Dieta de la merluza Merluccius gayi (Guichenot, 1848) del norte de Chile
The diet composition of Merluccius gayi (Guichenot, 1848) off northern Chile was studied between April 1993 and March 1994 with monthly sampling. Twenty-two prey taxa, comprising three trophic groups, were identified in the stomach contents of 1576 fishes. The highest contribution to the diet was co...
| Authors: | , , |
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| Format: | article |
| Publication Date: | 2001 |
| Country: | España |
| Institution: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repository: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/325888 |
| Online Access: | http://hdl.handle.net/10261/325888 |
| Access Level: | Open access |
| Keyword: | Pesquerías Dieta Merluccius gayi Pacífico suroriental Chile |
| Summary: | The diet composition of Merluccius gayi (Guichenot, 1848) off northern Chile was studied between April 1993 and March 1994 with monthly sampling. Twenty-two prey taxa, comprising three trophic groups, were identified in the stomach contents of 1576 fishes. The highest contribution to the diet was constituted by benthic crustaceans, such as the deep-sea shrimp Heterocarpus reedi (Bahamonde, 1955) and the pelagic prey Euphausia mucronata (Sars, 1883). Although the ocurrence of H. reedi was significant in all size ranges analyzed, the mean size of these macrocrustaceans did not increase with predator size. The opportunistic characteristic of this species, and its selective predation on H. reedi individuals that concentrated in the fishing area, is highlighted, comparing the present results with those obtained in previous studies on the trophic behaviour of hake. |
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