Age, growth and reproduction of European hake (Merluccius merluccius (Linn., 1758)) in the Central Aegean Sea, Turkey
Makaleler > Tam Makale · 2015
Yazarlar: Ozan SOYKAN, Akın Türker İLKYAZ, Gülnur METİN, Hasan Tuncay KINACIGİL
JOURNAL OF THE MARINE BIOLOGICAL ASSOCIATION OF THE UNITED KINGDOM, SCI Expanded İndekslerine Giren Dergi, Uluslararası, 2015, cilt 95, ss 829-837
DOI: 10.1017/s002531541400201x
Özet
Specimens of European hake were collected by a traditional demersal trawl between July 2004 and June 2007 from zmir 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=0.00341L(3.24) (R-2=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=54.53cm and W=1455.77g respectively. In addition, growth coefficient was found to be k=0.315y(-1) and t(o)=-0.223y (R-2=0.99). Total mortality ratio of the stock was calculated as Z=1.539y(-1), while natural and fishing based mortality ratio were estimated as M=0.579y(-1) and F=0.959y(-1) respectively, with the exploitation ratio (E) of the stock estimated to be 0.624.