PERTANIKA JOURNAL OF SCIENCE AND TECHNOLOGY

This study documents a cost-effective strategy for managing Malayan sun bears (Helarctos malayanus) in the captive, focusing on their weight at the National Wildlife Rescue Centre (NWRC), Perak, Malaysia. The weight and development of captive bears’ average aged of two months were assessed using data collected over 18 months. Asymptotic bear weight was estimated using the von Bertalanffy equation. The growth curves significantly differed between male and female bears, with males growing much larger than females from early to later growth stages. This study has determined three types of age classes of bears, where the age of adult Malayan sun bears are fully grown at 11 years and six months for males and eight years and nine months for females. Sub-adult bears ranged between one and six years old for males and one and four years for females, while cubs ranged from zero to one year old. Furthermore, the ideal weight for captive Malayan sun bears by age was also successfully determined. Such information is important for the management of this species in captivity. Ensuring the correct weight and age stage, among other criteria, could be useful for successfully releasing rehabilitated sun bears into their natural habitats.

• Beecham, J. J., Hernando, M. D. G., Karamanlidis, A. A., Beausoleil, R. A., Burguess, K., Jeong, D. H., Binks, M., Bereczky, L., Ashraf, N. V. K., Skripova, K., Rhodin, L., Auger, J., & Lee, B. K. (2015). Management implications for releasing orphaned, captive-reared bears back to the wild. The Journal of Wildlife Management, 79(8), 1327-1336. https://doi.org/10.1002/jwmg.941

• Beecham, J. J., Loeffler, I. K., & Beausoleil, R. A. (2016). Strategies for captive rearing and reintroduction of orphaned bears. Journal of Wildlife Rehabilitation, 36(1), 7-16.

• Begall, S., Burda, H., & Gallardo, M. H. (1999). Reproduction, postnatal development, and growth of social Coruros, Spalacopus cyanus (Rodentia: Octodontidae), from Chile. Journal of Mammalogy, 80(1), 210-217. https://doi.org/10.2307/1383221

• Bousfield, B., & Brown, R. (2010). Animal welfare. Veterinary Bulletin-Agriculture, Fish and Conservation Department Newsletter, 1(4), 1-12.

• Brooks, D., Churchill, J., Fein, K., Linder, D., Michel, K. E., Tudor, K., Ward, E., & Witze, A. (2014). Veterinary practice guidelines: 2014 AAHA weight management guidelines for dogs and cats. Journal of the American Animal Hospital Association, 50(1), 1-11. http://doi.org/10.5326/JAAHA-MS-6331

• de Lima Amancio, A. L., da Silva, J. H. V., Fernandes, J. B. K., Sakomura, N. K., & da Cruz G. R. B. (2014). Use of mathematical models in the study bodily growth in gift strain nile tilapia. Revista Ciencia Agronomica, 45(2), 257-266. https://doi.org/10.1590/S1806-66902014000200005

• Department of Wildlife and National Park. (2014). 2013 Annual report. https://www.wildlife.gov.my/images/stories/penerbitan/laporan_tahunan/LAPORAN%20TAHUNAN%20PERHILITAN%2013.pdf

• Department of Wildlife and National Park. (2017). 2016 Annual report. https://www.wildlife.gov.my/images/document/penerbitan/laporantahunan/LP2016%20-%2020022018.pdf

• Fagen, R., & Fagen, J. (2004). Juvenile survival and benefits of play behaviour in brown bears, Ursus arctos. Evolutionary Ecology Research, 6, 89-102.

• Goodchild, S., & Schwitzer, C. (2008). The problem of obesity in captive lemurs. International Zoo News, 55(6), 353-357.

• Grogan, A., & Kelly, A. (2013). A review of RSPCA research into wildlife rehabilitation. Veterinary Record, 172(8), 211-211. https://doi.org/10.1136/vr.101139

• Hayssen, V., & Orr, T. (2017). Reproduction in Mammals: The Female Perspective. John Hopkins University Press.

• Kingsley, M. C. S. (1979). Fitting the von Bertalanffy growth equation to polar bear age- weight data. Canadian Journal of Zoology, 57, 1020-1025.

• Kingsley, M. C. S., Nagy, J. A., & Reynolds, H. V. (1988). Growth in length and weight of northern brown bears: Differences between sexes and populations. Canadian Journal of Zoology, 66, 981-986.

• Kingsley, M. C. S., Nagy, J. A., & Russell, R. H. (1983). Patterns of weight and loss for grizzly bears in Northern Canada. Ursus, 5, 174-178.

• Lindefors, P., & Tullberg, B. S. (2011). Evolutionary aspects of aggression: The importance of sexual selection. Advances in Genetics, 75, 7-21.

• Lintzenich, B. A., Edwards, M. S., Griffin, M. E., & Robbins, C. T. (2006). Polar Bear Nutrition Guidelines. The Association of American Feed Control Officials.

• McDonough, T. J., & Christ, A. M. (2012). Geographic variation in size, growth, and sexual dimorphism of Alaska brown bears, Ursus arctos. Journal of Mammalogy, 93(3), 686- 697.

• Nabilah, N., Kamarudin, Z. A., Izzat-Husna, M., Mansor, M. S., Rahmat, T., & Shukor, M. N. (2018). Pengurusan beruang matahari di Pusat Menyelamat Hidupan Liar Kebangsaan [Sun Bear Management at the National Wildlife Refuge]. Felda Global Ventures Holdings Berhad (FGV).

• Sethy, J., & Chauhan, N. P. S. (2012). Conservation status of Sun bear (Helarctos malayanus) in Nagaland State, Nort-East India. Asian Journal of Conservation Biology, 1(2), 103-109.

• Shepherd, C. R., & Shepherd, L. A. (2010). The poaching and trade of Malayan sun bears in Peninsular Malaysia. TRAFFIC Bulletin, 23, 49-52.

• Skripova, K. V. (2007). Rearing of orphan Asiatic Black Bear cubs (Ursus thibetanus) for released back to the wild. In J. J. Beecham & A. Ramanathan (Eds.), Proceeding of International Workhops on the Rehabilitation, Release, and Monitoring of Orphan Bear Cubs 2007 (pp. 85-93). International Fund for Animal Welfare.

• Swenson, J. E., Adamiĉ, M., Huber, D., & Stokke, S. (2007). Brown bear body mass and growth in northern and southern Europe. Oecologia, 153, 37-47.