438 



Fishery Bulletin 91(3), 1993 



I 



20 40 SO 



WET WEIGHT (kg) 



Figure 10 



Relationship between water content of muscle, blubber and bone 

 vs. total wet weight of body in kilograms for spotted dolphins 

 iStenella attenuata) from the eastern tropical Pacific Ocean, both 

 sexes and all ages (sizes I represented. Lines through points are 

 fitted regressions. 



WET WEIGHT (kg) 



Figure 1 1 



Estimated relationship between total energy density and total 

 wet weight of body in kilograms for spotted dolphin {Stenella 

 attenuata) from the eastern tropical Pacific Ocean, both sexes and 

 all ages (sizes) represented. 



spotted dolphins, as these small cetaceans appear to 

 reside continually within the relatively constant (com- 

 pared to temperate and polar regions) environment of 

 the eastern tropical Pacific Ocean (Fiedler, 1990). 

 There is apparently little need for these animals to 

 develop and sequester significant energy reserves and 

 insulation for conducting lengthy migrations to or 

 through areas of little food, or through areas of cold 

 water. 



Acknowledgments 



The author gratefully acknowledges the help pro- 

 vided by Gretchen Tripp, Graham Worthy, David 

 Murnane, Ann Pabst, Ann Crossland, and Mwenda 

 Kidumu during various stages of dissection, chemi- 

 cal processing, and statistical analysis of samples. 

 Thanks for the figures are due Henry Orr. Com- 

 ments of two anonymous reviewers substantially 

 improved the manuscript. 



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