NOTE Graves et al,: An evaluation of satellite tags for estimating postrelease survival of Makaira nigricans 



141 



% 15 



31+ 30 29 28 27 26 25 24 23 22 

 Temperature ( C) 



Figure 4 



Distribution of time at temperature for eight of nine blue marlin 

 equipped with pop-up satellite tags near Bermuda. 25 July-11 

 August 1999. Histogram represents combined data for the five-day 

 period of data transmission for each individual. 



lin than that recommended by the manufacturer-, at least 

 in the short term. Thus a pop-up tag of this size might be 

 tested on even smaller specimens or other target species 

 to expand the study of behavior in a wider size range of 

 species than was originally thought possible. 



Acknowledgments 



The authors would like to thank Captains Alan DeSilva, 

 Andrew Card, Gilbert Amaral and Bobby Rego for pro- 

 viding assistance in deploying the pop-up tags. We also 

 express our appreciation to the anglers and to the orga- 

 nizing committee of the Bermuda Billfish Tournament for 

 their support. Paul Howey and Molly Lutcavage provided 

 expert technical advice. Phil Goodyear made helpful com- 

 ments on the manuscript. Support for this project was 

 obtained from the Bermuda Department of Agriculture 

 and Fisheries, the ICCAT Enhanced Research Program for 

 Billfish, and Hewit Family Foundation. 



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