Produção do camarão-rosa, Penaeus subtilis (Pérez-Farfante – 1967) e P. brasiliensis (Latreille - 1817), camarão-sete-barbas (Xiphopenaeus kroyeri - Heller, 1862) e o camarão-branco (Penaeus schmitti - Burkenroad, 1938) relacionados à pluviometria e sazonalidade na Barra de Sirinhaém, Pernambuco, Brasil

Abstract

The greatest expressiveness of shrimp catches on the coast of Pernambuco is concentrated in three main genera: pink shrimp, Penaeus subtilis (Pérez-Farfante – 1967) and P. brasiliensis (Latreille – 1817), seabob shrimp (Xiphopenaeus kroyeri - HELLER, 1862) and white shrimp (Penaeus schmitti - BURKENROAD, 1938) (ANDRADE, 2016). The objective of this monograph is to analyze the production of shrimp trawling and bycatch in terms of seasonality (winter/summer) and rainfall in Barra de Sirinhaém. The collections were carried out monthly from May 2017 to November 2018 on an artisanal double rig shrimp boat. To compare the production of shrimps and bycatch, a monthly ratio between catches was made by means of the average proportion, in kilograms. In order to determine the period of higher productivity of shrimps, the monthly proportion of kilograms caught was compared and correlated with rainfall data (Spearman - p<0.05), using the accumulated averages for better characterization of the rainy season and summer. The parametric test, the Student's t-test, was used to compare the means and obtain the level of significance. In order to determine a relationship between shrimp production and seasonality, the monthly proportion of kg of shrimp caught was compared and correlated with the winter and summer periods. The shrimp production peaks of the three species are related to the annual rainfall peaks. The shrimp production in August 2017 surpassed the bycatch. The capture of pink shrimp, was the one that obtained significant variation in relation to the production between seasons. The seabob shrimp was the one that obtained the highest catch in kilograms and the highest abundance in the summer. The results of this work were important to generate the first information on shrimp production related to rainfall and seasonality of the southern coast of Pernambuco, contributing to the detection of sites with richness of species relevant for capture, for the conservation of shrimp and bycatch species, in addition to assisting in the targeting of fishing and control measures.