Diversidad de las comunidades bentónicas en las regiones de reclutamiento de la merluza común Merluccius hubbsi Marini, 1933.
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 (ôPatagonian Shelfö, 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.
| Main Authors: | , , , , |
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| Format: | Journal Contribution biblioteca |
| Language: | Spanish / Castilian |
| Published: |
2015
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| Subjects: | Pesquería de merluza, Captura incidental, Comunidades bentónicas, Diversidad de especies, Juveniles, Merlucciidae, Merluccius hubbsi, Merluza, ASFA_2015::H::Hake fisheries, ASFA_2015::B::By catch, ASFA_2015::B::Benthic communities, ASFA_2015::S::Species diversity, ASFA_2015::J::Juveniles, |
| Online Access: | http://hdl.handle.net/1834/10959 |
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| Summary: | 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 (ôPatagonian Shelfö, 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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