Life Tables for Natural Populations of Animals

Deevey, Edward S.

doi:10.1086/395888

Cited by 1,102 publications

(514 citation statements)

References 11 publications

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“…Survivorship curves of M. balearicus were calculated from the age distribution in the two sites, following the study of Pianka [48]. For comparative purposes, survivorship curves of extant bovid populations were also calculated, including Ovis dalli [49], Bos gaurus [50], Syncerus caffer [51] and Hemitragus jemlahicus [52].…”

Section: (A) Dental Mesowearmentioning

confidence: 99%

Evidence of correlated evolution of hypsodonty and exceptional longevity in endemic insular mammals

et al. 2012

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Here, we test whether the increase in tooth height in insular endemics results from the expansion of the dietary niche under resource limitation, as widely considered, or whether it represents an investment in dental durability in response to the selection for extended longevity under low levels of extrinsic mortality. We tested these hypotheses in the extremely hypsodont fossil bovid Myotragus balearicus from the Balearic Islands, an ideal model to study the evolutionary trends on islands. Dental abrasion was significantly lower in the insular bovid than in highly hypsodont continental artiodactyls, suggesting that feeding habits are not the sole driving force behind increased crown height. However, the estimated longevity for M. balearicus based on dental durability was two times that predicted from body mass. Survivorship curves confirm that an extraordinarily large number of individuals approached the longevity of the species. Our results, hence, provide evidence that hypsodonty in insular endemics is the outcome of selection for increased durability of the permanent dentition in association with an extended lifespan. In the context of insularity, our results lend additional support to the disposable soma theory of ageing confirming the dependency of somatic maintenance and repair on lifespan, and its control by resource availability and extrinsic mortality.

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Section: (A) Dental Mesowearmentioning

confidence: 99%

Evidence of correlated evolution of hypsodonty and exceptional longevity in endemic insular mammals

et al. 2012

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“…the zooarchaeological survivorship curves are representative of a population where there is great mortality in early in life with very few individuals reaching full longevity ( fig. 7.8; Deevey, 1947). Such a pattern is not typical of hard clam populations in southeastern north America that may be considered in equilibrium.…”

Section: Modern Zooarchaeologicalmentioning

confidence: 84%

“…this approach provides an empirical way to assess potential anthropogenic effects of hard clam harvest on natural populations (Quitmyer, Hale, and Jones, 1985;Quitmyer and Jones, 2000). Such techniques are widely used to monitor the effects of harvesting on modern shellfish beds (Deevey, 1947;Hallam, 1972;Fegley, 2001). In this investigation we explore whether the natural distribution of ontogenetic age classes was disrupted by pre-hispanic harvesting pressure on hard clam beds in the Litchfield Beach region.…”

Section: Modern Zooarchaeologicalmentioning

confidence: 99%

“…these dynamic data were plotted as survivorship curves that facilitate the comparison of the modern and zooarchaeological samples (Deevey, 1947;Hallam, 1972;Cerrato, 1980). reSultS oBserveD InCremental shell growth moDern harD Clams: Figure 8.3 presents the monthly frequency of individual clams (n = 507) forming the translucent and opaque increments in relation to annual monthly sea surface temperature (SSt) and precipitation.…”

Section: Isotopic Validation Of Incrementalmentioning

confidence: 99%

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Reitz¹,

Quitmyer²,

Thomas³

et al. 2012

Anthropol. Pap. Am. Mus. Nat. Hist.

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“…Pearl suggested plotting survival curves over centiles of equivalent life span (Pearl 1928), and later over percentage deviation from mean duration of life (Pearl and Miner 1935;Deevey 1947Deevey , 1950. Utilizing this standardized time scale, Pearl and Miner then suggested the now classic distinction between Type I survivorship (rectangular, corresponding to increasing mortality with age), Type II survivorship (diagonal, corresponding to constant mortality with age) and Type III survivorship (L-shaped, corresponding to decreasing mortality with age), which are related to the shape of aging, as discussed by Baudisch (2011).…”

Section: Introductionmentioning

confidence: 99%