Data/hora: 16/06/2024 06:35:33

Provedor de dados: | 20
País: | Belgium

Título:

Asociación bentónicas en bancos de vieira patagónica (Zygochlamys patagonica) en el Mar Argentino

Benthic assemblages at the Patagonian scallop (Zygochlamys patagonica) beds, Argentine Sea

Autores: | Schejter, L.
Data: | 2011-04-29
Ano: | 2005
Palavras-chave: | Zoobenthos; Community composition; Long-term changes; Short-term changes; Species diversity; Fishing grounds; Epibionts; Scallop fisheries; Multivariate analysis; Multivariate analysis; Zoobenthos; Species diversity; Fishing grounds.
Resumo: | 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.
Tipo: | Theses and Dissertations
Idioma: | Espanhol
Identificador: | http://hdl.handle.net/1834/3917
Editor: | Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales
Formato: | 219