Application of a double-observer aerial line-transect method to estimate brown bear population density in Southwestern Alaska

Journal of Fish and Wildlife Management

Volumn 1, Issue 1, 2010, Pages 47-58

  Walsh, Patrick ^a   Reynolds, Joel ^b   Collins, Gail ^c   Russell, Brook ^b   Winfree, Michael ^a   Denton, Jeffrey ^d  

^a Togiak National Wildlife Refuge   (United States)

^b U S FISH AND WILDLIFE SERVICE   (United States)

^c Sheldon Hart Mountain National Wildlife Refuge Complex   (United States)

^d BUREAU OF LAND MANAGEMENT   (United States)

Author keywords

Aerial line transects; Contour transects; Distance estimation; Double count; Gamma detection function; Population estimate; Ursus arctos

Indexed keywords

EID: 79956206008     PISSN: None     EISSN: 1944687X     Source Type: Journal    
DOI: 10.3996/JFWM-006     Document Type: Article

References (35)

1. Barnes VG, Smith RB. 1998. Estimates of brown bear abundance on Kodiak Island, Alaska. Ursus 10:1-9.
2. Becker EF, Quang PX. 2009. A gamma-shaped detection function for line-transect surveys with mark-recapture and covariates. Journal of Agricultural, Biological, and Environmental Statistics 14:207-223.
3. Bellemain E, Swenson JE, Tallmon D, Brunberg D, Taberlet P. 2005. Estimating population size of elusive animals with DNA from hunter-collected feces: four methods for brown bears. Conservation Biology 19:150-161.
4. Boulanger J, White GC, McLellan BN, Woods J, Proctor M, Himmer S. 2002. A meta-analysis of grizzly bear DNA mark-recapture projects in British Columbia, Canada. Ursus 13: 137-152.
5. Buckland ST, Anderson DR, Burnham KP, Laake JL, Borchers DL, Thomas L. 2001. Introduction to distance sampling: estimating abundance of biological populations. New York: Oxford University Press.
6. Burnham KP, Anderson DR. 2002. Model selection and multimodel inference: a practical information-theoretic approach. 2nd edition. New York: Springer.
7. Canty A, Ripley B. 2005. Boot: Bootstrap R Functions. R package, version 1.2-24. Available: www.cran.r-project.org (June 2006).
8. Collins GH, Kovach SD, Hinkes MT. 2005. Home range and movements of female brown bears in southwest Alaska. Ursus 16:181-189.
9. Dufresne F. 1967. My way was north; an Alaskan autobiography. New York: Holt, Reinhart, and Winston.
10. Elgmork K. 1991. Estimation of brown bear (Ursus arctos L.) populations bymeans of reports frommoose hunters in central south Norway 1966-68 and 1976-78. Fauna 44:269-274.
11. [ESRI] Environmental Systems Research Institute. 1996a. Arc-View, version 3.3, Environmental Systems Research Institute, Redlands, California.
12. [ESRI] Environmental Systems Research Institute. 1996b. Using Avenue. Redlands, California: Environmental Systems Research Institute.
13. [ESRI] Environmental Systems Research Institute. 1999. Understanding GIS-the ARC/INFO method. Redlands, California: Environmental Systems Research Institute.
14. [ESRI] Environmental Systems Research Institute. 2002. ArcPad, version 6.0, Environmental Systems Research Institute, Redlands, California.
15. Geyer C. 2005. Trust: trust region optimization. R package, version0.1. Available:www.stat.umn.edu/geyer/trust (June2006).
16. Helfield JM. 2001. Interactions of salmon, bear and riparian vegetation in Alaska. Doctoral dissertation. Seattle: University of Washington.
17. Hilby AR. 1986. Results of a hazard rate model relevant to experiments on the 1984/85 IDCR minke whale assessment cruise. Report of the International Whaling Commission 36: 497-498.
18. Hilderbrand GV, Schwartz CC, Robbins CT, Jacoby ME, Hanley TA, Arthur SM, Servheen C. 1999. The importance of meat, particularly salmon, to body size, population productivity, and conservation of North American brown bears. Canadian Journal of Zoology 77:132-138.
19. Kansas JL. 2002. Status of the grizzly bear Ursus arctos in Alberta. Edmonton: Alberta Sustainable Resource Development, Fish and Wildlife Division, and Alberta Conservation Association, Alberta Wildlife Status Report 37. (Available upon request from the lead author.)
20. Kovach SD, Collins GH, Hinkes MT, Denton JW. 2006. Reproduction and survival of brown bears in southwest Alaska, USA. Ursus 17:16-29.
21. Lunneborg CE. 2000. Data analysis by resampling: concepts and applications. Pacific Grove, California: Duxbury Press.
22. Miller SD. 1993. Brown bears in Alaska: a statewide management overview. Juneau: Alaska Department of Fish and Game, Wildlife Technical Bulletin 11.
23. Miller SD, White GC, Sellers RA, Reynolds HV, Schoen JW, Titus K, Barnes VG, Smith RB, Nelson RR, Ballard WB, Schwartz CC. 1997. Brown and black bear density estimation in Alaska using radiotelemetry and replicated mark-resight techniques. Bethesda, Maryland: The Wildlife Society. Wildlife Monographs 133.
24. National Oceanic and Atmospheric Administration. 2008. National Climatic Data Center, Western Regional Climate Center, Reno, Nevada, USA. Available: www.ncdc.noaa.gov/oa/climate/regionalclimatecenters.html (September 2009).
25. Quang PX, Becker EF. 1997. Combining line-transect and double count sampling techniques for aerial surveys. Journal of Agricultural, Biological, and Environmental Statistics 2:230-242.
26. Quang PX, Becker EF. 1999. Aerial survey sampling of contour transects using double-count and covariate data. Pages 87-97 in Garner GW, Amstrup SC, Laake JL, Manly BFJ, McDonald LL, Robertson DG, editors. Marine mammal survey and assessment methods. Rotterdam, Netherlands: Balkema Press.
27. R Development Core Team. 2005. R: a language and environment for statistical computing. R Foundation for Statistical Computing. Available: www.R-project.org (January 2006).
28. Reynolds JH, Russell B, Becker E, Quang P. 2010. GammaMRDS: an R package for fitting gamma-shaped detection models to mark-recapture line-transect data, version 1.0.1.
29. Skalski J, Ryding K, Millspaugh J. 2005. Wildlife demography: analysis of sex, age, and count data. Burlington, Massachusetts: Elsevier.
30. Swenson JE, Sandegren F, Bjarvall A, Sonderberg A, Wabakken P, Franzen R. 1994. Size, trend, distribution and conservation of the brown bear Ursus arctos population in Sweden. Biological Conservation 70:9-17.
31. Tadikamalla PR. 1990. Kolmogorov-Smirnov type test-statistics for the gamma, Erlang-2 and the inverse Gaussian distributions when the parameters are unknown. Communications in Statistics: Simulation and Computation 19:305-314.
32. [USFWS] U.S. Fish and Wildlife Service. 1990. Fishery management plan, Togiak National Wildlife Refuge. Anchorage, Alaska: U.S. Fish and Wildlife Service (available upon request from the lead author).
33. Valdmann H, Saarma U, Karis A. 2001. The brown bear population in Estonia: current status and requirements for management. Ursus 12:31-36.
34. van Belle G. 2002. Statistical rules of thumb. New York: Wiley.
35. Van Daele LJ, Morgart JR, Hinkes MT, Kovach SD, Denton JW, Kaycon RH. 2001. Grizzlies, Eskimos, and biologists: crosscultural bear management in southwest Alaska. Ursus 12: 141-152.