FISHl.RY BULLETIN: VOL. 70, NO. 1 



miorht be feasiV)le if constructed of acoustically 

 transi)arent materials, providing: that it were so 

 constructed that the fish in the net would not 

 also use it. 



5. It is to be exjiected that grreat difficulty will 

 be encountered in inducing: wild porpoise to pass 

 throuo:h an opening in the perimeter of a purse- 

 seine enclosure. 



ACKNOWLEDGMENTS 



We thank the Oceanic Institute and its Di- 

 rector. Dr. Kenneth Norris, for providino- the 

 facilities and the porpoise used in this study. 

 William Wasden, National Marine Fisheries 

 Service, Honolulu, Hawaii, assisted in all phases 

 of the study, and por]wise trainers Tng-rid Kano-, 

 Sea Life Park, and Scott Rutherford. Oceanic 

 Institute, provided as.sistance and advice during 

 the course of the experiments. 



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