期刊
AMERICAN JOURNAL OF PRIMATOLOGY
卷 72, 期 11, 页码 1026-1037出版社
WILEY
DOI: 10.1002/ajp.20846
关键词
tooth wear; aging; dental senescence; offspring survival; life history; mammal; captivity effects
类别
资金
- St. Louis Zoo [06-1]
- Primate Conservation Inc
- International Primatological Society
- Indianapolis Zoo
- University of North Dakota
- North Dakota EPSCoR
- American Society of Primatologists
- Lindbergh Fund
- John Ball Zoo Society
- National Geographic Society
- University of Colorado-Boulder
- National Science Foundation [BCS 0922465, BNS 8619240]
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- World Wildlife Fund
- USAID
- Fullbright Senior Research Grant
- Washington University
- Direct For Social, Behav & Economic Scie
- Division Of Behavioral and Cognitive Sci [0922465] Funding Source: National Science Foundation
Tooth wear is generally an age-related phenomenon, often assumed to occur at similar rates within populations of primates and other mammals, and has been suggested as a correlate of reduced offspring survival among wild lemurs. Few long-term wild studies have combined detailed study of primate behavior and ecology with dental analyses. Here, we present data on dental wear and tooth loss in older (> 10 years old) wild and captive ring-tailed lemurs (Lemur catta). Among older ring-tailed lemurs at the Beza Mahafaly Special Reserve (BMSR), Madagascar (n=6), the percentage of severe dental wear and tooth loss ranges from 6 to 50%. Among these six individuals, the oldest (19 years old) exhibits the second lowest frequency of tooth loss (14%). The majority of captive lemurs at the Indianapolis Zoo (n=7) are older than the oldest BMSR lemur, yet display significantly less overall tooth wear for 19 of 36 tooth positions, with only two individuals exhibiting antemortem tooth loss. Among the captive lemurs, only one lemur (a nearly 29 year old male) has lost more than one tooth. This individual is only missing anterior teeth, in contrast to lemurs at BMSR, where the majority of lost teeth are postcanine teeth associated with processing specific fallback foods. Postcanine teeth also show significantly more overall wear at BMSR than in the captive sample. At BMSR, degree of severe wear and tooth loss varies in same aged, older individuals, likely reflecting differences in microhabitat, and thus the availability and use of different foods. This pattern becomes apparent before old age, as seen in individuals as young as 7 years. Among the four older female lemurs at BMSR, severe wear and/or tooth loss do not predict offspring survival. Am. J. Primatol. 72:1026-1037, 2010. (C) 2010 Wiley-Liss, Inc.
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