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标题：Sex-specific growth arrest in a lizard
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作者：Lukáš Kubička ; Adam Tureček ; Tomáš Kučera 等
期刊名称：iScience
印刷版ISSN：2589-0042
出版年度：2022
卷号：25
期号：4
页码：1-13
DOI：10.1016/j.isci.2022.104041
语种：English
出版社：Elsevier
摘要：Summary(1) In contrast to mammals and birds, reptiles have been considered as indeterminate growers, whose growth reflects differential allocation of resources to growth versus other energetically demanding processes such as reproduction. (2) We monitored the growth and activity of bone growth plates, hormonal profiles, and reproductive activity in males and females of the male-larger geckoParoedura picta. We show that growth plates fuse in this species in a sex-specific manner. The more abrupt epiphyseal closure and more pronounced growth deceleration in females coincide with the increased activity of their reproductive organs. (3) We conclude that at least some lizards are determinate growers whose sexual size dimorphism is potentially driven by ovarian hormones. The major difference in growth between endothermic and ectothermic amniotes appears to be in the magnitude of growth before and after the first reproduction, not in the mechanistic processes such as senescence of growth plate cellsGraphical abstractDisplay OmittedHighlights•We monitored activity of bone growth plates in a male-larger gecko•Growth plates fused in a sex-specific manner•At least some lizards are determinate growers•Their sexual size dimorphism seems to be driven by ovarian hormonesZoology; Ichthyology; Evolutionary biology; Evolutionary developmental biology