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Deriving observation distances for camera trap distance sampling

Camera trap distance sampling (CTDS)o is a recently developed survey method to estimate animal abundance from camera trap data for unmarked populations. It requires the estimation of camera-animal observation distances, which previously was done by comparing animal positions to reference labels at predefined intervals. Here, we test a photogrammetry approach to derive camera-animal observation distances. We applied both, the reference label and photogrammetry approaches to five ungulate species varying widely in body size (Giraffa camelopardalis, Equus grevyi, Oryx dammah, Kobus

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Diversity and abundance of wild mammals between different accommodation facilities in the Kwakuchinja Wildlife Corridor, Tanzania

Most of the wildlife corridors in Tanzania have been threatened by extensive human activities, including the establishment of tourist’s facilities. However, less attention has been paid to the degree at which tourist accommodation affects the abundance and diversity of wild mammals in wildlife corridors. This study assess the changes in abundance and diversity of wild mammals in relation to proximity to tourist lodges and tented camps in Kwakuchinja Wildlife Corridor. All wild mammals around four randomly selected accommodation facilities that

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Internal parasites of giraffes (Giraffa camelopardalis angolensis) from Etosha National Park, Namibia

During three seasonal periods, parasitological samples were collected from six giraffes (Giraffa camelopardalis angolensis) in the Etosha National Park, Namibia. The helminths recovered included Parabronema skrjabini, Skrjabinema spp., Haemonchus mitchelli and Echinococcus sp. larvae; Cytauxzoon sp. was the only hematozoan found. The low mean abundances of all helminths which ranged from 18 to 531 may be attributed to the low rainfall of this region or because the giraffe is not a preferred host for these species of helminths.

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