Estimación del índice de abundancia relativa de la sardina (Sardinella aurita) del estado Nueva Esparta, Venezuela

Leo Walter González; Eduardo Núñez; Nora Eslava; Francisco Guevara

Authors

Leo Walter González Instituto de Investigaciones Científicas, Universidad de Oriente Núcleo Nueva Esparta, Boca del Río, isla de Margarita, Venezuela
Eduardo Núñez La Perla del Sur, C.A., Casitas del Guamache, isla de Margarita, Venezuela
Nora Eslava Instituto de Investigaciones Científicas, Universidad de Oriente Núcleo Nueva Esparta, Boca del Río, isla de Margarita, Venezuela
Francisco Guevara Instituto de Investigaciones Científicas, Universidad de Oriente Núcleo Nueva Esparta, Boca del Río, isla de Margarita, Venezuela

Keywords:

Sardinella aurita, fishery, Nueva Esparta, Venezuela

Abstract

The sardine (Sardinella aurita) is one of the main species targeted by the fisheries for small pelagic fish in Venezuela and is abundant along the coasts of the northeastern states of Sucre and Nueva Esparta. The maximum catch in Nueva Esparta was 107 thousand tons in 2004, while it decreased to 36 thousand tons in 2005 and, from 2006 onwards, a drastic decrease began, with annual fluctuations between 1 and 8 thousand tons over ten years, but a noticeable increase of 300% ≈ was observed from 2016 and 2017. Therefore, to understand the space-time evolution of the catchable biomass, the monthly and annual relative abundance index for sardine was estimated in 33 fishing grounds in Nueva Esparta between 2010 and 2017 based on catch and effort data provided by the Socialist Institute of Fishing and Aquaculture (INSOPESCA in Spanish) in Salamanca, and on interviews with owners of fishing vessels. The catch per unit of effort (CPUEi) was estimated using the Gulland equation, relating the catch (Ci) in tons and the fishing effort (Ei) in number of sets. The monthly values of the relative abundance index showed seasonality, and the annual values showed an upward curve, probably as a result of the temporary closure applied in 2014 and the favorable environmental conditions that benefited recruitment.

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