perhaps some form of biological control must be 

 instituted. However, more detailed information 

 is needed about the life history and biology of the 

 spiny dogfish before any management plan can be 

 drawn up. 



ACKNOWLEDGMENTS 



Robert L. Edwards contributed many valuable 

 observations on the dogfish in the Southern New 

 England industrial fishery. Raymond L. Fritz 

 collected specimens and made many of the obser- 

 vations at sea. 



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552 



U.S. FISH AND WILDLIFE SERVICE 



