A pesca de robalo na reserva extrativista de Canavieiras, Bahia

Abstract

The species of the family Centropomidae, are constantly captured in estuarine regions, with the most frequent species being C. parallelus and C. undecimalis, popularly known as sea bass. This work aimed to analyze the bass fishing in the Extractive Reserve of Canavieiras, Bahia. The specimens were collected monthly, from February 2016 to March 2017, in the RESEX Canavieiras estuary. The fishing gear used was the net, being the most frequent used by fishermen in the community. During the study period, 1,013 individuals were captured, including 156 specimens of sea bass, of which 114 specimens were coconut or peva sea bass, Centropomus parallelus and 42 specimens of arrowhead or camburimaçu, Centropomus undecimalis. The months of greatest catches were September, August and November, in the total collections. The largest catches occurred in the brook of hope, the brook of butter, the orange river and the island of cattle. The coconut sea bass had a range of total length ranging from 16.4 to 45.0 cm, with the average total length over the period being 22.7 cm and the average furcal length of 19.9 cm. The average total weight was 123.3g, with the highest average total weight being verified in July, with 292.9g, while the lowest was verified in December, with 87.0g. The arrowhead had an amplitude of total length of 20.0 to 54.0cm, with the average total length over the period being 27.9cm and the furcal length of 25.2cm. The average total weight was 186.9 g, with the highest average total weight being verified in September, with 717.5 g and the lowest average total weight in July, with 82.5 g. Through the weight-length relationship it was possible to observe positive allometric growth for C. parallelus, and negative allometric growth for C. undecimalis, with allometric coefficient of 3.1 and 2.9 respectively. After analyzing the catch per unit of effort - CPUE it was found that the highest rates were in March, September and November. Artisanal fishing in the area that encompasses the RESEX de Canavieiras is an activity characteristic of the region and intended as a rce of income, however frequent studies in this conservation area are necessary, as through them it is possible to provide subsidies for the sustainability of these fishing resources.