Fish assemblage patterns in a subtropical estuary in southern Brazil

Abstract

In this study, the relationship between fish assemblage structure and environmental factors was analyzed in a bay in southern Brazil. Fish were collected every two months between February and December 2002 at six sampling sites using bottom trawl nets. Abiotic data (salinity, temperature, rainfall, and depth) and biotic data (number of individuals, biomass, and total length of individuals from each species) were obtained. In total, 56 fish species representing 27 families were collected. Assemblage structure varied with seasonality, as was evidenced by the variation in temperature and rainfall in each season. Catches showed a high abundance of demersal fishes, particularly Genidens genidens, Eucinostomus gula, and E. argenteus.

Análise Interanual Da Assembleia De Peixes Estuarinos Após Impacto De Construção De Obra Rodoviária No Litoral Sul Do Brasil

“…Os marinhos visitantes tipicamente entram nos estuários apenas nas regiões próximas à desembocadura, onde as salinidades são de aproximadamente 35 (Elliott et al, 2007), contudo, a salinidade não é o único fator determinante (e.g.) na distribuição das guildas de uso de estuário (Passos et al, 2013;Nakayama et al, 2020;Cattani et al, 2022).…”

Fishing profile and commercial landings of shark and batoids in a global elasmobranchs conservation hotspot

“…The effects of the hydrological cycle on fishing activity are evident and characterize complex processes involving fleet operations and catch composition (Bentes et al 2012). Marine species are caught more intensely during dry season, leading to an increased salinity in the coastal areas where the majority of smallscale fisheries operates (Cattani et al 2022, Gamarra et al 2023.…”