Home Itens selecionados Provedores de dados OAI Créditos Sobre Ajuda

			Busca avançada
	Provedor de dados OceanDocs (8) Autor Cassia, M.C. (8) Hansen, J.E. (5) Wöhler, O.C. (4) Cordo, H.D. (3) de Ciechomski, J.D. (2) Quiroga, M.V. (1) Torroglosa, M.E. (1) Mais... Palavra-chave Biomass (5) Http://aims.fao.org/aos/agrovoc/c_926 (5) Demersal fisheries (4) Http://aims.fao.org/aos/agrovoc/c_2173 (4) Http://aims.fao.org/aos/agrovoc/c_24251 (4) Stock assessment (4) Fishery management (2) Fishing mortality (2) Gadoid fisheries (2) Http://aims.fao.org/aos/agrovoc/c_24026 (2) Argentina marine environment (1) Catch/effort (1) Embryos (1) Fecundity (1) Fish larvae (1) Fishing grounds (1) Http://aims.fao.org/aos/agrovoc/c_15725 (1) Http://aims.fao.org/aos/agrovoc/c_2924 (1) Http://aims.fao.org/aos/agrovoc/c_2947 (1) Http://aims.fao.org/aos/agrovoc/c_6112 (1) Mais... Tipo do documento Journal Contribution (8) Ano 2012 (1) 2007 (1) 2005 (1) 2002 (1) 2001 (2) 1982 (1) 1980 (1) Mais... País Belgium (8) Idioma Espanhol (7) Inglês (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 8 Primeira ... 1 ... Última Análisis secuencial de la población de polaca (Micromesistius australis) en el período 1987-1997 ajustado con valores de rendimiento por unidad de esfuerzo de pesqueros comerciales. OceanDocs Wöhler, O.C.; Cordo, H.D.; Hansen, J.E.; Cassia, M.C.. The current status of southern blue whiting Micromesistius australis stock is described. A single, closed fish population is assumed to inhabit the SW Atlantic. Based on catch data corresponding to years 1987-1997, a sequential analysis on the stock is carried out (Cohort Analysis). Under an adaptative framework, catch per unit of effort data from commercial vessels are used to fit the model. Two commercial fleets are used in the fitting, i.e. Polish vessels (1987-1994)and Argentine surimi factory vessels (1991-1997). Results indicate that both, total stock biomass and spawning stock biomass would have declined. Total biomass would have decreased from a maximum close to 1.4 million tons in 1990 down to 0.5 mt in 1997 whereas the current spawning stock... Tipo: Journal Contribution Palavras-chave: Stock assessment; Fishery management; Catch/effort; Recruitment; Biomass; Demersal fisheries; Demersal fisheries; Stock assessment; Fishery management; Biomass; Http://aims.fao.org/aos/agrovoc/c_2173; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_24026; Http://aims.fao.org/aos/agrovoc/c_926. Ano: 2001 URL: http://hdl.handle.net/1834/1867 Distribución estacional y estructura poblacional del bacalao austral (Pisces, Moridae, Salilota australis) en la zona económica exclusiva argentina entre los 45°S y 56°S durante 1992 y 1993 OceanDocs 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 Evaluación de la polaca (Micromesistius australis) del Atlántico sudoccidental, período 1987-1999. OceanDocs Wöhler, O.C.; Cordo, H.D.; Cassia, M.C.; Hansen, J.E.. Taking into account the commercial catches by the Argentine fleet and other fleets that operated around Malvinas Islands (SW Atlantic) in the 1987-1999 period, the current state of southern blue whiting (Micromesistius australis) is assessed. A sequential analysis (Cohort Analysis) tuned, in an ADAPT conceptual framework with six independent indices of abundance, was performed for the southern blue whiting stock of the SW Atlantic. Commercial catch data of the Argentinian fleet and other fleets that operate around Malvinas Islands were used.The indices included catch per unit of effort of different fleets and data from Argentine-British research surveys. The analysis showed that the decreasing trend in biomass observed in previous studies went on during... Tipo: Journal Contribution Palavras-chave: Stock assessment; Fishing mortality; Biomass; Demersal fisheries; Statistical analysis; Gadoid fisheries; Stock assessment; Biomass; Demersal fisheries; Statistical analysis; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_2173; Http://aims.fao.org/aos/agrovoc/c_7378. Ano: 2002 URL: http://hdl.handle.net/1834/2546 Evaluación de polaca (Micromesistius australis) en el Atlántico Sudoccidental. Período 1987-2001 OceanDocs Wöhler, O.C.; Hansen, J.E.; Cassia, M.C.; Cordo, H.D.. Period 1987-2001. A diagnosis of the current state of Southern blue whiting (Micromesistius australis) stock in the Southwest Atlantic was carried out on the basis of catches corresponding to the period 1987-2001 as reported by the Argentine fleet and also by vessels operating around Malvinas Islands. Abundance and current fishing mortality rates were estimated, and the biomass evolution in the long term resulting from some possible exploitation strategies based on different management strategies were projected. A sequential population analysis calibrated under a conceptual adjustable framework with five independent abundance indices was carried out. The effects on the biomass estimates were analysed by adopting different selection patterns and calibration... Tipo: Journal Contribution Palavras-chave: Fishery management; Biomass; Demersal fisheries; Stock assessment; Biomass; Fishery management; Demersal fisheries; Stock assessment; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_24026; Http://aims.fao.org/aos/agrovoc/c_2173; Http://aims.fao.org/aos/agrovoc/c_24251. Ano: 2007 URL: http://hdl.handle.net/1834/2526 Evaluación pesquera del bacalao austral (Salilota australis) del Atlántico Sudoccidental OceanDocs Wöhler, O.C.; Cassia, M.C.; Hansen, J.E.. Information about the austral cod Salilota australis caught in the Patagonian shelf including the area around Malvinas Islands (SW Atlantic)as well as some data from annual research surveys carried out as of 1992 to 1998 were analyzed. On this basis, the fishery was studied and the abundance of the stock inhabiting the area under Argentine control was estimated. To calculate the optimum yield as a function of both age-at-first catch and fishing mortality, the Yield-per-Recruit model was used. Some biological reference points were also identified and an exploitation strategy based on low risk of collapse recommended. Austral cod landings, although small, showed an increasing trend as of 1990 that reached a maximum of 14,900 tons in 1998. Most of the catches... Tipo: Journal Contribution Palavras-chave: Stock assessment; Landing statistics; Fishing mortality; Fishing grounds; Risks; Demersal fisheries; Biomass; Stock assessment; Demersal fisheries; Biomass; Fishing grounds; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_2173; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_2947. Ano: 2001 URL: http://hdl.handle.net/1834/1866 Morphometric analysis of sagitta otolith of Salilota australis (Günther, 1878) (Pisces: Moridae) of the southern Patagonian shelf, Argentina OceanDocs Torroglosa, M.E.; Quiroga, M.V.; Cassia, M.C.. The morphometric parameters of Salilota australis sagitta otolith were measured (SW Atlantic ocean). The length variable allowed to estimate the total length of individuals using potential regressions. Tipo: Journal Contribution Palavras-chave: Otoliths Morphometry Allometry Statistical analysis Salilota australis PSW; Argentina marine environment. Ano: 2012 URL: http://hdl.handle.net/1834/4907 Observaciones sobre embriones de larvas y juveniles de la pescadilla (Cynoscion striatus) OceanDocs de Ciechomski, J.D.; Cassia, M.C.. Observations on the embrionic and larval development of Cynoscion striatus are presented. The description are made on the basis of material obtained by artificial fertilization. Eggs are pelagic, spherical, 700-840µ in diameter and with single oil globule of 210µ-240µ. The yolk is homogeneous and the chorion has smooth surface. The embryonic development is short and at temperatures of 19°-20°C hatching takes place, 34-36 hours after the fertilization. The larvae at hatching are small, about 2 mm in length and not advanced in their development. The mouth is not functional and the anus is not open. The oil globule is situated in the posterior part of the yolk sac; the position of the anus is close to the posterior end of the yolk sac and the digestice tract... Tipo: Journal Contribution Palavras-chave: Embryos; Fish larvae; Fish larvae; Http://aims.fao.org/aos/agrovoc/c_2924. Ano: 1982 URL: http://hdl.handle.net/1834/2045 Reproducción y fecundidad del surel (Trachurus picturatus australis) OceanDocs Cassia, M.C.; de Ciechomski, J.D.. Studies on the sexual maturation on the jack mackerel in the area close to Mar del Plata were carried out throughout the whole year, 56 almost ripe females between 160 and 210 mm in total length and between 38 and 78 g is weight were taken into consideration for fecundity determinations. The most importante results obtained during these studies are the following: The gonad index was rather high and reached the value of 11.5.-The reproduction season is a rather one and the spawning occurs mainly in December and January.-It is assumed that a female of this species spawns once over a reproduction season, but shedding numerous batches of eggs in short intervals.-The lowest value found for the fecundity was 15.825 ovocites and the highest one was 82.892.-It is... Tipo: Journal Contribution Palavras-chave: Reproduction; Fecundity; Mackerel fisheries; Reproduction; Fecundity; Http://aims.fao.org/aos/agrovoc/c_6507; Http://aims.fao.org/aos/agrovoc/c_15725. Ano: 1980 URL: http://hdl.handle.net/1834/2064 Registros recuperados: 8 Primeira ... 1 ... Última

Empresa Brasileira de Pesquisa Agropecuária - Embrapa Todos os direitos reservados, conforme Lei n° 9.610 Política de Privacidade Área restrita		Embrapa Parque Estação Biológica - PqEB s/n° Brasília, DF - Brasil - CEP 70770-901 Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco