Biological parameters and current status of European eel (Anguilla anguilla Linnaeus, 1758) from Asi River, Northeastern Mediterranean region, Turkey
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Tarih
2020
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Wiley
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
The biological characteristics of eels from the Asi River, Turkey, were assessed between December 2017 and November 2018. Eels were sampled monthly using fyke nets (operated by professional fishermen), yielding a total of 509 specimens. Total length and weight were measured, sex, age and maturity stages (silver or yellow eel) were determined. Catch Per Unit Effort (CPUE) was calculated for both biomass per unit effort and numbers caught on a monthly and annual basis. The length-weight relationships (LWRs) of silver and yellow eel was W = 0.009*TL3.22 (n = 262) and W = 0.0106*L-3.09 (n = 247), respectively. The age of the sampled fish ranged from year class II to VI. Von Bertalanffy growth parameters were estimated as L-infinity=69.25 cm, K = 0.43 1/year, t(0)= -0.41 and phi prime index ()= 3.31 for all samples. The overall eel fishing mortality rate (F) was 0.31 year(-1), and the exploitation and survival rates of silver stage eels were estimated with 30% and 39%, respectively.
Açıklama
2nd International Fisheries Symposium -- NOV 04-08, 2018 -- Girne, CYPRUS
Anahtar Kelimeler
Age-Determination, Growth
Kaynak
Journal of Applied Ichthyology
WoS Q Değeri
Q4
Scopus Q Değeri
Q3
Cilt
36
Sayı
6
