Age, growth and reproductive biology of the saddled seabream (Oblada melanura) in the North Aegean Sea, Eastern Mediterranean

• Autorzy: Daban Ismail Burak , Ismen Ali , Ihsanoglu Mukadder Arslan , Cabbar Koray

Identyfikatory

DOI

10.1515/ohs-2020-0002

• Języki publikacji: EN

Abstrakty

EN

This study determines the length distribution, length–weight relationship, age, growth parameters, mortality rate, sex ratios, length at first maturity and reproduction of saddled seabream (Oblada melanura) collected monthly by fishermen around the Northern Aegean Sea between November 2017 and October 2018. The length–weight relationship was calculated as W=0.0091×L ^3.11 (R ²=0.95) and positive allometric growth was found. The condition factor and GSI varied between 0.81–1.58 and 0.01–9.61, respectively. The spawning season extended from May to July and peaked in June. Total lengths at 50% maturity were 18.97 cm for males and 18.83 cm for females. Parameters of the von Bertalanffy growth equation were: L∞ =29.91 cm, K =0.27 per year, t₀=−0.82 year and age varied between 1 and 8. The instantaneous rates of total mortality (Z) and natural mortality (M) were 1.36 and 0.58 per year, respectively. Rates for fishing mortality F and exploitation E were 0.78 and 0.57 per year, respectively. The mean absolute fecundity (F) was 117 075±23 243 oocytes, ranging from 19130 to 470 132.

Słowa kluczowe

EN

fecundity; mortality; saddled seabream; spawning; von Bertalanffy

• Wydawca: Institute of Oceanography University of Gdańsk
• Czasopismo: Oceanological and Hydrobiological Studies
• Rocznik: 2020
• Tom: Vol. 49, No. 1
• Strony: 13--22
• Opis fizyczny: Bibliogr. 44 poz., tab., wykr.

Twórcy

autor

Daban Ismail Burak

• Department of Marine Science and Technology, Canakkale Onsekiz Mart University, Canakkale, Turkey

autor

Ismen Ali

• Department of Marine Science and Technology, Canakkale Onsekiz Mart University, Canakkale, Turkey

autor

Ihsanoglu Mukadder Arslan

• Department of Marine Science and Technology, Canakkale Onsekiz Mart University, Canakkale, Turkey

autor

Cabbar Koray

• Department of Marine Science and Technology, Canakkale Onsekiz Mart University, Canakkale, Turkey

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