Análise de captura de Anomalocardia brasiliana (GMELIN, 1791) em um estuário do Nordeste do Brasil

Abstract

The estuaries are zones of transitions or ecotones considered one of the most important coastal environments because they are biologically and ecologically seen as the most productive areas of the Earth. They harbor a diversity of organisms, most of which are captured by human populations for food and commercial purposes, such as mollusks. Thus, the objective of this study was to analyze techniques for capturing A. brasiliana, by the catfishers of the Mamanguape estuary (ERM), Paraíba, Brazil, in relation to selectivity, productivity and efficiency, comparing the results under the influence of tidal movements. The qualitative data were obtained by the non-member participant observation technique, in which the scavengers were monitored during the tide periods of Sizígia and Quadratura. Each collection month was used at least four days of collection. The total production of shellfish without shells was 608.3 kg, of this total, 400 kg were obtained by means of the jereré technique and 208 kg for manual technique. The CPEUs (capture per unit effort) of the techniques had a significant difference (P <0.001). Regarding the selectivity, there were no significant differences between the techniques, but between the tides (P <0.001) independent of the capture techniques. The use of the jereré technique was more efficient, which presented daily production equivalent to twice the manual. Regarding the relation of the tides and the production in kg, the samples collected in the tides of Sizígia presented a higher yield of shellfish weight without the valve, confirming information reported by the fishermen.