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| Registros recuperados: 37 | |
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| Pinto, M.A.. |
| The reduction of shrimp by-catch when fishing with shrimp trawlers can constitute a strategy to minimise discards. A research cruise was conducted in February 1995 in shallow waters off Sofala Bank, Mozambique to investigate the sorting (selection) efficiency of cod-ends (55mm and 60mm meshes) compared to the top-grid (14mm space bar) systems using covered cod-end method. The selectivity parameters were obtained for Otolithes ruber, Johnius dussumieri and Thryssa vitrirostris through the maximum likelihood estimate (MLE) method, using logit function and pooled samples through the variance component model (VCM) . The top-grid was mounted at a theoretical angle of 33°, one metre aft of the retriever strap, in a downward direction. The overall shrimp to... |
| Tipo: Report |
Palavras-chave: Shallow water; Shrimp fisheries. |
| Ano: 1999 |
URL: http://hdl.handle.net/1834/364 |
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| Martínez, J.. |
| Reporte del estudio de la pesca acompañante del camarón para el Golfo de Guayaquil, para los meses de mayo, junio y julio de 1986. Se dan a conocer las diferentes familias y/o especies para las categorías camarón, pescado bueno y basura; con sus respectivas tasas de captura y porcentajes de ocurrencia. La razón fue 1:2.18:13.84 kg.h-1 variando 1:2.75:12.60 kg.h-1 determinándose que entre 13%-17% es aprovechado para consumo humano directo y entre 77%-81% es aprovechado. Hipotéticamente se calculó para el total de la flota camaronera (240 barcos), que apróximadamente de 11,000 y 36,000 t son aprovechadas anualmente y entre 70,000 y 190,000 t son devueltas al mar. |
| Tipo: Journal Contribution |
Palavras-chave: By catch; Shrimp fisheries. |
| Ano: 1986 |
URL: http://hdl.handle.net/1834/3150 |
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| Villamar, F.. |
| En el presente estudio se realiza un bioensayo para determinar el grado de concentración media letal del dispersante de petróleo BP 1100-WD, utilizando organismos vivos en condiciones de laboratorio. Se describe el método estadístico de Bliss. En definitiva el propósito de realizar bioensayos es la de comparar la toxicidad de diferentes compuestos y conocer la sensibilidad de las diversas especies, para determinar los mecanismos de los efectos de las sustancias ensayadas (Alcazar, 1988). |
| Tipo: Journal Contribution |
Palavras-chave: Bioassays; Toxicity; Larvae; Shrimp fisheries; Bioassays; Toxicity; Larvae. |
| Ano: 1990 |
URL: http://hdl.handle.net/1834/2164 |
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| Brito, A.. |
| Trawling for penaeid shrimps in Sofala Bank (central Mozambique) has been suggested to have major effects on the size of sea turtle populations. A total of 39 commercial fishers, fishery observers and enforcers were interviewed to assess the level of sea turtle catches in fishing operations and reported that at least 1,735±1,235 sea turtles are caught each fishing season of about seven months. Green turtle (Chelonia mydas, 48.4%), the loggerhead turtle (Caretta caretta, 25.8%) were the most common species, but catches also comprised the olive ridley (Lepidochelys olivacea),the hawksbill turtle (Eretmochelys imbricata) and the leatherback (Dermochelys coriacea). Over 54.8% of the incidents occur within a few miles of the small islands forming the Primeiras... |
| Tipo: Journal Contribution |
Palavras-chave: Marine turtles; Trawling; Shrimp fisheries; Prawns and shrimps; Trawling. |
| Ano: 2012 |
URL: http://hdl.handle.net/1834/5142 |
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| Ajayi, T.O.. |
| Before the Nigerian Institute for Oceanography and Marine Research was established in 1975, the Research division of the parent body carried out extensive resources surveys of the inshore waters (0-50m depth), identified and documented most of the Nigerian Marine and brackish water fish and shrimp resources. The promulgation of the Sea Fisheries Decree of 1971 was based on the research findings of the division which also initiated the biological study of the commercially important fishes. The research efforts of the division provided the first ever scientific information on the coastal oceanography of Nigeria. The possibility of a viable brackish water polyculture was also established at Buguma and Lagos.... |
| Tipo: Report |
Palavras-chave: Inshore waters; Freshwater fish; Shrimp fisheries; Coastal oceanography; Historical account. |
| Ano: 1991 |
URL: http://hdl.handle.net/1834/1185 |
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| Giménez Hurtado, E.; Alzugaray Martínez, R.; Garcés Rodríguez, Y.; Delgado Miranda, G.; Ventura Flores, A.. |
| Se determinó la biomasa del camarón rosado Farfantepenaeus notialis presente en el golfo de Ana María durante el periodo 1997-2010 mediante análisis estadístico de captura por edades (SCA). Esta se incrementó a partir del año 2008 como respuesta al aumento del reclutamiento, cuyo promedio anual presenta sus mayores valores en julio, noviembre y marzo. La entrada de reclutas (pre-adultos) al área de pesca ocurre por dos zonas principales, frente a los cayos de Ana María, y en Sta. Cruz Abajo, al norte de la porción sur de los cayos de las Doce Leguas. Una pesquería a finales del año puede provocar una sobrepesca del crecimiento y afectar la biomasa disponible para el siguiente año. |
| Tipo: Journal Contribution |
Palavras-chave: Biomass; Recruitment; Shrimp fisheries. |
| Ano: 2012 |
URL: http://hdl.handle.net/1834/4382 |
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| García-Sáez, R.; Mendívez, W.; Chicaiza, D.. |
| De enero a diciembre de 2008 la flota arrastrera camaronera de Esmeraldas desembarcó un total de 322,3 t, el cual representó un decremento del 21.3 % con relación al 2007. Para la obtención de esta información se utilizó encuestas pesqueras (zonas y días efectivos de pesca, desembarques etc.) y biológicas (sexo, estadio gonadal y talla). La flota activa promedio estuvo compuesta por 19 barcos arrastreros camaroneros. La principal especie desembarcada fue el camarón café (Farfantepenaeus californiensis) la cual presentó un rango de tallas de captura entre 12,0 y 20,5 cm (LT), seguido del camarón rojo (F. brevirostris). En esta zona se registró un predominio de individuos hembras en estadio vacía e inmadura. |
| Tipo: Journal Contribution |
Palavras-chave: Trawlers; Landing statistics; Sexual maturity; Growth rate; Shrimp fisheries; Prawn fisheries. |
| Ano: 2009 |
URL: http://hdl.handle.net/1834/4783 |
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| Fernández, M.. |
| En este estudio se presenta el análisis de la relación entre los valores de densidad de hembras maduras y de hembras impregnadas de langostino Pleoticus muelleri (Bate, 1888) del Golfo San Jorge y las variables ambientales. Los datos analizados provienen de las campañas de investigación del INIDEP OB-03/08 y OB-01/09 realizadas en noviembre-diciembre de 2008 y en enero-febrero de 2009, respectivamente; en el área comprendida entre las latitudes 43º 20´ S y 47º 00´ S y el meridiano 64º 00´ W y la costa. Se consideraron las variables biológicas: densidad de hembras maduras y de hembras impregnadas de langostino, por rango de tallas y las variables ambientales: profundidad, temperatura y salinidad de agua de fondo así como, la diferencia de temperatura y de... |
| Tipo: Theses and Dissertations |
Palavras-chave: Females; Sexual maturity; Spawning grounds; Environmental conditions; Spatial analysis; Statistical models; Shrimp fisheries. |
| Ano: 2009 |
URL: http://hdl.handle.net/1834/5159 |
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| Fernández, M.. |
| This is a study on surficial sediments and bottom water physico-chemical characteristics of the San Jorge Gulf (SW Atlantic, Argentina)during spring 1999 - winter 2000 (first studied period), autumn 2001- summer 2002 (second studied period)and winter 2003 (third studied period), based on samples obtained during research cruises carried out on board of the INIDEP (Instituto Nacional de Investigación y Desarrollo Pesquero)research vessels. Environmental variables such as temperature, salinity, density, oxygen and bottom water chlorophyll a content as well as granulometric fractions, total organic matter, total organic carbon, total nitrogen, total phosphorous, chlorophyll a and phaeopigments in sediment concentration and depth were analyzed. The origen and... |
| Tipo: Theses and Dissertations |
Palavras-chave: Physicochemical properties; Benthic environment; Organic matter; Shrimp fisheries; Benthos; Organic matter; Benthos; Physicochemical properties; Benthic environment. |
| Ano: 2006 |
URL: http://hdl.handle.net/1834/3134 |
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| Luten, J.; Bouquet, W.; Oehlenschläger, J.; Meetschen, U.; Etienne, M.; Stroud, G.; Bykowski, P.; Batista, I.; Vyncke, W.; Stefansson, G.. |
| Eight WEFTA laboratories participated in two series of intercomparison exercises on sulfite determination in tropical shrimps. Samples of tropical shrimps were spiked with sodium metabisulfite (Na<sub>2</sub>S<sub>2</sub>O<sub>5</sub>) and hydroxymethylsulfonate (HMS) at a level of 25-90 mg SO<sub>2</sub>/kg. Most of the laboratories determined the sulfite content with (modified) methods of Monier-Williams or De Vries et al. The overall mean recovery of sulfite was rather low (47-60%), which may be attributed to an irreversible reaction of sulfite with the tropical shrimps. The repeatability of the methods within the participating laboratories was good. However, reproducibility among the laboratories was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Detection; Fishery products; Food technology; International cooperation; Quality control; Recovery; Shrimp fisheries; Sulphites. |
| Ano: 1997 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=5742 |
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| Miazaki, Lizandra Fernandes; Santos, Ana Paula Freitas dos; Salvati, Dalilla da Silva; Simões, Sabrina Morilhas; Costa, Rogério Caetano da. |
| Litopenaeus schmitti is one of the most commercially exploited penaeids on the southeastern and southern Atlantic coast of Brazil. Information about juvenile recruitment and growth patterns of individuals is important for management programs. The present study estimated the growth parameters, longevity, and recruitment of L. schmitti in the region of Ubatuba, São Paulo State. The growth parameters of individuals were estimated by the Bertalanffy growth model, and longevity was estimated with the inverted Bertalanffy equation. The growth parameters were, for females and males respectively: CL∞ = 53.10 mm and 43.23 mm, k = 1.82 year-1 and 2.19 years-1, t0= 1.10 and 0.69. Longevity was calculated to be 2.27 years for females and 2.10 years for males.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dendrobranchiata; Shrimp fisheries; Closed season; Bertalanffy; Growth coefficient.. |
| Ano: 2018 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/40379 |
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| Vianna,Marcelo; Almeida,Tabajara. |
| Trawling for pink shrimp (Farfantepenaeus brasiliensis and F. paulensis) catches also large quantities of fish, mostly bony fish, which are discarded, as they have no commercial value. Their composition and abundance were studied in an area that corresponded to the southeastern coastline of Brazil. Ninety one species were registered. Incidental fishing affected mainly small individuals and occured throughout the year. The year round rate of bony fish to shrimp catches was 10,5:1,0. Three assemblages of bony fishes could be identified, influenced by the seasonal variation of the water masses, the predominant group being associated with the Coastal Water, another with the penetration of colder waters onto the platform (SACW) and a third group of a more... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bycatch; Bony fishes; Demersal fish; Shrimp fisheries. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000500014 |
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| Registros recuperados: 37 | |
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