not meet expectations. Understanding the timing 

 and likelihood of such events can improve manage- 

 ment, and since the geographical occurrence of such 

 mortality may often be quite localized, increased 

 harvest in specific locations prior to high natural 

 mortality events might be justified. 



Acknowledgments 



The assistance of F. Chambers and the pilots and 

 support staff of Pisces IV is gratefully acknowl- 

 edged, since without their professional, enthusiastic 

 assistance, the study could not have been conducted. 

 D. Mackas and D. Latrouite, staff of the Department 

 of Oceanography at UBC, T. Butler, and J. Fulton 

 assisted in data collection, analysis and/or species 

 identification, and R. Thomson assisted in interpre- 

 tation of oceanographic events. C. Levings, F. Ber- 

 nard, S. Bowers, J. Boutillier, and two anonymous 

 reviewers provided constructive reviews. The par- 

 ticipation of E. Pikitch was sponsored by NOAA Of- 

 fice of Sea Grant, Department of Commerce, under 

 grant No. NA85AA-D-SG095, project #R/E5-7. 



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