Ferhat KALAYCI, Osman SAMSUN, Necati SAMSUN

Seasonal variation in length, weight, and sex distribution of turbot (Scophthalmus maeoticus pallas, 1811) in the sinop region (Black Sea) of Turkey

Sinop bölgesinde kalkan solungaç ağlarıyla avlanan kalkan balıklarının, boy, ağırlık ve cinsiyet dağılımı mevsimlere göre incelenmiştir. Erkek ve dişi kalkan balıklarının boyları 23,9-69 cm ve 31,8-81 cm arasında değişmiştir. Ortalama toplam boy ve ağırlıklar dişi; 50,37 ± 0,42 cm, 2483,2 ± 74,7 g, erkek 45,93 ± 0,26 cm, 1711,2 ± 31.2 g ve tüm bireyler için 47,79 ± 0,24 cm, 2034,6 ± 38,5 g olarak belirlendi. Kalkan balıklarının hem boy hem de ağırlık değerlerinde mevsimlere göre farklar önemli bulundu. En yüksek ortalama boy ve ağırlık değerleri 49,56 ± 0,35 cm ve 2286,5 ± 59,6 g olarak ilkbahardaydı. İlkbahar ile diğer sezonlar arasında boy frekans dağılımı açısından önemli-fark vardı (P < 0,001). İlkbaharda kalkan balığının cinsiyet oranı farklı bulundu. Uzunluk ağırlık ilişkisi W = 0,0074 L322 olarak hesaplandı.

Türkiye'nin Sinop bölgesi'ndeki (Karadeniz) kalkan (Scophthalmus maeoticus pallas, 18119 balıklarının boy, ağırlık ve cinsiyet dağılımının mevsimsel değişimi

The length, weight and sex distribution of turbot caught by bottom turbot gill nets were investigated in relation with seasons in the Sinop region. The size ranges were 23.9-69 cm and 31.8-81 cm for male and female turbot, respectively. Mean total length and weight were 50.37 ± 0.42 cm and 2483.2 ± 74.7 g for females, 45.93 ± 0.26 cm and 1711.2 ± 31.2 g for males, and 47.79 ± 0.24 cm and 2034.6 ± 38.5 g for all individuals. Significant differences were found both in length and weight values of turbot between seasons. The highest mean length and weight values were 49.56 ± 0.35 cm and 2286.5 ± 59.6 g in the spring, respectively. The length frequencies of turbot differed significantly between spring and other seasons (P < 0.001). Significant differences were found for sex ratios of turbot. in spring. The length-weight relationship was estimated as W = 0.0074 L3'22.

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