學術資源整合系統-相關推薦
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| 作者 | Lin, Jhan-Wei;Liao, Chen-Pan;Lin, Yen-Po;Cheng, Ren-Chung;Huang, Wen-San |
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| 出版日期 | 202312 |
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| 著作名稱 | Island syndrome deviations in green-spotted grass lizards on Guishan Island
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| 會議名稱 | British Ecological Society Annual Meeting 2023 |
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| 會議地點 | Belfast, UK |
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| 主辦單位 | British Ecological Society |
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| 國際性會議 | Y |
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| 關鍵字 | Gigantism, Ornament evolution, Foster's rule, Microevolution, Intraspecific competition, Capture-mark-recapture |
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| 摘要 | Island syndrome predicts that insular animals tend to increase in size, reduce aggressiveness, display less conspicuous ornamentation, diminish sexual dimorphism, and adopt a more K-strategical life history. However, our study of the green-spotted grass lizard (Takydromus viridipunctatus) population on Guishan Island, a 7,000-year-old small island northeast of Taiwan, reveals a unique departure from these predictions. We found that the body sizes of adults and neonates on the island are indeed enlarged, with over 20% of insular adults surpassing the maximum size observed in Taiwan. The insular newborns were also 15% larger and 50% heavier. Morphological differences between the sexes are also smaller on the island than in Taiwan. Additionally, the demography shows more overlap between generations on the island, in contrast to the distinct two generation pattern of this r-strategical species in Taiwan. However, insular individuals have significantly higher rates of injury and toe loss than Taiwanese populations, indicating heightened aggressiveness on this island. Furthermore, both sexes on the island, including females, display greener, more saturated, and larger ornaments, in contrast to the distinct sexual dichromatism observed in Taiwan where only males display green spots. Our findings unveil a significant insular shift in morphology, ornamentation, sexual dimorphism, behavior, and life history of the green-spotted grass lizard on this young island. While certain aspects align with island syndrome predictions, others starkly contrast them. Future research will focus on confirming the heritability of these traits, assessing genetic differentiation among populations, and quantifying the ecological environment to further understand the proximate and ultimate causes of this unique phenotypic changes. |
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| 系統號 | NO000006901 |
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