Accuracy and Precision of Estimating Age of Gray Wolves by Tooth Wear
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....
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| Veröffentlicht in: | The Journal of wildlife management 2000-07, Vol.64 (3), p.752-758 |
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| container_title | The Journal of wildlife management |
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| creator | Gipson, Philip S. Ballard, Warren B. Nowak, Ronald M. Mech, L. David |
| description | 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 ±1 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. |
| doi_str_mv | 10.2307/3802745 |
| format | Article |
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David</creator><creatorcontrib>Gipson, Philip S. ; Ballard, Warren B. ; Nowak, Ronald M. ; Mech, L. David</creatorcontrib><description>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 ±1 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.</description><identifier>ISSN: 0022-541X</identifier><identifier>EISSN: 1937-2817</identifier><identifier>DOI: 10.2307/3802745</identifier><identifier>CODEN: JWMAA9</identifier><language>eng</language><publisher>Bethesda, MD: The Wildlife Society</publisher><subject>Age ; Aging ; Animal populations ; Animal, plant and microbial ecology ; Biological and medical sciences ; Canada, Ontario ; Canis lupus ; Estimates ; Fundamental and applied biological sciences. Psychology ; General aspects. 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David</creatorcontrib><title>Accuracy and Precision of Estimating Age of Gray Wolves by Tooth Wear</title><title>The Journal of wildlife management</title><description>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 ±1 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.</description><subject>Age</subject><subject>Aging</subject><subject>Animal populations</subject><subject>Animal, plant and microbial ecology</subject><subject>Biological and medical sciences</subject><subject>Canada, Ontario</subject><subject>Canis lupus</subject><subject>Estimates</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>General aspects. 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| ispartof | The Journal of wildlife management, 2000-07, Vol.64 (3), p.752-758 |
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| language | eng |
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| source | Jstor Complete Legacy |
| subjects | Age Aging Animal populations Animal, plant and microbial ecology Biological and medical sciences Canada, Ontario Canis lupus Estimates Fundamental and applied biological sciences. Psychology General aspects. Techniques Methods and techniques (sampling, tagging, trapping, modelling...) Teeth USA, Alaska USA, Minnesota Wolves |
| title | Accuracy and Precision of Estimating Age of Gray Wolves by Tooth Wear |
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