Diversidad de las comunidades bentónicas en las regiones de reclutamiento de la merluza común Merluccius hubbsi Marini, 1933.

Published in Revista de Investigación y Desarrollo Pesquero
Authors

Giberto, D.A., Romero, R.V., Escolar, M., Machinandiarena, L. and Bremec, C.S.
Publication year 2015
DOI n/a
Affiliations
  • Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP), Paseo Victoria Ocampo Nº1, Escollera Norte, B7602HSA - Mar del Plata, Argentina
  • Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
  • Instituto de Investigaciones Marinas y Costeras (IIMyC), Universidad Nacional de Mar del Plata (UNMdP), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentia
  • Departamento de Ecología, Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires (UBA), Pabellón 2, Ciudad Universitaria, C1428EHA - Ciudad Autónoma de Buenos Aires, Argentina

 
IAI Program

CRN3
IAI Project CRN3094
Keywords
Common hake
fisheries
bycatch
diversity
benthic macrofauna
Southwest Atlantic

Abstract

The environmental and biological traits of fishes recruitment and nursery areas play a key role in their survival. In that context, the aim of this work was to characterize the diversity of macrobenthic communities linked to young-of-the-year common hake in the San Jorge Gulf region (&ldquoPatagonian Shelf&rdquo, PS) and the Argentine-Uruguayan Common Fishing Zone (AUCFZ). Bycatch data gathered in research cruises performed by the Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP) (2005-2011) were used. 147 taxa in the PS and 165 in the AUCFZ were found, with predominance of crustaceans, mollusks and echinoderms. The total asymptotic richness estimates varied between 154-184 (PS) and 182-214 (AUCFZ). The PS displayed a lower species density than the AUCFZ and lesser richness of all values in the individuals considered. However, several of its benthic assemblages showed a larger presence of species, which results in an increase of the bottom complexity and the strengthening of shelter conditions for young-of-the-year specimens to face predation and, thus, in a higher survival level. Said hypothesis should be evaluated in the long term with studies aimed, specifically, at the benthic communities using the baseline generated by bycatch samplings.