Food habits of the broad nose skate, Bathyraja brachyurops (Chondrichthyes, Rajidae), in the south-west Atlantic
Food habits of Bathyraja brachyurops were studied based on stomach content analyses of 346 specimens collected from research cruises carried out from 2003 to 2005 on the Argentinean continental shelf (36ºS-55ºS). A total of 265 stomachs (76.6%) contained food, and thirty-five taxonomic levels of pre...
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| Format: | Article |
| Language: | English |
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Consejo Superior de Investigaciones Científicas
2008-12-01
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| Series: | Scientia Marina |
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| Online Access: | http://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/1028 |
| _version_ | 1818673163914969088 |
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| author | Mauro Belleggia Ezequiel Mabragaña Daniel E. Figueroa Lorena B. Scenna Santiago A. Barbini Juan M. Díaz de Astarloa |
| author_facet | Mauro Belleggia Ezequiel Mabragaña Daniel E. Figueroa Lorena B. Scenna Santiago A. Barbini Juan M. Díaz de Astarloa |
| author_sort | Mauro Belleggia |
| collection | DOAJ |
| description | Food habits of Bathyraja brachyurops were studied based on stomach content analyses of 346 specimens collected from research cruises carried out from 2003 to 2005 on the Argentinean continental shelf (36ºS-55ºS). A total of 265 stomachs (76.6%) contained food, and thirty-five taxonomic levels of prey were identified. The most important prey were fishes followed by isopods. Trophic level analysis revealed that B. brachyurops is a tertiary consumer throughout its life history. There were no differences between sexes and regions in the diet composition, but dietary shifts with ontogeny were found. The Levins’ standardized index indicated wider niche breadth for small skates, whereas larger skate specimens showed a narrow niche breadth with a specialization in fishes. |
| first_indexed | 2024-12-17T07:51:26Z |
| format | Article |
| id | doaj.art-38564da4d8414cc1a36ea20bd321f3b5 |
| institution | Directory Open Access Journal |
| issn | 0214-8358 1886-8134 |
| language | English |
| last_indexed | 2024-12-17T07:51:26Z |
| publishDate | 2008-12-01 |
| publisher | Consejo Superior de Investigaciones Científicas |
| record_format | Article |
| series | Scientia Marina |
| spelling | doaj.art-38564da4d8414cc1a36ea20bd321f3b52022-12-21T21:57:50ZengConsejo Superior de Investigaciones CientíficasScientia Marina0214-83581886-81342008-12-0172470171010.3989/scimar.2008.72n47011018Food habits of the broad nose skate, Bathyraja brachyurops (Chondrichthyes, Rajidae), in the south-west AtlanticMauro Belleggia0Ezequiel Mabragaña1Daniel E. Figueroa2Lorena B. Scenna3Santiago A. Barbini4Juan M. Díaz de Astarloa5Laboratorio de Ictiología, FCEyN, Universidad Nacional de Mar del Plata (UNMdP) - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) - Instituto Nacional de Investigación y Desarrollo PesqueroLaboratorio de Ictiología, FCEyN, Universidad Nacional de Mar del Plata (UNMdP) - Museo del MarLaboratorio de Ictiología, FCEyN, Universidad Nacional de Mar del Plata (UNMdP)Laboratorio de Ictiología, FCEyN, Universidad Nacional de Mar del Plata (UNMdP) - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)Laboratorio de Ictiología, FCEyN, Universidad Nacional de Mar del Plata (UNMdP) - Comisión de Investigaciones Científicas del Gobierno de la Provincia de Buenos Aires (CIC)Laboratorio de Ictiología, FCEyN, Universidad Nacional de Mar del Plata (UNMdP) - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) - Instituto Nacional de Investigación y Desarrollo PesqueroFood habits of Bathyraja brachyurops were studied based on stomach content analyses of 346 specimens collected from research cruises carried out from 2003 to 2005 on the Argentinean continental shelf (36ºS-55ºS). A total of 265 stomachs (76.6%) contained food, and thirty-five taxonomic levels of prey were identified. The most important prey were fishes followed by isopods. Trophic level analysis revealed that B. brachyurops is a tertiary consumer throughout its life history. There were no differences between sexes and regions in the diet composition, but dietary shifts with ontogeny were found. The Levins’ standardized index indicated wider niche breadth for small skates, whereas larger skate specimens showed a narrow niche breadth with a specialization in fishes.http://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/1028bathyrajaargentinabroad nose skateelasmobranchstrophic ecology |
| spellingShingle | Mauro Belleggia Ezequiel Mabragaña Daniel E. Figueroa Lorena B. Scenna Santiago A. Barbini Juan M. Díaz de Astarloa Food habits of the broad nose skate, Bathyraja brachyurops (Chondrichthyes, Rajidae), in the south-west Atlantic Scientia Marina bathyraja argentina broad nose skate elasmobranchs trophic ecology |
| title | Food habits of the broad nose skate, Bathyraja brachyurops (Chondrichthyes, Rajidae), in the south-west Atlantic |
| title_full | Food habits of the broad nose skate, Bathyraja brachyurops (Chondrichthyes, Rajidae), in the south-west Atlantic |
| title_fullStr | Food habits of the broad nose skate, Bathyraja brachyurops (Chondrichthyes, Rajidae), in the south-west Atlantic |
| title_full_unstemmed | Food habits of the broad nose skate, Bathyraja brachyurops (Chondrichthyes, Rajidae), in the south-west Atlantic |
| title_short | Food habits of the broad nose skate, Bathyraja brachyurops (Chondrichthyes, Rajidae), in the south-west Atlantic |
| title_sort | food habits of the broad nose skate bathyraja brachyurops chondrichthyes rajidae in the south west atlantic |
| topic | bathyraja argentina broad nose skate elasmobranchs trophic ecology |
| url | http://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/1028 |
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