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Turkish Journal of Fisheries and Aquatic Sciences 2015, Vol 15, Num, 3     (Pages: 737-740)

Effect of Temperature on Reversed Asymmetry in Hatchery-Reared Flounder (Platichthys flesus luscus Pallas, 1811)

İlhan Aydın 1 ,Ercan Küçük 1 ,Temel Şahin 2 ,Metin Kumlu 3

1 Central Fisheries Research Institute, Trabzon, Turkey
2 Recep Tayyip Erdoğan University, Turgut Kıran Maritime College, Rize, Turkey
3 Çukurova University, Faculty of Fisheries, Adana, Turkey
DOI : 10.4194/1303-2712-v15_3_17 Viewed : 2260 - Downloaded : 1537 The effects of four different rearing temperatures (15, 18, 21, and 24ºC) on reversed asymmetry and larval development in the hatchery-reared larvae of the flounder, Platichthys flesus luscus, were investigated in this study. Incidence of reversed asymmetry (sinistral forms) were found to be 13.0, 10.4, 11.6 and 21.3% at 15, 18, 21 and 24ºC, respectively. The sinitrality rate was not affected by temperature between 15°C and 21°C, while this incidence was significantly higher at 24°C (P<0.05). At completion of the metamorphosis (day 60), juvenile final total length and survival rates were 18.4, 19.9, 18.8, 15.7 mm and 13.5, 9.0, 10.6, 9.2% at 15, 18, 21 and 24°C, respectively. The results of the present study strongly suggest that rearing temperature not only influences growth and survival during the larval development but also reversed asymmetry in the flounder at the metamorphosis, especially at high temperatures. Keywords : Flounder, Platichthys flesus luscus, temperature, reversed asymmetry