Zarrad R.,National Institute of Marine science and Technologies INSTM Mahdia |
Garcia A.,Spanish Institute of Oceanography |
Alemany F.,Spanish Institute of Oceanography |
Jarboui O.,National Institute of Marine science and Technologies INSTM Sfax
Cahiers de Biologie Marine | Year: 2012
An ichthyoplankton survey was conducted on the eastern coast of Tunisia from the 10 th to 18 th August 2004 with the investigation of 68 stations. The sampling period corresponded to stratified summer conditions, with average SST 26.97°C. The thermocline was found between 25 and 50 m depth. The eastern coast of Tunisia was influenced by the water exchanges between the eastern and western Mediterranean. Anchovy eggs and larvae were a major component of the ichthyoplankton, representing 26 and 19% of the total mean fish egg and larval abundances, respectively. Their mean abundances were 108 eggs. 10 m -2 and 112 larvae. 10 m -2. The spawning areas were mainly located off the 100 m isobaths, with the maximum abundance occurring near the shelf break, as opposed to the inshore waters where anchovy eggs and larvae were practically absent. Depth was the main factor controlling the distribution of anchovy eggs and larvae. Larval transport from the spawning areas is made evident following southward to south-eastward directions.