The effect of lordosis severity on juvenile sea bass (Dicentrarchus labrax L., 1758) swimming performance

Authors : Fatih BAŞARAN, Hüseyin ÖZBİLGİN, Yeliz DOĞANYILMAZ ÖZBİLGİN

Pages : 413-419

View : 26 | Download : 10

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :The relationship between the lordosis severity and swimming performance in sea bass juveniles was investigated. In total, 149 experimental animals 110-130 days old that ranged from 1.44 to 3.44 g insert ignore into journalissuearticles values(meanTW ± SD: 2.41 ± 0.49 g); and 5.4 to 6.5 cm insert ignore into journalissuearticles values(meanTL ± SD: 6.03 ± 0.39 cm); were used in experiments to determine critical swimming speed insert ignore into journalissuearticles values(Ucrit); in water that was 14 ± 1 °C. Vertebral angle in normal healthy fish is 180°. The lordosis severity in abnormal fish is indicated by a reduction in this value. Vertebral angles insert ignore into journalissuearticles values(jº); of the experimental animals in this study ranged from 115° to 180° on the hemal region, and Ucrit ranged from 32.67 to 44.73 cm s-1. A significant reduction in Ucrit was observed as lordosis severity increased insert ignore into journalissuearticles values(decreasing vertebral angle);, showing that swimming performance was influenced by vertebral angle deformity in this species. This information has the potential to improve separation methods at commercial hatcheries.
Keywords : Key words Lordosis severity, swimming performance, Ucrit, sea bass