Contents — continued 



SILLIMAN, RALPH P. Experimental exploitation of competing fish populations ... 872 



CHEN, LO-CHAI, and ROBERT L. MARTINICH. Pheromonal stimulation and me- 

 tabolite inhibition of ovulation in the zebrafish, Brachydanio rerio 889 



OLLA, BORI L., ALLEN J. BEJDA, and A. DALE MARTIN. Activity, movements, 

 and feeding behavior of the cunner, Tautogolabrus adspersus, and comparison of 

 food habits with young tautog, Tautoga onitis, off Long Island, New York 895 



BOTSFORD, LOUIS W., and DANIEL E. WICKHAM. Correlation of upwelling index 

 and Dungeness crab catch 901 



HOPKINS, THOMAS L., and RONALD C. BAIRD. Net feeding in mesopelagic fishes 908 



Notes 



RUCKER, ROBERT R. Gas-bubble disease: Mortalities of coho salmon, Oncorhynchus 

 kisutch, in water with constant total gas pressure and different oxygen-nitrogen 

 ratios 915 



WEBER, DOUGLAS D., and HERBERT H. SHIPPEN. Age-length-weight and dis- 

 tribution of Alaska plaice, rock sole, and yellowfin sole collected from the 

 southeastern Bering Sea in 1961 919 



SLATICK, EMIL, DONN L. PARK, and WESLEY J. EBEL. Further studies regard- 

 ing effects of transportation on sui'vival and homing of Snake River chinook 

 salmon and steelhead trout 925 



PATTEN, BENJAMIN J. Comparative vulnerability of fry of Pacific salmon and 

 steelhead trout to predation by torrent sculpin in stream aquaria 931 



CRAMER, S. P., and J. D. McINTYRE. Heritable resistance to gas bubble disease in 

 fall chinook salmon, Oncorhynchus tshawytscha 934 



INDEX, VOLUME 73 939 



^, -^^ AMERICAS 



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