Spatio-temporal Distribution and Population Dynamics of the Red Mullet Mullus barbatus Linnaeus, 1758 from the South-east Black Sea

Year 2023, Volume: 8 Issue: 4, 720 - 727, 31.12.2023

Hatice Onay Göktuğ Dalgıç Yusuf Ceylan

https://doi.org/10.35229/jaes.1378446

Abstract

A total of 2930 Mullus barbatus individuals collected from the Southeastern Black Sea coast between March 2017 and April 2018 were investigated regarding growth, mortality rates and the distribution determined by depth and season. M. barbatus is abundant along of 30-45 m depth in winter. Total length-weight relationship was determined as W=0.005L3.2344. Von Bertalanffy growth parameters for all individuals were calculated as L∞=28.19 cm, K=0.16 years-1, t0=-0.144 years. The maximum age was 5 years. The total length at 50% maturity was estimated as 11.63 cm in males and 11.68 cm in females. Exponential coefficients of natural mortality, total mortality, and fishing mortality rate of red mullet are estimated as 0.33 year-1, 1.001 year-1 and 0.67 year-1, respectively. The exploitation rate of population was calculated as 0.66 year-1. The fact that exploitation rate is above 0.5 may reflect a high fishing pressure on stock.

Keywords

Black Sea, Exploitation rate, Fish population, Mullidae, Mortality

Supporting Institution

Recep Tayyip Erdoğan Üniversitesi

Project Number

FDK-2017- 754.

Thanks

We appreciate the crew members of the Karadeniz Araştırma Gemisi and MSc Erhan Ozturk and Muhammet Emanet for their help in laboratories.

Güneydoğu Karadeniz’ de Barbunya (Mullus barbatus Linnaeus, 1758) balığının Mekansal-Zamansal Dağılımı ve Popülasyon Dinamiği

Abstract

Mart 2017 ile Nisan 2018 arasında Karadeniz'in Güneydoğu sahilinden toplamda 2930 Mullus barbatus bireyi büyüme, ölüm oranları ve derinlik ile mevsime göre belirlenen dağılımları açısından incelendi. M. barbatus kış aylarında 30-45 m derinliklerinde daha yoğundur. Toplam uzunluk-ağırlık ilişkisi W=0,005L3,2344 olarak belirlendi. Tüm bireyler için Von Bertalanffy büyüme parametreleri L∞=28,19 cm, K=0,16 yıl-1, t0= -0,144 yıl olarak hesaplandı. Maksimum yaş 5 yaştır. Yüzde elli olgunluğa ulaşma toplam uzunluğu erkekler için 11,63 cm, dişiler için ise 11,68 cm olarak tahmin edildi. Barbunya balığı için doğal ölüm, toplam ölüm ve avcılık ölüm oranları üssi katsayıları sırasıyla 0,33 yıl-1, 1.001 yıl-1 ve 0,67 yıl-1 olarak hesaplandı. Popülasyonun işletme oranı 0,66 yıl-1 olarak hesaplandı. İşletme oranı 0,5'in üzerinde olması, stok üzerinde yüksek bir av baskısı olduğunu yansıtabilir.

Keywords

Balık popülasyonu, Karadeniz, İşletme oranı, Mullidae, Mortalite

Project Number

FDK-2017- 754.

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