Distribuição espacial e temporal da guaiúba Ocyurus chrysurus (Bloch, 1791) (Teleostei, Lutjanidae) capturada pela frota pesqueira artesanal na região nordeste do Brasil

• Autor(a) principal: Nobrega, Marcelo Francisco de
• Data de Publicação: 2009
• Outros Autores: Kinas, Paul Gerhard, Ferrandis, Eduardo, Lessa, Rosangela Paula Teixeira
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da FURG (RI FURG)
• Texto Completo: http://repositorio.furg.br/handle/1/918
• topic: Spatial statistic; Generalized linear models; Northeastern fishes; Estatística Espacial; Modelos lineares generalizados; Peixes do nordeste

Spatial and temporal distribution of the yellowtail snapper Ocyurus chrysurus (Bloch, 1791) (Teleostei, Lutjanidae) caught by the artisanal fleet in northeastern Brazil. Fish sampling activities were carried out between 1998 and 2000, accompanying the landings of bottom-line operations of the artisanal fleet in northeastern Brazil. In order to standardize mean abundance indexes based on catch and effort data regarding Ocyurus chrysurus and identify mean abundance tendencies in time and space, generalized linear models (GLMs) were used on 1556 fisheries recorded during the study period. A standard relative abundance index (CPUE) for the most frequent vessel in catches was estimated, using factors and coefficients generated in the GLMs. Mean abundance indexes indicate that the species has a greater yield in the state of Bahia, with a tendency toward lower values at lower latitudes in the study area. The highest mean CPUE values were estimated between depths of 25 and 50 m. Non-linear models applied for abundance in relation to distance from the coast demonstrate that O. chrysurus has a differentiated aggregation structure depending on the extension of the continental shelf throughout northeastern Brazil. There was a decline in mean abundance indexes throughout the study period, which may have been caused by the considerable fishing effort targeting this species.