JAGUAR BIBLIOGRAPHY
Compiled by C. Inskip & A. Zimmermann, Chester Zoo (UK) |
- Title:
- Comparative feeding ecology of jaguar and puma in the neotropics.
- Year Published:
- 2002
- Authors:
- Oliveira, T.G. de.
- Abstract:
- Jaguar (Panthera onca) and puma (Puma concolor) have similar body sizes and share many of the same range and habitats. In order to better understand their ecological differentiation, their macroecological patterns of trophic utilization and dietary segregation were assessed. Dietary breadth of both species were very similar. Prey utilization was extremely variable, but consisted predominantly of peccaries, deer, large caviomorph rodents, and armadillos. Differences in their consumed biomass in sympatry were found only for peccaries and chelonians. Jaguars consumed more medium and larger sized mammals (> 1 kg), whereas puma ate more medium sized mammals (1−15 kg). Nevertheless, no differences were found between these predators for any of the prey weigh-class sizes. Their patterns of prey selection were probably influenced by prey availability and vulnerability. Food overlap ranged from 17% to 82%, but even in areas of high overlap
there were differences in the proportions of some prey taken. Jaguar and puma mean prey weight (MPW) varied considerably but, on average, that of jaguar was twice as much as the puma‚Äö?Ñ?¥s. A similar trend was noted for the mean mass of main prey. However, if only MPW of wildlife were considered, no differences were found. MPW differed by habitat type for both cats. For both predator species, larger prey were taken in the floodplains (puma also on xeric areas of the USA/Mexican border) and the smallest in drier South American habitats. MPW was positively correlated with jaguar (r = 0.660) and puma (r = 0.833) body size. The mean prey-predator ratio (MPPR) was similar for both felids, whereas jaguar:puma body and MPW ratios showed the same patterns in Central (1:0.9) and South America (1:0.6). Trends found were indicative of dietary segregation, possibly to minimize competition.
- Journal:
- In R.A. Medellin, C. Equihua, C.L.B. Chetkiewicz, P.G. Crawshaw, A. Rabinowitz, K.H. Redford, J.G. Robinson, E.W. Sanderson e A. Taber (Editores). El Jaguar en el Nuevo Milenio. Ediciones Cientificas Universitarias. Mexico.
- Web Link:
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