Age and growth of Conger conger (Congridae) from the north coast of Tunisia

Sallami B., Ben Salem M.

Date de parution: juillet 2017
Volume: 41
Number: 3
Pagination: 237-243
Editeur: Société Française d'Ichtyologie
doi: https://doi.org/10.26028/cybium/2017-413-002
Résumé

A total of 239 European conger eels, Conger conger (Linnaeus, 1758), were collected from the north coast of Tunisia between January 2011 and December 2012. Their lengths ranged between 23.8 and 136.0 cm and their weight between 17.26 and 5000.00 g. Their individual age, determined from vertebrae and sagittal otoliths, ranged from one to seven years; most of the sampled fish were between three and four years old. The length-weight relationship was determined as follows: Wt = 0.0003TL3.37 (R = 0.987). The conger eel of the Tunisian north coast showed positive allometric growth (b = 3.37) and b values, which were significantly different from 3. The von Bertalanffy growth function for the sample population had the following parameters: L∞ = 249.032 cm, K = 0.118 year–1 and t0 = 0.97 year.
 

Mots-clés: Age - Conger conger - Congridae - Growth - North Coast of Tunisia
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