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Age, growth and reproduction of European hake (Merluccius merluccius (Linn., 1758)) in the Central Aegean Sea, Turkey

Published online by Cambridge University Press:  05 January 2015

Ozan Soykan ,
Akin T. İlkyaz ,
Gülnur Metın  and
H. Tuncay Kinacigıl
Ozan Soykan*
Affiliation:
Faculty of Fisheries, Ege University, 35100 Bornova, İzmir, Turkey
Akin T. İlkyaz
Affiliation:
Faculty of Fisheries, Ege University, 35100 Bornova, İzmir, Turkey
Gülnur Metın
Affiliation:
Faculty of Fisheries, Ege University, 35100 Bornova, İzmir, Turkey
H. Tuncay Kinacigıl
Affiliation:
Faculty of Fisheries, Ege University, 35100 Bornova, İzmir, Turkey
*
Correspondence should be addressed to:O. Soykan, Faculty of Fisheries, Ege University, 35100 Bornova, İzmir, Turkey email: ozan.soykan@ege.edu.tr
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Abstract

Specimens of European hake were collected by a traditional demersal trawl between July 2004 and June 2007 from İzmir Bay, Central Aegean Sea. A total of 2108 individuals were sampled during the study and the female: male sex ratio of the stock was 1:0.89. The length–weight relationship was W = 0.00341L3.24 (R2 = 0.994) for all individuals. A high gonadosomatic index was evident over most of the year but it was minimal from August to October. The estimated age composition was 1–5 years; the length and weight at infinity were calculated as L∞ = 54.53 cm and W∞ = 1455.77 g respectively. In addition, growth coefficient was found to be k = 0.315 y−1 and to = −0.223 y (R2 = 0.99). Total mortality ratio of the stock was calculated as Z = 1.539 y−1, while natural and fishing based mortality ratio were estimated as M = 0.579 y−1 and F = 0.959 y−1 respectively, with the exploitation ratio (E) of the stock estimated to be 0.624.

Keywords

European hakeMerluccius merlucciusAegean Sea
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 95 , Issue 4 , June 2015 , pp. 829 - 837
Copyright
Copyright © Marine Biological Association of the United Kingdom 2015 

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