Osteological Development Of Jaw In Cultured European Seabass

Osteological Development of Jaw in Cultured European Seabass (Dicentrarchus Labrax) Larvae

For the article titled “Osteological development of jaw in cultured european seabass (Dicentrarchus labrax L. 1758) larvae” published by Ege University Faculty of Aquaculture in 2008, we shared the knowledge and possibilities of our company with our esteemed university during the research period. Our company has always been and will continue to be open to support requests from related faculties of our universities. We are proud to be able to contribute to the development of scientific methods and conducting researches, and to share our knowledge, with the awareness that our industry will progress in this way in national and global terms and reach the levels that can meet the increasing nutritional needs of the world population.

Below, you can find the research article which we contributed with our facilities’ resources that our company has:

E.U. Journal of Fisheries & Aquatic Sciences 2008
Volume 25, Issue (2): 111–115

© Ege University Press
ISSN 1300 – 1590
http://jfas.ege.edu.tr/

Osteological development of jaw in cultured european seabass (Dicentrarchus labrax L. 1758) larvae*

*Deniz Çoban, Cüneyt Suzer, H. Okan Kamacı, Nurcan Ertan, Şahin Saka, Kürşat Fırat
Ege University Faculty of Fisheries, Aquaculture Section, 35100, Bornova, İzmir, Türkiye

Acknowledgements: We thank Akvatek Aquaculture Inc. and its employees for sharing the unlimited use of all their technical resources and their support.

Abstract

The development of the jaw, where is in oral cavity, in European seabass, Dicentrarchus labrax, (L. 1758), larvae was examined from 1 to 42 days post-hatching during the early ontogeny under well-defined intensive environmental culture conditions. During the study, specimens were examined on per 3 days until the end of weaning. Preparation techniques included fixation in formalin, trypsin clearing and staining with alcian blue and alizarin red S. At hatching, D. labrax were devoid of any cephalic elements in oral cavity. At 3.8 mm total length (TL), Meckel’s cartilage appeared first. At 4.6 mm TL, the trabecular bars, palato-quadrate and the ethmoid plate showed. At 5.4 mm TL, hyoid bar, maxillary, basibranchial and branchial basket constituted the bottom of the oral cavity. At 7.9 mm TL, the first signs of dentaries were presented as the premaxillary. At 11.4 mm TL, there were no sign of ossification on the premaxillary and the dentary. At 15.8 mm TL, tip of the premaxillary and the dentary were start of ossification while the cartilaginous structures continue to regress. The development pattern of jaw in oral cavity found in D. labrax is quite similar to that described for other Sparid species. 

Key Words: Seabass, Dicentrarchus labrax, Jaw Development, Osteology, Larvae.

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