Holt and Sexton Dolphin abundance in eastern tropical Pacific 



I I 



Acknowledgments 



We acknowledge the biologists who collected the data: 

 S. Benson, C. Bisbee, K. Brownell, S. Buckland, 

 A. Dizon, W. Irwin, R. LeDuc, M. Lynn, M. Newcomer, 

 R. Pitman, L. Robertson, D. Skordal, S. Sinclair, 

 P. Stangl, and M. Webber. We are grateful to A. Jack- 

 son, W. Parks, and S. Reilly for directing the at-sea 

 operations, and .W. Parks and P. Stangl for their 

 shoreside support. We thank J. Barlow, S. Buckland, 

 K. Burnham, D. DeMaster, M. Hall, L. O'Brian, and 

 S. Reilly for reviewing this manuscript. 



Citations 



Au. D., W.L. Ferryman, and W. Perrin 



1979 Dolphin distribution and the relationship to environmental 

 features in the eastern tropical Pacific. Adni. Rep. L,J-79-4.3, 

 Southwest Fish. Cent., Natl. Mar. Fish. Sei-v., NOAA. La.Jolla. 

 CA 92038, .59 p. 



Barlow. J., and R.S. Holt 



1986 Proportions of species of dolphins in the eastern tropical 

 Pacific NOAA-TM-NMFS-SWFC-.56, Southwest Fish. Cent., 

 Natl. Mar. Fish. Serv., NOAA, La Jolla, CA 920.38, 44 p. 



Buckland. S.T. 



1985 Perpendicular distance models for line transect sampling. 

 Biometrics 41:177-195. 

 Burnham, K., D. Anderson, and J. Laake 



1980 Estimation of density from line transect sampling of 

 l)iological populations. Wildl. Monogr. 72, 2(12 |). 



Grain. B.. D. Burnham. D. Anderson, and J. Laake 



1979 A Fourier series estimator of population density for line 

 transect sampling. LItah State LIniv. Press, Logan, 25 p. 

 Drummer, T.D. 



1985 Size-bias in line transect sampling. Ph.D. Diss., Univ. 

 Wyoming, Laramie. 143 p. 

 Gerrodette, T. 



1987 A power analysis for detecting trends. Ecology 68: 

 1364-1372. 



Hayes, R.J., and S.T. Buckland 



1983 Radial distance models for the line transect method. 



Biometrics 39:29-42. 

 Holt. R.S. 



1985. Estimates of abundance of dolphin stocks taken inciden- 

 tally in the eastern tropical Pacific yellowfin tuna fishery. 



Adm. Rep. LJ-85-20, Southwest Fish. Cent., Natl. Mar. Fish. 



Serv., NOAA, La Jolla, CA 92038, 32 p. 

 1987 Estimating density of dolphin schools in the eastern 



tropical Pacific ocean by line transect methods. Fish. Bull., 



U.S. 85:419-434. 

 Holt, R.S., and J.B. Cologne 



1987 Factors affecting line transect estimates <:if dolphin school 



density. .]. Wildl. Manage. 51(4):836-873. 

 Holt. R.S.. and A. Jackson 



1987 Report of a marine mammal siuT/ey of the eastern tropical 



Pacific aboard the Research Vessel McA rthu r July 29-Decem- 



ber 6, 1986. NOAA-TM-NMFS-SWFC-77, Southwest Fish. 



Cent., Natl. Mar. Fish. Serv., NOAA, La Jolla, CA 92038, 



161 p. 



Holt, R.S., and J.E. Powers 



1982 Abundance estimation of dolphin stocks in the eastern 

 tropical Pacific yellowfin tuna fishery determined from aerial 

 and ship surveys to 1979. NOAA-TM-NMFS-SWFC-23, 

 Southwest Fish. Cent., Natl. Mar. Fish. Serv., NOAA, La Jolla, 

 CA 92038, 95 p. 

 Holt, R.S., and S.N. Sexton 



1987 Rejxirt of a marine mammal survey of the eastern tropical 

 Pacific aboard the Research Vessel David Slarr Jnnlini July 

 29-December 5, 1986. NOAA-TM-NMFS-SWFC-76, South- 

 west Fish. Cent., Natl. Mar. Fish. Serv.. NOAA, La Jolla, CA 

 92038, 171 |i. 

 Holt, R.S., T. Gerrodette, and J.B. Cologne 



1987 Research vessel survey design for monitoring dolplnn 

 abundance in the eastern tropical Pacific. Fish. Bull., U.S. 

 85:4.35-446. 

 Perrin. W.F.. M.D. Scott. G.J. Walker, and V.L. Cass 



1984 Review of geographical stocks of tropical dolphins 

 (Stenrtia spp. and DAphituis del])his) in the eastern Pacific. 

 Adm. Rep. LJ-87-02, Southwest Fish. Cent., Natl. Mar. Fish. 

 Serv., NOAA, La Jolla, CA 92038, 68 p. 

 Richey. C.R. 



1976 Memorandum of opinion. CA NO. 74-1465 and CA No. 

 7.5-0227 U.S. District Court, District of Columbia, May 11, 1976. 

 Smith. T.D. 



1979 Report of the status of the porpoise stock workshop 

 (August 27-31, 1979, La .Jolla, CA). Adm. Rep. LJ-79-41. 

 Southwest Fish. Cent., Natl. Mar. Fish. Serv., NOAA, La Jolla, 

 CA 92038, 120 p. 

 SWFC 



1976 Report of the workshop on stock assessment (jf porpoises 

 involved in the eastern tropical Pacific yellowfin tuna fishery. 

 Adm. Rep. LJ-76-29, Southwest Fish. Cent., Natl. Mar. Fisii. 

 Serv., NOAA, La Jolla, CA 92038, 60 p. 



