Fishing diagnosis of the fish fauna in Cabiúnas coastal lagoon, Restinga de Jurubatiba, Rio de Janeiro State, Brazil

Abstract

The studies conducted in coastal lagoons, in the scope of the Long Duration Research Projects (Pesquisas Ecológicas de Longa Duração - PELD - site 5), aimed to find methodologies and approaches to be part of a continuous and standardized monitoring proposal of the fish fauna at the Parque Nacional da Restinga de Jurubatiba (PNRJ). For this, methodologies referring to sampling strategies (habitats, fishing gears and sub aquatic observation) were used to evaluate parameters of the community as richness, abundance, biomass and diversity of fish fauna. The fishing effort used with most gears in different habitats was not sufficient to stabilize the accumulated curves of species, possibly due to the captures were made during one climate period or month of the year. Values of biomass and standard length showed that the fishing gears used were appropriate to obtain heterogeneous samples of fish fauna in different habitats of the lagoon. Thus, taking into account netgears sizes (length, height and eye-mesh), its use on available habitats in the lagoon and fishing effort (number of moves or exposure time) it is possible to obtain reliable data to evaluate aspects related to population dynamics or community structure in coastal lagoons with similar characteristics.