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http://hdl.handle.net/1834/3917
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| Title: | Asociación bentónicas en bancos de vieira patagónica (Zygochlamys patagonica) en el Mar Argentino |
| Other Titles: | Benthic assemblages at the Patagonian scallop (Zygochlamys patagonica) beds, Argentine Sea |
| Authors: | Schejter, L. |
| Theses advisor: | Bremec, C. |
| ASFA Terms: | Zoobenthos
Community composition
Long-term changes
Short-term changes
Species diversity
Fishing grounds
Epibionts
Scallop fisheries
Multivariate analysis |
| Issue Date: | 2005 |
| Abstract: | The different aspects of the benthic assemblages at the Patagonian scallop beds in the Argentine Sea (SW Atlantic) were studied. The Patagonian scallop (Zygochlamys patagonica) is a commercial species distributed in the Magellanic Biogeographic Province, and has been commercially exploited since 1996. Temporal and spatial studies were performed in the community composition between 39°50'S and 36°15'S, and between 1998 and 2003, concluding that the species association was persistent after more than 7 years of trawling activities. Species composition in an exclusion area (closed to scallop fishing) did not differ from surrounding fished areas during the studied period, showing only a higher scallop biomass. ABC curves showed a pattern coincident with a non disturbed area in the exclusion area, while the fishing ground coincided with a moderately disturbed area. Epibiont taxa on Zygochlamys patagonica were also studied in the whole area. Thirty nine species were recorded, showing the importance of the scallop as a settlement substrate in the area. Shell repaired damage was registered in many scallops from all the areas and studied years. Potential causes of this sub-lethal damage (mainly predation and fishing effects) are discussed. |
| URI: | http://hdl.handle.net/1834/3917 |
| Appears in Collections: | Tesis En Ciencias Marinas
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