Conservation egg and spawner requirements for Atlantic salmon were estimated for rivers in Atlantic Canada. These estimates were provided in response to a request from the International Council for the Exploration of the Sea (ICES) Working Group on North Atlantic Salmon and were based on the best information available at the time. While ICES requested estimates specifically for the 2SW component, an attempt was made to derive spawner requirements for as many of the various life-history components (1SW, MSW, repeat spawners, etc.) of each stock as possible. There was no consistency among rivers in this regard due to variation in the quantities and kinds of information available. Presented for the first time is a comprehensive list of references documenting the methodologies and origins of parameter values used for the derivation of egg and spawner requirements throughout Atlantic Canada. The process of providing conservation requirements is an evolving one and periodic updates will occur as data deficiencies are overcome.
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