Papers by Antônio Olinto Ávila da Silva
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Continental Shelf Research, 2019
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ICES Journal of Marine Science, 2014
Generalized linear models were applied to identify factors affecting the capture rates (catch per... more Generalized linear models were applied to identify factors affecting the capture rates (catch per unit effort, cpue) of Xiphopenaeus kroyeri and to estimate time-series data with standardized abundance indices. The adjusted models revealed that the most powerful vessels (with greater HP) were up to 3.5 times more efficient than vessels with less powerful engines. The seasonal variation of the resource changed from year to year, most likely due to variations in the recruitment season and the timing of temporary fishing bans. The variation of cpue was similar between the northern and southern sectors of the study area. In these, X. kroyeri abundances increased in the years 1996, 1997, 2001 and 2002, while in the central sector, the cpue fluctuated with a period duration of approximately two years. During the period, the relative abundance of the species displayed neither a decreasing nor an increasing trend, indicating that this has been harvested at stable levels. However, X. kroyeri...
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This document reports the results of the bottom trawl surveys performed along the outer shelf and... more This document reports the results of the bottom trawl surveys performed along the outer shelf and upper slope of Southeastern and Southern Brazil covering a total area of 135000 km2, during cold and warm seasons as part of the wider scope REVIZEE Program (Living Resources of the Exclusive Economic Zone).The surveys were from Chuí - RS (34° 40’S) to Cabo Frio - RJ (23° S), between the 100m and 600 m isobaths with the research vessels “Atlântico Sul”, of the Federal University of Rio Grande and “Soloncy Moura”, of the IBAMA reaching the total of 95 days at sea in August-October of 2001 (winter to early spring) and February-June (late summer and autumn) of 2002 and 224 effective fishing hauls. The water temperatures close to the bottom were over 12°C at depth under 250 m, between 8°C and 14°C between 250 and 400m and under 10°C at over 400 m depth. Overall, temperatures ranged from 5.2°C to 18.5°C, and salinities between 34.2 and 36.0 ups and differed little between the same points alo...
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Acta Scientiarum. Biological Sciences, 2010
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Programa REVIZEE (Avaliação do Potencial Sustentável de Recursos Vivos na Zona Econômica Exclusiva Ministério do Médio Ambiente, disponível em: http://www. mma. gov. br/port/sqa/projeto/revizee/doc/textos/relespin. pdf, 2003
Resumo Entre agosto e outubro de 1996 e de abril a junho de 1997 foram realizados dois levantamen... more Resumo Entre agosto e outubro de 1996 e de abril a junho de 1997 foram realizados dois levantamentos com espinhel-de-fundo de cabo principal de aço, entre Chuí–RS (34 40'S) eo Cabo de São Tomé–RJ (22 S), no contexto das pesquisas de prospecção pesqueira demersal do programa REVIZEE no sul e sudeste do Brasil. Em 107 dias de mar com o barco pesqueiro Margus II foram realizadas 188 operações de pesca de espinhel com o lançamento de 187.908 anzóis. Foram capturados 22.910 peixes, sendo identificadas ...
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SIDALC - Servicio de Informacion y Documentacion Agropecuaria de las Americas.
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Books by Antônio Olinto Ávila da Silva
SIDALC - Servicio de Informacion y Documentacion Agropecuaria de las Americas.
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Papers by Antônio Olinto Ávila da Silva
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