Northern anchovy — Cont. 

 larval behavior — -Cont. 



reactive perceptive field 831 



significance of swimming in yolk-sac larvae . . 823 



structure of swimming 824 



swimming behavior 822 



volume of water searched 833 



models of spawning behavior 865 



sampling with a plankton purse seine 792 



Northern lobster 



developmental rates of embryos 95 



New York 581, 598 



Northern puflFer 



New York 581, 591 



Northern sennet 



behavior 194 



development of larvae and juveniles 



eye diameter 188 



fin development 192 



head length 187 



jaws and teeth 187 



keeled scales 189 



myomeres 188 



osteology 189 



pigmentation 193 



snout length 187 



tip of lower jaw 187 



yolk absorption 187 



embryo 187 



mortality 193 



transformation 194 



"Nutrient inversions in the southeastern trop- 

 ical Pacific Ocean," by William H. Thomas 929 



Nutrients 



distribution in northern equatorial latitudes . . 892 



in La Jolla Bay 1970 



phaeo-pigment/chlorophyll ratio 1268 



nitrogenous, in La Jolla Bay 1970 



ammonium 1264 



nitrate 1265 



nitrite 1265 



urea 1265 



Oahu 



anchovy sampling in Kaneohe Bay 789 



Oahu, Hawaii 49, 61 



"Observations on scale patterns and growth of 

 the Pacific sardine reared in the laboratory," by 



Makoto Kimura and Gary T. Sakagawa 1043 



"Ocean distribution, growth, and effects of the 

 troll fishery on yield of fall chinook salmon from 

 Columbia River hatcheries," by Kenneth A. Henry . 431 



Ocean shrimp 

 California 



application of yield models 1021 



biomass estimation 1033 



catch and effort data, 1954-69 1022 



fishing mortality estimates 1031 



spawning biomass and recruitment 1034 



Oceanographer — see Vessels 



O'CONNELL, CHARLES P., and JAMES R. 

 ZWEIFEL, "A laboratory study of particulate 

 and filter feeding of the Pacific mackerel. 

 Scomber japonicus" 973 



Odontobutis cf. obscura — see Moridae 



Oligoplites saunts — see Leatherjacket 



OLLA, BORI L., CAROL E. SAMET, and 

 ANNE L. STUDHOLME, "Activity and feed- 

 ing behavior of the summer flounder (Paralich- 

 thys dentatus L.) under controlled laboratory 

 conditions" 1127 



"On the clarification of larval tuna identification 

 particularly in the genus Thunniis," by Walter 

 M. Matsumoto, Elbert H. Ahlstrom, S. Jones, 

 Witold L. Klawe, William J. Richards, and Shoji 

 Ueyanagi 1 



Oncorhynchus kisutch — see Coho salmon 



Oncorhynchus nerka — see Sockeye salmon 



Oncorhynchus tshawytscha — see Chinook salmon 



One-Shot Creek, Alaska 



study streams for sockeye salmon 447 



Onobrosmius elongatus — see Moridae 



Onobrosmius oligocaenicus — see Moridae 



Ophichthidae — see Snake eels 



Ophidiidae — see Cusk-eels 



Oregon 



ratfish collected for study of its biology 421 



"Oscar Elton Sette," by Philip M. Roedel 523 



"Oscar Elton Sette: fishery biologist," by Pa- 

 tricia Powell 525 



1320 



