ŞAHİN SAKA, Kürşat FIRAT, H. Okan KAMACI, Ergun BÜKE

The effect of temperature on embryonic development of the red porgy (Pagrus pagrus) eggs

Fangri (Pagrus pagrus) yumurtalarında sıcaklığın embriyolojik gelişim üzerindeki etkisinin saptanması için 10 (8,10,12,14,16,18,20,22,24 and 26°C) farklı sabit su sıcaklığı denenmiştir. Embriyonik gelişim 14-22°C'ler arasında tamamlanmıştır. Regresyon analizleri sonucunda, embıiyonik gelişim ile inkübasyon sıcaklığı arasında negatif ilişki olduğu gözlenmiştir. 8 ve 26°C su sıcaklıklarında hücre bölünmesi meydana gelmemiştir. 10°C'de döllenmeden 5:45 dakika sonra 8 blastomer safhasında total ölüm gözlenmiştir. Bunun yanı sıra, 12 °C'de döllenmeden 42:45 saat sonra % gastrula safhasında ve 24°C'de döllenmeden 4 saat sonra erken blastula safhasında toplam ölümler tespit edilmiştir.

Anahtar Kelimeler:

sıcaklık, balık yumurtası, embriyonik gelişim, üreme

Fangri (Pagrus pagrus) yumurtalarının embriyolojik gelişiminde sıcaklığın etkisi

In this study, ten different constant water temperatures (8,10,12,14,16,18,20,22,24 and 26°C) were used in order to determine relationships on effects of water temperature on embryonic development of the red porgy (Pagrus pagrus) egg. Constant water temperatures between 14 and 22°C were found to support successful embryonic development. According to regression analysis, a negative relationship between the rate of embryonic development and incubation temperature was observed. While embryonic development was completed within this range (14-22°C), there was no cell division at water temperatures of 8 and 26°C. Total mortalities were observed at 8 blastomer stage in 10°C at 5:45 h after fertilisation. Also, in middle gastrula stage at 12°C, it was determined 42:45 h after fertilisation and 4 h in early blastula stage at temperature of 24°C after fertilisation.

Keywords:

temperature, fish eggs, embryonic development, reproduction,

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