WAHLEN: INCIDENTAL DOLPHIN MORTALITY 



associated with dolphins in the eastern Pacific Ocean dur- Snedecor, G. W., and W. G. Cochran. 



ing 1959-1980. [In Engl, and Span.] Inter-Am. Trop. Tuna 1980. Statistical methods. 7th ed. Iowa State Univ. Press, 



Comm. Bull. 18:229-299. Ames, 507 p. 



Smith, T. D. Wahlen, B. E., and T. D. Smith. 



1983. Changes in size of three dolphin (Stenella spp.) popula- 1985. Observer effect on incidental dolphin mortality in the 



tions in the eastern tropical Pacific. Fish. Bull., U.S. 81: eastern tropical Pacific tuna fishery. Fish. Bull., U.S. 83: 



1-13. 521-530. 



569 



