Barria C., Navarro J., Coll Marta, Fernandez-Arcaya U., Saez-Liante R. (2015). Morphological parameters of abundant and threatened chondrichthyans of the northwestern Mediterranean Sea. Journal of Applied Ichthyology, 31 (1), p. 114-119. ISSN 0175-8659.
Titre du document
Morphological parameters of abundant and threatened chondrichthyans of the northwestern Mediterranean Sea
Barria C., Navarro J., Coll Marta, Fernandez-Arcaya U., Saez-Liante R.
Source
Journal of Applied Ichthyology, 2015,
31 (1), p. 114-119 ISSN 0175-8659
The diversity of chondrichthyans in the Mediterranean Sea is relatively high; however, available data indicate that this group is declining in abundance and several species are becoming rare. As a result, the collection of biological data is a priority for demographic models, stock assessments, and food web analysis. In the present study, we report morphological parameters and length-weight relationships of several chondrichthyan species, both abundant and threatened, from the western Mediterranean Sea. Samples were obtained with commercial and scientific bottom trawl vessels between 2001 and 2013. A total of 893 individuals belonging to 11 families and 20 species were weighed and total lengths measured. In addition, seven species of large demersal sharks were measured and length-length relationships obtained to study the relationships between different body length measurements. All species showed positive allometric or isometric growth, except for Centroscymnus coelolepis. The results of the length-weight relationships reveal differences between the western Mediterranean and nearby areas, depending on the species studied.
