Sharp, G.D. 1977. Potential vulnerability zones for 

 skipjack and yellowfin in the Indian Ocean. Proc. 

 28th Tuna Conference. Lake Arrowhead, Calif. 

 Oct. 3-4, 1977, p. 15-18. 



Used monthly maps of the average distribution 

 of "vulnerability zones" for yellowfin and 

 skipjack in the Indian Ocean to examine the 

 seasonal variation in location of potential 

 zones to be occupied by the fish. 



KEY WORDS: tuna, skipjack, yellowfin, dis- 

 tribution, habitat, oceanography, tempera- 

 ture, oxygen, depth. 



Sharp, G.D. 1978. Behavioral and physiological prop- 

 erties of tunas and their effects on vulnerability 

 to fishing gear. I_n G.D. Sharp and A.E. Dizon 

 (editors). The physiological ecology of tunas, p. 

 397-449. Acad. Press, N.Y. 



Using a background of physiological experi- 

 mental data the oceanic environment suitable 

 for the tuna habitat is described. Also con- 

 sidered is the effect of environment on sus- 

 ceptibility to capture. 



KEY WORDS: tuna, yellowfin, albacore, skip- 

 jack, bigeye, bluefin, environment, habitat, 

 oceanography, temperature, depth, fronts, 

 distribution, migration, season, food, 

 spawning, age/size, currents, wind. 



Shimada, B.M. 1958. Geographical distribution of the 

 annual catches of yellowfin and skipjack tuna from 

 the eastern tropical Pacific Ocean from vessel 

 logbook records, 1952-1955. Inter-Am. Trop. Tuna 

 Comm. Bull. 2:289-363. 



Discussed year to year variations in catch 

 distributions in relation to oceanic circula- 

 tion and nutrient supplies. Also considered 

 the El Nino abnormal conditions and their 

 influence on catch. 



KEY WORDS: tuna, yellowfin, skipjack, ocean- 

 ography, distribution, catch. 



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