Diet of the oilfish Ruvettus pretiosus (Perciformes: Gempylidae) in the Saint Peter and Saint Paul archipelago, Brazil

• Autor(a) principal: Viana, Danielle de Lima
• Data de Publicação: 2012
• Outros Autores: Tolotti, Mariana Travassos, Porto, Mariana, Araújo, Rodolfo Jorge Vale de, Vaske Júnior, Teodoro, Hazin, Fabio Hissa Vieira
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Brazilian Journal of Oceanography
• Texto Completo: https://www.revistas.usp.br/bjoce/article/view/39752
• topic: Perciformes; Benthopelagic species; Stomach content; hand line; Island; Perciformes; Espécie bentopelagica; Conteúdo estomacal; linha de mão; Ilha

Feeding aspects of the oilfish, Ruvettus pretiosus, were studied based on 360 stomachs of both male and female specimens caught off the Saint Peter and Saint Paul Archipelago. The total length of the specimens ranged from 52.4 cm to 189.0 cm. Of the 360 stomachs examined, 135 presented some food and 225 were empty. Thirty-four taxa were identified, represented by 16 fish, 17 cephalopods and 1 crustacean. The stabilization of the food items richness was attained at 35 food items and 104 stomachs, approximately. A remarkable predation upon the flying fish Cheilopogon cyanopterus was observed around SPSPA, directly related to the main reproductive period of this species in the area. The oilfish's food spectrum shows that the species feeds on a wide vertical range in the water column, catching prey items at the surface or in shallow waters, as well as epi-mesopelagic fish, in addition to mesopelagic cephalopods.