摘要：The value society places on salmon has changed over time. Values of salmon were quite low relative to other uses during the period of irrigation, hydropower and navigation development. This short sighted view of resource values leaves a dwindling number of salmon and a legacy of property rights which are difficult to change even though they may be viewed as inappropriate for the future. Recently, the Endangered Species Act (ESA) has been involved to halt the population decline. However, the ESA is a narrow and inflexible tool to apply to complicated biological and
