Science Advisory Report 2009/060
Evaluation of interim harvest strategies for sablefish (Anoplopoma fimbria) in British Columbia, Canada for 2008/09
Summary
- A closed-loop feedback simulation approach was used to identify interim management procedures to guide the choice of the total allowable catch (TAC) in 2008/2009 and subsequent fishing years;
- A catch-at-age operating model was used to define four stock scenarios that represented states of low/high productivity and low/moderate stock depletion levels;
- The performance of data-based and model-based management procedures was evaluated;
- Each management procedure included a harvest control rule compliant with the DFO (2006) harvest strategy policy;
- Management procedures that met objectives showed the capability to improve stock status within 3-7 years with 90% certainty even under the most pessimistic scenario for stock productivity and current status;
- TAC levels for 2008 under the admissible management procedures ranged from 1,500 to 2,700 tonnes; however, most will decrease TACs by up to 50% between 2009 and 2014 if the current stock decline continues.
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