Biological parameters and current status of European eel (Anguilla anguilla Linnaeus, 1758) from Asi River, Northeastern Mediterranean region, Turkey

Demirci S., Akar Ö., Şimşek E., Demirci A., YALÇIN ÖZDİLEK Ş.

Journal of Applied Ichthyology, vol.36, no.6, pp.918-923, 2020 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 36 Issue: 6
  • Publication Date: 2020
  • Doi Number: 10.1111/jai.14145
  • Journal Name: Journal of Applied Ichthyology
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Agricultural & Environmental Science Database, Animal Behavior Abstracts, Aquatic Science & Fisheries Abstracts (ASFA), BIOSIS, CAB Abstracts, Environment Index, Food Science & Technology Abstracts, Veterinary Science Database
  • Page Numbers: pp.918-923
  • Çanakkale Onsekiz Mart University Affiliated: Yes

Abstract

© 2020 Wiley-VCH GmbHThe 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*L3.09 (n = 247), respectively. The age of the sampled fish ranged from year class II to VI. Von Bertalanffy growth parameters were estimated as L∞=69.25 cm, K = 0.43 1/year, t0= −0.41 and phi prime index (ǿ)= 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.