Research Document - 2011/013
A Controlled Experiment (Strawman draft) to Test the Impact of Removals of Grey Seals on the Mortality of Southern Gulf Cod
By M. Hammill and D. Swain
Abstract
In the southern Gulf of St. Lawrence, the weight of evidence suggests that grey seal predation is limiting the recovery of the 4T cod stock and other species such as white hake and skate populations as well. An experiment was outlined to test this hypothesis. Under the proposed experiment clear longterm cod and seal management objectives must be identified, minimum realistic and ecosystem modeling simulations must be completed to identify possible benefits and impacts and then data must be collected to monitor changes in the abundance and dynamics of the seal and cod populations to ensure that the management objectives are attained and to be able to evaluate the effectiveness of the experiment in attaining these objectives.
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