Determination of Age, Growth and First Maturity Length of Whiting (Merlangius merlangus, Nordmann, 1840) in the Eastern Black Sea

Year 2021, Volume: 17 Issue: 4, 450 - 462, 01.12.2021

Cemalettin Şahin Erhan Öztürk Muhammet Emanet Yusuf Ceylan

https://doi.org/10.22392/actaquatr.809314

Cited By: 1

Abstract

In this study, it is aimed to determine some basic parameters of the whiting (Merlangius merlangus) population in the Eastern Black Sea. As a result of 12 months sampling conducted between March 2017 and February 2018, a total of 1579 whiting were examined and their lengths ranged between 7.5 cm and 32.6 cm and the mean length was 14.49 ± 2.85 cm and their weights ranged between 2.68 g and 279.58 g, the mean weight was 26.05 ± 20.95 g. Length-weight relationship was found W=0,0046*L3,173. While the sex ratio (female/male) was found to be 1,31: 1, because of the chi-square test the difference was found to be significant. Age distribution was between 0 and VIII, growth parameters were determined as L∞=31,87 cm, K=0,130, t0=-3,071, W∞=271,01 g and Ø'=2,123, respectively. The first sexual maturity length of total samples (L50) was calculated as 13.19 cm. In the light of the data obtained, it has been observed that there is a catch that negatively affects the sustainability of Eastern Black Sea whiting stocks.

Keywords

Merlangius merlangus, Eastern Black Sea, growth parameters, first sexual maturity length

Doğu Karadeniz’de Mezgit (Merlangius merlangus, Nordmann, 1840) Balığının Yaş, Büyüme ve İlk Eşeysel Olgunluk Boyunun Belirlenmesi

Abstract

Çalışmada, Doğu Karadeniz’deki Mezgit (Merlangius merlangus) popülasyonunun bazı temel parametrelerinin belirlenmesi amaçlanmıştır. Mart 2017- Şubat 2018 tarihleri arasında yapılan 12 aylık örneklemede elde edilen ve incelenen 1579 adet mezgit balığının boylarının 7,5 cm ile 32,6 cm arasında dağılım gösterdiği ve ortalama boyun 14,49±2,85 cm olduğu, ağırlıklarının ise 2,68 g ile 279,58 g arasında dağılım gösterdiği ve ortalama ağırlığın 26,05±20,95 g olduğu bulunmuştur. Boy-ağırlık ilişkisi W=0,0046*L3,173 olarak saptanmıştır. Cinsiyet oranı (dişi/erkek) 1,31:1 ve yapılan χ2 testi sonucu farkın önemli olduğu tespit edilmiştir. Yaş dağılımı 0-VIII arasında, büyüme parametreleri L∞=31,87 cm, K=0,130, t0=-3,071, W∞=271,01 g ve Ø'=2,123 olarak belirlenmiştir. Toplam örneklerde ilk eşeysel olgunluk boyu (L50=13,19 cm) olarak hesaplanmıştır. Elde edilen veriler ışığında Doğu Karadeniz mezgit stoklarının sürdürülebilirliğini olumsuz yönde etkileyen bir avcılık söz konusu olduğu görülmüştür.

Keywords

Merlangius merlangus, Doğu Karadeniz, Büyüme parametreleri, İlk eşeysel olgunluk boyu

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