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| Montaña,Carmen G.; Layman,Craig A.; Winemiller,Kirk O.. |
| We examined diets of four piscivores, two in the order Perciformes (Cichla temensis and C. orinocensis) and two in the order Characiformes (Boulengerella cuvieri and B. lucius), from the Cinaruco, La Guardia, and Ventuari rivers in Venezuela throughout the wet-dry seasonal cycle. The four piscivores consumed a phylogenetically and morphologically diverse group of fishes, reflecting the overall diversity of fish species in these rivers. At the start of the falling-water period, Cichla consumed large prey, especially the abundant, migratory, fish of the genus Semaprochilodus. As these relatively large prey became depleted during the dry season, Cichla tended to consume smaller prey. For Boulengerella, gape limitation precluded consumption of larger,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Floodplain river; Food web; Optimal foraging theory; Predator-prey interaction; Venezuela. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252011000300018 |
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| CAVALCANTE,Thiago; TUYAMA,Carlos Augusto; MOURTHE,Italo. |
| ABSTRACT The post-fledging period is of paramount importance for raptors, since this is when a juvenile develops its hunting skills and gains the abilities required in adulthood and independence through dispersal. Little is known however, about this stage in the lives of raptors such as harpy eagles, Harpia harpyja. Between March 2016 and July 2017, we recorded three predation attempts on groups of primates by a wild juvenile harpy eagle in southwestern Brazilian Amazonia, including the first predation of an adult squirrel monkey, Saimiri ustus. These sequential records give insights into the gradual development of hunting skills during the post-fledging period, similar to what has been reported for other birds of prey. We hypothesize that a link between... |
| Tipo: Info:eu-repo/semantics/report |
Palavras-chave: Hunting behavior; Juvenile raptor; Predator-prey interaction; Foraging; Harpia harpyja. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672019000200114 |
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| Mariani,Daniela Bueno; Guimarães,Juliana Plácido; Batista,Renata Guedes; Brum,Andrei; Groch,Kátia Regina; Díaz-Delgado,Josué; Parente,Jociery Einhardt Vergara. |
| ABSTRACT: The Guiana dolphin (Sotalia guianensis) is a small odontocete distributed from Santa Catarina state, Brazil, to Honduras. Although it is currently considered “near threatened” by the International Union for Conservation of Nature, considerable knowledge on health and disease aspects of this species has been gained over the last decade. The main threats for the species are represented by multiple anthropic factors. Guiana dolphins feed on a variety of taxa, primarily teleosts, crustaceans, and cephalopods. Herein, we reported a case of severe laryngeal displacement and esophageal impaction with ulceration associated with a deglutted adult leatherjacket (Oligoplites sp.). This fish species is not a common prey item of Guiana dolphins’ diet. Severe... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Deglutition; Larynx; Cetacean; Pathology; Predator-prey interaction; Impaction; Esophageal ulcer. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020000200550 |
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