Population analysis of Bali Mynah (Leucopsar rothschildi Stresemann 1912) released in 2007 in Bali Barat National Park, Indonesia

Abstract

Abstract. Hernowo JB. 2017. Population analysis of Bali mynah (Leucopsar rothschildi Stresemann 1912) released in 2007 in Bali Barat National Park, Indonesia. Trop Drylands 1: 83-89. Bali mynah (Leucopsar rothschildi) is threatened bird species pressured by wild hunting and habitat loss. Efforts to restore the population of Bali mynah include releasing some numbers of captive breeding individuals into their natural habitat, for example, the release in the year 2007 in Bali Barat National Park. Yet, monitoring activities are important to evaluate the effectiveness of the release program. This paper aimed to study the dynamics of Bali mynah population after its release in 2007, the habitat conditions that support Bali mynah population, and effectiveness of management effort that has been done for Bali Mynah. Monitoring surveys of the Bali mynah population were done in June 2008, June 2009 and October 2009 using direct observation focused on rations feeding site and surrounding areas at Tanjung Gelap (Menjangan Resort). The number of individuals in June 2008 was 20 individuals, and that in June 2009 and October 2010 were 20 individuals and 22 individuals respectively. The Bali mynah survival is approximately 77.27-110.53% in two respective years with the bird natality rate is 10.53%. The sex ratio is about 1:1 and birds' age structure is 95.24% adult and 4.76% sub-adult. In general, the population of Bali mynah at Tanjung Gelap is in good condition. The important factors that support Bali mynah survival in the wild habitat are managed nest boxes, food rations and the protection Bali mynah from illegal poaching.