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Survival of reintroduced pygmy slow loris Nycticebus pygmaeus in South Vietnam

2014; Inter-Research; Volume: 25; Issue: 2 Linguagem: Inglês

10.3354/esr00607

1863-5407

Marina Kenyon, Ulrike Streicher, H Loung, Thomas Tran, Maxine Tran, Ba Dinh Vo, A. Cronin,

Animal Vocal Communication and Behavior

ESR Endangered Species Research Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsSpecials ESR 25:185-195 (2014) - DOI: https://doi.org/10.3354/esr00607 Theme Section: Conservation and ecology of slow lorises Survival of reintroduced pygmy slow loris Nycticebus pygmaeus in South Vietnam M. Kenyon1,2,*, U. Streicher2, H. Loung1,3, T. Tran3, M. Tran4, B. Vo1,3, A. Cronin2,5 1Dao Tien Endangered Primate Species Centre, Dong Nai Province, Vietnam 2Endangered Asian Species Trust, Stag Gates House, 63-64 The Avenue, Southampton SO17 1XS, UK 3Cat Tien National Park, Tan Phu, Dong Nai Province, Vietnam 4Dong Nai Biosphere Reserve, Dong Nai Province, Vietnam 5Monkey World-Ape Rescue Centre, Longthorns, Wareham, Dorset BH20 6HH, UK *Corresponding author: marina@monkeyworld.org ABSTRACT: From 2009 to 2012 thirteen wild-born pygmy slow lorises Nycticebus pygmaeus (in this paper referred to as pygmy lorises), confiscated from illegal trade, were radio-collared and released into secondary forest in South Vietnam. Pygmy lorises were monitored until death, recapture, or loss of collar; the longest monitoring period was 73 d. The mean (±SD) distances between consecutive sleeping sites were recorded for 324 consecutive days and averaged 122 ± 108.0 m. Mean distances between sleeping sites for males and females were similar at 110.7 ± 92.6 m for males and 128.8 ± 116.7 m for females, with the greatest distance covered by a female (793 m). Mean height of the sleeping sites was 8.54 ± 4.46 m (n = 60), in trees with a mean diameter at breast height of 75.2 ± 58.4 cm (n = 225). Mean height of the trees where lorises slept was 20.2 ± 9.0 m (n = 230). The pygmy lorises slept mostly in the >8 m band, the area of highest tree connectivity. Of the pygmy lorises studied 38% (5/13) were found dead, 7% (1/13) were returned to captivity due to severe loss of condition and for 23% (3/13) the outcome is unknown due to early collar loss. Causes of death included hyperthermia and natural predation. The remaining 30% (4/13), 2 males and 2 females, were in good condition when last tracked before premature collar drop-off, up to 73 d after release. From this limited data set, a 'soft' release, wet season release and consideration of predator density at the release site are recommendations for increasing chances of survival. KEY WORDS: Pygmy loris · Rehabilitation · Radio-collared release · Vietnam Full text in pdf format PreviousCite this article as: Kenyon M, Streicher U, Loung H, Tran T, Tran M, Vo B, Cronin A (2014) Survival of reintroduced pygmy slow loris Nycticebus pygmaeus in South Vietnam. Endang Species Res 25:185-195. https://doi.org/10.3354/esr00607 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in ESR Vol. 25, No. 2. Online publication date: October 08, 2014 Print ISSN: 1863-5407; Online ISSN: 1613-4796 Copyright © 2014 Inter-Research.