PATTERNS OF PREY BIOMASS CONSUMPTION BY SMALL ODONTOCETES IN THE NORTHEASTERN COAST OF VENEZUELA
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| Natura: | Artículo científico |
| Lingua: | es |
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Universidad Nacional de Costa Rica
2009
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| _version_ | 1876436287405162496 |
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| author | Lenin E. Oviedo Correa |
| author_facet | Lenin E. Oviedo Correa |
| contents | PATTERNS OF PREY BIOMASS CONSUMPTION BY SMALL ODONTOCETES IN THE NORTHEASTERN COAST OF VENEZUELA Lenin E. Oviedo Correa Biología food prey habitat ecosystem distribution Trophic relationships are conditioned by population dynamics of interacting species in the community (species present, food web connections among them, and the strength of interactions), and on the consequences of these species interactions depend various ecosystem processes such as productivity and nutrient Áux. Odontocetes target a wide range of prey items and are adapted to feeding at different depths. The aim of this report is to describe the patterns of prey consumption by small odontocetes, incorporating natural predatory patterns into a potential management scheme of strategic food sources, for both human and marine predators. Using the geo-statistical analysis tool of ArcGIS 9.2, maps illustrating the intensity and location of prey consumption were made for species with a sighting index (SPUE) > 0.15. The biomass consumption emphasized the differences in habitat use by species. The trends in distribution of prey biomass removal by odontocetes particularly suggest a stratiÀcation of prey consumption primarily in shelf waters, with a prey biomass that is comprised basically by demersal Àsh and small pelagics (including Sardinella aurita), and into transition-oceanic depths where most of the predatory pattern would potentially rely on pelagic - mesopelagic squid and myctophids. Overall the spatial tendencies in regionalization presented in this contribution will serve as a base-line to assess ecosystem health and evaluate management scenarios. 2009 artículo científico 1659-455X https://www.redalyc.org/articulo.oa?id=633766716014 es http://www.redalyc.org/revista.oa?id=6337 Revista Ciencias Marinas y Costeras application/pdf Universidad Nacional de Costa Rica Revista Ciencias Marinas y Costeras (Costa Rica) Vol.1 |
| format | Artículo científico |
| id | redalyc_633766716014 |
| institution | Redalyc |
| language | es |
| publishDate | 2009 |
| publisher | Universidad Nacional de Costa Rica |
| spellingShingle | PATTERNS OF PREY BIOMASS CONSUMPTION BY SMALL ODONTOCETES IN THE NORTHEASTERN COAST OF VENEZUELA Lenin E. Oviedo Correa Biología food prey habitat ecosystem distribution PATTERNS OF PREY BIOMASS CONSUMPTION BY SMALL ODONTOCETES IN THE NORTHEASTERN COAST OF VENEZUELA Lenin E. Oviedo Correa Biología food prey habitat ecosystem distribution Trophic relationships are conditioned by population dynamics of interacting species in the community (species present, food web connections among them, and the strength of interactions), and on the consequences of these species interactions depend various ecosystem processes such as productivity and nutrient Áux. Odontocetes target a wide range of prey items and are adapted to feeding at different depths. The aim of this report is to describe the patterns of prey consumption by small odontocetes, incorporating natural predatory patterns into a potential management scheme of strategic food sources, for both human and marine predators. Using the geo-statistical analysis tool of ArcGIS 9.2, maps illustrating the intensity and location of prey consumption were made for species with a sighting index (SPUE) > 0.15. The biomass consumption emphasized the differences in habitat use by species. The trends in distribution of prey biomass removal by odontocetes particularly suggest a stratiÀcation of prey consumption primarily in shelf waters, with a prey biomass that is comprised basically by demersal Àsh and small pelagics (including Sardinella aurita), and into transition-oceanic depths where most of the predatory pattern would potentially rely on pelagic - mesopelagic squid and myctophids. Overall the spatial tendencies in regionalization presented in this contribution will serve as a base-line to assess ecosystem health and evaluate management scenarios. 2009 artículo científico 1659-455X https://www.redalyc.org/articulo.oa?id=633766716014 es http://www.redalyc.org/revista.oa?id=6337 Revista Ciencias Marinas y Costeras application/pdf Universidad Nacional de Costa Rica Revista Ciencias Marinas y Costeras (Costa Rica) Vol.1 |
| title | PATTERNS OF PREY BIOMASS CONSUMPTION BY SMALL ODONTOCETES IN THE NORTHEASTERN COAST OF VENEZUELA |
| topic | Biología food prey habitat ecosystem distribution |
| url | https://www.redalyc.org/articulo.oa?id=633766716014 |