Research Document - 2008/068
A Proposal for Status Indicators, Status Classifications, and Management Actions for Atlantic Salmon Populations in the Maritimes Region
By P.G. Amiro
Abstract
In response to a diversity of information, population structures, data, and status of wild Atlantic salmon among rivers of eastern Canada, this research document proposes and evaluates a framework of indicators that may be applicable across a wide range of populations. Indicators and subsets are proposed and applied to a range of rivers and groups of rivers in areas proposed as Conservation Units (CU) that are known to be in a variety of conservation states. Indicators were standardized to a proportionate scale and assessed using proposed benchmarks suggested by historical, national, and international advisory groups that signaled a progression of proposed management actions. Salmon in a river that was listed as endangered was used to assess the performance of various combinations of indicators and benchmarks. A retrospective analysis of the endangered CU indicated for that benchmarks set at a 50% decline rate were overly cautious, while a 75% decline rate was more cautious than the historical case. Using several subsets of indicators and the proposed benchmarks, most rivers and CUs in the Maritimes Region would classify as requiring adjustment of human induced mortality, threat assessment, and management review and/or recovery actions.
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