Early Life History of Cultured Common Dentex (Dentex dentex L. 1758)

Authors : Kürşat FIRAT, Şahin SAKA, Deniz ÇOBAN

Pages : 735-741

View : 25 | Download : 9

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :The early life history of common dentex insert ignore into journalissuearticles values(Dentex dentex L. 1758); was investigated under culture conditions. The percentage of fertilized buoyant eggs was generally high, between 80 and 85%. Egg diameters ranged from 0.938 to 1.089 mm. Larval development, growth, and some morphological changes were described from day 0 to day 32. Larvae were reared intensively in 6 m3 tank under a constant photoperiod insert ignore into journalissuearticles values(24 h light);, and fed initially on rotifers, followed by Artemia nauplii and Artemia metanauplii. A green water technique was applied using Nannochloropsis sp., Chorella sp., and Isochrysis sp. at a density of 150,000-200,000 cells ml-1. First feeding began on day 6. Larvae completed yolk absorption on day 8 after hatching at 136 ºC cumulative temperature insert ignore into journalissuearticles values(day/degrees);. Swimbladder inflation occurred between day 5 and day 7 post-hatching. Notochord flexion started on day 23 at 7.01 mm total length. Metamorphosis from larval to juvenile stage occurred between days 23 and 32 post-hatching at a mean total length of 12.7 mm.
Keywords : Dentex dentex, common dentex, larval development, metamorphosis, morphology