Naslov
Development of mandibular arch in European sea bass, Dicentrarchus labrax (linneaus, 1758) from the hatchery "CENMAR", Croatia

Autori
Kužir, Snježana ; Kozarić, Zvonimir ; Nejedli, Srebrenka

Izvornik
Veterinarski arhiv (0372-5480) 74 (2004), 5; 321-330

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Fish ontogeny; ossification; mandibular arch; European sea bass; Dicentrarchus labrax

Sažetak
The mandibular arch ossification process in Dicentrarchus labrax L. is described from day 15 to day 80 post hatching (DPH). Data on this aspect of larval development were presented for both the DPH and average standard length (Ls). Samples were collected in the hatchery "CENMAR" near Zadar, Croatia. Preparation techniques included fixation in buffered formalin, trypsin clearing and staining with alcian blue and alizarin red. At 15 DPH (Ls 5.0 mm), there were no bony elements in mandibular arch. Ethmoid plate represented roof of the splanchnocranium, while Meckel's cartilage, hyosymplectic and cartilaginous palato-qudrates formed lateral walls. Cartilaginous basibranchial, hyoid bar and branchial basket constituted the bottom of the oral cavity. The first noticed bony elements were maxillaries (20 DPH, Ls 5.9 mm), followed by premaxillaries and dentaries (25 DPH, Ls 7.9 mm) - all with dermal (membranous) ossification. Ossification of other mandibular arch elements (angular, quadrate, retroarticular, palatine end ectopterygoid bone) was noticed at 38 DPH, Ls 14.5 mm. Pharyngeal jaws and teeth on premaxillaries and dentaries were noticed at the same time. Ossification process of the above mentioned elements (particularly quadrate bone) seems to be finished at 80 DPH, Ls 32.2 mm. The results are discussed in view of the ontogeny process connected with vital requirements to environment.

Izvorni jezik
Engleski

Znanstvena područja
Biologija, Veterinarska medicina

POVEZANOST RADA