Morphometric Variation of Fishery-Exploited Muricidae (Hexaplex trunculus) in the Mediterranean Sea and the Northeastern Atlantic Ocean: Implications for Stock Identification - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Turkish Journal of Fisheries and Aquatic Sciences Année : 2016

Morphometric Variation of Fishery-Exploited Muricidae (Hexaplex trunculus) in the Mediterranean Sea and the Northeastern Atlantic Ocean: Implications for Stock Identification

Résumé

Morphological studies of species with wide distribution range and high commercial value, such as the banded murex Hexaplex trunculus (Linnaeus, 1758), provide information on stock structure, which is the basis for understanding fish population dynamics and enable resource assessment for fisheries management. In the present study, we examined morphological variation among Atlantic and Mediterranean populations of H. trunculus using multivariate analysis. Our results supported the existence of four distinguishable stocks (Atlantic, Alboran, Western Mediterranean and Eastern Mediterranean), correctly classified 71.7% of specimens, and indicated significant degrees of variation in morphometric characteristics between regions. Examination of the contribution of each morphometric variable to the principal components and canonical functions indicated that differences among samples seemed to be associated with the shell and aperture length and width. Samples from the Atlantic Ocean and the Alboran Sea had the largest shell size and the greatest morphometric divergence. This strong morphometric differentiation appears to be associated with local environmental factors (exposure on the rocky shores, food availability and predation) and oceanographic current barriers.

Dates et versions

Identifiants

Citer

Zined Marzouk, Anne Chenuil, Hager Blel, Khaled Saïd. Morphometric Variation of Fishery-Exploited Muricidae (Hexaplex trunculus) in the Mediterranean Sea and the Northeastern Atlantic Ocean: Implications for Stock Identification. Turkish Journal of Fisheries and Aquatic Sciences, 2016, 16 (2), pp.327--338. ⟨10.4194/1303-2712-v16_2_13⟩. ⟨hal-01444628⟩
91 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More