Importancia de sistemas frontales del Mar Argentino sobre la distribución y abundancia de peces de la plataforma continental.
The importance of the Argentine Sea frontal systems on the fish assemblages of the continental shelf (SW Atlantic Ocean) was evaluated. Among the main findings, the results showed increased diversity of demersal fish and higher richness and abundance of pelagic fish at Península Valdés tidal front, and different fish assemblage structures between fronts and adjacent areas (Chapter 1). It was also found that the smaller fish, or juveniles, of three fish species showed an association with frontal systems, not shown in adults (Chapter 2). This association was stronger in fish species of lower trophic level. Then, it was showed that fishing effort had a positive association with fronts suggesting a relationship, albeit indirect, between fish abundance and the frontal systems (Chapter 3). Finally, the analysis of a marine protected area, located where a frontal system occurs, showed that the benefit on the fish assemblage (e.g., higher abundance of fish, larger size and proportion of juvenile hake) was enhanced by locating a management and conservation area near a front (Chapter 4). In conclusion, fronts play an important role in fish distribution, diversity and abundance, and in fishing effort distribution, which highlights the importance of considering them as potential areas of conservation and fishery management. The most important contribution of this thesis is to better understand the relationship between high productivity oceanographic systems, such as fronts, and the fish species inhabiting Argentine continental shelf, which are highly mobile, widely distributed and behaviourally complex.
| Main Author: | |
|---|---|
| Format: | Thesis/Dissertation biblioteca |
| Language: | Spanish / Castilian |
| Published: |
Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales
2013
|
| Subjects: | Frentes oceánicos, Asociación ecológica, Peces demersales, Peces pelágicos, Plataforma continental, Esfuerzo pesquero, ASFA15::O::Oceanic fronts, ASFA15::E::Ecological associations, ASFA15::D::Demersal fish, ASFA15::P::Pelagic fish, ASFA15::C::Continental shelves, ASFA15::F::Fishing effort, |
| Online Access: | http://hdl.handle.net/1834/6829 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | The importance of the Argentine Sea frontal systems on the fish assemblages of the continental shelf (SW Atlantic Ocean) was evaluated. Among the main findings, the results showed increased diversity of demersal fish and higher richness and abundance of pelagic fish at Península Valdés tidal front, and different fish assemblage structures between fronts and adjacent areas (Chapter 1). It was also found that the smaller fish, or juveniles, of three fish species showed an association with frontal systems, not shown in adults (Chapter 2). This association was stronger in fish species of lower trophic level. Then, it was showed that fishing effort had a positive association with fronts suggesting a relationship, albeit indirect, between fish abundance and the frontal systems (Chapter 3). Finally, the analysis of a marine protected area, located where a frontal system occurs, showed that the benefit on the fish assemblage (e.g., higher abundance of fish, larger size and proportion of juvenile hake) was enhanced by locating a management and conservation area near a front (Chapter 4). In conclusion, fronts play an important role in fish distribution, diversity and abundance, and in fishing effort distribution, which highlights the importance of considering them as potential areas of conservation and fishery management. The most important contribution of this thesis is to better understand the relationship between high productivity oceanographic systems, such as fronts, and the fish species inhabiting Argentine continental shelf, which are highly mobile, widely distributed and behaviourally complex. |
|---|