Diversity of benthic communities in the recruitment areas of Common Hake Merluccius hubbsi (Marini, 1933)

Authors

  • Diego Giberto Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP) - Instituto de Investigaciones Marinas y Costeras (IIMyC) - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
  • María Romero Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
  • Mariana Escolar Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP)
  • Laura Machinandiarena Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP) - Departamento de Ecología, Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires (UBA)
  • Claudia Bremec Instituto de Investigaciones Marinas y Costeras (IIMyC) - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)

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 (“Patagonian Shelf”, 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.

 

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Published

2015-12-28

How to Cite

1.
Giberto D, Romero M, Escolar M, Machinandiarena L, Bremec C. Diversity of benthic communities in the recruitment areas of Common Hake Merluccius hubbsi (Marini, 1933). Mar Fish Sci [Internet]. 2015Dec.28 [cited 2021Jul.29];27:5-25. Available from: https://ojs.inidep.edu.ar/index.php/mafis/article/view/54

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