918 



Fishery Bulletin 97(4), 1999 



ing and modeling of these populations. This situa- 

 tion appears to be unique among social mammals 

 (e.g. the lack of male dispersal), with the possible 

 exception of the long-finned pilot whale. In that spe- 

 cies, molecular typing revealed that pod members 

 also form extended family groupings from which in- 

 dividuals do not disperse (Amos et al., 1993). Mo- 

 lecular typing of individual whales described in this 

 study is currently in progress (Barrett-Lennard-). 



Acknowledgments 



Work from 1989-92 was funded as part of the dam- 

 age-assessment program of the Exxon Valdez Oil 

 Spill (EVOS) Trustee Council. The EVOS Trustee 

 Council also provided funds in 1995 for field work 

 and analysis as part of the oil-spill restoration pro- 

 gram. Work in 1984 was supported by Hubbs Sea 

 World Research Institute, and fieldwork in 1986 was 

 supported by Alaska Sea Grant and the National 

 Marine Mammal Laboratory. Data for killer whale 

 pods in Prince William Sound in 1985, 1987, 1988, 

 1993, and 1994, and in March 1989 following the 

 EVOS, were provided by the North Gulf Oceanic So- 

 ciety. The Society was funded by private donations, 

 the Alaska State Legislature, the Sail Alaska Foun- 

 dation, and the Alaska Sea Grant program. 



The project would not have been possible without 

 the participation of L. Barrett-Lennard, K. Heise, O. 

 von Ziegesar, and K. Balcomb-Bartok, who led field 

 efforts at various times. Field assistance or other 

 substantial contributions were made by R. Angliss, 

 L. Daniel, K. Englund, F. Felleman, M. Freeman, B. 

 Goodwin, M. Hare, M. James, L. Larsen, J. Lyle, E. 

 Miller, L. Saville, C. Schneider, R. Blancato, S. A. 

 Sikema, K. Turco, and E. Weintraub. E. Miles of Miles 

 Photo Lab provided all photographic development 

 and printing services. 



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