The Israeli Journal of Aquaculture Bamidgeh 57(2), 2005, 105-114   
 
EFFECT OF TEMPERATURE ON EMBRYONIC DEVELOPMENT IN SHARPSNOUT SEABREAM (DIPLODUS PUNTAZZO) EGGS

Kursat Firat*, Sahin Saka and Osman Ozden 
 
Department of Aquaculture, Faculty of Fisheries, Ege University, 351000 Bornova, Izmir, Turkey
 
(Received 10.9.04, Accepted 25.1.05)

Key words: Diplodus puntazzo, egg, embryonic development, sharpsnout seabream, temperature
 
Abstract


Embryonic development of sharpsnout seabream (Diplodus puntazzo) was studied at eleven water temperatures (two degree intervals from 12 to 32C). Embryos successfully developed at temperatures of 16-28C. Cells did not divide at the temperature extremes of 12 and 32C. Total mortality was observed by the 128 cleavage stage at 14C and all eggs were dead by the time the embryos extended 2/3 of the internal circumference of the egg at 30C. There was an inverse relationship between incubation temperature and the rate of embryonic development.


* Corresponding author. Tel: +90-232-3434000/5221, fax: + 90-232-4636050, e-mail: kfirat@sufak.ege.edu.tr

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