Sika deer and established woodlands, and public and private forestry bodies adopt policies of rigorous year-round culling. The main predators of sika deer include tigers, wolves, leopards, and brown bears. Lynx and golden eagles target fawns. Velvet antler (dried immature antlers) is a popular ingredient in traditional Chinese medicine, and sika in China were domesticated long ago for the antler trade, along with several other species. In Taiwan, both Formosan sika deer and Formosan sambar deer ("Cervus unicolor swinhoei") have been farmed for velvet antlers. Japan is the only country in eastern Asia where sika deer were not farmed for velvet antlers.
Sika Manu ended Tonga's hopes of a knock-out round spot). On 2 May 2015, Manu captained Tonga in their 2015 Polynesian Cup test-match against Pacific rivals Samoa. On 17 October 2015 Manu captained Tonga again this time in their Asia-Pacific Qualifier match against the Cook Islands for the 2017 Rugby League World Cup. On 7 May 2016, Manu traveled down from Hull to Sydney to captain Tonga in the 2016 Polynesian Cup against Samoa, where he started in the second row in the 18-6 loss at Parramatta Stadium. In 2018 he announced his retirement from international rugby league. Sika Manu Viliami Sikalamu