Age, growth, reproduction and feeding of John Dory, Zeus faber (Pisces: Zeidae), in the Saros Bay (North Aegean Sea)
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Tarih
2013
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Wiley-Blackwell
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
The age, growth, reproduction, sexual maturity and stomach content of John Dory (Zeus faber), caught in the Bay of Saros (North Aegean Sea) between September 2006 and September 2008, were investigated. The female-male ratio was 1.6 : 1. The total length of females ranged from 13.8 cm to 52.8 cm, and of males from 12.2 cm to 42.9 cm. The length-weight relationship was W = 0.0174*L2.936. Age data derived from vertebral centra readings were used to estimate the growth parameters of the von Bertalanffy equation. Growth parameters for females were L8 = 58.50 cm K = 0.11 year-1, t0 = -0.99 year and for males L8 = 45.01 cm, K = 0.13 year-1, t0 = -1.17 year. Maximum age was 18 years for females and 17 years for males. Length at first maturity for both females and males was 25.4 cm. Monthly values of the gonadosomatic index indicated that spawning occurred mainly in two peaks: one between January and June, and the other from August to September. Stomach content analysis showed the most-preferred prey to be Pisces (IRI% 97.3).
Açıklama
Anahtar Kelimeler
Length-Weight Relationships, East China Sea, L. 1758, Linnaeus, Fishes, Dory,John, Maturity, Habits, Waters
Kaynak
Journal of Applied Ichthyology
WoS Q Değeri
Q3
Scopus Q Değeri
Q3
Cilt
29
Sayı
1
