Dahlheim et al.: Temporal changes in abundance of Phocoena phocoena inhabiting the inland waters of Southeast Alaska 
255 
Innes, S., M. P. Heide-Jorgensen, J. L.Laake, K. L. Laidre, H. 
J. Cleator, P. Richard, and R. E. A. Stewart. 
2002. Surveys of belugas and narwhals in the Canadian 
High Arctic in 1996. NAMMCO Sci. Pub. 4:169-190. 
Jefferson, T. A., and B. E. Curry. 
1994. A global review of porpoise (Cetacea: Phocoenidae) 
mortality in gillnets. Biol. Conserv. 67:167-183. 
Laake, J. L., and D. L. Borchers. 
2004. Methods for incomplete detection at distance zero. 
In Advanced distance sampling (S. T. Buckland, D. R. 
Anderson, K. P. Burnham, J. L. Laake, D. L. Borchers, 
and L. Thomas, eds.), p. 108-189. Oxford Univ. Press, 
Oxford, UK. 
Laake, J. L., J. Calambokidis, S. D. Osmek, and D. J. Rugh. 
1997. Probability of detecting harbor porpoise from aer- 
ial surveys: estimating g(0). J. Wildl. Manage. 61:63- 
75. [Available at http://www.jstor.org/stable/3802415.] 
Leatherwood, S., and R. R. Reeves. 
1978. Porpoises and dolphins. In Marine mammals of 
the eastern North Pacific and arctic waters (D. Haley, 
ed.), p. 97-111. Pacific Search Press, Seattle. 
Lerczak, J. A., and R. C. Hobbs. 
1998. Calculating sighting distances from angular read- 
ings during shipboard, aerial, and shore-based marine 
mammal surveys. Mar. Mamm. Sci. 14:590-598. 
Marques, F. F. C., and S. T. Buckland. 
2003. Incorporating covariates into standard line tran- 
sect analyses. Biometrics 59:924-935. [Available at 
http://www.jstor.org/stable/3695332.] 
Palka, D. 
1995. Abundance estimate of the Gulf of Maine har- 
bor porpoise. Spec. Issue Rep. Int. Whaling Comm. 
16:27-50. 
1996. Effects of Beaufort sea state on the sightability of 
harbor porpoises in the Gulf of Maine. Rep. Int. Whal- 
ing Comm. 46:575-582. 
Palka, D. L., and P. S. Hammond. 
2001. Accounting for responsive movement in line tran- 
sect estimates of abundance. Can. J. Fish. Aquat. Sci. 
58:777-787. 
Read, A. J., and D. E. Gaskin. 
1988. Incidential catch of harbor porpoises by gill 
nets. J. Wildl. Manage. 52:517-523. [Available at 
http://www.jstor.org/stable/3801603.] 
Read, A. J. 
1994. Interactions between cetaceans and gillnet and 
trap fisheries in the Northwest Atlantic. Spec. Issue 
Rep. Int. Whaling Comm. 15:133-147. 
Read, A. J., S. D. Kraus, K. D. Bisack, and D. Palka. 
1993. Harbor porpoise and gill nets in the Gulf of 
Maine. Conserv. Biol. 7:189-193. [Available at http:// 
www.jstor.org/stable/2386656.] 
Rosel, P. E. 
1992. Genetic population structure and systematic rela- 
tionships of some small cetaceans inferred from mito- 
chondrial DNA sequence variation. Ph.D. diss., 191 p. 
Univ. Calif. San Diego, CA. 
Rosel, P. E., A. E. Dizon, and M. G. Haygood. 
1995. Variability of the mitochondrial control region in 
populations of the harbour porpoise, Phocoena, on inter- 
oceanic and regional scales. Can. J. Fish. Aquat. Sci. 
52:1210-1219. 
Rosel, P. E., S. C. France, J. Y. Wang, and T. D. Kocher. 
1999. Genetic structure of harbour porpoise Phocoena 
phocoena populations in the northwest Atlantic based 
on mitochondrial and nuclear markers. Mol. Ecol. 
8:S41-S54. 
Taylor, B. L., and P. K. Dawson. 
1984. Seasonal changes in density and behavior of har- 
bor porpoise (Phocoena phocoena) affecting census meth- 
odology in Glacier Bay National Park, Alaska. Rep. 
Int. Whaling Comm. 34:479-483. 
Westgate, A. J., and K. A. Tolley. 
1999. Geographical differences in organochlorine con- 
taminants in harbour porpoises Phocoena phocoena 
from the western North Atlantic. Mar. Ecol. Prog. Ser. 
177:255-268. 
Williams, R., and L. Thomas. 
2007. Distribution and abundance of marine mammals 
in the coastal waters of British Columbia, Canada. J. 
Cetacean Res. Manage. 9:15-28. 
Woodley, T. H., and A. J. Read. 
1991. Potential rates of increase of a harbor porpoise, 
Phocoena phocoena, population subjected to incidental 
mortality in commercial fisheries. Can. J. Fish. Aquat. 
Sci. 48:2429-2435. 
Zerbini, A. N., J. M. Waite, J. L. Laake, and P. R. Wade. 
2006. Abundance, trends and distribution of baleen 
whales off Western Alaska and the central Aleutian Is- 
lands. Deep-Sea Res. I 53:1772-1790. 
