Volume 62

Ecological indicators of fish species captured by the artisanal fisheries trawlers shrimp in the Gulf of Paria

Marval Rodriguez, A.L,; Quilarque, E,; Altuve, D,; Vizcaino, G,; Gil, H,; Maza,J,; Boada, J.
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Date: November, 2009

Pages: 120-123

Event: Proceedings of the Sixty -Second Annual Gulf and Caribbean Fisheries Institute

City: Cumaná

Country: Venezuela


The Gulf of Paria is an area inhabited by a large number of species, which are affected by the artisanal shrimp trawl. For this reason we evaluated the ecological indices of fish species caught by this fishery in the northern coast of the Gulf of Paria. The exploratory fishing was carried out between April and November 2008 at three stations located between Yaguaraparo and Irapa; peñero using a boat powered by two outboard motors and a trawl net. Is swept every set in the bottom at depths less than 5 m for 30 min, recovering the network to separate the organisms in fish and crustacean. Chilled samples were transferred to 3 kg INIA-S/NE, where he proceeded to the taxonomic identification of each organism. Were captured a total of 8.370 specimens from 60 species. The monthly number of species caught varied between 26 and 42. In the months of September and May, collected the largest number of organisms; October being the month with the greatest dominance of species (ID = 92.26%). The diversity index, calculated based on the number of individuals ranged between 1.22 and 4.11 bits/ind-1 and equitability between 0.28 and 0.85, showing a similar behavior both indexes. Station 2 had the highest diversity of organisms (3.06 bits/ind-1), and Station 1 of the lowest values (2.60 bits/ind-1). The shrimp trawl net is very effective and less selective, which captures a large number of species using the area for feeding, breeding, nesting and protection from potential predators.

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