زيست‌شناسي توليد مثل و تغذيه ماهي موتومنقوط در آب‌هاي ساحلي جزيره قشم‌

Reproduction and feeding of Buccaneer anchovy (Encrasicholina punctifer) from coastal waters of Qeshm Island, the Persian Gulf

Encrasicholina punctifer is one of the dominant small pelagic and economically most important fishes of the Persian Gulf, especially in Qeshm Islandʹs coastal waters. Specimens of the fish were collected monthly from the fishing acea in the coastal waters of Qeshm Island by random sampling method. Investigation on biological parameters of E. punctifer continued from April 2005 to March 2006. E. puncqfer is mainly caught by double-boat purse seine in this area. Reproductive studies showed that maturity season of the fish occur in August. The sex ratio fulfill the theoretical 1:I (P>O.05). LM50 was attained at a total length of 84 mm. The absolute fecundity wasestimated at 1217±331. Weshowed that the species is planktonivore, its diet consisted of a board spectrum of food types, but crustaceans dominated the food with copepods and their eggs, napliusand semidigested copepods constituting 54%of the diet The next major food groups found in the diet of the fish were Cyanophyceae 21%, Bacillariophyceae 11%, fish egg and scale 6%, Dinophyceae 4%, with Euglenahyceae, Chiorophyta, Dinoflagellates and others items consisting only 4% of the diet. Analysis of monthly variation in the stomach fullness indicated that feeding intensity fluctuated throughout the year, with the highest value in winter. Vacuity Indexindicated this specieswas of semi-voracious appetite fishes.