FUSARO: GROWTH RATE OF THE SAND CRAB 



1974), thus confounding the issue of reproductive 

 success for a population in a particular habitat. 

 Thus "relative reproductive success" may not be as 

 good a criterion between populations such as these 

 as it is between species. Measurement of differ- 

 ences in such life history factors as growth rate 

 may, therefore, take on added significance in the 

 comparison of two populations or species in differ- 

 ing environments, inasmuch as they do not depend 

 on the assumption of genetic isolation but concern 

 themselves more with the relationship of the 

 population to its particular environmental cir- 

 cumstances. 



ACKNOWLEDGMENTS 



I thank A. M. Wenner for consultation through- 

 out the study and for his critical review of the 

 manuscript, and J. Childress, A. Oaten, and J. 

 King for their critical review of the manuscript. I 

 thank C. Stanton of Santa Cruz Island Company 

 for use of the island site studied, and L. Laughrin 

 of the University of California Santa Cruz Island 

 Field Station for the support facilities under his 

 charge. I also thank P. Kearney for assistance in 

 typing the manuscript. 



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