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The Resource or Oncorhynchus Stock and the Ways of Its Protection in China

Yang Fuyi(Changchun Institute of Geography, Academia Sinica, Changchun 130021 ).  
Oncorhynchus stock are the special product economic fish of the Heilongjiang and Jilin province in China, but its resource has been remakable recession in the last twenty years. In this paper,according to the investigation over a long period of time, natural distribution,economic value,charcteristics and present situation of chinese oncorhynchus reource were discussed at the moment, the causes of its resource recession as wall as problems existed in resource utilization were studied,and the ways of protection on it were poseed tentatively.
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