Temel ŞAHİN, Erdinç GÜNEŞ, Hamza POLAT, İlhan AYDIN

The reproductive performance of wild and hatchery-reared flounder, Platichthys flesus luscus, in the southern Black Sea coast

Doğadan yakalanan ve kültürü yapılan pisi, Platichthys flesus luscus anaçlarında yumurtlama zamanı, toplam yumurta verimi, yumurta çapı, döllenme ve çıkış oranı belirlenmiştir. Doğadan yakalanan 18 balığın ortalama ağırlığı 452,8 ± 193,2 g dır. On sekiz adet kültür balığının ortalama ağırlığı ise 138,9 ± 47,4 g dır. Yumurtlama 22 Ocak 10 Nisan arasında 79 gün devam etmiştir. Ortalama toplam yumurta verimi doğadan yakalanan balıklar için 285 ± 157,9 × 103 ve kültür balıkları için ise 115,6 ± 53,6 × 103 yumurta/anaçtır. Döllenme ve çıkış oranları sırası ile doğadan yakalanan grup için % 38,2 ± 17,0, % 62,3 ± 24,1 ve kültür balıkları için % 45,3 ± 22,7, % 54,8 ± 26,5 olarak belirlenmiştir. Sonuç olarak, doğadan yakalanan ve kültürü yapılan pisisinin üreme performansı benzer olduğu görülmüştür.

Güney-doğu Karadeniz’deki doğal ve kültür pisisi (Platichthys flesus luscus)’nin üreme performansı

The spawning period, total fecundity, egg size, and fertilization and hatching rates of wild and hatchery-reared flounder, Platichthys flesus luscus, are investigated in this report. Wild and hatchery-reared broodstock consisted of 18 females (452.8 ± 193.2 g) and 17 females (138.9 ± 47.4 g), respectively. The spawning period lasted 79 days, from 22 January to 10 April. Mean total fecundity was 285 ± 157.9 × 103 per female for wild broodstock while it was 115.6 ± 53.6 × 103 eggs for hatchery-reared broodstock. The fertilization and hatching rates were 38.2 ± 17.0% and 62.3 ± 24.1% for wild and 45.3 ± 22.7% and 54.8 ± 26.5% for hatchery-reared broodstock, respectively. The reproductive parameters of wild and hatchery-reared flounder in the Black Sea were similar.

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