Détermination de l'effort optimal de chalutage benthique dans le golfe de Tunis

Abstract

The production models of Schaefer and Fox are used to determine the optimal effort of benthic trawlers in Tunis Gulf. The necessary data for the application of these models were collected from services of General Direction of Fishing and Aquaculture (DGPA). They are related to the two fisheries which exploit the benthic resources : trawling and coastal fishing and are extended over 12 years (from 1988 to 1999). The unit of effort selected, which gives the best correlation coefficient is the number at days at sea times : The day number at sea time the engine power of the fleet. In the current exploitation state, the optimal effort is estimated at 15 benthic trawlers with an average power of 450 cv.