Journals / Turkish Journal of Zoology / 2007 / Cilt: 31 - Sayı: 4
Seasonal Variation in Length, Weight, and Sex Distribution of Turbot (Scophthalmus maeoticus Pallas, 1811) in the Sinop Region (Black Sea) of Turkey
- Journal
- Turkish Journal of Zoology
- Pages
- 371–378
- DOI
- —
Abstract
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.
Özet
Sinop bölgesinde kalkan solungaç a¤lar›yla avlanan kalkan bal›klar›n›n, boy, a¤›rl›k ve cinsiyet da¤›l›m› mevsimlere göre incelenmifltir. Erkek ve difli kalkan bal›klar›n›n boylar› 23,9-69 cm ve 31,8-81 cm aras›nda de¤iflmifltir. Ortalama toplam boy ve a¤›rl›klar difli; 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 ± 0,24cm, 2034,6 ± 38,5 g olarak belirlendi. Kalkan bal›klar›n›n hem boy hem de a¤›rl›k de¤erlerinde mevsimlere göre farklar önemli bulundu. En yüksek ortalama boy ve a¤›rl›k de¤erleri 49,56 ± 0,35 cm ve 2286,5 ± 59,6 g olarak ilkbahardayd›. ‹lkbahar ile di¤er sezonlar aras›nda boy frekans da¤›l›m› aç›s›ndan önemli fark vard› (P < 0,001). ‹lkbaharda kalkan bal›¤›n›n cinsiyet oran› farkl› bulundu. Uzunluk a¤›rl›k iliflkisi W = 0,0074 L3.22 olarak hesapland›.