Distribution spatiale de l'ichtyoplancton en été et en automne et conditions environnementales dans le golfe de Tunis

Abstract

Fish eggs and larvae were studied in relation to environmental conditions in the Gulf of Tunis in summer and autumn 2002. The averages of sea surface temperature were 25,51 degree C in the summer and 21,85 degree C in the autumn. The averages fish eggs and larvae abundances were more important in summer (360 eggs/10m super(2) and 244 larvae/10m super(2)) than in autumn (115 eggs/10m super(2) and 174 larvae/10m super(2)). The spatial distribution of both components of ichthyoplankton appear not directly correlated to temperature, salinity, dissolve oxygen, pH, chlorophyll a and the abundance of mesozooplankton. However, it seems that bathymetry influence this distribution.