Evaluación acústica de recursos pesqueros pelágicos frente a la costa sur ecuatoriana durante septiembre de 1995

Abstract

Nineteen lightday rectangular transects were made 16 in the area of the Gulf of Guayaquil (Ecuador), and 3 in an oceanic area at the west of the Gulf of Guayaquil, this was the second part of research cruise, oriented to the evaluation of the small pelagic fish stocks, it was made between september 14th and 27th, 1995. The SIMRAD EK-500 acoustic system was used, installed on board of the National Research Institute (INP) R/V Tohallí. At the same time, people from the INP's Fisheries Observer Program were on four private enterprises vessels, while they were fishing in the same Gulf's area. They also made the biological sample of the commercial catch, for future relation with the results from the acoustic evaluation. The V/R Tohallí principal catch was jack makarell (Trachurus murphy), with a length range of 30-34 cm FL, caught over the continental talud associated with 20º C SST area. There was estimated a total of ca., 280 000 t/km2 of small pelagic, with an average density of 30,8 t/km2; and a ca., 250 000 t of small pelagic with an average density of 27,1 t/km2, in the oceanic area.