Sika deer lupus hodophilax"), over a century ago. Without its main enemy, the population of sika exploded and it is now overpopulated in many areas, posing a threat to both forests and farmlands. Efforts are now being made to control its population instead of conserving it. None of its subspecies is endangered except the Kerama deer ("C. n. keramae") in the tiny Kerama Islands. In 2015, Japanese Ministry of the Environment estimated the population at 3,080,000 in Japan, including Hokkaido. China used to have the largest population of sika, but thousands of years of hunting and habitat loss have reduced the population
Sika Manu he was named in the final 24-man Kiwi squad and was part of the team that went on to win the tournament. In 2013 Sika, through his Tongan heritage, he made his début for Tonga in their Pacific Rugby League International clash with fierce Pacific rivals Samoa. Later in the year Sika represented Tonga in their unsuccessful 2013 Rugby League World Cup campaign. He played in all 3 of Tonga's matches, scoring two tries. He scored both of his tries in New Zealand's nail-biting 2 point defeat by Scotland (unfortunately the only defeat of their World Cup campaign which ultimately