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Biogeography of continental shelf and upper slope fishes off El Salvador, Central America

Published online by Cambridge University Press:  10 October 2014

Claudia I. Fuentes ,
Enzo Acuña  and
Numa R. Hernández
Claudia I. Fuentes
Affiliation:
Departamento de Biología Marina, Facultad de Ciencias del Mar, Universidad Católica del Norte, Casilla 117, Coquimbo, Chile Magister en Ciencias del Mar. Facultad de Ciencias del Mar, Universidad Católica del Norte, Casilla 117, Coquimbo, Chile
Enzo Acuña*
Affiliation:
Departamento de Biología Marina, Facultad de Ciencias del Mar, Universidad Católica del Norte, Casilla 117, Coquimbo, Chile
Numa R. Hernández
Affiliation:
Centro de Desarrollo de la Pesca y la Acuicultura (CENDEPESCA), Final 1ra. Av. Norte, 13 Calle Poniente y Av. Manuel Gallardo, Santa Tecla, La Libertad, El Salvador
*
Correspondence should be addressed to:E. Acuña, Departamento de Biología Marina, Facultad de Ciencias del Mar, Universidad Católica del Norte, Casilla 117, Coquimbo email: [email protected]
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Abstract

The present research provides detailed information on the geographic and bathymetric distributional patterns of fishes and describes the main species assemblages of the continental shelf and upper slope off El Salvador. The sampling was based on 673 bottom-trawl tows taken during research surveys from April to November 2003. The data analysis was based on presence-absence matrixes and was conducted with PRIMER 6 software. A total of 148 fish species were recorded during the study period: the families with the highest number of species were Sciaenidae (13) and Carangidae (10), and the highest percentages of occurrence were registered for Porichthys margaritatus (40.6%), Pontinus sp. (34.8%) and Monolene dubiosa (33.1%). The cluster analysis by depth showed three faunistic associations: (1) on the inner and part of the mid continental shelf (20–60 m), (2) one bathymetric stratum on the mid continental shelf (80–100 m), and (3) on the outer continental shelf and upper slope (120–240 m). The cluster analysis by geographic zones showed separation between three zones: Western, Central and Eastern Zones off El Salvador. The Central zone is characterized by a different fish community of mixed habitat, while the main factor that determined the fish assemblages on the continental shelf and upper slope was depth.

Keywords

Ichthyofaunabathymetric distributionspatial distributionTropical Eastern Pacific
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 95 , Issue 3 , May 2015 , pp. 611 - 622
Copyright
Copyright © Marine Biological Association of the United Kingdom 2014 

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