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Development of sexual dimorphism in two sympatric skinks with different growth rates
Yang, Chen1,2; Zhao, Jinming3; Diaz, Raul E.4; Lyu, Nan5
Corresponding AuthorLyu, Nan(nanlyu@bnu.edu.cn)
2019-07-01
Source PublicationECOLOGY AND EVOLUTION
ISSN2045-7758
Volume9Issue:13Pages:7752-7760
AbstractSexual size dimorphism (SSD) is widespread in animals, especially in lizards (Reptilia: Squamata), and is driven by fecundity selection, male-male competition, or other adaptive hypotheses. However, these selective pressures may vary through different life history periods; thus, it is essential to assess the relationship between growth and SSD. In this study, we tracked SSD dynamics between a "fading-tail color skink" (blue tail skink whose tail is only blue during its juvenile stage: Plestiodon elegans) and a "nonfade color" tail skink (retains a blue tail throughout life: Plestiodon quadrilineatus) under a controlled experimental environment. We fitted growth curves of morphological traits (body mass, SVL, and TL) using three growth models (Logistic, Gompertz, and von Bertalanffy). We found that both skinks have male-biased SSD as adults. Body mass has a higher goodness of fit (as represented by very high R-2 values) using the von Bertalanffy model than the other two models. In contrast, SVL and TL for both skinks had higher goodness of fit when using the Gompertz model. Two lizards displayed divergent life history tactics: P. elegans grows faster, matures earlier (at 65 weeks), and presents an allometric growth rate, whereas P. quadrilineatus grows slower, matures later (at 106 weeks), and presents an isometric growth rate. Our findings imply that species- and sex-specific trade-offs in the allocation of energy to growth and reproduction may cause the growth patterns to diverge, ultimately resulting in the dissimilar patterns of SSD.
Keywordgrowth curves model sexual size dimorphism skink sympatric trade-offs
DOI10.1002/ece3.5358
Indexed BySCI
WOS KeywordSIZE DIMORPHISM ; BODY-SIZE ; GEOGRAPHIC-VARIATION ; IGUANID LIZARD ; LIFE-HISTORY ; BLUE TAILS ; AGE ; POPULATION ; EVOLUTION ; SELECTION
Language英语
Funding ProjectNational Natural Science Foundation of China[31500316] ; National Natural Science Foundation of China[31672298]
WOS Research AreaEnvironmental Sciences & Ecology ; Evolutionary Biology
WOS SubjectEcology ; Evolutionary Biology
WOS IDWOS:000476593800028
Funding OrganizationNational Natural Science Foundation of China
PublisherWILEY
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/26839
Collection中国科学院水利部成都山地灾害与环境研究所
Corresponding AuthorLyu, Nan
Affiliation1.Chinese Acad Sci, Chengdu Inst Biol, Chengdu, Sichuan, Peoples R China
2.China West Normal Univ, Minist Educ, Key Lab Southwest China Wildlife Resources Conse, Nanchong, Peoples R China
3.Anhui Univ, Sch Resources & Environm Engn, Hefei, Anhui, Peoples R China
4.Southeastern Louisiana Univ, Dept Biol Sci, Hammond, LA 70402 USA
5.Beijing Normal Univ, Coll Life Sci, Key Lab Biodivers & Ecol Engn, Minist Educ, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Yang, Chen,Zhao, Jinming,Diaz, Raul E.,et al. Development of sexual dimorphism in two sympatric skinks with different growth rates[J]. ECOLOGY AND EVOLUTION,2019,9(13):7752-7760.
APA Yang, Chen,Zhao, Jinming,Diaz, Raul E.,&Lyu, Nan.(2019).Development of sexual dimorphism in two sympatric skinks with different growth rates.ECOLOGY AND EVOLUTION,9(13),7752-7760.
MLA Yang, Chen,et al."Development of sexual dimorphism in two sympatric skinks with different growth rates".ECOLOGY AND EVOLUTION 9.13(2019):7752-7760.
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