An evaluation of field techniques for monitoring terrestrial mammal populations in Amazonia

摘要: In the Amazon region diurnal line-transect census is technique used by most monitoring programs to collect data on medium and large terrestrial mammals. However, this method usually fails provide high quality information (e.g. abundance, occurrence) for some species, especially larger bodied less abundant ones, which are mostly threatened human disturbances. Aiming guidelines in we compared efficiency of three field techniques: (1) surveys (i.e. with sign surveys), (2) nocturnal (3) camera trapping non-flooded seasonally flooded forest sites at Uacari Sustainable Development Reserve, western Brazilian Amazonia. Nocturnal provided poor all except pacas. Tracks accounted 50% observations recorded during surveys, effective smaller species ungulates. For armadillos rare was technique. Moreover, techniques failed detect common agouti, least two sites. High sampling effort using a combination methods statistical analyses that enable integration different source data, such as photos, tracks visual sightings, necessary steps maximize mammals Amazonian forests.