Growth and Reproductive Characteristics of the Thinlipped Grey Mullet, Liza ramada (Risso, 1826) Inhabiting in Gökova Bay (Muğla), the Southern Aegean Sea, Turkey

Abstract

In this study, the determination of growth and reproductive characteristics of the thinlipped grey mullet (Liza ramada) living in the Gökova Bay (Mugla) were carried out. For this purpose, 120 individuals were obtained by monthly sampling during the period between June 2007 and May 2008. The total length ranged from 154 mm to 480 mm and weight varied between 35.0 and 505.5 g. Age groups varied between I and VI for this species in Gökova Bay, with the second and third year-classes dominating. Sex ratio was 1.26:1 (M:F), corresponding to 55.84% male and 44.16% female of the population (P>0.05, χfor all individuals.489.19[1−e−0,21(t+1,01)] by using the data of 120 L. ramada specimens. Significant statistical differences in condition factors between age classes and sexes were not found (P>0.05, t-test). Monthly examination of condition factor showed that similar condition cycle is evident in both sexes, peaking in August (1.135 for males and 1.136 for females). Spawning period of this species in Gökova Bay occured between October and December, showing a peak in November

Keywords

• Gökova Bay
• Liza ramada
• growth
• condition
• gonadosomatic index

Güney Ege Denizi, Gökova Körfezi ( Muğla)’nde Yașayan Liza ramada (Risso, 1826)’ nın Büyüme ve Üreme Özellikleri

Abstract

Bu çalıșmada, Güney Ege Denizi, Gökova Körfezi (Muğla)’de yașayan Liza ramada’ nın büyüme ve üreme özelliklerini belirlemek amacıyla, Haziran 2007 ve Mayıs 2008 tarihleri arasında aylık olarak örneklenen 120 adet birey incelenmiștir. İncelenen balıkların total boyları 154– 480 mm; ağırlıkları 35.0– 505.5 gr arasında değișmiștir. Gökova Körfezi’nde bu tür için yaș grupları, II. ve III. yaș grupları en fazla bireyle temsil edilerek, I. ila VI. arasında değișmiștir. Populasyonun % 44.16’ sının diși; % 55.84’ sının da erkek bireylerden olușmuș ve eșey oranı 1.26:1 (E:D) olarak saptanmıștır (p0.05, t-test). Her iki eșey için ortalama kondisyon faktörü (K) değerlerinin aylık değișimlerinin benzer olduğu ve Ağustos ayında (erkekler için 1.135; dișiler için 1.136) pik yaptıkları belirlenmiștir. Gökova Körfezi’deki bu türün yumurtlama periyodu Kasım ayında pik yaparak, Ekim-Aralık arasında olușmaktadır.

Keywords

• Gökova Körfezi
• Liza ramada
• büyüme
• üreme

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