The Israeli Journal of Aquaculture Bamidgeh 57(2), 2005, 131-140         
 
EMBRYONIC AND LARVAL DEVELOPMENT OF STRIPED SEA BREAM (LITHOGNATHUS MORMYRUS L 1758)

Kursat Firat*, Sahin Saka and H. Okan Kamaci

Aquaculture Department, Faculty of Fisheries, Ege University, 35440 Urla-Iskele, Izmir, Turkey
 
 
(Received 14.10.04, Accepted 28.1.05)

Key words: development, egg, Lithognathus mormyrus, striped sea bream, yolk-sac larvae
 
Abstract


Development of the embryonic and yolk-sac larvae of striped sea bream (Lithognathus mormyrus) was investigated. The average egg and oil globule diameters were 0.710.1286 mm and 0.180.1344 mm, respectively. The morula, gastrula, and neurula stages, somite formation, and hatching occurred 2:10, 5:15, 8:45, 9:45, and 21:15 hours after fertilization. The total length, yolksac volume, oil globule volume, digestive tube length, otolith diameter, head length, eye diameter, preanal and postanal lengths of newly hatched larvae were 1.740.03 mm, 0.120.008 mm3, 0.0030.0002 mm3, 0.470.02 mm, 548 m, 29911 m, 1578 m, 9110.3 m, and 8270.03 m. When the mouth opened 40 h after hatching, these measurements were 2.870.014 mm, 0.0030.001 mm3, 0.0010.0001 mm3, 0.610.015 mm, 1348 m, 37610 m, 22113 m, 1.020.03 mm, and 1.840.03 mm. During the first 18 hours, the larvae reached 84% of its final total length, the yolk sac was 65% absorbed, and the oil globule was 62% absorbed. Statistical analysis showed negative allometry for the relationships between total length and yolk-sac volume (r2 = 0.88) and total length and oil globule volume (r2 = 0.76), and positive allometry for the relationship between total length and digestive tube length (r2 = 0.89).


* Corresponding author. E-mail: kfirat@sufak.ege.edu.tr

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