Weinberg et al.: Capture probablity of a survey trawl for Para/ithodes camtschaticus 



749 



to claim that the stock is in any better condition than 

 the condition that was determined by the most recent 

 assessment. The foremost utility of the AFSC annual 

 EBS surveys is to monitor distribution and abundance 

 trends through time. The survey accomplishes this by 

 maintaining strict protocols and consistency in trawling 

 methods, in computation of area-swept abundance, and 

 in nonenvironmentally affected trawl efficiency. The 

 survey times series is designed to detect changes in 

 abundance, signaling advances in the population's re- 

 building processes, regardless of whether crab are 100% 

 or 80% vulnerable to the survey trawl. We advocate that 

 careful consideration be given to the other factors that 

 drive the management model, along with the results of 

 our capture efficiency experiment, to ensure that the 

 stock rebuilding process remains uninterrupted. 



Acknowledgments 



We are thankful to Captain Glenn Sullivan and the crew 

 of the FV Arcturus for their professional attitudes and 

 relentless attention to detail; to scientists Chris John- 

 ston, Frank Shaw, and Kerim Aydin for their assistance 

 at sea following the 2002 survey; to Craig Rose and Scott 

 McEntire for technical support; to Dave King and Jim 

 Smart for preparation of the experimental trawl gear; 

 and to Gary Walters, Braxton Dew, Doug Pengilly, Jie 

 Zheng, and our anonymous reviewers for their helpful 

 comments during the manuscript review process. 



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