ON BOARD TRAWL SAMPLING IN THE THERMAIKOS GULF. SEASONAL QUANTITATIVE AND QUALITATIVE COMPOSITION OF THE CATCH

The purpose of this work is to describe the qualitative and quantitative composition of the catch in Thermaikos Gulf, using a special bottom trawl. It is also tested if there is a statistically important differentiation in the abundance between the inner gulf, where the fishing with trawlers is not allowed and the outer gulf, where the fishing with trawlers is allowed.