Les dinoflagellés toxiques sur Ulva rigida dans le golfe de Gabes

Abstract

The aim of this work is to study the spatio-temporal distribution of toxic dinoflagellates species on Ulva rigida in the shellfish production areas of Ruditapes decussatus in the Gulf of Gabes. Sampling for U. rigida was performed monthly from March 2015 to February 2016 in five stations. Our results revealed nine species of toxic dinoflagellates species on U. rigida. Their abundance was variable according to the stations and the months with a maximum of 4.46 × 103 ± 2.05 × 102 cells/ g fresh weight was observed at Gabes harbor during August. The proliferation of the most toxic dinoflagelltaes species was observed in summer.