos; Distribution; Taxa; Http://aims.fao.org/aos/agrovoc/c_878; Http://aims.fao.org/aos/agrovoc/c_35773; Http://aims.fao.org/aos/agrovoc/c_7624.
Ano: 1998
URL: http://hdl.handle.net/1834/3853

Composición y abundancia del macrozooplancton e ictioplancton en el Estrecho Bransfield, durante el verano austral 1998
Provedor de dados: 20
Autores: Ortega, D.
Durante la realización de la VII Expedición Antártica Ecuatoriana, efectuada entre diciembre de 1997 y marzo de 1998. Se realizó un crucero oceanográfico en el Estrecho Bransfield a bordo del Bae/Orión, colectándose muestras de macrozooplancton obtenidas por arrastres oblicuos con redes tipo bongo de 500μ hasta una profundidad de 300 m. Este estudio se efectuó con el fin de conocer la distribución y composición del macrozooplancton e ictioplancton en el Estrecgo Bransfield. La biomasa zooplanctónica, registró la mayor concentración 6 913 org.(1000m3)-1, cercano al área de la plataforma Antártica (Península Antártica), donde la temperatura fue de (-1° C). De los organismos zooplanctónicos identificados, las salpas con 62%, copépodos 9% eufáusidos 8%, fueron...
Tipo: Journal Contribution
Palavras-chave: Composition; Distribution; Abundance; Zooplankton; Ichthyoplankton; Cruises; Distribution; Zooplankton; Http://aims.fao.org/aos/agrovoc/c_35773; Http://aims.fao.org/aos/agrovoc/c_15490.
Ano: 1998
URL: http://hdl.handle.net/1834/3854

Moluscos bivalvos de la plataforma continental de Manabí, Ecuador
Provedor de dados: 20
Autores: Cruz, M.
El presente estudio tiene como propósito principal el dar a conocer las especies de bivalvos de la plataforma superior interna de la Provincia de Manabí; relacionándolos con la profundidad, tipo de sedimento, parámetros químicos, abundancia relativa y distribución de estos organismos. Considera que la información recopilada a través de estos trabajos, permitirá tener el cuadro referencial de las condiciones bióticas y abióticas de los bivalvos marinos de la plataforma superior interna de la Provincia de Manabí.
Tipo: Journal Contribution
Palavras-chave: Marine molluscs; Geographical distribution; Abundance; Geographical distribution; Http://aims.fao.org/aos/agrovoc/c_5083.
Ano: 1987
URL: http://hdl.handle.net/1834/2135

Comunidades del plancton en la Caleta Aeolian de la Isla Baltra - Galápagos (Ecuador), durante 2005
Provedor de dados: 20
Autores: Naranjo, Ch.; Tapia, M.E.
El propósito del trabajo es determinar la composición, abundancia de los grupos dominantes del fitoplancton y zooplancton, establecer las especies de Quetognatos y su relación con la temperatura superficial del mar durante marzo de 2005 correspondiente a la época húmeda.
Tipo: Journal Contribution
Palavras-chave: Plankton; Primary production; Biological production; Phytoplankton; Zooplankton; Biomass; Abundance; Community composition; Fish eggs; Surface temperature; Plankton; Primary production; Biological production; Phytoplankton; Zooplankton; Biomass; Http://aims.fao.org/aos/agrovoc/c_5950; Http://aims.fao.org/aos/agrovoc/c_34329; Http://aims.fao.org/aos/agrovoc/c_36649; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_926.
Ano: 2007
URL: http://hdl.handle.net/1834/2346

El rol del frente de mareas de Península Valdés en el control de la comunidad zooplanctónica
Provedor de dados: 20
Autores: Derisio, C.
The Península Valdés tidal front was studied in its rol in the control of the spatial distribution, abundance, assemblages, diversity and life histories of the zooplankton community using samples from two oceanographic surveys. Although the front showed in general high zooplankton abundances, highest values, mainly due to the presence of immature stages of copepods, were recorded in the transitional and stratified zones coinciding with highest values of chlorophyll a. The zooplankton groups showed a distinctive spatial distribution across the front. The results showed that this front did not exert any control on zooplankton composition and diversity, but did on the abundance. In the homogeneous zone the harpacticoid copepods were more abundant, followed by...
Tipo: Theses and Dissertations
Palavras-chave: Zooplankton; Ecological associations; Oceanic fronts; Abundance; Species diversity; Hydrography; Vertical migrations; Copepoda; Cladocera; Marine environment.
Ano: 2012
URL: http://hdl.handle.net/1834/4777

Biomasa y distribución espacial del bacterioplancton en el sector norte de la plataforma continental argentina (34º S-41º S)
Provedor de dados: 20
Autores: Hozbor, M.C.; Hernández, D.R.; Cucchi Colleoni, A.D.; Costagliola, M.C.; Peressutti, S.R.
The northern sector of the Argentine continental shelf (34º S-41º S) is a highly productive area that sustains important fishery resources like Argentine anchovy (Engraulis anchoita) and is characterized by the presence of frontal zones with retention of detritus and plankton. In marine environments the bacterioplankton represents one of the main components of the trophic nets and plays a key role in biogeochemical cycles. In this ecosystem biomass and bacterioplankton distribution as well as their relation to environmental variables were analyzed. The highest chlorophyll a values, not significantly related to bacterioplankton (p &gt; 0.05), were found in frontal and coastal areas. Abundance, bacterial biomass and cell volume values ranged 0.48-5.42 x 106...
Tipo: Journal Contribution
Palavras-chave: Picoplankton; Bacteria; Biomass; Fronts; Coastal zone; Abundance; Environmental factors; Geographical distribution.
Ano: 2013
URL: http://hdl.handle.net/1834/5498

Pesca comercial de merluza al sur de 41°S y estimación de índices de abundancia derivados de la flota pesquera
Provedor de dados: 20
Autores: Irusta, G.; Pérez, M.; Renzi, M.A.; Castrucci, R.
The activity of fishing fleets for hake Merluccius hubbsi south of 41°S Argentine Sea, SW Atlantic, is described. In order to establish the standard group of vessels, density indices derived from research cruises and ice-chilling fleets were related. Group four 1,400-1,800 HP related better to the abundance trend. Also, two series of indices associated to different fractions of the population were estimated: juveniles  age 2) and adults age 3-5. Finally, a total catch per unit effort CPUE for the region south of 41°S, which showed a declining trend during the period considered 1991-1997, was calculated.
Tipo: Journal Contribution
Palavras-chave: Commercial fishing; Gadoid fisheries; Catch/effort; Abundance; Fishing vessels statistics.
Ano: 2003
URL: http://hdl.handle.net/1834/2420

Índice de abundancia del grupo merluza de edad 2 en el área de cría patagónica. Período 1995-1998
Provedor de dados: 20
Autores: Castrucci, R.; Aubone, A.; Pérez, M.; Renzi, M.A.
An abundance index of hake Merluccius hubbsi individuals age 2 was estimated in the nursery area south of 41°S Argentine Sea, SW Atlantic. The analysis comprised the 1995-1998 period and was made with data derived from research surveys programmed to that end. A mean value estimator of CPUE catch in number of individuals per trawl hour based on delta distribution was used. The spatial distribution of CPUE of age groups 1 and 2 in the area surveyed, total length distribution per survey and the corresponding age composition are presented. The declining trend of abundance index of hake age 2 observed during the four year period amounted to 52.9.
Tipo: Journal Contribution
Palavras-chave: Nursery grounds; Juveniles; Abundance; Stock assessment; Gadoid fisheries; Stock assessment; Nursery grounds; Juveniles; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_25438; Http://aims.fao.org/aos/agrovoc/c_25393.
Ano: 2003
URL: http://hdl.handle.net/1834/2477

Evaluación acústica de recursos pesqueros pelágicos frente a la costa sur ecuatoriana durante septiembre de 1995
Provedor de dados: 20
Autores: Chalen, X.; Vicuña, H.
Nineteen lightday rectangular transects were made 16 in the area of the Gulf of Guayaquil (Ecuador), and 3 in an oceanic area at the west of the Gulf of Guayaquil, this was the second part of research cruise, oriented to the evaluation of the small pelagic fish stocks, it was made between september 14th and 27th, 1995. The SIMRAD EK-500 acoustic system was used, installed on board of the National Research Institute (INP) R/V Tohallí. At the same time, people from the INP's Fisheries Observer Program were on four private enterprises vessels, while they were fishing in the same Gulf's area. They also made the biological sample of the commercial catch, for future relation with the results from the acoustic evaluation. The V/R Tohallí principal catch was jack...
Tipo: Journal Contribution
Palavras-chave: Geographical distribution; Abundance; Demersal fisheries; Fishery resources; Continental shelves; Echo surveys; Geographical distribution; Demersal fisheries; Fishery resources; Continental shelves; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_2173; Http://aims.fao.org/aos/agrovoc/c_2942; Http://aims.fao.org/aos/agrovoc/c_32413.
Ano: 1996
URL: http://hdl.handle.net/1834/2962

Vertical shallow reef fishes from Malpelo island: abundance and distribution
Provedor de dados: 20
Autores: Chasqui Velasco, Luis; Gil Agudelo, Diego L.; Nieto, Ramón.
Las especies de peces endémicos de la isla Malpelo han sido poco estudiadas, al punto que no se cuenta con información sobre sus densidades y preferencias de hábitat. Mediante censos visuales se estudió la distribución y abundancia de las especies de peces arrecifales endémicos de Malpelo. Las especies más abundantes fueron Axoclinus rubinoffi (0.18 peces/m2) y Lepidonectes bimaculatus (0.08 peces/m2). La mayor abundancia se encontró en el Bajo de Junior y en relación con sustrato rocoso cubierto con algas coralináceas incrustantes.
Tipo: Journal Contribution
Palavras-chave: Endemic species; Marine fish; Abundance.
Ano: 2011
URL: http://hdl.handle.net/1834/4419

Distribución de huevos, larvas y prerreclutas de merluza (Merluccius hubbsi) en la Zona Común de Pesca Argentino-Uruguaya. Período 1999-2001
Provedor de dados: 20
Autores: Machinandiarena, L.; Brown, D.R.; Ehrlich, M.D.; Pájaro, M.; Dorado, J.; Teso, V.
Distribution and abundance of eggs, larvae and prerecruit stages of Merluccius hubbsi were evaluated to examine spawning, nursery and settlement areas in the Argentine-Uruguayan Common Fishing Zone during the 1999-2001 period. Larvae and prerecruit stages were more abundant at stations from 50 m to 100 m depth. The nursery area would extend from the 50 m isobath south of 37° S to the 200 m isobath northward where the shelf becomes narrower. In the whole sampling area small size prerecruits were caught; therefore, the whole zone should be considered as a potential settlement area.
Tipo: Journal Contribution
Palavras-chave: Fish larvae; Fish eggs; Larval settlement; Nursery grounds; Spawning grounds; Abundance; Fish larvae; Nursery grounds; Spawning grounds; Http://aims.fao.org/aos/agrovoc/c_2924; Http://aims.fao.org/aos/agrovoc/c_25438; Http://aims.fao.org/aos/agrovoc/c_7277.
Ano: 2006
URL: http://hdl.handle.net/1834/2512

Distribución espacial, abundancia y relación con características del hábitat del Caracol pala Eustrombus gigas (Linnaeus) (Mollusca: Strombidae) en el Archipiélago Nuestra Señora del Rosario, Caribe colombiano
Provedor de dados: 20
Autores: Gómez-Campo, Kelly; Rueda, Mario; García-Valencia, Carolina.
Se evaluó la densidad poblacional y distribución espacial de Eustrombus gigas (Linnaeus) en el archipiélago Nuestra Señora del Rosario, así como su asociación a diferentes hábitats, a partir del muestreo sistemático de 184 estaciones en dos épocas climáticas, húmeda (mayo-noviembre) y seca (diciembre-abril) que coinciden con el período reproductivo de la especie. En cada estación se contaron y midieron los individuos presentes en un área circular de 1256.6 m2 mediante buceo autónomo, a la vez que se hicieron observaciones in situ sobre los tipos de hábitats presentes. La densidad promedio (± DE) fue baja comparada con otras regiones del Caribe, 4.0 ind/ha ±10.8 y 3.7 ind/ha ±9.3, para las épocas húmeda y seca, respectivamente. Los individuos adultos,...
Tipo: Journal Contribution
Palavras-chave: Abundance; Marine molluscs.
Ano: 2010
URL: http://hdl.handle.net/1834/3742

Inventario, abundancia y distribución espacial de mamíferos marinos y aves en las Islas Galápagos durante el Crucero Oceanográfico (BAE Orión) en abril 2009: Implicaciones para conservación
Provedor de dados: 20
Autores: Jiménez, P.J.; Torres, S.; Alava J.J.; Samaniego, J.
Durante el crucero oceanográfico realizado del 02 al 23 de abril del 2009 a bordo del BAE Orión, se realizaron observaciones de campo para conocer las especies, abundancia y distribución espacial de mamíferos marinos y aves marinas de la costa ecuatoriana e Islas Galápagos. Se realizó un total de 90 avistamientos y 11 especies confirmadas de mamíferos marinos. Entre las especies de cetáceos observadas con su tamaño promedio grupal fueron: ballena azul (Balaenoptera musculus), la ballena piloto (Globicephala macrorhynchus), el cachalote (Physeter macrocephalus), el delfín de Fraser (Lagenodelphis hosei), el delfín común (Delphinus delphis), delfín listado (Stenella coeruleoalba), el delfín manchado pantropical (Stenella attenuata) y el delfín naríz de...
Tipo: Journal Contribution
Palavras-chave: Marine mammals; Marine birds; Geographical distribution; Abundance; Upwelling; Cruises.
Ano: 2010
URL: http://hdl.handle.net/1834/4226

Relación fitoplancton-zooplancton en el Pacífico Ecuatorial (Ecuador), durante septiembre 2001
Provedor de dados: 20
Autores: Torres, G.; Mero, M.; Calderón, T.; Franco, V.; Salazar, E.
El presente trabajo es una contribución al conocimiento de la bio-oceanografía del mar ecuatoriano, forma parte del proyecto de Monitoreo de las condiciones oceanográficas en el mar ecuatoriano y su relación con eventos de El Niño, realizadas en el B/I ORION del Instituto Oceanográfico de la Armada (INOCAR) en septiembre-octubre 2001, como un aporte a la comunidad científica.
Tipo: Journal Contribution
Palavras-chave: Phytoplankton; Diatoms; Zooplankton; Biological production; Upwelling; Population density; Cruises; Abundance; Geographical distribution; Biological production; Geographical distribution; Phytoplankton; Zooplankton; Population density; Diatoms; Http://aims.fao.org/aos/agrovoc/c_36649; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_6112; Http://aims.fao.org/aos/agrovoc/c_32657.
Ano: 2004
URL: http://hdl.handle.net/1834/2297

Factores oceanográficos relacionados con la abundancia relativa de anchoíta (Engraulis anchoita) sobre la plataforma bonaerense (34°S-41°S) durante la primavera
Provedor de dados: 20
Autores: Martos, P.; Hansen, J.E.; Negri, R.M.; Madirolas, A.
Research has been conducted to study the relationship between some physical variables and the relative abundance of the northern stock of the Argentine anchovy (Engraulis anchoita) within the main area of distribution of the stock during springtime. Basic data were recorded during four research surveys mainly aimed at the acoustic assessment of the stock between 34°S and 41° 30'S (Buenos Aires prov., Argentina - Uruguay). The cruises were always carried out in October from 1993 to 1996. Several environmental variables were simultaneously input into a General Linear Model to analyze the variations on fish abundance; however, the model did not account for more than 17-20% of the total variance. Nevertheless most of those factors (sea surface temperature,...
Tipo: Journal Contribution
Palavras-chave: Clupeoid fisheries; Seasonal distribution; Abundance; Stocks; Fronts; Salinity gradients; Stocks; Http://aims.fao.org/aos/agrovoc/c_28772.
Ano: 2005
URL: http://hdl.handle.net/1834/1559

Composición y distribución de la abundancia relativa de zooplancton en el Estrecho Bransfield (Antártica) durante el verano austral de 1987-1988
Provedor de dados: 20
Autores: Arcos, F.; Bonilla, M.A.
En el presente trabajo se analizan cuantitativamente y cualitativamente los componentes del zooplancton colectado en 23 estaciones del Estrecho Bransfield, determinando la distribución de la abundance relativa de cada grupo. Se nota una mayor abundancia de zooplancton al norte del estrecho y un predominio de Copépodos y Eufáusidos; estos últimos fueron recolectados principalmente en estadíos larvarios, y la presencia de gran cantidad de huevos en el extremo sur-oriental del estrecho sugiere un aporte de estos organismos provenientes del mar de Weddell.
Tipo: Journal Contribution
Palavras-chave: Zooplankton; Abundance; Distribution records; Antarctic zone; Zooplankton; Http://aims.fao.org/aos/agrovoc/c_15490.
Ano: 1989
URL: http://hdl.handle.net/1834/3827

Biologie, abondance et cartographie de deux espèces de bivalves : l’huitre perlière &lt;Pinctada radiata&gt; et la coque glauque &lt;Cerastoderma glaucum&gt; dans le golfe de Gabes
Provedor de dados: 20
Autores: Derbali, Abdelkarim.
The pearl oyster Pinctada radiata and the cockle Cerastoderma glaucum are among the most abundant bivalve molluscs in southern Tunisian waters. These species are not currently subject to any investigation despite their important economic value in the world. For this reason, their biological parameters, their spatial distribution and their stock assessment were undertaken in the Gulf of Gabes. The reproductive cycle was studied in relation to variations of the environment parameters. The specimens were collected monthly during one year (2007) in sites of El Kraten and El Jorf (Kerkennah Islands) for the first species and sites of Sidi Mansour and El Hicha (North of Sfax and Gabes) for the second. An intraspecific polymorphism biometric trait for P. radiata...
Tipo: Theses and Dissertations
Palavras-chave: Abundance; Biology; Shellfish.
Ano: 2011
URL: http://hdl.handle.net/1834/5404

Revisión y síntesis de las estimaciones acústicas de abundancia de anchoíta (Engraulis anchoita) efectuadas entre 1993 y 2008
Provedor de dados: 20
Autores: Madirolas, A.O.; Hansen, J.E.; Cabreira, A.G.
The annual research planning of the Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP, Mar del Plata, Argentina) includes at least two surveys to estimate the total biomass of Argentine anchovy Northern and Southern stocks. The assessment is performed using hydroacoustic techniques and the Daily Egg Production Method. In this paper the results of the acoustic estimates obtained during the 1993-2008 period are summarized. Besides, the studies performed to determine the characteristics of the species behavior such as vertical migrations or avoidance reactions to vessels that would produce uncertainty about estimates absolute value are discussed.
Tipo: Journal Contribution
Palavras-chave: Pelagic fisheries; Stocks; Echo surveys; Echo integrators; Abundance.
Ano: 2013
URL: http://hdl.handle.net/1834/5493

Estudio de la composición específica, abundancia y distribución espacial del microzooplancton (protozoos y micrometazoos) en el estuario del Río de la Plata (Argentina-Uruguay)
Provedor de dados: 20
Autores: Kogan, M.
Species composition, abundance and spatial distribution of microzooplancton (20-200 km)from the Río de la Plata Estuary, Argentina-Uruguay, SW Atlantic (36°S 56°W)were studied from samples collected during two oceanographic cruises at the end of austral spring (in 1999 and 2001)across a gradient from fluvial to coastal waters (200 km). Heterotrophic dinoflagellates, aloricate ciliates, tintinnids, radiolarians, rotifers and copepod nauplii were found. More than 110 taxa were registered, 35 were new records for the area. Three microzooplanktonic assemblages were distinguished using cluster analysis. Species and groups spatial distribution (horizontal and vertical)was related to the distribution of the maxima gradients (salinity, turbidity, etc.), estuarine...
Tipo: Theses and Dissertations
Palavras-chave: Zooplankton; Abundance; Geographical distribution; Salinity stratification; Ecological associations; Brackishwater environment; Community composition; Vertical distribution; Zooplankton; Geographical distribution; Ecological associations; Brackishwater environment; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_32845; Http://aims.fao.org/aos/agrovoc/c_1050.
Ano: 2005
URL: http://hdl.handle.net/1834/2598

Análisis de la distribución y abundancia del ictioplancton en el Golfo San Matías en setiembre de 1993
Provedor de dados: 20
Autores: Rodríguez Gil, S.G.; Serafini, R.; Bordino, P.
Tipo: Theses and Dissertations
Palavras-chave: Ichthyoplankton surveys; Fish larvae; Fish eggs; Abundance; Fish larvae; Http://aims.fao.org/aos/agrovoc/c_2924.
Ano: 1994
URL: http://hdl.handle.net/1834/3875

Evaluación hidroacústica del reclutamiento de anchoveta y sardina común entre la V y X Regiones, año 2004
Provedor de dados: 20
Autores: Castillo, J.; Saavedra, A.; Gálvez, P.; Núñez, S.; Ortiz, J.; Torres, P.; Véjar, F.; Molina, E.; Cerna, F.; López, A.A.; Bustos, L.
Se presentan los resultados de la evaluación acústica de biomasa, abundancia y distribución espacial; oferta ambiental de alimentos y las condiciones oceanográficas físicas asociadas a la anchoveta y sardina común en el período de reclutamiento de enero del año 2005 en la zona centro-sur.
Tipo: Report
Palavras-chave: Stock assessment; Biomass; Abundance; Geographical distribution; Environmental conditions; Echo surveys; Stock assessment; Biomass; Geographical distribution; Environmental conditions; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_32980.
Ano: 2005
URL: http://hdl.handle.net/1834/1748

Biología, ecología y explotación de la raya platana Atlantoraja platana (Günther, 1880), (Chondrichthyes, Rajidae), del golfo San Matías
Provedor de dados: 20
Autores: Coller, N.M.
La “raya platana” (Atlantoraja platana), es una especie endémica del Atlántico Sudoccidental, habita desde los 22º S (Uruguay y sur de Brasil) hasta los 42º S, región del Golfo San Matías (Argentina). El área de estudio del presente trabajo fue el Golfo San Matías (41º- 42º S y 64º- 65º O). El material analizado (778 hembras y 709 machos) fue colectado durante muestreos mensuales de las capturas desembarcadas por los barcos pesqueros de la flota local (muestreos de desembarque); muestras extraídas a bordo de las embarcaciones pesqueras por el programa de observadores a bordo, durante los años 2004 y 2005 y los meses de marzo, abril y mayo de 2006; y durante la realización de campañas de investigación pesquera (primavera de 2004, 2005 y 2006). Se describió...
Tipo: Theses and Dissertations
Palavras-chave: Fishery biology; Ecology; Feeding behaviour; Age (biological); Growth; Coastal environment; Morphology (animal); Reproduction (biology); Spatial distribution; Population dynamics; Abundance.
Ano: 2012
URL: http://hdl.handle.net/1834/5235

Pleuronectiformes de importancia comercial del Atlántico Sudoccidental, entre los 34°30' y 55°S. Distribución y consideraciones sobre su pesca
Provedor de dados: 20
Autores: Fabré, N.N.; Diaz de Astarloa, J.M.
Catch records of flatfishes obtained in exploratory cruises and in the existing literature in the geographical area between 34°S and 55°S in the Western SOuth Atlantic were analyzed to elaborate maps of the distribution of the most common flatfish species in this area. Data from commercial fleet landings at Mar del Plata Harbor were used to analyze the distribution and areas of resource concentration. The flatfish most frequently found in this study area belong to three families: 1. Paralichthidae, with the species: Thysanopsetta naresi, Paralichthys orbignyanus, Paralichthys patagonicus, Paralichthys isoceles, Xystreurys rasile. 2.-Pleuronectidae, with the species: Oncopterus darwini. 3. Achiropsettidae with: Mancopsetta maculata, Mancopsetta milfordi,...
Tipo: Journal Contribution
Palavras-chave: Geographical distribution; Fishing grounds; Flatfish fisheries; Abundance; Geographical distribution; Fishing grounds; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_2947.
Ano: 1996
URL: http://hdl.handle.net/1834/1957

Los eufáusidos en el mar ecuatoriano como indicadores de masas de agua, durante el crucero oceanográfico CO-II-99. Septiembre-octubre de 1999
Provedor de dados: 20
Autores: Castañeda, P.
Se analiza la distribución, abundancia relativa y composición de especies del orden Euphausiacea en el mar ecuatoriano, en el período septiembre-octubre de 1999 (CO-II-99). De un total de 25047 org/1000m³ se identificaron las siguientes especies Nyctiphanes simplex; Euphausia distinguenda; E. diomedeae; E. tenera; Stylocheiron sp., S. carinatum; S. longicorne; Nematoscelis sp., N. gracilis; N. tenella; Nematobrachion flexipes y Thysanopoda orientalis. La información biológica obtenida se correlaciona con las condiciones físicas del océano observadas durante el período de estudio. Se destaca la abundancia de Nyctiphanes simplex, en el área de influencia de la Corriente de Humboldt. La distribución de las especies propias de aguas tropicales y subtropicales...
Tipo: Journal Contribution
Palavras-chave: Indicator species; Water masses; Distribution; Abundance; Composition; Cruises; Marine crustaceans; New records; Distribution; Indicator species; Http://aims.fao.org/aos/agrovoc/c_35773; Http://aims.fao.org/aos/agrovoc/c_35790.
Ano: 2000
URL: http://hdl.handle.net/1834/2275

Propuesta de estandarización del área barrida en campañas de investigación dirigidas a evaluar juveniles de merluza común Merluccius hubbsi
Provedor de dados: 20
Autores: Pérez, M.; Aubone, A.; Simonazzi, M.A.; Irusta, C.G.
Precision of abundance index estimation Merluccius hubbsi is directly related with the variability that normally occurs during the fishing operation and consequently in the geometry of the net duringeach haul. Some of these factors can be controlled, therefore the standardization of the sampling methodology avoids differences in the behaviour and 'work' of the net minimizing variations in the catchability between hauls. The acoustic equipment (SCANMAR) in there search vessels, allows to monitore the fishing operation during the trawl and to develop strategies in order to reduce the variability and to improve the precision of the estimations. The applicability of the methodology and there for the validity of the estimates indifferent cruises must be studied...
Tipo: Journal Contribution
Palavras-chave: Fishing operations; Abundance; Sampling; Fishery surveys; Eco surveys; Swept area.
Ano: 1998
URL: http://hdl.handle.net/1834/5786

Abondance relative et estimation de la biomasse des petits pélagiques des eaux tunisiennes
Provedor de dados: 20
Autores: Ben Abdallah, L.; Hattour, A.; Guennegan, Y.
Deux  campagnes de prospection sur les petits pélagiques s'inscrivant dans le cadre du Programme National Mobilisateur (PNM), "Evaluation de ressources pélagiques et démersales des eaux tunisiennes" (1996-1999) ont été menée en étroite collaboration avec l’Institut Français de Recherche et d’Exploitation de la Mer (IFREMER). Ces campagnes ont pour objectifs de préciser l'abondance relative des petits pélagiques et leur variabilité spatiaux-temporelles mais également de quantifier les potentiels exploitables des stocks des animaux aquatiques préalablement définis, et surtout de familiariser l’équipe des scientifiques tunisiens, aux méthodes numériques et informatiques utilisées en participant à la lecture des échogrammes et aux traitements des données des...
Tipo: Journal Contribution
Palavras-chave: Abundance; Biomass; Pelagic fisheries; Potential yield; Stock assessment; Biomass; Stock assessment; Pelagic fisheries; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_5659.
Ano: 2004
URL: http://hdl.handle.net/1834/1163

Monitoreo de las condiciones bio-oceanográficas entre la I y la IV Regiones, año 2004
Provedor de dados: 20
Autores: Braun, M.; Reyes, H.; Pizarro, E.; Castillo, J.; Saavedra, J.; Catasti, V.; Valenzuela, V.
El presente documento corresponde al informe final del proyecto FIP 2004-01, presentándose los resultados de las condiciones oceanográficas físico-químicas, la distribución geográfica y abundancia de huevos y larvas de los recursos anchoveta, sardina, jurel y caballa y su variabilidad estacional; y la distribución de los recursos detectados por medio de técnicas hidroacústicas  en la I y II Regiones, registradas durante los cruceros estacionales de monitoreo MOBIO 0406 y MOBIO 0408, realizados en otoño e invierno de 2004. Entrega además la serie de tiempo mensual generada producto de la ocupación de las estaciones costeras de vigilancia localizadas frente a los puertos de Mejillones, Iquique, y Arica para el período mayo 2004 – noviembre 2004 y la...
Tipo: Report
Palavras-chave: Oceanographic data; Geographical distribution; Fish eggs; Abundance; Cruises; Geographical distribution; Http://aims.fao.org/aos/agrovoc/c_5083.
Ano: 2005
URL: http://hdl.handle.net/1834/1844

El zooplancton de las Islas Galápagos
Provedor de dados: 20
Autores: Bonilla, D.
El presente trabajo es el resultado de un análisis cuali-cualitativo de 84 muestras de plancton colectadas en aguas costeras (10.-0 m de profundidad) en diez localidades de las Islas Galápagos entre Agosto de 1975 - Julio de 1976. Se da a conocer 29 grupos de organismos del zooplancton, determinándose que los grupos dominantes en las estaciones objeto de este estudio y en orden decreciente de su abundancia fueron: Copépodos, Pterópodos, Apendiculares, Quetognatos, Decápodos y Huevos de Peces. Se hacen evaluaciones del volumen de plancton y de la cantidad de organismos del zooplancton. Se detrmina que la distribución del zooplancton fue poco homogénea en las localidades estudiadas. mayores concentraciones se registraron hacia la parte central del...
Tipo: Journal Contribution
Palavras-chave: Zooplankton; Coastal waters; Geographical distribution; Abundance; Zooplankton; Geographical distribution; Coastal waters; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_25205.
Ano: 1983
URL: http://hdl.handle.net/1834/2120

Estandarización de la captura de centollón (Paralomis granulosa) por trampa con distintos tiempos de pesca en el Canal Beagle, Argentina
Provedor de dados: 20
Autores: Firpo, C.; Wyngaard, J.; Iorio, M.I.
To standardize false king crab catch rates and transform them into abundance indices it is essential to count on a model that adequately describes the relation between catch per trap and fishing time. Considering data derived from research surveys carried out on board of the artisanal fleet in the Beagle Channel, assuming an asymptotic catch trend and absence of escape, to describe the relation an exponential model was applied. The Coo (asymptotic catch) and a (income rate) parameters of the model allowed to build a correction factor to transform the catches obtained with different fishing times into relative abundance indices. The model provides, besides, the optimum time to maximize catches. Para estandarizar las tasas de captura de centollón y...
Tipo: Journal Contribution
Palavras-chave: Fishing time; Trap nets; Catch statistics; Models; Fishery surveys; Abundance; Paralomis granulosa; Marine environment.
Ano: 2014
URL: http://hdl.handle.net/1834/5822

Moluscos bivalvos perforadores de rocas en la zona intermareal de la Provincia de Esmeraldas - Ecuador, 2002-2005
Provedor de dados: 20
Autores: Cruz, M.
Of the analysis of five rocky areas in the intertidal zone of the Esmeraldas province: Tachina, Balao, Súa-Atacames, Galera and Mompiche, from the limit of the high tide to the limit of the low tide, were founded nine (9) species of drilling bivalves molluscs, that belong to three families: Mytilidae, Petricolidae and Pholadidae. Petricola denticulata was the most abundant species in the Esmeraldas province and represents the 26.1% among all species, whiles the sites or stations that were observed the greater abundance of organisms were Balao and Súa-Atacames with 39.1% each one. The greater richness of species was observed in Súa-Atacames, having reprsented 50% of the total diversity. In Tachina station, drilling rock organism were not observed. The...
Tipo: Journal Contribution
Palavras-chave: Marine molluscs; Abundance; Species diversity; Drilling.
Ano: 2013
URL: http://hdl.handle.net/1834/5755

Nuevos registros de peces para la Isla de San Andrés (Mar Caribe de Colombia)
Provedor de dados: 20
Autores: Victoria-D., P.; Gómez-N., D.P.
Se incluyen 34 especies de peces, las cuales constituyen nuevos registros para la isla de San Andrés y 9 de éstas lo son para el oeste del Caribe. Se comenta la abundancia de las capturas obtenidas por los integrantes de la "Cooperativa de Pescadores Roos Carlos Baker" y se hacen algunas observaciones cuando fueron identificados durante buceos a pulmón libre. La presencia de cada especie se relaciona con el tipo de habitat.
Tipo: Journal Contribution
Palavras-chave: New records; Fish; Fishermen; Abundance; Fish; Fishermen; Http://aims.fao.org/aos/agrovoc/c_15903; Http://aims.fao.org/aos/agrovoc/c_2936.
Ano: 1984
URL: http://hdl.handle.net/1834/4037

Effectiveness of a Cuban  marine protected area in meeting multiple management objectives
Provedor de dados: 20
Autores: Angulo-Valdés, J. A.
In this work the management effectiveness of a Cuban MPA is assessed using an  interdisciplinary approach. A series of three hypotheses are tested to determine how  effective the Punta Frances Marine Protected Area (PFMPA) has been in meeting the  multiple objectives of conserving biological diversity and ecological integrity, while  allowing for the development of economic opportunities for tourism, and satisfying the  needs of local and distant human populations.     A new typology of benefits derived from MPAs was produced to provide managers with  a practical tool that enable them to: 1) identify the benefits at the early stages of MPA  creation, 2) state MPA objectives in a clear and measurable way, 3) assess the  effectiveness of their MPA in meeting...
Tipo: Theses and Dissertations
Palavras-chave: Protected areas; Methodology; Abundance.
Ano: 2005
URL: http://hdl.handle.net/1834/5483

Ecología y distribución de los moluscos bivalvos perforadores de rocas (Familia Mytilidae) en la costa ecuatoriana del 2000 al 2005
Provedor de dados: 20
Autores: Cruz, M.; Mair, J.
Del análisis de más de 90 muestreos realizados en la zona intermareal rocosa en 33 sitios de la costa Ecuatoriana, desde el año 2000 al 2005, se identificaron cuatro especies de moluscos bivalvos perforadores de rocas de la familia Mytilidae: Gregariella coarctata, Lithophaga aristata, Lithophaga (L) attenuata y Lithophaga hastasia. Lithophaga hastasia, es considerada "rara" está restringida para Perdenales-Chorrera en la Provincia de Manabí, no se volvió a encontrar en otro lugar de la costa Ecuatoriana, prefiriendo un ecosistema influenciado por aguas tropicales provenientes del norte del país. La especie Gregariella coarctata, se la considera "Común" prefiere la Provincia de Manabí entre Punta Bellaca y Manta, puede extenderse hacia el sur del Ecuador...
Tipo: Journal Contribution
Palavras-chave: Ecology; Marine molluscs; Fouling organisms; Distribution; Abundance; Ecology; Distribution; Http://aims.fao.org/aos/agrovoc/c_2467; Http://aims.fao.org/aos/agrovoc/c_35773.
Ano: 2009
URL: http://hdl.handle.net/1834/3368

Variación espacial y temporal de juveniles de Pinctada imbricata (Röding, 1798) y Argopecten nucleus (Born, 1778) en la región Norte del caribe colombiano
Provedor de dados: 20
Autores: Castellanos, C.; Campos, N.H.
Con el propósito de conocer la respuesta de juveniles de bivalvos frente a los cambios en la condición hidrográfica, fue evaluada la variación espacial (regiones, bahías y profundidades) y temporal (períodos climáticos) de la abundancia de Pinctada imbricata y Argopecten nucleus en la región norte del Caribe colombiano. Esta variación fue determinada en dos fases, a partir de la fijación de los individuos en colectores artificiales. La primera fase, entre 1994 y 1996 fue realizada en el Parque Nacional Natural Tayrona (PNNT) donde se comparó la abundancia de juveniles en Bahía Concha y Bahía Chengue a 5, 10, 15 y 20 m de profundidad; fueron establecidas diferencias entre los factores considerados; la mayor abundancia promedio a 5 m para Pinctada imbricata...
Tipo: Journal Contribution
Palavras-chave: Abundance; Juveniles; Juveniles; Http://aims.fao.org/aos/agrovoc/c_25393.
Ano: 2007
URL: http://hdl.handle.net/1834/3516

Uso de técnicas geoestadísticas en la estimación de la abundancia de vieira patagónica (Zygochlamys patagonica).
Provedor de dados: 20
Autores: Lasta, M.L.; Hernandez, D.R.; Bogazzi, E.; Burgos, G.; Valero, J.; Lucifora, L.O.
To evaluate absolute biomass, a research cruise was conducted on three scallop (Zygochlamys patagonica)beds (38°S-56°W, September 1998). The estimated bed surface was 1,162 nm(2). Sampling stations were regularly spaced at 5 nm intervals. A total of 118 trawls were performed with a non-selective dredge 2,5 m wide (efficiency 16-21. ). Trawls duration and speed were 10 minutes and 3 nm.h(-1)respectively. Samples were taken to estimate total and commercial (greater or equal than 55 mm total height)scallop weight and size frequency distribution. Coefficients of variation (CV)of the estimated biomass were calculated for each bed using geoestatistical techniques and a simple random sampling alternative with the same number of samples. The CVs for total scallop...
Tipo: Journal Contribution
Palavras-chave: Fishery surveys; Scallop fisheries; Biomass; Abundance; Biomass; Http://aims.fao.org/aos/agrovoc/c_926.
Ano: 2001
URL: http://hdl.handle.net/1834/1870

Estudio taxonómico preliminar de la ictiofauna de Bahía Malaga (Pacífico colombiano)
Provedor de dados: 20
Autores: Rubio-R., E.A.
Se presenta la composición taxonómica preliminar de la fauna ictiológica colectada entres estaciones de la Bahía de Málaga entre marzo de 1980 y marzo de 1981. Los resultados muestran la presencia dentro de la bahía de 123 especies y 84 géneros pertenecientes a 40 familias, la gran mayoría eurihalinas de origen marino. Las especies más abundantes en nuestras capturas fueron LUe stolifera (Clupeidae) y Eucinostomus californiensis (Gerreidae) y las familias Sciaenidae y Carangidae presentan el mayor número de especies. Se presentan los nombres vulgares locales, tallas y estaciones de colecta, así mismo para la mayoría de las especies colectadas se brindan las épocas de abundancia de juveniles dentro de la Bahía.
Tipo: Journal Contribution
Palavras-chave: Taxonomy; Fish; Size; Abundance; Taxonomy; Fish; Size; Http://aims.fao.org/aos/agrovoc/c_7631; Http://aims.fao.org/aos/agrovoc/c_15903; Http://aims.fao.org/aos/agrovoc/c_7093.
Ano: 1984
URL: http://hdl.handle.net/1834/4040

The abundance, biomass and composition of pelagic ciliates in East African lakes of different salinity and trophy
Provedor de dados: 20
Autores: Yasindi, A. W.; Taylor, W. D.
Planktonic ciliates were studied in 17 tropical East African lakes of different salinity and trophic status. Oligotrichs (e.g., Strombidium, Strobilidium and Halteria) and scuticociliates (e.g., Cyclidium, Pleuronema, Cristigera), dominated the ciliate communities. Conductivity and trophic status were the most important environmental variables influencing the distribution of ciliate species in East African lakes. Herbivorous oligotrichs were important in oligotrophic and mesotrophic lakes, as they are in temperate and subtropical lakes, but their importance decreased with increasing chlorophyll a concentration and conductivity. On the other hand, the importance of scuticociliates (primarily bacterivores) increased with increasing chlorophyll a and...
Tipo: Proceedings Paper
Palavras-chave: Freshwater lakes; Abundance; Biomass; Pelagic environment; Salinity; Plankton; Community composition; Oligotrophic lakes; Aquatic communities; Regression analysis; Tropical lakes; Species diversity; Plankton; Freshwater.
Ano: 2006
URL: http://hdl.handle.net/1834/5311

Size spectra, body width and morphotypes of intertidal nematodes: an ecological interpretation
Provedor de dados: 27
Autores: Tita, G.; Vincx, M.; Desrosiers, G.
Nematode species from three intertidal assemblages (St Lawrence Estuary, Quebec, Canada) were studied in order to form an ecological interpretation of three allometric attributes: body width, size spectra, and morphotypes. The three assemblages were characterized by a very similar sediment grain median (Md) but different silt-clay proportions: A1 (upper-tidal level; Md=122 µm; silt=34.8%), A3 (mid-tidal level; Md=182 µm; silt=12.8%), and A5 (lower-tidal level; Md=122 µm; silt=6.8%). Silt-clay proportions were an influential factor in determining the mean nematode body width, used as a morphological discriminant between burrowing and interstitial organisms. A plot of the number of species vs the body width-classes showed two peaks: between 19.3 and 22.6 µm...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abundance; Benthos; Biomass; Diversity; Meiobenthos; Transport.
Ano: 1999
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=7340

Paratenic hosts of the swimbladder nematode &lt;i&gt;Anguillicola crassus&lt;/i&gt;
Provedor de dados: 27
Autores: Thomas, B.; Ollevier, F.P.
The host specificity and population dynamics of &lt;i&gt;Anguillicola crassus&lt;/i&gt; in a number of paratenic hosts were investigated. Various freshwater fish species were sampled monthly (March 1990 to March 1991) from the Kolenhaven (Albertcanal, Genk, Belgium) and examined for L&lt;sub&gt;3&lt;/sub&gt;-larvae of &lt;i&gt;Anguillicola crassus&lt;/i&gt;. Sixteen species were found to be infected: all the physoclist species examined (&lt;i&gt;Gymnocephalus cernua, Lepomis gibbosus, Ictalurus nebulosus, Stizostedion lucioperca, Gasterosteus aculeatus, Oreochromis niloticus&lt;/i&gt; and &lt;i&gt;Perca fluviatilis&lt;/i&gt;) and those physostome species of which a sufficient number could be examined to detect the infection (&lt;i&gt;Gobio gobio, Leuciscus...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abundance; Endoparasites; Freshwater fish; Hosts; Introduced species; Parasites; Population dynamics; Specificity; Swim bladder; Anguillicola crassus; Pisces [Fish].
Ano: 1992
URL: http://www.vliz.be/imisdocs/publications/299068.pdf

Definitions of Biodiversity and Measures of Its Value
Provedor de dados: 31
Autores: Simpson,   R. David.
The destruction of natural habitats has prompted concerns about the loss of biological diversity. Regrettably, however, there is no consensus among either biologists or economists on the most meaningful measures of biodiversity. Fundamentally different definitions are useful in asking fundamentally different questions. Considerable attention has been given to the value of diversity in search models. A measure of "aggregate variability" is appropriate to such models. Values derived from search models tend to be well behaved; they exhibit diminishing returns in diversity. In contrast, a definition of diversity as "relative abundance" is more appropriate to more complex objective functions. Values derived in these models are not necessarily well behaved. The...
Tipo: Working or Discussion Paper
Palavras-chave: Biological diversity; Biodiversity; Diversity index; Abundance; Search; Variability; Consistency; Contingent valuation; Diminishing returns; Increasing returns; Environmental Economics and Policy; D43; D83; Q20.
Ano: 2002
URL: http://purl.umn.edu/10551

Lognormal abundance distribution of woody species in a cerrado fragment (São Carlos, southeastern Brazil)
Provedor de dados: 88
Autores: Oliveira,Fabiola Ferreira; Batalha,Marco Antônio.
The lognormal distribution model is frequently found in communities, especially those which are rich in species and influenced by many environmental factors, as those of the cerrado. We tested the hypothesis that the abundance distribution of woody plant species in a cerrado fragment fits the lognormal model. We placed 20 lines in a cerrado fragment and sampled, with the point-quarter method, 800 individuals with stem perimeter equal or larger than 3 cm. We plotted the abundance-class histogram of the species, verified its normality with the Kolmogorov-Smirnov test, and estimated the expected number of woody species for this community. Of the 63 obtained species, Anadenanthera falcata (with 185 species), Eriotheca gracilipes (43), Stryphnodendron obovatum...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abundance; Cerrado; Lognormal distribution; Savanna.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042005000100004

Seasonality of insects in the semi-arid Caatinga of northeastern Brazil
Provedor de dados: 92
Autores: Vasconcellos,Alexandre; Andreazze,Ricardo; Almeida,Adriana M.; Araujo,Helder F. P.; Oliveira,Eduardo S.; Oliveira,Uirandé.
Insects are essential to tropical ecosystems functioning. In semi-arid regions, the increase in abundance and/or activity (e.g. reproduction and foraging behavior) of insects is usually associated with climatic variables. The present study investigates which climatic variables are best predictors of insect abundance in an area of Caatinga in northeastern Brazil. Individuals were sampled for 24 months using Malaise and pitfall traps, and beating trays. A total of 58925 individuals belonging to 20 insect orders were collected. The most abundant orders were Hymenoptera, Diptera, Collembola and Coleoptera. Most orders studied showed a clear maximum abundance in the rainy season. Rainfall and humidity were the best predictors of insect abundance in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abundance; Climatic variables; Insect availability; Neotropical region.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262010000300019

Spatio-temporal dynamics of Alticini (Coleoptera, Chrysomelidae) in a fragment of Araucaria Forest in the state of Parana, Brazil
Provedor de dados: 92
Autores: Linzmeier,Adelita Maria; Ribeiro-Costa,Cibele Stramare.
Alticini fauna from five areas, two with different types of management (Borda and Araucaria) and three with different levels of conservation (Fase 1, Fase 2 and Fase 3), in the Araucaria Forest of the Parana was captured with malaise traps. The material was collected weekly, from September/1999 to August/2001, in the Parque Estadual of Vila Velha, Ponta Grossa. 1,891 individuals of 106 Alticini species were collected with only seven species common to all areas. Despite the proximity between sampling areas, the number of species shared between pairs of areas was low, not reaching 40%, with the Araucaria and Fase 1 areas being the most similar. The community structure of the areas Fase 1 and Fase 2 were most related. Fase 1, in initial stage of succession,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abundance; Beta diversity; Community structure; Flea beetles; Malaise.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262009000200013

Distribuição de abundância e tamanho do corpo de invertebrados do folhiço em uma floresta de terra firme na Amazônia Central, Brasil
Provedor de dados: 92
Autores: Cunha,Hélida Ferreira da; Diniz-Filho,José Alexandre Felizola; Brandão,Divino.
Abundace and body size distribution of invertebrates of leaf litter in Amazonian forest, Brazil. Based on 605 invertebrates sampled of the litter in an Amazonian Forest, some basic macroecological patterns for this assemblage were described. The relationship between abundance and body size, at logarithmic scale, was triangular, and the distribution of species was constrained in an asymmetric triangular envelope, that was tested using null model procedures in ECOSIM (P= 0,0002). The most abundant species were at an intermediated body size. The relationship between maximum abundance with different mean body size classes confirmed the Energetic Equivalent Rule (b = -1,069; t-0,75 = -2,13; P = 0.079). This way, species tend to consume energy from the community...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abundance; Body size; Energetic Equivalence Rule; Invertebrates; Triangular pattern.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262003000100009

Seasonality and temporal structuration of Alticini community (Coleoptera, Chrysomelidae, Galerucinae) in the Araucaria Forest of Parana, Brazil
Provedor de dados: 92
Autores: Linzmeier,Adelita Maria; Ribeiro-Costa,Cibele Stramare.
Seasonality was studied for Alticini trapped with malaise over a period of two years in the Vila Velha State Park, Parana, Brazil. Coleoptera, Chrysomelidae and Alticini showed seasonal distribution, with the highest abundance during spring and summer months. The abundance peaks of these groups were not synchronized. Of all environmental variables tested, photoperiod had the larger effect on the distributional patterns of Coleoptera, Chrysomelidae and Alticini. Also, Chrysomelidae and Alticini probably are related to the quality and availability of host-plants. When richness was high there was a greater similarity among seasons of different years. However, when richness was not pronounced, seasons showed more similarity within the same year than between...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abundance; Community structure; Competition; Herbivorous; Seasonality.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262008000200009

Biology of the immature stages of Strymon crambusa (Lycaenidae, Theclinae) on Oxalidaceae
Provedor de dados: 92
Autores: Silva,Neuza Aparecida Pereira da; Lepesqueur,Cintia; Souza,Agnelo Rodrigues; Morais,Helena Castanheira.
ABSTRACT We document the biology and morphology of the egg, caterpillar, and pupa of Strymon crambusa (Hewitson, 1874), a Neotropical Eumaeini. In the Cerrado, the caterpillar feeds on the inflorescences and leaves of Oxalis L. S. crambusa has four larval instars, all of which are illustrated. The density of caterpillars on plants is higher than that recorded for leaf-feeding caterpillars and other flower-feeding Eumaeini, which suggests that the species is a specialist on Oxalidaceae in the Cerrado.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abundance; Cerrado grassland; Hemiargus hanno; Oligophagous; Papilionoidea.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262016000100068

Orchid bee baits attracting bees of the genus Megalopta (Hymenoptera, Halictidae) in Bauru region, São Paulo, Brazil: abundance, seasonality, and the importance of odors for dim-light bees
Provedor de dados: 92
Autores: Knoll,Fátima R. N.; Santos,Leandro M.
Nocturnal bees in the genus Megalopta Smith, 1853 are generally collected using artificial light sources. However, between 1993 and 2000, a total of 946 females (no males were captured) were captured using aromatic baits commonly used for orchid bees (Euglossini) in five localities in Bauru region, São Paulo, Brazil. Aromatic compounds used in bait traps were: benzyl acetate, eucalyptol, eugenol, skatole, methyl salicylate, and vanillin. The Megalopta species collected were: M. guimaraesi (71.2% of total number of specimens), M. amoena (28.1%), and M. aegis (0.6%). Using the data from these traps, we showed that there was a positive and significant correlation between the abundance of individuals and meteorological factors, rainfall and temperature. Bees...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abundance; Chemical baits; Scent; Seasonality.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262012000400013

Perfil da fauna de himenópteros parasitóides (Insecta, Hymenoptera) em uma área de Mata Atlântica do Parque Estadual da Fonte Grande, Vitória, ES, Brasil
Provedor de dados: 92
Autores: Azevedo,Celso Oliveira; Kawada,Ricardo; Tavares,Marcelo Teixeira; Perioto,Nelson Wanderley.
Survey of the hymenopterous parasitoids (Insecta, Hymenoptera) from the Parque Estadual da Fonte Grande, Vitória, ES, Brazil. Parasitoids Hymenoptera were collected in a trail inside the Parque Estadual da Fonte Grande (20º17'51.7''S; 40º20'13.1''W), located in an area of the Atlantic Forest, during the period of June 2000 to July 2001. A total of 4,595 specimens, belonging to 28 families, have been collected. Braconidae, Eulophidae, and Scelionidae, were the most common families, with relative abundance of 22.5%, 14.32%, and 13.12%, respectively. Sixteen families showed the relative frequency lower than 1%. A preliminary list with 47 genera of some of the families is included.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abundance; Atlantic Forest; Hymenoptera; Parasitoids; Survey.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262002000200005

Eloria subapicalis (Lepidoptera: Noctuidae: Lymantriinae): rare and specialist species on Erythroxylum (Erythroxylaceae) in the cerrado
Provedor de dados: 103
Autores: Diniz,Ivone R; Lepesqueur,Cintia; Milhomen,Michelle S; Bandeira,Fabiana C. S; Morais,Helena C.
Eloria subapicalis (Walker, 1855) is a rare species (61 individuals in four years of samplings) of Noctuidae (Lymantriinae) with a specific diet consisting of leaves of Erythroxylum P. Browne (Erytroxylaceae) species in Brasilia's cerrado. Generally, the rarity of a caterpillar species may have many explanations such as a generalist diet, being restricted to a host plant that is scarce in the area, or occurring in a limited geographical area. However, all the above explanations do not apply to E. subapicalis because it shows specificity of diet, uses a common host plant in the cerrado areas, and has a large geographical distribution.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abundance; Diet specificity; Folivorous caterpillar; Host plants; Moths.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702011000100009

Severe population decline of marsh deer, Blastocerus dichotomus (Cetartiodactyla: Cervidae), a threatened species, caused by flooding related to a hydroelectric power plant
Provedor de dados: 103
Autores: Andriolo,Artur; Piovezan,Ubiratan; Costa,Mateus J.R. Paranhos da; Torres,Hermógenes A.; Vogliotti,Alexandre; Zerbini,Alexandre N.; Duarte,José M. B.
Balancing power production and environmental conservation can be problematic. The objective of this study was to investigate the abundance of marsh deer in the Paraná River Basin, above the Sergio Motta (Porto Primavera) Dam, before and after the impact of the dam closure. A fixed-wing, flat window aircraft was used to survey study transects. Observations were recorded based on the distance sampling line transect method, assuming that the detection probability decreases with increased distance. The abundance of marsh deer in the survey region prior to flooding was estimated to be 974 individuals (CV = 0.23). The overall abundance dropped from 974 to 444 (CV = 0.26) individuals after flooding, an overall reduction of 54%. This reduction can be attributed to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abundance; Anthropogenic impact; Cervids; Distance sampling; Distribution.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702013000600007

Assessing the population density of the spotted paca, Cuniculus paca , (Rodentia: Cuniculidae) on an Atlantic Forest island, southeastern Brazil
Provedor de dados: 103
Autores: Ferreguetti,Átilla C.; Pereira,Bruno C.; Bergallo,Helena G.
ABSTRACT The spotted paca, Cuniculus paca (Linnaeus, 1766), is a Neotropical, opportunistic, frugivorous caviomorph rodent, that inhabits primarily broadleaf forests. We aimed to provide the first estimates of density of C. paca for the Ilha Grande, an island located in the Atlantic Rain Forest biome of Brazil. Density and population size were estimated using the total number of individuals observed along each trail through the program DISTANCE 7. Our estimates of density and population size reinforces the importance of the Ilha Grande as an important reservoir of the species. Therefore, the results presented herein can be a starting point to support future action plans for the species, making predictions regarding the ecosystem and management and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abundance; Distance sampling; Ilha Grande State Park; Line-transect.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702018000100344

Determinants of capture-recapture success: an evaluation of trapping methods to estimate population and community parameters for Atlantic forest small mammals
Provedor de dados: 103
Autores: Barros,Camila S.; Püttker,Thomas; Pinotti,Bruno T.; Pardini,Renata.
ABSTRACT Efficiently obtaining high-quality data on animal populations and communities is paramount for ecological and conservation studies. In many instances these data come from live-trapping, the success of which depends on various factors, such as the interaction between the trap's mechanisms and the morphological or ecological characteristics of the animals, and weather conditions that can affect both trap efficiency and animal behavior. Integrative approaches that address the simultaneous effects of these factors on capture-recapture success are rare. Here we contribute to close this knowledge gap by focusing on a large capture-recapture dataset from three 2-ha grids monitored for approximately two years (totaling 55.000 traps-night) in the Morro...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abundance; Biodiversity survey; Demography; Richness; Trapping protocol.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702015000500334

Population dynamics of Megalobulimus paranaguensis (Gastropoda: Pulmonata) in the southeast coast of Brazil
Provedor de dados: 103
Autores: Miranda,Marcel S.; Fontenelle,José H.
ABSTRACT. The population dynamics of Megalobulimus paranaguensis (Pilsbry &amp; Ihering, 1900), a large and long-lived land gastropod from Brazil's Southeast (Atlantic Forest) was studied between 2006 and 2009, at an urban park in the city of Santos, state of São Paulo. The study included biometry, weighing, and marking and recapture of adult individuals. The variables obtained from specimens were correlated with the environmental variables of the study period. The survival rate of the adult snail population was 96.7%. Recruitment showed several peaks during the year, and was concentrated between April and August, except in 2009, when there was only one peak in August. Specimen abundance progressively increased from 2006 on, with a trend towards relative...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Activity; Abundance; Dormancy; Land snail.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702015000600463

Population biology and secondary production of the stout razor clam Tagelus plebeius (Bivalvia, Solecurtidae) on a sandflat in southeastern Brazil
Provedor de dados: 103
Autores: Abrahão,Jolnnye R.; Cardoso,Ricardo S.; Yokoyama,Leonardo Q.; Amaral,A. Cecilia Z.
The population biology and production of the stout razor clam Tagelus plebeius Lightfoot, 1786 were investigated on an intertidal sandflat on the southeast coast of Brazil (Enseada Beach, São Sebastião, state of São Paulo) between April 1997 and April 1998. Two rectangular sites of 50 X 10 m parallel to the waterline were established, site A (upper intertidal level) and site B (middle intertidal level), where the samples were taken in an 0.5 x 0.5 m quadrat. High abundances were recorded in winter and spring, with no significant differences between the sites. The high bivalve abundances were related to the presence of very fine homogeneous sediment with low salinities. Tagelus plebeius had negative allometric growth, characteristic of deep burrowers for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abundance; Growth; Intertidal zone; Mortality.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000100009

Kelp gulls, Larus dominicanus (Aves: Laridae), breeding in Keller Peninsula, King George Island, Antarctic Peninsula
Provedor de dados: 103
Autores: Branco,Joaquim O.; Costa,Erli S.; Araujo,Jansen de; Durigon,Edison; Alves,Maria Alice S.
We examined the distribution, abundance and density of the Kelp Gull, Larus dominicanus (Lichtenstein, 1823), at Keller Peninsula on two occasions during the breeding season of 2007-2008 (once for incubation and once for chick stages) and compared our results with previously published data. We present information on the number of eggs, incubation success, and initial development of L. dominicanus chicks in the studied sites. The abundance and density of the species has remained statistically similar in Keller Peninsula over the last 30 years (since 1978-1979). Although the abundance and density were almost unchanged, we recorded alterations in the occupation of the breeding areas by L. dominicanus, mainly the abandonment of breeding sites in the eastern...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abundance; Breeding sites; Broods development; Density; Distribution.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702009000300021

Temporal variations of Collembola (Arthropoda: Hexapoda) in the semiarid Caatinga in northeastern Brazil
Provedor de dados: 103
Autores: Ferreira,Aila Soares; Bellini,Bruno Cavalcante; Vasconcellos,Alexandre.
The richness and abundance of Collembola species can be influenced by many biotic and abiotic factors, mainly humidity. The semiarid region of Brazil is dominated by Caatinga dryland vegetation which experiences distinct seasonal alterations of its physiognomy linked to regional rainfall regimes. The present study evaluated the environmental factors affecting populations of Collembola in an area of Caatinga vegetation in Northeastern Brazil during a 12-months period. Specimens were collected by active searching in ten 20 x 20 m plots, with a sampling effort of 1 hour/person/plot. A total of 1231 specimens were collected, comprising 15 morphospecies, 12 genera, and nine families. Both species richness and individual abundances demonstrated oscillations...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abundance; Climatic variables; Edaphic fauna; Seasonality; Species richness.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702013000600008

Capture sequence and relative abundance of bats during surveys
Provedor de dados: 103
Autores: Esbérard,Carlos E. L.
It is expected that rare species will be gradually added to biodiversity surveys over time and that complete inventories will include rare species. The objective in the present work is to test whether the capture sequence of species during a bat survey is related to species abundance. Species with capture rates lower than 0.01x10-3 captures/hour-net were considered rare. At Ilha da Gipóia, rare species accounted for 22.22% of the total and, at Rio das Pedras Reserve, they represented 30.00%. The existence of a negative relationship between the relative abundance and the first night of capture of each species for the Ilha da Gipóia and the high significance level for the accumulation curve at both localities suggest that the documentation of a large number...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abundance; Atlantic Forest; Sampling effort; Methods; Southeastern Brazil.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702009000100016

Humpback whale Megaptera novaeangliae (Cetartiodactyla: Balaenopteridae) group sizes in line transect ship surveys: An evaluation of observer errors
Provedor de dados: 103
Autores: Bortolotto,Guilherme A.; Danilewicz,Daniel; Andriolo,Artur; Zerbini,Alexandre N.
ABSTRACT Accurate estimates of group sizes through line transect sampling methods are important to correctly ascertain the abundance of animals that occur in groups. Since the average observed group size is a component of the distance sampling formula, bias in these data leads to biased abundance estimates. This study aimed to evaluate the potential errors in group size estimation during line transect ship surveys to estimate abundances of the humpback whale, Megaptera novaeangliae (Borowski 1781). In a research cruise along the Brazilian coast, an experiment to collect group size information was conducted from two different sighting platforms on the same vessel. Group sizes were recorded by primary observers at first sighting (PO1) and, in some cases,...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Abundance; Bias; Conservation; Distance sampling; Mysticetus.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702016000204001

Reptiles in Monterey pine plantations of the Coastal Range of Central Chile
Provedor de dados: 97
Autores: Uribe,Sandra V; Estades,Cristián F.
BACKGROUND: In Chile, most of the timber industry depends on Monterey pine (Pinus radíala (D. Don.)) plantations, which now cover more than 1.5 million ha. In spite of the intensive management of these plantations, they are home to a large number of wildlife species. One of the least known groups in this type of environment are reptiles. For this reason, we conducted a study on the distribution and abundance of reptiles at plantations of different ages in seven sites in the Coastal Range of Central Chile. RESULTS: From seven species that could be potentially found in the study region, a total of five species were recorded, with Liolaemus lemniscatus (Gravenhorst) being the most abundant (with up to 160 ind*ha-1). Detectability of species was similar in...
Tipo: Journal article
Palavras-chave: Abundance; Detectability; Habitat use; Understory; Plantation; Lizard.
Ano: 2014
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2014000100022

Farming systems as an ecological refuge against the parasitism by Edotia doellojuradoi (Isopoda: Idoteidae) on Mytilus edulis (Mollusca: Mytilidae) in Aysén, Chile
Provedor de dados: 97
Autores: VALENCIA,VALENTINA; GEORGE-NASCIMENTO,MARIO.
This study compares the prevalence and abundance of the isopod Edotia doellojuradoi in the mussel Mytilus edulis, between water column rope farming systems and nearby natural benthic beds at Puerto Raúl Marín Balmaceda (43° 46' S, 72° 57' W), Aysén, Chile, taking into account the maximum shell length of the host as a covariate. In addition, the damage caused by E. doellojuradoi was assessed with the visual inspection of the gills, according to the protocol of Zaixso et al. (2009). The isopod was found almost exclusively in natural benthic habitats, where the prevalence increased with the length of the host. The isopod is a macroparasite and not a commensal as previously suggested because it causes gill damage to the mussel, which increased with the...
Tipo: Journal article
Palavras-chave: Abundance; Ecological refuge; Gill damage; Mussels; Valve length.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2013000200004

Abundance, distribution and feeding patterns of a temperate reef fish in subtidal environments of the Chilean coast: the importance of understory algal turf
Provedor de dados: 97
Autores: PALMA,ÁLVARO T.; OJEDA,F. PATRICIO.
Cheilodactylus variegatus is an abundant carnivorous demersal reef fish that lives in the shallow subtidal of the north-central Chilean coast. Characteristically, these environments are dominated by kelp forests of Lessonia trabeculata. This species preys on a great variety of benthic invertebrates, and shows particularly high consumption rates on amphipod crustaceans. In our study, two widely separated populations of C. variegatus were considered (central and northern Chile). Individuals that form part of these populations show considerable differences in their distribution, abundance and trophic behavior. In the northern zone, the species is abundant and both juveniles and adults are distributed along the whole bathymetric gradient. This contrasts with...
Tipo: Journal article
Palavras-chave: Cheilodactylidae; Shallow subtidal; Understory macroalgae; Carnivorous fish; Amphipods; Distribution; Abundance; Chile.
Ano: 2002
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2002000100018

Impact of crop management systems on soil nematode communities in South Brazil
Provedor de dados: 63
Autores: Machado,Andressa Cristina Zamboni; Zagatto,Maurício Rumenos Guidetti; Skora Neto,Francisco; Silva,Santino Aleandro da; Zanão Júnior,Luiz Antonio.
ABSTRACT The analysis of nematode communities allows inferring consequences of management practices on the soil food web. We studied the taxonomic structure of nematode communities in preserved areas of the Atlantic forest (native forest = NF) in Ponta Grossa, Paraná State, Brazil, and in three different agroecosystems in neighboring areas to assess the effect of agricultural land use on nematode assemblages. Agroecosystems were located in a red latosol cropped during 30 years under conventional tillage (CT), no-tillage (NT), and minimal tillage (MT). We collected ten composite soil samples in each area in the summer. Nematodes were extracted by Baermann funnel and fixed with formalin. Subsequently, individuals were classified into taxonomic groups and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abundance; Diversity; Taxonomic structure; Soil indicators.
Ano: 2022
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162022000100701

Abundance and distribution of thrips (Thysanoptera: Thripidae) in mangosteen (Garcinia mangostana L.) grown in single- and mixed-cropping systems
Provedor de dados: 106
Autores: Kanitta Pankeaw; Aran Ngampongsai; Surakrai Permkam; Onkamol Rukadee.
Tipo: Collection
Palavras-chave: Mangosteen; Thrips; Abundance; Distribution; Single cropping systems; Mixed cropping systems; มังคุด; เพลี้ยไฟ; ระบบการปลูกพืชเชิงเดี่ยว; ระบบการปลูกพืช; การแพร่กระจาย.
Ano: 2011
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5217

Sazonalidade de três espécies de Syrphidae (Insecta, Diptera) capturadas com armadilha Malaise no Estado do Paraná, Brasil
Provedor de dados: 104
Autores: Marinoni,Luciane; Bonatto,Sionei Ricardo.
The project "Survey of the Entomolo-gical Fauna in Paraná" (PROFAUPAR) was carried out in eight localities of Paraná, Brazil, during two years. In the first year a total of 1.607 specimens of Syrphidae were collected with Malaise trap. The species Toxomerus tibicen (Wiedemann, 1830), Microdon milis Curran, 1940 and Leucopodella gracilis (Williston, 1891) were the most abundant. The abundance and seasonality of each species are evaluated.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Diptera; Syrphidae; Abundance; Seasonality; Malaise trap; Paraná; Brazil.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752002000100007

Abundância e sazonalidade das espécies de Hydropsychidae (Insecta, Trichoptera) capturadas em armadilha luminosa no Estado do Paraná, Brasil
Provedor de dados: 104
Autores: Marinoni,Luciane; Almeida,Gisele Luziane de.
During one year of the project called "Survey of the Entomological Fauna in Paraná State" (henceforth PROFAUPAR), 126,340 adult specimens of Trichoptera were collected with light trap. The individuais of the family Hydropsychidae were identified and a list of species is presented. Eighteen species in four genera were identified. From this, S. (R.) discalis Flint, 1972,5. (R.) paramnsis Flint, 1983;S (R.) spinulosa Flint, 1972 are for the first time registered for Brazil and Leptonema sparsum (Ulmer, 1905), Macrostemum hyalinum (Pictet, 1836), S. (Smicridea) albosignata Ulmer, 1907; S. (Rhyacophylax) dentifera Flint, 1983; S. (R.) iguazu Flint, 1983; S. (R.) piraya Flint, 1983; S. (R.) unguiculaia Flint, 1983; S. (R.) vermiculata Flint, 1978 and S. (R.)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Trichoptera; Hydropsychidae; Abundance; Seasonality; Species rich-ness; Light trap; Paraná; Brazil.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752000000100025

Abundância e sazonalidade das espécies de Leptoceridae (Insecta, Trichoptera) capturadas com armadilha luminosa no Estado do Paraná, Brasil
Provedor de dados: 104
Autores: Almeida,Gisele Luziane de; Marinoni,Luciane.
From 126,340 adult specimens of Trichoptera captured with light trap during one year of the project called "Survey of the Entomological Fauna in Paraná State" (Paraná, Brazil), 6,375 belong to the family Leptoceridae. The individuals of the family were identified and a list of species is presented. The following species are recorded for the first time to Paraná State: Achoropsyche duodecimpunctata (Navas. 1916); Nectopsyche aureovittala Flint, 1983; Nectopsyche fuscomaculata Flint, 1983; Nectopsyche muhni (Navas, 1916); Nectopsyche separata (Banks, 1920); Nectopsyche ortizi Holzenthal, 1995; Nectopsyche splendida (Navas, 1917) and Tripleclides gracilis (Burmeister, 1839). Discussion on individual abundance and species seasonality are also presented.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Trichoptera; Leptoceridae; Abundance; Seasonality; Species richness; Light trap; Paraná; Brazil.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752000000200005

Levantamento da fauna de abelhas silvestres na "zona da mata" de Minas Gerais: III. Mata secundária na região de Viçosa (Hymenoptera, Apoidea)
Provedor de dados: 104
Autores: Cure,José Ricardo; Thiengo,Marciana; Silveira,Fernando A.; Rocha,Luis B.
The outcome of a wild bee fauna survey in a secondary forest is reported. Sampling was carried out mainly on herbaceous and shrubby vegetation under and at the border of the forest. Results are compared with data collected with the same methodology from a previously surveyed grassland nearby. The secondary forest was richer in Anthophoridae and Apidae species, and less diverse in Megachilidae. Similarity between the two habitats was low. Several unidentified species of Ceratinula, Trichocerapis mirabilis and the stingless bees Melipona bicolor, M. quadrifasciata, M. marginata, Paratrigona subnuda, Scaptotrigona tubiba and S. xanthotricha, are among the species dependent on the forest environment to survive. Bee population densities in the forest understory...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Apoidea; Diversity; Abundance; Neotropics.
Ano: 1992
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751992000200008

Flutuações temporal e espacial de abundância e composição de tamanho de Aegla castro Schmitt (Crustacea, Anomura, Aeglidae) no Buraco do Padre, Ponta Grossa, Paraná, Brasil
Provedor de dados: 104
Autores: Swiech-Ayoub,Bianca de Paula; Masunari,Setuko.
A study of the annual abundance fluctuation, temporal distribution and size composition of Aegla castro Schmitt, 1942 was carried out at the Buraco do Padre, Quebra-Perna River, Tibagi River Basin, in the municipality of Ponta Grossa, Paraná State. The samplings were done monthly, from February/97 to January/98 with the aid of a hand net and screens at three stations, under an effort of 120 minutes. The average air temperature ranged from 15.0ºC (May, July, September and October) to 24.3ºC (December and January), and the water temperature from 15.8ºC (July) to 22.3ºC (December). The dissolved oxygen oscillated from 95.7% (March) to 100. 2% (August) saturation, and the pH from 6.1 (July) to 7.2 (September). The water flow speed varied from 0.2 m/s to 1.2...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crustacea; Decapoda; Aegla castro; Abundance; Size composition; Ponta Grossa; Paraná State.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752001000300032

Family composition of Muscoidea communities in adjacent areas of secondary tropical forest and pasture field in Rio de Janeiro, Brazil
Provedor de dados: 104
Autores: Caldas,Astrid; Almeida,Josimar Ribeiro de; A'Almeida,José Mario.
The Muscoidea community of two adjacent areas was sampled. For eight months one area was of secondary tropical forest and the other was an open field used for cattle grazing. The main purpose of the study was to investigate if there would be any differences in abundance, family diversity, community composition and bait attractiveness. Results suggest that the change in the environment resulted in a reduction of overall abundance, but not a reduced diversity in terms of families. None of the families was led to a marked decrease or increase, as might be expected in a disturbed environment. The changes observed in the community composition were not significant for the distribution and abundance rank of the families within that community. The environmental...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Muscoidea community; Abundance; Bait attractiveness; Deforestation; Diversity.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751999000300027

Análise preliminar das manifestações sonoras e do habitat de Picumnus nebulosus Sundevall (Aves, Picidae)
Provedor de dados: 104
Autores: Anjos,Luiz dos.
Observations and recordings of Picumnus nebulosus Sundevall, 1866 were carried out at Santa Rita farm (21º15'S, 50º00'), municipality of Palmeira, state of Paraná, southern Brazil, from 1984 to 1991. The song of this species (0.25 s to 0.64 s total time) is composed by a series of four to six high pitched (6.3 to 7.8 kHz) and short (0.03 to 0.05 s) notes (n=23). The fight call is a series of very short notes emitted between 2 to 8 kHz during 0.23 s to 0.32 s (n=34). The drum, a sequence of pulses, is emitted during 3.5 to 7.2 s (n=42); the four sequences in the begining are composed by four pulses and the rest by three pulses. P. nebulosus was more abundant in forest patches than in continuous forest. It was usually watched foraging in branches 1 to 4 mm...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Picumnus nebulosus; Sounds; Habitat; Abundance; Araucaria forest.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751999000200009

Abundância, riqueza e diversidade de abelhas Euglossinae (Hymenoptera, Apidae) em florestas contínuas de terra firme na Amazônia Central, Brasil
Provedor de dados: 104
Autores: Oliveira,Marcio Luiz de; Campos,Lúcio Antônio de Oliveira.
The fauna of Euglossinae bees were studied in two areas of "terra firme" continuous forest in the Central Amazon. Brazil. During one year (september/1989-august/1990) the collections were done fortnightly, using traps with eight kinds of seents baits. The traps were placed in the understory and in the tree crowns. The continuous forest of "terra firme" near Manaus are among those with the highest speeies richness of Euglossinae in the Neotropics. The species richness was higher than that found in other studies carried out in Brazil also. One study area had higher species richness and abundance, while species diversity was higher in another one. The diversity was different significally between the two areas.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Apidae; Euglossinae; Abundance; Amazon; Diversity.
Ano: 1995
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751995000300009

Sazonalidade de Nyssodrysina lignaria (Bates) (Coleoptera, Cerambycidae, Lamiinae), no Estado do Paraná, Brasil
Provedor de dados: 104
Autores: Marinoni,Renato C.; Ganho,Norma G.
As part of two surveys in the state of Paraná, Nyssodrysina lignaria (Bates, 1864) (Cerambycidae, Coleoptera) was sampled using malaise traps. One of the surveys was developed in eight different sites (Antonina, São José dos Pinhais, Colombo, Ponta Grossa, Telêmaco Borba, Jundiaí do Sul, Guarapuava e Fênix) from August 1986 to July 1987 and another one in five areas in different conditions of forest conservation, all located at Vila Velha, Ponta Grossa, from September 1999 to August 2000. The data indicate that the seasonality is congruent with the conditions found in temperate regions, with an activity peak in the spring-summer months. In the beginning of fall a second peak of abundance was observed, but not as high as in the spring-summer. These two...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abundance; Inga; Leguminosae; Malaise trap; Populational fluctuation.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752003000100018

Variação morfométrica e demográfica em Phaleria testacea Say (Coleoptera, Tenebrionidae) de duas praias do Rio de Janeiro
Provedor de dados: 104
Autores: Almeida,M.D. de; Caldas,A; Almeida,J.R. de.
The species Phaleria testacea Say, 1824 (Coleoptera, Tenebrionidae) varies a lot in size, and its populations along the coast of Brazil, where it lives buried in sandy beaches, have temporal and geographical variation in density. In order to find out which factors were contributing to these variations, we sampled populations from three different areas in Rio de Janeiro, during summer and winter. Simultaneously, we made an analysis of the different substracts where the individuals were found, including their total fresh weight. The results show a significant difference in size of individuals between and within populations, when summer and winter were compared. There is also a positive association between the population density of P. testacea and the amount...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coleoptera; Tenebrionidae; Phaleria testacea; Morphometry; Abundance.
Ano: 1993
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751993000100005

Abundância relativa e distribuição espaço-temporal de Micropogonias furnieri (Desmarest) e Cynoscion leiarchus (Cuvier) (Perciformes, Sciaenidae) no manguezal do Itacorubi, Santa Catarina, Brasil
Provedor de dados: 104
Autores: Hostim-Silva,Maurício; Ribeiro,Gisela Costa; Clezar,Leandro; Ledo,Blanca Sierra de.
Attempting to contribute with the knowledge about the bioecological aspects concerning the youth forms of M. furnieri (Desmarest, 1823) and C. leiarchus (Cuvier, 1830) from Itacorubi mangrove, 15 samplings were taken from January 1988 to March 1989. Using casting and entangle nets, a total of 308 individuais from these species were captured. Their abundanee were: M. furnieri N = 197 (64,0%); C. leiarchus N = 111 (36,0%). The relative frequency and range of total weights and lengths were studied. Concerning spatial distribution of the species, it was observed that M. furnieri occurred in all areas and C. leiarchus was not captured only in "D" area (Sertão River). During the anual cycle the two species occurred jointly. The results emphasize other authors...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sciaenidae; Mangrove; Abundance; Distribution.
Ano: 1992
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751992000200011

Further observations on zooplankton of the Potengi Estuary (Natal, Rio Grande do Norte, Brazil) with special reference to the larvae of Brachyura (Crustacea, Decapoda)
Provedor de dados: 104
Autores: Sankarankutty,C; Oliveira,J.E. Lins; Cunha,K.M.F; Silva,A.C.C; Barroca,E.V.G.
The present paper deals with data on zooplankton collected from the estuary of Potengi, Natal, Rio Grande do Norte, Brazil covering a period of one year from October 1992 to October 1993. Three fixed stations within the estuary located at varying distances from the mouth of the river were sampled. Sampling was done monthly when the tide was lowest. Analysis of the samples has shown clear pattern of seasonal variations in abundance of the dominant zooplankton components which are composed of Copepoda, Appendicularia, larvae of Brachyura, larvae of Cirripedia and Chaetognalha. A detailed study of the larvae of Brachyura was also attempted which showed that seven species can be identified in the samples, of which those of Aratus pisonii (H. Milne Edwards) and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brachyura; Seasonal; Abundance; Taxonomy; Larvae; Estuary; Brazil.
Ano: 1995
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751995000200007

Distribuição e abundância relativa de cumbaca Trachelyopterus striatulus Steindachner (Osteichthyes, Auchenipteridae) no reservatório de Lajes, Rio de Janeiro, Brasil
Provedor de dados: 104
Autores: Duarte,Silvana; Caetano,Carla de Brito; Vicentini,Rafaela Nascimento; Araújo,Francisco Gerson.
The catfish Trachelyopterus striatulus Steindachner, 1877 is a very abundant fish species in reservoirs in Southeast Brazil, and its relative abundance seems to be increasing in several lentic environments. Despite of being a very common species, few information is available on its distribution and other aspects of ecology. The Lajes reservoir (22º42'-22º50'S e 43º53'-44º05'W) is the largest manmade lake for hydropower purposes in Rio de Janeiro State, where this species rank among the top abundant fishes, both in number and in biomass. Its relative abundance were compared in three zones of the reservoir (upper, central and lower), based on a standardized program, during three annual periods (monthly sampling in 1994 and bi-monthly sampling in 1996 and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Auchenipteridae; Distribution; Abundance; Environmental parameters; Lajes; Reservoir.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752002000300029

Trap efficiency evaluation for small mammals in the southern Amazon
Provedor de dados: 36
Autores: SANTOS-FILHO,Manoel dos; LÁZARI,Patrick Ricardo DE; SOUSA,Cícero Pedro Farias de; CANALE,Gustavo Rodrigues.
The effectiveness of ecological researches on small mammals strongly depends on trapping techniques to survey communities and populations accurately. The main goal of this study was to assess the efficiency of three types of traps (Sherman, Tomahawk and Pitfall) to capture non-volant small mammals. We installed traps in 22 forest fragments in the southern Brazilian Amazonia. We captured 873 individuals belonging to 21 species; most of the individuals (N = 369) and species (N = 19) were trapped using Pitfalls, followed by Shermans (N = 271 individuals; N = 15 species) and Tomahawks (N = 233 individuals; N = 15 species). Pitfalls trapped a richer community subset of small mammals than the two other types of traps, and a more abundant community subset than...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fragments; Sampling techniques; Abundance; Community ecology.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672015000200187

Notes on necrophagous flies (Diptera: Calyptratae) associated to fish carrion in Colombian Amazon
Provedor de dados: 36
Autores: Amat,Eduardo.
In recent years, there has been an increasing number of studies on carrion fly communities due to their medical importance and as a consequence of the large number of studies on forensic entomology. Surprisingly few studies have adressed with the asynantropic flies of the Amazon, and none were done in Colombia. A faunistic study of asynantropic flies of the families Calliphoridae, Sarcophagidae, Muscidae and Fannidae in three different landscapes of the Colombian Amazon is presented, trapping effectiveness is assessed, and the first record of Mesembrinella batesi (Aldrich, 1922) and Fannia femoralis (Stein, 1897) from Colombia is reported.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Faunistic survey; Non parametric estimators; Richness; Abundance; Modified Trap.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672010000200018

Abundance of two Dendrocincla woodcreepers (aves: Dendrocolaptidae) in relation to forest structure in Central Amazonia
Provedor de dados: 36
Autores: Cintra,Renato; Maruoka,Adrianny Erika; Naka,Luciano Nicolas.
Few studies have been conducted to verify how the structure of the forest affects the occurence and abundance of neotropical birds. Our research was undertaken between January 2002 and July 2004 at the Reserva Ducke, near Manaus (02º55',03º01'S; 59º53',59º59'W) in central Amazonia, to verify how the forest structure affects the occurrence and abundance of two bird species: the Plain-brown Woodcreeper Dendrocincla fuliginosa and the White-chinned Woodcreeper Dendrocincla merula. Bird species occurrence was recorded using lines of 20 mist-nets (one sample unit), along 51 1-km transects distributed along 9 pararel 8 km trails covering an area of 6400 ha. Along these transects, we placed 50 x 50m plots where we recorded forest structure components (tree...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abundance; Distribution; Birds; Dendrocolaptidae; Dendrocincla; Amazon forest.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672006000200011

TEMPORAL VARIATION IN THE ABUNDANCE OF Poblana alchichica IN NEAR-SHORE HABITAT OF THE HIGH ELEVATION LAKE, LAGO DE ALCHICHICA, PUEBLA, MEXICO
Provedor de dados: 37
Autores: WOOLRICH-PIÑA,GUILLERMO A; GEOFFREY R,SMITH; LEMOS-ESPINAL,JULIO A; MONTOYA-AYALA,RAYMUNDO; ÁVILABOCANEGRA,LUIS E; BENAVIDES GARDUÑO,EDUARDO.
The distribution and abundance of organisms within a pond or lake can reflect the result of a variety of factors. We examined the abundance of the endemic fish, Poblana alchichica, in Lago de Alchichica, Puebla, Mexico, as well as how the abundance varied among months. Dissolved oxygen, temperature, and salinity varied among months. The abundance of Poblana alchichica peaked in December and February. For the months when fish were observed, their abundances were positively related to dissolved oxygen concentration and were generally not related to temperature. Our results provide evidence that there is substantial seasonal variation in the abundances of Poblana alchichica and that within months, their distributions are likely driven by dissolved oxygen than...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abundance; Dissolved oxygen; Poblana alchichica; Salinity; Seasonal variation; Temperature.
Ano: 2012
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2012000100015

Effect of water stress on seedling growth in two species with different abundances: the importance of Stress Resistance Syndrome in seasonally dry tropical forest
Provedor de dados: 39
Autores: Ferreira,Wanessa Nepomuceno; Lacerda,Claudivan Feitosa de; Costa,Rafael Carvalho da; Medeiros Filho,Sebastião.
ABSTRACTIn seasonally dry tropical forests, species carrying attributes of Stress Resistance Syndrome (SRS) may have ecological advantages over species demanding high quantities of resources. In such forests, Poincianella bracteosa is abundant, while Libidibia ferrea has low abundance; therefore, we hypothesized that P. bracteosa has characteristics of low-resource species, while L. ferrea has characteristics of high-resource species. To test this hypothesis, we assessed morphological and physiological traits of seedlings of these species under different water regimes (100%, 70%, 40%, and 10% field capacity) over 85 days. For most of the studied variables we observed significant decreases with increasing water stress, and these reductions were greater in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abundance; High-resource species; Libidibia ferrea; Low-resource species; Morphological traits; Physiological traits; Poincianella bracteosa; Stress Resistance Syndrome; Water stress.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062015000300375

Studies in South-Occidental Amazon: contribution to the knowledge of Brazilian Chironomidae (Insecta: Diptera) - doi: 10.4025/actascibiolsci.v34i2.9195
Provedor de dados: 3
Autores: Vieira, Lisandro Juno Soares; Universidade Federal do Acre; Rosin, Gisele Cristina; Universidade Estadual de Maringá; Takeda, Alice Michyio; Universidade Estadual de Maringá; Lopes, Maria Rosélia Marques; Universidade Federal do Acre; Sousa, Daniel Silva de; Universidade Federal do Acre.
Chironomidae (Diptera) are a diverse and large group of small flies, whose larvae inhabit nearly every possible niche in most freshwater aquatic ecosystems. The Acre river is an important affluent of the Purus river. Our objective was to contribute to the knowledge of Chironomidae in this region by making the first survey of Chironomidae composition in the Acre river (Amazon Basin), and relate its distribution to physical and chemical variables. Samples were collected at three sites using a modified Petersen grab. A grain size analysis showed heterogeneity between sampling sites. Eighteen morphospecies of Chironomidae larvae were recorded. In site 2, there was higher density of Chironomidae. Higher richness was observed in site 1, and the composition of...
Palavras-chave: Ciências Biológicas Amazon; Composition; Abundance; Distribution Ecologia de Ecossistemas.
Ano: 2012
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/9195

Resposta das algas perifíticas às alterações de temperatura e ao enriquecimento artificial de nutrientes em curto período de tempo - DOI: 10.4025/actascibiolsci.v31i3.1627
Provedor de dados: 3
Autores: Murakami, Eliza Akane; UEM; Rodrigues, Liliana; UEM.
O estudo visou avaliar, em um experimento de mesocosmos, a influência da temperatura e de concentrações de nutrientes na abundância das algas perifíticas (exceto Bacillariophyceae) na planície de inundação do alto rio Paraná. O delineamento experimental constituiu-se de cinco tratamentos: controle (C) e adição de nutrientes (P+, N+ e NP+) a 25&amp;deg;C, e frio (F) com diminuição da temperatura a 15&amp;deg;C e sem adição de nutrientes. Lâminas de vidro foram utilizadas para colonização das algas perifíticas, e as amostragens foram feitas entre o 15&amp;deg; e o 31&amp;deg; dia de sucessão. Pela Análise de Correspondência Canônica, pode-se observar uma clara separação entre os tratamentos devido à temperatura e adição de nutrientes. A diminuição de...
Palavras-chave: 2.00.00.00-6    Ciências Biológicas algas perifíticas; Enriquecimento artificial; Temperatura; Mesocosmos; Planície de inundação periphytic algae; Artificial enrichment; Temperature; Abundance; Floodplain.
Ano: 2009
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/1627

Influence of pitfall designs and use of baits on the capture of small mammals in Southern Minas Gerais, Brazil - doi: 10.4025/actascibiolsci.v35i4.17498
Provedor de dados: 3
Autores: Rocha, Daniel Gomes da; Instituto de Desenvolvimento Sustentável Mamirauá / Instituto Nacional de Pesquisas da Amazônia; Passamani, Marcelo; Universidade Federal de Lavras.
Each kind of trap tends to be selective on species sampled, in a way that each one only reveals part of the abundance and species richness of the community sampled. In this way, in order to know the factors that affect the success of sampling methods is crucial for a better planning of experiments and data analysis. The aim of this study was to evaluate the factors that affect the success of pitfall traps in capturing small mammals, such as trap size, designs and use of bait. The study was carried out in two reserves inside the campus of the Universidade Federal de Lavras (UFLA), in South Minas Gerais State, Brazil. In total, 65 specimens belonging to 8 species were caught. Different types of trap design (Y-shaped and I-shaped) have not influenced the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 2.04.06.00-2; 2.05.00.00-9 sampling methods; Abundance; Species richness; Rodent; Marsupial 2.04.00.00-4.
Ano: 2013
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/17498

Diel variation in abundance and size of the seabob shrimp Xiphopenaeus kroyeri (Crustacea, Penaeoidea) in the Ubatuba region, Southeastern Brazil
Provedor de dados: 42
Autores: Simões,Sabrina M.; Costa,Rogerio C.; Fransozo,Adilson; Castilho,Antonio L.
The objective of the present study was to analyze diel variation in the abundance and size of the seabob shrimp Xiphopenaeus kroyeri in the Ubatuba region, state of São Paulo, during the year 2000. In each season of the year, collections were made in the day and at night on 9 transects at depths ranging from 2 to 40 m. The estimated shrimp amount was of 28,878 individuals. Although the catch rate was higher during the day (15,853 shrimp), this did not differ significantly from the catch at night (13,025). The catch rate was higher in daytime on most transects, but was higher at night at locations where fine and very fine sand predominated. The majority of juveniles were caught during the day. The mean size (CL) was 14.43 ± 4.02 mm for day and 14.82 ± 4.28...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abundance; Distribution; Penaeidae; Xiphopenaeus kroyeri.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652010000200013

Asilidae (Diptera) of two Atlantic Forest protected areas of Rio de Janeiro, Southeastern Brazil
Provedor de dados: 42
Autores: MOREIRA-JUNIOR,DANILO P.; MAIA,VALÉRIA C.
ABSTRACT As few Asilidae inventories of Rio de Janeiro areas have been published, there are many data gaps. This paper aims to contribute to the knowledge of richness, abundance and distribution of this family in this State. From January 2013 to March 2014, insects were collected monthly using Malaise traps and every two months using entomological nets in the Reserva Biológica União (REBIO), and Estação Ecológica Estadual de Guaxindiba (EEEG). 682 specimens of Asilidae were collected in the present study, distributed in 31 genera and 51 species (20 identified and 31 unidentified), 527 of REBIO (in 19 genera and 38 species - 14 identified and 24 unidentified), and 155 specimens of EEEG (in 12 genera and 19 species - 6 identified and 13 unidentified)....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abundance; Distribution; Richness; Tableland forest; Dense ombrophilous forest.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000401579

Abundance of the reef-building Petaloconchus varians (Gastropoda: Vermetidae) on intertidal rocky shores at Ilha Grande Bay, southeastern Brazil
Provedor de dados: 42
Autores: BREVES,ANDRÉ; SZÉCHY,MARIA TERESA M. DE; LAVRADO,HELENA P.; JUNQUEIRA,ANDREA O.R.
ABSTRACT The reef-building vermetid Petaloconchus varians occurs in the western Atlantic Ocean, from the Caribbean Sea to the southern coast of Brazil. The present study evaluated the abundance of P. varians on intertidal rocky shores in Ilha Grande Bay (Rio de Janeiro State), and characterized their reefs, describing the species density, besides the weight and the belt width of the reefs. Petaloconchus varians reefs were recorded at 25 sites, with rocky shores exposed to different wave action (very sheltered, sheltered, semi-exposed and exposed) and slopes (10° to 46°). Clusters of individuals constructed large reefs along the middle intertidal zone, creating a wide belt (38 cm to 2 m). The density of P. varians and the weight of the reefs ranged from 620...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abundance; Molluscs; Rio de Janeiro; Southwestern Atlantic Ocean; Wave exposure.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000300907

Variations in the abundance of three Parulidae species in the southern portion of the Brazilian Atlantic Forest, state of Paraná
Provedor de dados: 42
Autores: Santana,Cássius R.; Bochio,Gabriela M.; Anjos,Luiz dos.
We evaluated the distribution of abundance of three species of warblers in the southern portion of the Brazilian Atlantic Forest (BAF): Tropical Parula (Parula pitiayumi), the Golden-Crowned Warbler (Basileuterus culicivorus) and the White-Rimmed Warbler (Basileuterus leucoblepharus). Three types of forests comprise this region of the Atlantic Forest: seasonal semi-deciduous forest (SF), mixed rain forest (MF) and dense rain forest (DF). These forest types occur at different elevations: SF ranging from 200 to 800 m, MF ranging from 800 to 1,200 m and DF ranging from sea level up to 2,000 m. We used point counts in fifteen study areas distributed in the three forest types. The White-Rimmed Warbler and the Tropical Parula had higher abundances in MF, and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abundance; Atlantic Forest; Basileuterus; Distribution; Elevation; Warblers.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652012000300014

Diversity of anurans in dry forest fragments of a subtropical region in Brazil
Provedor de dados: 42
Autores: SANTOS,EDUARDO J. DOS; CONTE,CARLOS E.
ABSTRACT This study aimed to identify and compare the diversity between two areas within different matrices located in the Mesophytic Semideciduous Forest; to compare composition and diversity registered to other assemblages; and to evaluate which criteria used here were the most important when sampling them. Data was obtained from September 2011 to March 2012 from 10 sites with different habitats in two areas of mid northern state of Paraná, southern Brazil. We recorded 18 species. Alfa-diversity between the areas did not vary, but the population within one of them was more stable, suggesting better distribution and equity of species in the available habitat. Beta-diversity in the region was high; a result attributed to the species Dendropsophus nanus....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Atlantic Forest; Semideciduous Forest; Inventory; Richness; Abundance; Comparison.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000501923

Splendid oddness: revisiting the curious trophic relationships of South American Pleistocene mammals and their abundance
Provedor de dados: 42
Autores: FARIÑA,RICHARD A.; CZERWONOGORA,ADA; GIACOMO,MARIANA DI.
The South American Pleistocene mammal fauna includes great-sized animals that have intrigued scientists for over two centuries. Here we intend to update the knowledge on its palaeoecology and provide new evidence regarding two approaches: energetics and population density and relative abundance of fossils per taxa. To determine whether an imbalance exists, population density models were applied to several South American fossil faunas and the results compared to those that best describe the palaeoecology of African faunas. The results on the abundance study for Uruguay and the province of Buenos Aires during the Lujanian stage/age reveal that bulk-feeding ground sloths (Lestodon and Glossotherium) were more represented in the first territory, while the more...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abundance; Megafauna; Palaeoecology; Population density; Secondary productivity; Quaternary.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000100311

Large-Scale Spatial and Temporal Variability of Larval Fish Assemblages in the Tropical Atlantic Ocean
Provedor de dados: 42
Autores: SOUZA,CHRISTIANE S. DE; MAFALDA JUNIOR,PAULO O.
Abstract This study investigated the large-scale spatial and temporal variability of larval fish assemblages in the west tropical Atlantic Ocean. The sampling was performed during four expeditions. Identification resulted in 100 taxa (64 families, 19 orders and 17 suborders). During the four periods, 80% of the total larvae taken represented eight characteristics families (Scombridae, Carangidae, Paralepididae, Bothidae, Gonostomatidae, Scaridae, Gobiidae and Myctophidae). Fish larvae showed a rather heterogeneous distribution with density at each station ranging from 0.5 to 2000 larvae per 100m3. A general trend was observed, lower densities at oceanic area and higher densities in the seamounts and islands. A gradient in temperature, salinity,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abiotic and biotic interactions; Abundance; Distribution; Ichthyoplankton.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000100606

Seasonal abundance of equine strongyles (Nematoda: Strongylidae) in the State of Rio de Janeiro, Brazil
Provedor de dados: 45
Autores: Martins,I.V.F.; Pereira,M.J.S.; Grisi,L.; Scott,F.B.
The seasonal abundance of lumenal and larval forms of equine strongyles in the State of Rio de Janeiro, Brazil was evaluated. Thirty horses referred to the Federal Rural University of Rio de Janeiro were necropsied and their gastrointestinal tracts were separated into stomach, small intestine, cecum, ventral colon, dorsal colon and rectum. Two aliquots of 5% of the content were collected and examined for the presence of small strongyles and the rest of the content was examined for the presence of large strongyles. The mesenteric artery, liver, pancreas and peritoneum were examined for the presence of strongyle larvae. The mucosa of intestine segments was cut into parts of equal length, and each one was examined by the mural transillumination technique....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Strongyles; Equine; Abundance; Season.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352005000100006

Temporal and spatial variations in tidepool fish assemblages of the northeast coast of Brazil
Provedor de dados: 49
Autores: Cunha,Francisca Edna de Andrade; Monteiro-Neto,Cassiano; Nottingham,Mara Carvalho.
Temporal and spatial variations and environmental factors influencing the structure of tidepool fish assemblages were quantitatively investigated at Iparana beach, northeast Brazilian coast. The majority of the tidepool fishes sampled were suprabenthic juvenile individuals of great mobility. We recorded during monthly diurnal underwater visual censuses a total of 4,750 fish from 26 species, represented mainly by partial residents from the families Scaridae, Haemulidae, Gerreidae and Pomacentridae. The number of species and individuals showed significant variability among tidepools as a response to variations in their volume and type of substrate cover. The greatest species abundance and richness associated with rocks covered with algae suggested that...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Tidepool fishes; Environmental factors; Seasonality; Diversity; Abundance.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032007000100016

Occupancy of different types of forest habitats by tyrant flycatchers (Passeriformes: Tyrannidae)
Provedor de dados: 49
Autores: Rosa,Gabriel Lima Medina; Anjos,Luiz dos; Moura,Maurício Osvaldo.
The abundance distribution of the tyrant flycatchers (Tyrannidae family) was evaluated in three main forest habitats of Mata dos Godoy State Park (PEMG), north of the state of Paraná. We conducted point counts and from the collected data we calculated the Index of Point Abundance (I. P. A.) of each species in the habitats of interior of mature forest (FLI), slope forest (FLE) and reforestation (REF). Among the 22 recorded species, eight occurred in all habitats, while other eight occurred in two habitats and six were exclusive of one habitat. Among the 16 recorded species in more than one habitat, 10 were more abundant in only one. On the contrary to our expectation and despite the clear habitat segregation among species, the abundance distribution was not...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Habitat; Foraging; Abundance; Distribution; Frugivory.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032013000400190

Distribution of frogs in riparian areas of an urban forest fragment in Central Amazonia
Provedor de dados: 49
Autores: Tsuji-Nishikido,Bruno Minoru; Menin,Marcelo.
This study aimed to evaluate how environmental variables (width of valley, stream size, forest edge distance, and leaf-litter depth) affect the abundance and richness of species of frog species in riparian areas of an urban forest fragment in Central Amazonia. The study was conducted at the campus of the Universidade Federal do Amazonas, Manaus, Brazil, between May 2008 and April 2009, when three nocturnal and diurnal samples were taken from ten plots. A total of 17 species belonging to seven families were registered. The number of species recorded per plot varied from seven to 14. We detected a relationship between the edge distance and richness: the plots with lower richness were located near the fragment border. The variables had no significant effect...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abundance; Anura; Edge effects; Diversity; Environmental variables.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032011000200007

Fishes community composition and patterns of species distribution in Neotropical streams
Provedor de dados: 49
Autores: Cavalheiro,Laísa Wociechoski; Fialho,Clarice Bernhardt.
Abstract: The ichthyofauna of streams in the Neotropical region is not yet fully known. This study aims to investigate the ichthyofauna composition of six streams of the Ijuí River sub-basin, Rio Grande do Sul State, inserted in the Uruguay River basin, as to contribute to the knowledge of fishes species richness and distribution in the south of Brazil. Sampling was carried out between July 2015 and May 2016, bimonthly, using the technique of electric fishing to collect the fishes. Spatial variations (per sampled stream) in the ichthyofauna composition were tested with a permutational multivariate analysis of variance. In total, we collected 5,029 individuals from 55 species, 13 families and five orders. From these species, 17 are endemic to the Uruguay...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abundance; Characidae; Heptapteridae; Loricariidae; Richness; Uruguay River basin.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032020000100302

Seasonal pattern of Chrysomelidae (Coleoptera) in the state of Paraná, southern Brazil
Provedor de dados: 49
Autores: Linzmeier,Adelita Maria; Ribeiro-Costa,Cibele Stramare.
The aim of this paper was to describe the seasonal patterns of Chrysomelidae and of its most abundant species at eight sites in different geomorphological and floristic regions in the state of Paraná, southern Brazil. Samples with Malaise traps, from August 1986 to July 1988 were performed. The Chrysomelidae showed seasonal patterns with the highest abundance in the spring and/or summer at all sites, but with variations in the months of highest captures. Photoperiod was the variable that most influenced the seasonality of Chrysomelidae, and along with temperature and relative humidity, determined most of the seasonal patterns of the family at the different sites. Some dominant species of Chrysomelidae showed different seasonal pattern compared to the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abundance; Alticini; Herbivorous insects; Distribution pattern; Seasonality.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032013000100018

DIVERSITY AND DISTRIBUTION OF FISHES ALONG THE DEPTH GRADIENT OF A CORAL REEF WALL AT SAN ANDRÉS ISLAND, COLOMBIAN CARIBBEAN
Provedor de dados: 50
Autores: Serna Rodríguez,Karen Melissa; Zapata,Fernando A.; Mejía-Ladino,Luz Marina.
"Blue Wall", in San Andrés Island (Colombia), is an outer reef slope with an inclination that increases with depth to nearly 90°. Such a steep gradient facilitates the identification of patterns of variation in species abundance and diversity along depth. To document such patterns in fishes associated with this habitat, 30 visual censuses were conducted along 30 x 2 m transects, located at 5 m intervals between 5-30 m depth, in which the abundance and diversity of species was estimated. A total of 2916 individuals belonging to 46 species from 21 families were recorded within transects. Ten additional species were observed outside of transects for a total richness of 56 species. The dominant species were Canthigaster rostrata, Chromis cyanea, Stegastes...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abundance; Community structure; Outer reef slope; Species assemblages; Vertical zonation.
Ano: 2016
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-97612016000100002

The fate of copepod populations in the Paranapanema River (São Paulo, Brazil), downstream from the Jurumirim dam
Provedor de dados: 52
Autores: Mitsuka,Patricia Maria; Henry,Raoul.
The longitudinal changes in the structure of copepod populations were examined during the dry and rainy seasons in a 42 km stretch of the Paranapanema River downstream from the dam of the Jurumirim Reservoir. Samples were taken in the "lacustrine" zone of the reservoir near the dam, and also at 12 stations distributed in the middle and the lateral regions of the channel of the Paranapanema River downstream from the dam. The following species of Cyclopoida were found at the sites: Thermocyclops decipiens, Thermocyclops minutus, Paracyclops sp., Tropocyclops sp and Mesocyclops sp., and of Calanoida: Argyrodiaptomus furcatus, Notodiaptomus iheringi and Notodiaptomus conifer. In the reservoir sampling station, the copepod abundance during the dry and rainy...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Downstream; Reservoir; Copepod; Abundance.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132002000600012

Aerial line transect survey to estimate abundance of marsh deer (Blastocerus dichotomus) (Illiger, 1815)
Provedor de dados: 52
Autores: Andriolo,Artur; Piovezan,Ubiratan; Costa,Mateus José Rodrigues Paranhos da; Laake,Jeff; Duarte,José Maurício Barbanti.
The objective was to estimate abundance of marsh deer in the Paraná River basin of this work. The results provided information to support further analysis of the impact of the Porto Primavera flooding lake over population. Sixty-nine animals were recorded by aerial survey using distance sampling methodology. Animals were widely distributed throughout the study area. The uncorrected data resulted in a estimate density of 0.0035 ind/ha and a population size of 636 individuals. Correcting the g for the animals that could be missed the calculated abundance was 896 (CV=0.27) individuals. This methodology was applied with success to survey marsh deer. The result was important to evaluate the marsh deer status in the area, and for future analysis of the impact of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abundance; Aerial Survey; Blastocerus dichotomus; Marsh deer; Distance Sampling.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000600017

Species Diversity and Community Structure of Arthropod Pests and Predators in Flax, Linum Usitatissimum L. from Darjeeling (India)
Provedor de dados: 52
Autores: Pal,Suprakash; Mandal,Rupsanatan; Sarkar,Indrajit; Ghimiray,Tulsi Saran; Sharma,Binay Raj; Roy,Ayon; Roy,Suvendu Kumar; Chakraboorty,Gautam; Mitra,Sabyasachi.
ABSTRACT The species richness and relative abundances of different aboveground plant-dwelling pest and predator species were assessed in flax (Linum usitatissimum L.) ecosystem under mid-hill conditions of eastern Himalayas. The experiment was conducted in winter seasons during 2004-2013 at the Regional Research Station (Hill Zone), Uttar Banga Krishi Viswavidyalaya, Kalimpong, West Bengal, India. Twenty five species of phytophagous arthropods under 13 families were observed belonging to 6 different orders. The gram pod borer, Helicoverpa armigera (Noctuidae: Lepidoptera), aphid, Myzus persicae (Aphididae: Hemiptera), shield bug, Plautia fimbriata (Pentatomidae: Hemiptera) and leaf webber, Nacoleia sp. (Pyralidae: Lepidoptera) were found as the most common...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Flax; Pests; Predators; Species richness; Abundance.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132017000100459

Ichthyoplankton distribution and abundance off southeastern and southern Brazil
Provedor de dados: 52
Autores: Freitas,Débora Martins de; Muelbert,José Henrique.
This study describes the distribution of fish eggs and larvae along the southeastern and southern Brazilian coast. Plankton samples were collected at 85 stations using a Bongo net, and water salinity and temperature were profiled with a CTD. Results showed that fish eggs and larvae, and zooplankton biovolume were distributed in coastal waters with mean temperature of 23&amp;#186C and salinity between 33 and 34. The largest egg abundance occurred along Iguape (24&amp;#186'S) with a partial overlap with zooplankton biovolume and fish larvae were most abundant near shore close to Santos (24&amp;#186S). These protected coastal waters presented a surface layer with lower salinity and higher temperatures, while the bottom layer had cooler water. Ichthyoplankton...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ichthyoplankton; Southern Brazilian Continental Shelf; Abundance; Distribution.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000400014

Biology of Chirocentrodon bleekerianus (Poey, 1867) (Clupeiformes: Pristigasteridae) in a continental shelf region of southern Brazil
Provedor de dados: 52
Autores: Corrêa,Carlos Eduardo; Chaves,Paulo de Tarso; Guimarães,Paulo Ricardo Bittencourt.
This study provides information on the biology of C. bleekerianus from Paraná State coast, Brazil, assembling data about its abundance, size structure, diet and reproduction. Monthly collections were accomplished in 1999 and 2000 in the internal continental shelf, with trawl net. The catch-per-unit-effort did not vary significantly among the seasons. In the summer, the individuals were larger, followed by autumn, spring and winter. C. bleekerianus was predominantly planktivorous and the most frequent items in its diet were copepods followed by diatomaceous algae. Seasonal variation in the frequency values of the gonad maturation stages, gonadossomatic index and gonadal condition factor indicated that the reproductive period encompassed spring and summer....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abundance; Brazil; Chirocentrodon; Clupeiforms; Feeding; Reproduction.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000300013

Abundance and diversity of ammonia-oxidizing bacteria in relation to ammonium in a Chinese shallow eutrophic urban lake
Provedor de dados: 58
Autores: Qiu,Shanlian; Chen,Guoyuan; Zhou,Yiyong.
The measures of most-probable-number and restriction fragment length polymorphism analysis were used to analyze the abundance and diversity of ammonia-oxidizing bacteria in sediment of a Chinese shallow eutrophic urban lake (Lake Yuehu). Among the 5 sampling sites, ammonia concentration in interstitial water was positively proportional not only to the content of organic matter, but also to ammonia-oxidizing bacteria numbers (at a magnitude of 10(5) cells g-1 dry weight) in sediment significantly. Furthermore, the diversity of ammonia-oxidizing bacteria were determined by means of PCR primers targeting the amoA gene with five gene libraries created and restriction pattern analysis. The 13 restriction patterns were recorded with 4 ones being common among all...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ammonia-oxidizing bacteria; Abundance; AmoA; Diversity.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822010000100031

Effects of open drainage ditch design on bacterial and fungal communities of cold waterlogged paddy soils
Provedor de dados: 58
Autores: Qiu,Shanlian; Wang,MK; Wang,Fei; Chen,Jichen; Li,Xiaoyan; Li,Qinghua; Lin,Cheng; Lin,Xinjian.
A field experiment established in 1980 was conducted to evaluate the effects of open drainage ditch applied for water removal on bacterial and fungal communities of cold waterlogged paddy soils in 2011. In this experiment, traditional plate counting and temperature gradient gel electrophoresis were employed to characterize the abundance and diversity of soil bacterial and fungal communities. Four different distances from the open drainage ditch, 5, 15, 25 and 75 m with different degrees of drainage were designed for this study. Maximum populations of culturable aerobic bacteria and fungi were at 15-m distance while minimum populations were at 75-m distance. Significant differences (p &lt; 0.05) in fungal populations were observed at all distances from open...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abundance; Bacterial and fungal communities; Diversity; Open drainage ditch.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822013000300050