SHORT COMMUNICATION Giant otters feeding on caiman: evidence for an expanded trophic niche of recovering populations

作者: Carolina Ribas , Guilherme Mourão , Gabriel Damasceno , William Magnusson , Caroline Leuchtenberger

DOI:

关键词:

摘要: As water along dirt roads in the Pantanal floodplains diminishes, aquatic fauna becomes restricted to shallow pools. At end of 2009 dry season, we filmed giant otters living pools predating on yacare caimans. Such predation has not been recorded inhabiting Pantanal. Individual captured sub-adult The did share prey, but conspecifics stole it after conflicts. Caiman could be related resource scarcity these marginal environments. Information diet and interactions endangered populations may underestimate their trophic niche when they recover from over-hunting expand into suboptimal habitat. A medida que as aguas ao longo das estradas de terra na planicie pantaneira diminuem, a aquatica se torna restrita pocas rasas do entorno. No final da estacao seca 2009, nos filmamos ariranhas predando jacares em baias temporarias. Este tipo predacao nao foi descrito antes para capturaram sub-adultos, individualmente. presa dividida voluntariamente, mas roubada por outros individuos grupo, apos conflitos. Esta pode estar relacionada com escassez alimento nestes ambientes marginais. Informacoes dieta e interacoes populacoes ameacadas talvez subestimem seu nicho trofico quando estas recuperam, periodo sem caca, expandem sub-otimos.

参考文章(12)
P.E. Stander, Cooperative hunting in lions : the role of the individual Behavioral Ecology and Sociobiology. ,vol. 29, pp. 445- 454 ,(1992) , 10.1007/BF00170175
Jacinto Román, What do otters eat where there is no fish Mammalian Biology. ,vol. 76, pp. 237- 239 ,(2011) , 10.1016/J.MAMBIO.2010.08.005
Scott Creel, Nancy Marusha Creel, Communal hunting and pack size in African wild dogs, Lycaon pictus Animal Behaviour. ,vol. 50, pp. 1325- 1339 ,(1995) , 10.1016/0003-3472(95)80048-4
S. K. CARTER, F. C. W. ROSAS, Biology and conservation of the Giant Otter Pteronura brasiliensis Mammal Review. ,vol. 27, pp. 1- 26 ,(1997) , 10.1111/J.1365-2907.1997.TB00370.X
Márcia M. M. Cabral, Jansen Zuanon, Gália E. de Mattos, Fernando C. W. Rosas, Feeding habits of giant otters Pteronura brasiliensis (Carnivora: Mustelidae) in the Balbina hydroelectric reservoir, Central Brazilian Amazon Zoologia. ,vol. 27, pp. 47- 53 ,(2010) , 10.1590/S1984-46702010000100008
Fernando C. W. Rosas, Jansen A. S. Zuanon, Sarah K. Carter, Feeding Ecology of the Giant Otter, Pteronura brasiliensis1 Biotropica. ,vol. 31, pp. 502- 506 ,(1999) , 10.1111/J.1744-7429.1999.TB00393.X
Angelo Barbosa Monteiro Machado, Gláucia Moreira Drummond, Adriano Pereira Paglia, None, Livro vermelho da fauna brasileira ameaçada de extinção Ministério do Meio Ambiente - MMA. ,(2008)