Determination of some population parameters and reproduction period of whiting (Merlangius merlangus euxinus Nordmann, 1840) on the Trabzon-Yomra coast in the eastern Black Sea

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Cıloglu E. , Sahin C. , Zengın M. , Genc Y.

TURKISH JOURNAL OF VETERINARY & ANIMAL SCIENCES, cilt.25, sa.6, ss.831-837, 2001 (SCI İndekslerine Giren Dergi) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 25 Konu: 6
  • Basım Tarihi: 2001
  • Sayfa Sayıları: ss.831-837


In this study, the growth. age composition, sex ratio, condition factor and spawning period of whiting (Merlangius merlangus euxinus Nordmann, 1840) on the eastern part of the Trabzon-Yomra coast were investigated. During the study, a total of 1730 fish (1122 females and 608 males) ranging in age from group I to IX were examined. The chi squared test was used to calculate ratios between female and male specimens and no significant difference was found (P<0.05), and the relative growth length and the relative growth weight differences between females and males were not found to be statistically significant (P<0.056). The calculated length-weight relationships for females and males are as follows, respectively: W=0.0037L(3.259), W=0.0042L(3.206). Von Bertalanffy growth constants were estimated to be L-infinity=52.500 cm, K=0.092, t(o)=-1.759 for females and L-infinity=37.190 cm, K=0.114, t(o)=-2.390 for males. The results of this investigation show that reproduction takes place throughout the year with a peak from January to August and fish reach sexual maturity at age I.