rsg_book_2013

BirdsSuccess of projectHighly Successful Successful Partially Successful FailureReasons for success/failure: Recently, almost the released birds tended to settle on Sado Island, aspopulation increased. Adults of crested ibises showed moderate survival rate (61%) for the first year,and showed higher annual survival rate (~80%) after the second year from therelease (Nagata & Yamagishi, 2011). Though eight young of three nests fledged in 2012, the breeding success isconsiderably lower than those of Chinese wild populations (Ding, 2004). Wedo not know whether they are viable offspring or not, as it will take another twoyears for young to reach breeding age. Current breeding performance is not enough to maintain the population withoutthe release of birds. Though captive reared individuals might show lowbreeding success, it will gradually impove as offspring born in the wild willincrease. The effects of low genetic diversity and/or inbreeding depression are stillunknown.ReferencesDing, C. (2004) Research on the Crested Ibis (in Chinese). Shanghai press ofscience and education. Shanhai, China, pp. 388.Endo, C. and Nagata, H. (2012) Seasonal changes of foraging habitats andprey species in the Japanese Crested Ibis Nipponia nippon reintroduced on SadoIsland, Japan. Bird Conservation International. available on CJO doi:10.1017/S0959270912000457Nagata, H. and Yamagishi, S. (2011) Probability of sustaining re-introducedpopulation of Japanese Crested Ibis, Nipponia nippon, for 50 years on SadoIsland, Niigata. Reintroduction 1: 55-61. (in Japanese with English summary)Yamamoto Y (2009) Genetic diversity of Crested ibis in East Asia (in Japanese),In: BirdLife Asia (ed.) Proceedings of Workshop on crested ibis restoration inChina and Japan, BirdLife Asia, Tokyo, Japan, pp. 22-25Yamashina Y, Nakanishi G (1983) Toki (Crested Ibis), Nipponia nippon: lost flightin the dusk (in Japanese). Kyoikusha, Tokyo.62