Accuracy and Precision of Estimating Age of Gray Wolves by Tooth Wear
Entry ID: usgs_npwrc_graywolves

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Summary
Abstract: We evaluated the accuracy and precision of tooth wear for aging gray wolves
(Canis lupus) from Alaska, Minnesota, and Ontario based on 47 known-age or
known-minimum-age skulls. Estimates of age using tooth wear and a commercial
cementum annuli-aging service were useful for wolves up to 14 years old. The
precision of estimates from cementum annuli was greater than estimates from
tooth wear, but tooth wear estimates are more applicable in the field. We
tended to overestimate age by 1-2 years and occasionally by 3 or 4 years. The
commercial service aged young wolves with cementum annuli to within year of
actual age, but under estimated ages of wolves 9 years old by 1-3 years. No
differences were detected in tooth wear patterns for wild wolves from Alaska,
Minnesota, and Ontario, nor between captive and wild wolves. Tooth wear was not
appropriate for aging wolves with an underbite that prevented normal wear or
severely broken and missing teeth.

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Link: GET DATA
Description: Accuracy and Precision of Estimating Age of Gray Wolves by Tooth Wear data.


Geographic Coverage
 N: 55.0 S: 43.5  E: -75.0  W: -168.0

Data Set Citation
Dataset Originator/Creator: Philip S. Gipson, Warren B. Ballard, Ronald M. Nowak, L. David Mech
Dataset Title: Accuracy and Precision of Estimating Age of Gray Wolves by Tooth Wear
Dataset Release Date: 2000
Dataset Release Place: Jamestown, North Dakota
Dataset Publisher: USGS, Northern Prairie Wildlife Research Center
Version: Version 30APR2001
Online Resource: http://www.npwrc.usgs.gov/resource/mammals/toothage/index.htm


Location Keywords
CONTINENT > NORTH AMERICA > CANADA > Ontario
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > ALASKA
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > MINNESOTA


Science Keywords
BIOLOGICAL CLASSIFICATION >ANIMALS/VERTEBRATES >MAMMALS >CARNIVORES >DOGS/FOXES/WOLVES >WOLF
BIOSPHERE >ECOLOGICAL DYNAMICS >SPECIES/POPULATION INTERACTIONS >SPECIES LIFE HISTORY >AGE ESTIMATION    [Definition]


ISO Topic Category
BIOTA


Access Constraints
None


Use Constraints
None


Keywords
Age estimation
Canis lupus
tooth wear
wolf


Data Set Progress
COMPLETE


Data Center
Northern Prairie Wildlife Research Center, Biological Resources Division, U.S. Geological Survey, U.S. Department of the Interior    [Information]
Data Center URL: http://www.npwrc.usgs.gov/

Data Center Personnel
Name: TOM SKLEBAR
Phone: 701-253-5500
Phone: 701-253-5554
Fax: 701-253-5553
Email: tom_sklebar at usgs.gov
Contact Address:
8711 37th Street, S.E.
City: Jamestown
Province or State: North Dakota
Postal Code: 58401
Country: USA



Distribution
Distribution_Media: Download
Distribution_Size: 70 kbytes
Distribution_Format: zip
Fees: none


Personnel
PHILLIP S. GIPSON
Role: TECHNICAL CONTACT
Phone: (785) 532-6070
Email: gipson at ksu.edu
Contact Address:
Kansas State University
Division of Biology
City: Manhattan
Province or State: KS
Postal Code: 66506-4901
Country: USA


TYLER B. STEVENS
Role: DIF AUTHOR
Phone: (301) 614-6898
Fax: 301-614-5268
Email: Tyler.B.Stevens at nasa.gov
Contact Address:
NASA Goddard Space Flight Center
Global Change Master Directory
City: Greenbelt
Province or State: MD
Postal Code: 20771
Country: USA


Publications/References
Gipson, Philip S., Warren B. Ballard, Ronald M. Nowak, and L. David Mech.
2000. Accuracy and precision of estimating age of gray wolves by tooth wear. Journal of Wildlife Management 64(3):752-758.

Kansas Cooperative Fish and Wildlife Research Unit, U.S. Geological Survey,
Division of Biology, Leasure Hall, Room 205, Kansas State University,
Manhatten, KS 66506, USA

Department of Range, Wildlife and Fisheries Management, Box 42125, Texas Tech University, Lubbock, TX 79409, USA

U.S. Fish and Wildlife Service, 4401 North Fairfax Drive, Room 750,
Arlington, VA 22203, USA Present address: 2101 Greenwich Street, Falls Church, VA 22043, USA.

Biological Resources Division, U.S. Geological Survey, Northern Prairie
Wildlife Research Center, 8711 37th Street, Jamestown, ND 58401, USA
Mailing address: North Central Research Station, 1992 Folwell Avenue, St.
Paul, MN 55108, USA

Creation and Review Dates
DIF Creation Date: 2002-01-28
Last DIF Revision Date: 2012-12-21
Future DIF Review Date: 2003-01-28

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