Late bloomers and baby boomers: ecological drivers of longevity in squamates and the tuatara
Aim Longevity is an important life-history trait, directly linked to the core attributes of fitness (reproduction and survival), yet large-scale comparative studies quantifying its implications for the ecology and life history of ectotherms are scarce. We tested the allometry of longevity in squamat...
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| Format: | Article |
| Language: | English |
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John Wiley & Sons, Ltd.
2015
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| Online Access: | http://ir.unimas.my/id/eprint/10697/ http://ir.unimas.my/id/eprint/10697/1/Late%20bloomers.pdf |
| _version_ | 1848836839673167872 |
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| author | Das, I. |
| author_facet | Das, I. |
| author_sort | Das, I. |
| building | UNIMAS Institutional Repository |
| collection | Online Access |
| description | Aim Longevity is an important life-history trait, directly linked to the core attributes of fitness (reproduction and survival), yet large-scale comparative studies quantifying its implications for the ecology and life history of ectotherms are scarce. We tested the allometry of longevity in squamates and the tuatara, and
determined how longevity is related to key environmental characteristics and lifehistory traits. Predictions based on life-history theory are expected to hold true for
ectotherms, similarly to mammals and birds. Location World-wide. Methods We assembled from the literature a dataset of the maximum longevities of more than a thousand squamate species, representing c. 10% of their known species diversity, their phylogenetic relationships and multiple life-history and ecological variables. Correcting for phylogeny, we modelled the link between
squamate longevity and both key life-history traits, such as body mass and age at first reproduction, and important environmental factors, such as latitude and primary productivity within species distributional ranges.
Results Large-bodied species live for longer than small ones, but body size explains far less of the variance in longevity than it does in mammals and birds. Accounting for body size, squamate brood frequency is negatively correlated with longevity, while age at first reproduction is positively correlated with longevity. This points to a continuum of slow-to-fast life-history strategies. Squamates in high latitudes and cold regions live for longer, probably because a shorter season of
activity translates to slower development, older age at first reproduction and hence to increased longevity. Individuals live longer in captivity than in the wild. Herbivorous and omnivorous squamates live for longer than carnivorous ones. We postulate that low-quality nutrition reduces growth rates, promotes a relative decline in reproductive rates and thus prolongs life. Main conclusions Our results support key predictions from life-history theory and suggest that reproducing more slowly and at older ages, being herbivorous and,
plausibly, lowering metabolism, result in increased longevity. |
| first_indexed | 2025-11-15T06:30:09Z |
| format | Article |
| id | unimas-10697 |
| institution | Universiti Malaysia Sarawak |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T06:30:09Z |
| publishDate | 2015 |
| publisher | John Wiley & Sons, Ltd. |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | unimas-106972022-01-26T07:36:27Z http://ir.unimas.my/id/eprint/10697/ Late bloomers and baby boomers: ecological drivers of longevity in squamates and the tuatara Das, I. QL Zoology Aim Longevity is an important life-history trait, directly linked to the core attributes of fitness (reproduction and survival), yet large-scale comparative studies quantifying its implications for the ecology and life history of ectotherms are scarce. We tested the allometry of longevity in squamates and the tuatara, and determined how longevity is related to key environmental characteristics and lifehistory traits. Predictions based on life-history theory are expected to hold true for ectotherms, similarly to mammals and birds. Location World-wide. Methods We assembled from the literature a dataset of the maximum longevities of more than a thousand squamate species, representing c. 10% of their known species diversity, their phylogenetic relationships and multiple life-history and ecological variables. Correcting for phylogeny, we modelled the link between squamate longevity and both key life-history traits, such as body mass and age at first reproduction, and important environmental factors, such as latitude and primary productivity within species distributional ranges. Results Large-bodied species live for longer than small ones, but body size explains far less of the variance in longevity than it does in mammals and birds. Accounting for body size, squamate brood frequency is negatively correlated with longevity, while age at first reproduction is positively correlated with longevity. This points to a continuum of slow-to-fast life-history strategies. Squamates in high latitudes and cold regions live for longer, probably because a shorter season of activity translates to slower development, older age at first reproduction and hence to increased longevity. Individuals live longer in captivity than in the wild. Herbivorous and omnivorous squamates live for longer than carnivorous ones. We postulate that low-quality nutrition reduces growth rates, promotes a relative decline in reproductive rates and thus prolongs life. Main conclusions Our results support key predictions from life-history theory and suggest that reproducing more slowly and at older ages, being herbivorous and, plausibly, lowering metabolism, result in increased longevity. John Wiley & Sons, Ltd. 2015 Article PeerReviewed text en http://ir.unimas.my/id/eprint/10697/1/Late%20bloomers.pdf Das, I. (2015) Late bloomers and baby boomers: ecological drivers of longevity in squamates and the tuatara. Global Ecology and Biogeography, 24 (4). pp. 396-405. ISSN 1466-8238 http://onlinelibrary.wiley.com/doi/10.1111/geb.12244/abstract DOI: 10.1111/geb.12244 |
| spellingShingle | QL Zoology Das, I. Late bloomers and baby boomers: ecological drivers of longevity in squamates and the tuatara |
| title | Late bloomers and baby boomers: ecological drivers of longevity in squamates and the tuatara |
| title_full | Late bloomers and baby boomers: ecological drivers of longevity in squamates and the tuatara |
| title_fullStr | Late bloomers and baby boomers: ecological drivers of longevity in squamates and the tuatara |
| title_full_unstemmed | Late bloomers and baby boomers: ecological drivers of longevity in squamates and the tuatara |
| title_short | Late bloomers and baby boomers: ecological drivers of longevity in squamates and the tuatara |
| title_sort | late bloomers and baby boomers: ecological drivers of longevity in squamates and the tuatara |
| topic | QL Zoology |
| url | http://ir.unimas.my/id/eprint/10697/ http://ir.unimas.my/id/eprint/10697/ http://ir.unimas.my/id/eprint/10697/ http://ir.unimas.my/id/eprint/10697/1/Late%20bloomers.pdf |