Abstract

The extraction of estuarine shrimp peneids stage is a fishery that generates a pressure on the coastal ecosystems of the intertropical zone, for which reason it is important to study the selectivity of the artisanal shrimp trawl net with "Chica" in the Gulf of Paria. The exploratory fishing was carried out between April and November 2008 on the north coast of the Gulf of Paria, using a peñero boats, powered by two outboard motors and a trawl of 11 m long and 2.5 cm light mesh in the codend. Is swept every set in the bottom at depths below 5 m for 30 min, although the network for recovering and separating the organisms in fish and crustaceans, which chilled samples were transferred to 3 kg INIA-S/NE in Cumana, Estado Sucre. In the laboratory were taxonomically identified and taken measures height and weight. Structures were built size shrimp Litopenaeus schmitti, catfish Cathorops spixii, sardines edentulus Cetengraulis and torroto Geyantremus luteus, using the logistic equation to determine the ranges and sizes of respective selection. The size range observed for the white shrimp varies between 60 and 235 mm and size of selection 50% SL was 139.28 mm. For fish size ranges were observed between 35 and 190 mm with a SL 50% smaller than 121 mm. The art used is rather selective because it retains a large number of organism, most have not reached a commercial size.

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