作者: Russell C. Van Horn , Becky Zug , Robyn D. Appleton , Ximena Velez-Liendo , Susanna Paisley
DOI: 10.7717/PEERJ.1042
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摘要: Using photos of captive Andean bears known age and pedigree, wild bear cubs <6 months old, we evaluated the degree to which visual information may be used estimate bears’ ages assess their kinship. We demonstrate that ≤6 old estimated from size relative mothers with an average error <0.01 ± 13.2 days (SD; n = 14), adults ≥10 years proportion nose is pink 3.5 (n 41). also show similarity among natural markings, as perceived by humans, not associated pedigree kinship (R2 < 0.001, N 1,043, p 0.499). Thus, researchers use young older adults, but infer Given camera trap are one most readily available sources on large cryptic mammals, suggest similar methods tested for in other poorly understood species.