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, vol.25, no.6, pp.831-837, 2001 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 25 Issue: 6
  • Publication Date: 2001
  • Journal Name: TURKISH JOURNAL OF VETERINARY & ANIMAL SCIENCES
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, TR DİZİN (ULAKBİM)
  • Page Numbers: pp.831-837
  • Keywords: Trabzon-Yomra coasts, whiting (Merlangius merlangus euxinus), growth, condition factor, spawning
  • Recep Tayyip Erdoğan University Affiliated: No

Abstract

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.