IUCN / SSC Cat Specialist Group - Digital Cat Library |
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| McConkey, K.R.; Chivers, D.J. | |
| Low mammal and hornbill abundance in the forests of Barito Ulu, Central Kalimantan, Indonesia | |
| 2004 Oryx (38): 439-447 | |
Faunal surveys in Kalimantan have been biased towards primates in protected forests close to the coast. Relatively little has been documented on other animal species, particularly in the vast interior forests. The results of a 1996-97 census of nine large mammal and eight hornbill species in tropical lowland forest in Barito Ulu, Central Kalimantan are reported here. Pigs _Sus barbatus_ had the highest biomass, but this was due to large numbers migrating through the study area over 4 months and the resident population is probably low. Langurs _Presbytis rubicunda_ and hybrid gibbons _Hylobates mulleri_ ž _agilis_ had the highest biomass of all resident species. Orang-utans _Pongo pygmaeus_ were absent from the area during the study period and pig-tailed macaques _Macaca nemestrina_ were rarely seen. The resident hornbill species (_Anthracoceros malayanus, Anorrhinus galeritus, Buceros vigil_ and _B. rhinoceros_) had high densities compared to that reported from lowland areas, but overall hornbill density was low due to the absence of the nomadic _Aceros corrugatus_ and _A. undulatus_, except during peak fruit abundance. Sun bears _Helarctos malayanus_, long-tailed macaques _M. fascicularis_, muntjacs _Muntiacus_ spp. and mouse deer _Tragulus_ spp. were at low densities. Density of two large squirrel species, _Ratufa affinis_ and _Sundasciurus hippiurus_, was lower than has been reported in Sarawak, but the density of Prevost's squirrel _Callosciurus prevostii_ was higher. We discuss hunting pressure, isolation, low abundance of large fruit trees, poor soils, and specific habitat preferences as possible explanations for the low mammal and hornbill density at Barito Ulu. |
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