Publication

2010-01

English

http://archimer.ifremer.fr/doc/00000/11134/11532.pdf (Author's final draft, 0.16 Mo)

2009 International Council for the Exploration of the Sea. Published by Oxford Journals.

Mellon-Duval Capucine¹, De Pontual Helene², Metral Luisa¹, Quemener Loic³

1 : IFREMER, Ctr Rech Halieut Mediterraneenne & Trop, Lab Ressources Halieut, F-34203 Sete, France.
2 : IFREMER, Dept Sci & Technol Halieut, F-29280 Plouzane, France.
3 : IFREMER, Lab Technol Syst Instrumentaux, F-29280 Plouzane, France.

Ices Journal Of Marine Science (1054-3139) (Oxford University Press), 2010-01 , Vol. 67 , N. 1 , P. 62-70

7

Ecology, Fishing

age estimation, European hake, growth, Mediterranean, tagging

Growth of European hake was estimated from the results of a conventional tagging study in the Gulf of Lions, the first tagging experiment to have been undertaken on the species in Mediterranean waters. In all, 4277 hake 15–40 cm long were tagged and released on the inshore fishing grounds during spring 2006. The overall recapture rate was 6.5% and times-at-liberty ranged from 1 to 717 d. Growth rate in hake varied with size and sex. The estimated growth parameter (von Bertalanffy k) was estimated as double previously published values based on size frequency distribution in the area. Compared with recent growth parameters derived from the tagging experiments in the Bay of Biscay, k was estimated to be slightly lower in the Gulf of Lions. With this faster growth, hake would mature earlier than previously thought: at age 2 for both sexes, instead of at age 3 or 4 as currently accepted for the Mediterranean. Growth rate by sex decreased to a similar level once fish had attained sexual maturity.