Using Molar Attrition to Age Live Prairie Dogs

Hoogland, John L.; Hutter, Janice M.

doi:10.2307/3801023

The Journal of Wildlife Management

1987

DOI: 10.2307/3801023

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Using Molar Attrition to Age Live Prairie Dogs

John L. Hoogland¹,

Janice M. Hutter²

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Cited by 4 publications

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“…Few non-destructive techniques are available for estimating age of ground-dwelling squirrels (Sherman et al 1985;Hoogland and Hutter 1987;Cox and Franklin 1990;Stockrahm and Seabloom 1990), and generality to other species is known for none. One of these techniques, the premolar gap, has proven useful in estimating the ages of Black-tailed Prairie Dogs (Cynomys ludovicianus) (Cox and Franklin 1990).…”

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confidence: 99%

The relation between premolar wear and age in Yellow-bellied Marmots, Marmota flaviventris

Van Vuren,

Salsbury

1992

The Canadian Field-Naturalist

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mentioning

confidence: 99%

The relation between premolar wear and age in Yellow-bellied Marmots, Marmota flaviventris

Van Vuren,

Salsbury

1992

The Canadian Field-Naturalist

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Age at Vaccination May Influence Response to Sylvatic Plague Vaccine (SPV) in Gunnison’s Prairie Dogs (Cynomys gunnisoni)

et al. 2015

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Gunnison's prairie dogs (Cynomys gunnisoni) have been considered at greater risk from Yersinia pestis (plague) infection in the montane portion of their range compared to populations at lower elevations, possibly due to factors related to flea transmission of the bacteria or greater host susceptibility. To test the latter hypothesis and determine whether vaccination against plague with an oral sylvatic plague vaccine (SPV) improved survival, we captured prairie dogs from a C. g. gunnisoni or "montane" population and a C. g. zuniensis or "prairie" population for vaccine efficacy and challenge studies. No differences (P = 0.63) were found in plague susceptibility in non-vaccinated animals between these two populations; however, vaccinates from the prairie population survived plague challenge at significantly higher rates (P < 0.01) than those from the montane population. Upon further analysis, we determined that response to immunization was most likely associated with differences in age, as the prairie group was much younger on average than the montane group. Vaccinates that were juveniles or young adults survived plague challenge at a much higher rate than adults (P < 0.01 and P = 0.02, respectively), but no difference (P = 0.83) was detected in survival rates between control animals of different ages. These results suggest that host susceptibility is probably not related to the assumed greater risk from plague in the C. g. gunnisoni or "montane" populations of Gunnison's prairie dogs, and that SPV could be a useful plague management tool for this species, particularly if targeted at younger cohorts.

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Age-related change in spurs and spur sheaths of the platypus (Ornithorhynchus anatinus)

2013

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Non-invasive techniques for age assessment of wild mammals are needed for effective species management as well as research. In the case of the platypus, we investigated how morphology of calcaneal spurs and associated features in males and vestigial spur sheaths in females varies with age. Total spur length in males (spur tip to base of subtending epidermal collar) is greatest at 19–24 months and falls thereafter, with significant linear relationships evident between spur length and age of subadults (13–24 months old) and adults (≥25 months old). However, collar length/total spur length discriminates better between subadults and older animals than either collar length or total spur length alone. Juveniles can be reliably identified up to the age of 12 months (males) and 9 months (females) by the presence, respectively, of a sheath encasing the spur or a rudimentary spur sheath. A small proportion of young subadults (males, 4%; females, ≤2%) will be misclassified as juveniles due to sheaths being retained for longer than normal. Studies that need to identify juveniles very accurately as an age class should avoid sampling populations from August–October on the south-eastern Australian mainland (or May–October if subadult males also need to be identified correctly).

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Using Molar Attrition to Age Live Prairie Dogs

Cited by 4 publications

References 3 publications

The relation between premolar wear and age in Yellow-bellied Marmots, Marmota flaviventris

The relation between premolar wear and age in Yellow-bellied Marmots, Marmota flaviventris

Age at Vaccination May Influence Response to Sylvatic Plague Vaccine (SPV) in Gunnison’s Prairie Dogs (Cynomys gunnisoni)

Age-related change in spurs and spur sheaths of the platypus (Ornithorhynchus anatinus)

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