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| Registros recuperados: 160 | |
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| 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 |
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| Renzi, M.A.. |
| The "abadejo" is one of the species that has been traditionally exploited in the Argentine Sea. Although the capture was not very important, it has been increased in the last years. In this work, the structure of the concentration areas of summer, spring and winter distribution and other biological items were analyzed, basing on the data collected during cruises effected by R/V "Walther Herwing" and R/V "Shinkai Maru" in these waters during 1978/79. Winter and spring distribution patterns showed the highest concentrations located between 41º and 48º SL, specially on the slope. Summer distribution pattern showed the concentration areas located between 43º30' and 48º30' LS shifted rather to the coast when comparing to the previous one. During the winter, in... |
| Tipo: Theses and Dissertations |
Palavras-chave: Geographical distribution; Population structure; Feeding; Length-weight relationships; Stomach content; Diets; Seasonal distribution. |
| Ano: 1982 |
URL: http://hdl.handle.net/1834/5028 |
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| Cassia, M.C.; Hansen, J.E.. |
| The Patagonian cod (Salilota australis) inhabits the SW Atlantic from 38°S up to 55°S, as well as the Pacific Ocean from 40°S up to 57°S. The annual catches of this species by both the Argentine fleet and those operating around the Malvinas Islands have significantly increased during the decade 1990-2000, peaking to 16,556 t in 1996. After this, a marked decrease in landings was noticed, and during 2003 the catch was 7,924 t. Seasonal distribution, concentration grounds, and population structure of the Patagonian cod from the Argentine Sea are described, and the mean densities of the species are seasonally related to latitude, temperature and depth, on the basis of data from surveys carried out by the INIDEP research vessels in 1992 and 1993. Highest mean... |
| Tipo: Journal Contribution |
Palavras-chave: Gadoid fisheries; Seasonal distribution; Population density; Population structure; Biomass; Population structure; Biomass; Population density; Http://aims.fao.org/aos/agrovoc/c_6115; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_6112. |
| Ano: 2005 |
URL: http://hdl.handle.net/1834/1561 |
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| Bosa,Cláudia Regina; Masunari,Setuko. |
| A study of the population of the xanthid crab Pilumnus dasypodus Kingsley, 1879 from rocky shore at the Farol Isle (25º51'S and 48º32'W) was carried out in the following aspects: temporal and spatial distributions of density, annual fluctuation of the sex ratio, size composition of the population and reproductive activities of the species. Monthly, four leveis in relation to emmersion time within intertidal zone were sampled, from May/90 to April/91, but Pilumnus dasypodus was obtained only in the levels 2, 3 and 4. The surface water temperature ranged from 16.0ºC (July/90) to 28.0ºC (February/91). A total of 775 individuais of Pilumnus dasypodus were collected among which, 92 were ovigerous females. The population density ranged from 14.63 ind.m-3... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pilumnus dasypodus; Population structure; Farol Isle; Paraná State. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752000000400016 |
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| Sabatini, M.. |
| The abundance, distribution and structure of the zooplankton community in southern Patagonia (SW Atlantic Ocean) were studied during late summer (March-April 2000) from samples obtained with Nackthai (390 ~km) and Multinet (150 ~km) samplers. Total concentrations of zooplankton biomass, integrated in the water column, ranged between 1.0 and 14.5 g m-2 (dry weight) and reached the highest values in the mid and outer shelf off Bahía Grande (Santa Cruz Prov., Argentina) (51~'S). The < 5 mm size fraction, composed mainly of copepods represented, on average, 45% of the total; amphipods and euphausiids accounted for 20% and 31%, respectively. Amphipods were, almost exclusively, Themisto gaudichaudii and euphausiids most abundant species Euphausia lucens and... |
| Tipo: Journal Contribution |
Palavras-chave: Zooplankton; Biomass; Population structure; Geographical distribution; Continental shelves; Zooplankton; Biomass; Population structure; Geographical distribution; Continental shelves; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_6115; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_32413. |
| Ano: 2008 |
URL: http://hdl.handle.net/1834/3142 |
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| Antacli, J.C.. |
| This Thesis contributes to elucidate the life cycle strategies of two copepod species, the medium-size clausocalanid Drepanopus forcipatus Giesbrecht, 1888 and the large calanid Calanus australis Brodsky, 1959, in relation to the environmental conditions in the southern Patagonian shelf (47°-55°S). This research was mainly carried out with samples collected in late summer/early autumn (March/April, 2004) onboard RV "Dr. E. L. Holmberg" (INIDEP, Mar del Plata). An additional sampling performed during early spring (October, 2005) with RV "Puerto Deseado" (CONICET) was also utilized. The present study was based on the following research questions: 1) Which is the available food for copepod populations by late summer? 2) Which is the relative contribution of... |
| Tipo: Theses and Dissertations |
Palavras-chave: Zooplankton; Trophic levels; Population structure; Hydrography; Community composition. |
| Ano: 2011 |
URL: http://hdl.handle.net/1834/4205 |
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| Castro S., C.; Monroy L., M.; Solano, O.D.. |
| The epifaunal community associated with free-living colonies of Millepora alcicornis, the dominant coral species in Portete Bay, was characterized from twenty living colonies randomly collected within a shallow Thalassia testudinum seabed. The three-dimensional growth colonies sheltered 15 families, 15 genera and 18 mobile invertebrate species. The 97% of individuals was represented by decapods crustaceans specially adapted as to live in association with the host. Within them, the porcelanid Petrolisthes armatus, representing 79% of the epifauna (961 individuals), was exclusively found in a juvenile stage suggesting that M. alcicornis is mainly used by this species as a nursery zone. The epifaunal composition is partially related to coral living tissue... |
| Tipo: Journal Contribution |
Palavras-chave: Population structure; Crustacean fisheries; Population structure; Http://aims.fao.org/aos/agrovoc/c_6115. |
| Ano: 2006 |
URL: http://hdl.handle.net/1834/1973 |
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| Beltrán Rodríguez, Leonardo Alejandro. |
| Hintonia latiflora “quina amarilla” habita en el Bosque Tropical Caducifolio, es medicinal por lo que se comercializa la corteza interna. La recolecta es excesiva y las poblaciones están cada vez más distantes y escasas. No se cuenta con información biológica, ecológica y social que permita establecer criterios para la gestión y conservación de la especie, por ello, el presente estudio se desarrolló en Tlalcozotitlán, Guerrero, el sitio de cosecha comercial de quina. Se documentó la historia natural y antropógena de H. latiflora sustentada en la literatura científica y en observaciones de campo; se investigó la estructura poblacional, la influencia de la cosecha de corteza sobre caracteres arquitectónicos, reproductivos y en la densidad, además, se... |
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Palavras-chave: Quina amarilla; Historia natural; Factores físicos; Estructura poblacional; Corteza medicinal; Gestión comunitaria; Yellow quina; Natural history; Physical factors; Population structure; Medicinal bark; Community management; Botánica; Maestría. |
| Ano: 2013 |
URL: http://hdl.handle.net/10521/2183 |
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| Rivas Valencia, Patricia. |
| La tristeza es causada por un complejo viral constituido por diversos haplotipos (hps) del Citrus tristeza virus (CTV). El objetivo fue realizar un análisis de la estructura poblacional en diferentes escenarios epidémicos: a) En Yucatán, México, en condiciones asintomáticas (As) y con presencia de T. citricida (Tc), vector asociado a aislamientos de tipo severo; y en Tamaulipas en condiciones As y sin Tc. b) En Brasil, en condiciones As y sintomáticas (s), en regiones con y sin muerte súbita de los cítricos (MSC), síndrome atribuible a una nueva variante severa del CTV. Se estudiaron las secuencias génicas p25 y p27 de la capa proteica viral. En México, con SSCP se demostró una estructura poblacional compleja en Tamaulipas, con 7 patrones... |
| Tipo: Tesis |
Palavras-chave: SSCP; Muerte súbita de los cítricos; Estructura poblacional; Doctorado; Fitopatología; Citrus sudden death; Population structure. |
| Ano: 2008 |
URL: http://hdl.handle.net/10521/1368 |
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| Registros recuperados: 160 | |
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