{"title":"夜间活动能延长壁虎的寿命吗?","authors":"Gavin Stark, Rachel Schwarz, Shai Meiri","doi":"10.1163/22244662-20191074","DOIUrl":null,"url":null,"abstract":"The majority of lizard clades are ancestrally and predominantly diurnal.\nThe only major taxon in which most species are nocturnal is the Gekkota (geckos\nand pygopodids). As ectothermic thermoregulators, lizard metabolic rates are\nhighly temperature dependent, and diurnal lizards therefore demonstrate higher metabolic\nrates than nocturnal ones. Furthermore, exposure to solar radiation is thought\nto reduce ectothermic longevity by increasing both metabolic costs and the rate of\naccumulating harmful mutations through UV radiation (UVC specifically). In being nocturnal, ectothermic species may reduce their intrinsic mortality rates and thus\nlive longer. To test this hypothesis, we collected literature data on the maximum longevities of 740 lizard\nspecies, of which 185 are geckos. We examined whether geckos live longer than\nother lizards, and whether activity time affects gecko longevity. While geckos\nlive relatively long for lizards of their size, their activity time was found to be unrelated to\nlongevity, contradicting our predictions. We suggest that diurnal\nspecies may have evolved higher resistance to UV radiation via thicker, more\nkeratinized skin. Elevated metabolic rates do not automatically equate with\nfaster aging. Mortality through extrinsic causes (e.g., predation) may impose\nmuch stronger selective pressures than intrinsic causes.","PeriodicalId":50267,"journal":{"name":"Israel Journal of Ecology & Evolution","volume":"-1 1","pages":"1-8"},"PeriodicalIF":1.3000,"publicationDate":"2020-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1163/22244662-20191074","citationCount":"4","resultStr":"{\"title\":\"Does nocturnal activity prolong gecko longevity?\",\"authors\":\"Gavin Stark, Rachel Schwarz, Shai Meiri\",\"doi\":\"10.1163/22244662-20191074\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The majority of lizard clades are ancestrally and predominantly diurnal.\\nThe only major taxon in which most species are nocturnal is the Gekkota (geckos\\nand pygopodids). As ectothermic thermoregulators, lizard metabolic rates are\\nhighly temperature dependent, and diurnal lizards therefore demonstrate higher metabolic\\nrates than nocturnal ones. Furthermore, exposure to solar radiation is thought\\nto reduce ectothermic longevity by increasing both metabolic costs and the rate of\\naccumulating harmful mutations through UV radiation (UVC specifically). In being nocturnal, ectothermic species may reduce their intrinsic mortality rates and thus\\nlive longer. To test this hypothesis, we collected literature data on the maximum longevities of 740 lizard\\nspecies, of which 185 are geckos. We examined whether geckos live longer than\\nother lizards, and whether activity time affects gecko longevity. While geckos\\nlive relatively long for lizards of their size, their activity time was found to be unrelated to\\nlongevity, contradicting our predictions. We suggest that diurnal\\nspecies may have evolved higher resistance to UV radiation via thicker, more\\nkeratinized skin. Elevated metabolic rates do not automatically equate with\\nfaster aging. Mortality through extrinsic causes (e.g., predation) may impose\\nmuch stronger selective pressures than intrinsic causes.\",\"PeriodicalId\":50267,\"journal\":{\"name\":\"Israel Journal of Ecology & Evolution\",\"volume\":\"-1 1\",\"pages\":\"1-8\"},\"PeriodicalIF\":1.3000,\"publicationDate\":\"2020-03-03\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1163/22244662-20191074\",\"citationCount\":\"4\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Israel Journal of Ecology & Evolution\",\"FirstCategoryId\":\"93\",\"ListUrlMain\":\"https://doi.org/10.1163/22244662-20191074\",\"RegionNum\":4,\"RegionCategory\":\"环境科学与生态学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"ECOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Israel Journal of Ecology & Evolution","FirstCategoryId":"93","ListUrlMain":"https://doi.org/10.1163/22244662-20191074","RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ECOLOGY","Score":null,"Total":0}
The majority of lizard clades are ancestrally and predominantly diurnal.
The only major taxon in which most species are nocturnal is the Gekkota (geckos
and pygopodids). As ectothermic thermoregulators, lizard metabolic rates are
highly temperature dependent, and diurnal lizards therefore demonstrate higher metabolic
rates than nocturnal ones. Furthermore, exposure to solar radiation is thought
to reduce ectothermic longevity by increasing both metabolic costs and the rate of
accumulating harmful mutations through UV radiation (UVC specifically). In being nocturnal, ectothermic species may reduce their intrinsic mortality rates and thus
live longer. To test this hypothesis, we collected literature data on the maximum longevities of 740 lizard
species, of which 185 are geckos. We examined whether geckos live longer than
other lizards, and whether activity time affects gecko longevity. While geckos
live relatively long for lizards of their size, their activity time was found to be unrelated to
longevity, contradicting our predictions. We suggest that diurnal
species may have evolved higher resistance to UV radiation via thicker, more
keratinized skin. Elevated metabolic rates do not automatically equate with
faster aging. Mortality through extrinsic causes (e.g., predation) may impose
much stronger selective pressures than intrinsic causes.
期刊介绍:
The Israel Journal of Ecology and Evolution includes high-quality original research and review papers that advance our knowledge and understanding of the function, diversity, abundance, distribution, and evolution of organisms. We give equal consideration to all submissions regardless of geography.