GREENBLATT ASSOCIATIONS OF TLINA WITH FLOTSAM 



ful. Richard McNeely first suggested the possible 

 interaction of porpoise and flotsam-associated 

 tuna. The Inter-American Tropical Tuna Com- 

 mission provided much of the data. William Flerx 

 and Richard Charter provided insight into the op- 

 eration of the fishery. Gary Sharp provided useful 

 information about yellowfin tuna. Rainfall data 

 were obtained from Eric Forsbergh. William 

 Lenarz, Douglas Chapman, and Robin Allen re- 

 viewed the paper and offered constructive com- 

 ments. 



LITERATURE CITED 



Bayliff, W. H., and C. J. Orange. 



1967. Observations on the purse seine fishery for tropical 

 tunas in the eastern Pacific Ocean. Inter-Am. Trop. 

 Tuna Comm., Intern. Rep. 4, 79 p. 



Calkins, T. P. 



1965. Variation in size of yellowfin tuna iThunnus alba- 

 cares) within individual purse-seine sets. [In Engl, and 

 Span.) Inter-Am, Trop, Tuna Comm., Bull. 10:461-524. 

 GOODING. R. M., AND J. J. MAGNUSON. 



1967. Ecological significance of a drifting object to pelagic 

 fishes. Pac. Sci. 21:486-497. 



Green. R. E., W. F, Perrin, and B, P, Petrich, 



1971. The American tuna purse seine fishery. In H. 

 Kristjonsson (editor), Modern fishing gear of the world. 

 Vol. 3. p, 182-194, Fishing News (Books) Ltd.. Lond, 

 GREENBLATT, P, R, 



1977. Factors affecting tuna purse seine fishing ef- 



fort, ICCATRep.Vol. VI(SCRS-1976). No, 1  Tropical 

 spp,. p, 18-31. 



Hunter, J. R., and C. T. Mitchell, 



1968. Association of fishes with flotsam in the offshore 

 waters of Central America. U.S. Fish Wildl, Serv, Fish. 

 Bull. 66:13-29. 



Inter-American Tropical Tuna Commission. 



1967-1976. Annual Report, 1966-1975. Inter-Am. Trop. 

 Tuna Comm., La Jolla, Calif 



KNunsEN. P. F. 



1977. Spawning of yellowfin tuna and the discrimination 

 of subpopulations, [In Engl, and Span.[ Inter-Am, Trop, 

 Tuna Comm,, Bull, 17:117-169. 



PELLA, J. J., AND C. T. PSAROPULOS. 



1975. Measures of tuna abundance from purse-seine oper- 

 ations m the eastern Pacific Ocean, adjusted for fieet-wide 

 evolution of increased fishing power, 1960-1971, [In Engl, 

 and Span.] Inter-Am. Trop. Tuna Comm.. Bull, 16:281- 

 400, 



SCOTT, J, M, 



1969, Tuna schooling terminology Calif Fish Game 

 55:136-140, 



SlEGEL, S. 



1956. Nonparametric statistics for the behavioral 

 sciences. McGraw-Hill Book Co,. N,Y , 312 p. 

 U.S. DEPARTME.NT OF COMMERCE. 



1963-1975. Monthly climatic data for the world, NOAA, 

 Environ, Data Serv,, vol, 16-28, var, pagination, 

 WYRTKI, K, 



1965, Surface currents of the Eastern Tropical Pacific 

 Ocean, [In Engl, and Span] Inter-Am Trop, Tuna Comm., 

 Bull. 9:269-304. 



155 



