Journals / Turkish Journal of Veterinary and Animal Sciences / 2006 / Cilt: 30 - Sayı: 4
The Effects of Different Light Intensities on Early Life Development of Sharpsnout Seabream (Diplodus puntazzo, Cetti, 1777) Larvae
- Pages
- 381–387
- DOI
- —
Abstract
The effect of different levels of illumination in the early life development stage of sharpsnout seabream (Diplodus puntazzo) larvae was examined. It was determined that illumination affected the relationships between total length and digestive tube length, total length and oil globule volume, and total length and yolk sac volume. The difference in the development of total length of the larvae kept in the dark and in other lighting conditions (30-450 lx) was significant (P < 0.05); however, it was determined that digestive tube development, yolk sac utilisation, and oil globule absorption differences of the larvae were not significant (P > 0.05). As for the covariance test, while the relationship between total length and oil globule volume was not significantly (P > 0.05) different between Group A (dark) and Group B (30 lx), it was significantly (P < 0.05) different between Group A (dark) and Group C (450 lx), and Group B (30 lx) and Group C (450 lx). Additionally, the relationship between total length and yolk sac volume was significantly different (P < 0.05) between Group A (dark) and Group B (30 lx), Group A (dark) and Group C (450 lx), and Group B (30 lx) and Group C (450 lx) (P < 0.05). However, the relationship between total length and digestive tube length was not significantly different (P > 0.05) between Group A (dark) and Group B (30 lx), Group A (dark) and Group C (450 lx), or Group B (30 lx) and Group C (450 lx). Survival rate was not significantly different among the 3 experimental groups (P > 0.05).
Özet
Bu çal›flmada farkl› yo¤unluktaki ›fl›kland›rman›n sivriburun karagöz (Diplodus puntazzo) larvalar›n›n erken yaflam geliflim evrelerine etkisi incelenmifltir. Ifl›kland›rman›n; total boy ve sindirim tübü uzunlu¤u, total boy ve ya¤ damlas› hacmi ve total boy ve vitellus kesesi aras›ndaki iliflkiyi etkiledi¤i bulunmufltur. Larvalar›n total boy geliflimindeki farkl›l›k karanl›kta ve di¤er ›fl›kland›rma koflullar›nda (30-450 lx) önemli bulunmufltur (P < 0,05). Bununla birlikte larvalar›n sindirim tübü gelifliminin, vitellus kesesi tüketilmesinin ve ya¤ damlas› emiliminin önemli olmad›¤›na karar verilmifltir (P > 0,05). Da¤›l›m testine göre total boy ve ya¤ damlas› hacminin iliflkisi grup A (karanl›k) ve grup B (30 lx) aras›nda önemli de¤ilken (P > 0,05), grup A (karanl›k) ve grup C (450 lx) aras›nda ve grup B (30 lx) ve grup C (450 lx) aras›nda önemlidir (P < 0,05). Bunlar›n yan›nda, total boy ve vitellus kesesi hacminin iliflkisi grup A (karanl›k) ve grup B (30 lx), grup A (karanl›k) ve grup C (450 lx) ve grup B (30 lx) ve grup C (450 lx) aras›nda önemli bulunmufltur (P < 0.05). Bununla birlikte total boy ve sindirim tübü uzunlu¤u iliflkisi grup A (karanl›k) ve grup B (30 lx) aras›nda, grup A (karanl›k) ve grup C (450 lx) aras›nda ve grup B (30 lx) ve grup C (450 lx) aras›nda önemli bulunmufltur (P > 0,05). Deneme gruplar›nda (A, B ve C) yaflama oranlar›nda önemli derecede farkl›l›k bulunmam›flt›r (P > 0,05).