Farklı ışık yoğunluklarının kırma mercan (Pagellus erythrinus L., 1758) larvalarında gelişime olan etkileri

Bu çalışmada, kırma mercan (Pagellus erythrinus L., 1758) balığının larval döneminde (0-35 gün) 3 farklı ışık yoğunluğunun larval gelişime olan etkileri incelenmiştir. Açık devre sistemde yeşil su üretim tekniği uygulanan 3 tekrarlı çalışmada; 10, 30 ve 100 lüks olmak üzere 3 farklı ışık yoğunluğu kullanılmış ve tanklar sırasıyla A, B ve C olarak adlandırılmıştır. Tamamen toz yeme geçişin yapıldığı 35. gün sonunda, larvalara ait total boy ve ağırlık gelişimleri incelendiğinde, en iyi total boy 18.1±0.09 mm ve 84.33±2.41 mg ağırlık olarak, 30 lüks ışık yoğunluğunun uygulandığı B grubunda elde edilmiştir. Bu grubu 17.64±0.1 mm total boy ve 77.86±3.02 mg ağırlık değeri ile 100 lüks ışık yoğunluğunun uygulandığı C grubu ve 16.44±0.09 mm total boy ve 68.54±3.56 mg ağırlık değeri ile 10 lüks ışık yoğunluğunun uygulandığı A grubu izlemiştir. Total boy ve ağırlık gelişimi açısından, B grubu ile C grubu arasındaki fark önemsiz bulunmuştur (p>0.05). A grubu ile diğer gruplar arasındaki fark ise önemlidir (p0.05). Bunun yanında, yaşama oranları ise gruplara göre sırası ile %23.8, %39.6 ve %35.4 olarak saptanmıştır. Benzer şekilde, B ve C grupları arasındaki fark istatistik olarak önemsiz iken (p>0.05), A grubu ise diğer gruplardan farklıdır (p

Anahtar Kelimeler:

embriyonik gelişim, balık yavrusu, ışık yoğunluğu

Effects of light intensity on larval development in common pandora (Pagellus erythrinus L., 1758) larvae

In this study, effects of three different light intensities (13, 30 and 100 lx) on larval development, swimbladder inflation and survival rate during larval period (0-35 day) in common pandora Pagellus erythrinus larvae were investigated. It is determined that the best total length development and weight was found as 18.01±0.09 mm and 84.33±2.41 mg in group B applied 30 lx light intensity. Also, these parameters were determined as 17.64±0.1 mm and 77.86±3.02 mg for group C applied 100 lx light intensity and 16.44±0.09 mm and 68.54±3.56 mg for group A applied 10 lx light intensity. In spite of significant differences in group A (p<0.05), there is no differences between B and C groups (p>0.05) in total length development and weight. Also, swimbladder inflation rates were determined as 82%, 85% and 88% respectively. Additionally, survival rates were calculated as 23.8%, 39.6% and 35.4% respectively. Similarly, differences between group B and C were not significant (p>0.05) whereas group A was significantly different than the other groups (p<0.05). No significant differences were found in all groups for swimbladder development and inflation rates (p>0.05).

Keywords:

embryonic development, fry, light intensity,

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