Resultados del análisis de una campaña de investigación pesquera, sobre comunidades bentónicas asociadas a bancos de mejillón (Mytilus edulis platensis D'Orb.)en costas de Buenos Aires, Argentina.

Abstract

Macrobenthic sampling was carried out during the survey of mussel beds (Mytilus edulis platensis, D'Orb)at the continental shelf of Buenos Aires province (Argentina)(EH-06/93, INIDEP). 47 samples were obtained with a hard bottom dredge between 18 m and 64 m depth;sedimentological samples were also collected in every station. The following descriptors were used: Maxime Dominance, Relative Dominance, Relative Presence (Bouderesque, 1971), Specific Diversity(H')(Shannon Weaver, 1963)and Evenness (J')(Pielou, 1966)Faunistic associations and areas of distribution were defined usingcluster analysis (UPGMA, Q and R modes)(Legendre Legendre, 1979).The community structure of the benthic macrofauna associated to mussel beds was defined for a coastal area between 37°S and 39°.These areas are characterized by a high heterogeneity in granulometric composition and patchy distribution of faunistics associations.