Contents-continued 



O'CONNELL, CHARLES P. Percentage of starving northern anchovy, Engraulis 

 mordax, larvae in the sea as estimated by histological methods 475 



EBEL, WESLEY J. Transportation of chinook salmon, Oncorhynchus tshawytscha, 

 and stee\\ieaid,Salmo gairdneri, smolts in the Columbia River and effects on adult 

 returns 491 



BENIRSCHKE, K., MARY L. JOHNSON, and ROLF J. BENIRSCHKE. Is ovula- 

 tion in dolphins, Stenella longirostris and Stenella attenuata, always copulation- 

 induced? 507 



Notes 



PEARCY, WILLIAM G. A large, opening-closing midwater trawl for sampling 

 oceanic nekton, and comparison of catches with an Isaacs-Kidd midwater trawl . . 529 



COE, JAMES M., and WARREN E. STUNTZ. Passive behavior by the spotted 

 dolphin, Stenella attenuata, in tuna purse seine nets 535 



KRAEUTER, JOHN N., and MICHAEL CASTAGNA. Effects of large predators on 

 the field culture of the hard clam, Mercenaria mercenaria 538 



PARKER, KEITH. A direct method for estimating northern anchovy, Engraulis 

 mordax, spawning biomass 541 



PITCHER, KENNETH W Food of the harbor seal, Phoca uitulina richardsi, in the 

 Gulf of Alaska 544 



JOHNSON, JAMES H. Production and growth of subyearling coho salmon, On- 

 corhynchus kisutch, chinook salmon, Oncorhynchus tshawytscha, and steelhead, 

 Salmo gairdneri, in Orwell Brook, tributary of Salmon River, New York 549 



* GPO 696-404 



