[1].Effect of Morphology and Age on the Closure Ability of Asian Box Turtles (Cuora)[J].Asian Herpetological Research,2022,13(3):159-167.[doi:10.16373/j.cnki.ahr.210048]
 Fanrong XIAO#,Zhen HONG # and Haitao SHI*.Effect of Morphology and Age on the Closure Ability of Asian Box Turtles (Cuora)[J].Asian Herpetological Research(AHR),2022,13(3):159-167.[doi:10.16373/j.cnki.ahr.210048]

Effect of Morphology and Age on the Closure Ability of Asian Box Turtles (Cuora)()

Asian Herpetological Research[ISSN:2095-0357/CN:51-1735/Q]



Effect of Morphology and Age on the Closure Ability of Asian Box Turtles (Cuora)
Fanrong XIAO1# Zhen HONG12 # and Haitao SHI1*
1 Ministry of Education Key Laboratory for Ecology of Tropical Islands, Key Laboratory of Tropical Animal and Plant Ecology of Hainan Province, College of Life Sciences, Hainan Normal University, Haikou 571158, Hainan, China
2 College of Agriculture and Rural Affairs, Hainan Open University, Haikou 570208, Hainan, China
anterior plastron lobe length closing force closing time Geoemydidae shell kinesis
The ability of box turtles to close their shell as an antipredation adaptation and the potential impact of the anterior and posterior lobes of the plastron on the closing force and closing time remain relatively unexplored. Here, keeled (Cuora mouhotii) and flowerback (C. galbinifrons) box turtles, whose shell cannot and can be completely closed, respectively, were studied. Anterior and posterior closing forces were measured using a force transducer, and the closing time was recorded. The anterior closing force in both turtle species was substantially greater than the posterior closing force, reaching approximately 4-fold in adults. Moreover, the anterior closing time in adults was significantly longer than the posterior closing time. This closing force difference can be attributed to the substantially smaller anterior plastron lobe than the posterior lobe in the two species. Additionally, the anterior and posterior closing forces in both species positively correlated with body weight and showed no relationship with the length of the bridge and hinge. Interspecies comparison showed that the anterior and posterior closing forces were significantly greater (approximately 2–4-fold) in flowerback box turtle than in keeled box turtles, regardless of age, and the closure time was significantly longer in adult flowerback box turtles than in adult keeled box turtles. Although the closing forces in both species showed negative allometry, the increase rate was significantly higher in flowerback box turtle than in keeled box turtle. The closing forces in both species were observed to be approximately 4-fold stronger in adults than in juveniles. No sexual dimorphism concerning the anterior and posterior closing forces was observed in either species. In summary, this is the first study to comparatively uate the anterior and posterior closing ability of box turtles, demonstrating that age, weight, plastron shape, and the degree of shell closure are important factors affecting closing ability.


Abdala V., Manzano A. S., Herrel A. 2008. The distal forelimb musculature in aquatic and terrestrial turtles: Phylogeny or environmental constraints? J Anat, 213: 159–172
Bramble D. M. 1974. Emydid shell kinesis: biomechanics and evolution. Copeia, 707–727
Bramble D. M., Hutchison J. H. 1981. A reuation of plastral kinesis in African turtles of the genus Pelusios. Herpetologica, 37: 205–212
Cordero G. A., Liu H., Wimalanathan K., Weber R., Quinteros K., Janzen F. J. 2018a. Gene network variation and alternative paths to convergent evolution in turtles. Evol Dev, 20: 172–185
Cordero G. A., Quinteros K., Janzen F. J. 2018b. Delayed trait development and the convergent evolution of shell kinesis in turtles. Proc R Soc B, 285: 20181585
Cordero G. A., Stearns S., Quinteros K., Berns C. M., Binz S. M., Janzen F. 2019. The postembryonic transformation of the shell in emydine box turtles. Evol Dev, 2019: e12307
Dodd C. K. 2001. North American box turtles: A natural history. Norman: University of Oklahoma Press
Feldman C. R., Parham J. F. 2002. Molecular phylogenetics of emydine turtles: Taxonomic revision and the evolution of shell kinesis. Mol Phylogenet Evol, 22: 388–398
Johnson S. M., Creighton R. J. 2005. Spinal cord injury-induced changes in breathing are not due to supraspinal plasticity in turtles (Pseudamys scripta). Amer J Physiol, 289: 1550–1559
Kardong K. V. 2015. Vertebrates Comparative Anatomy, Function, Evolution, 7th Ed. New York: McGraw-Hill Education
Müller W. 1975. A method for the comparison of morphometrical data on skeletal muscles in young rats of different ages and body weight. Histochemistry, 43: 241–248
Preston V. L., Vannatta J. M., Klukowski M. 2020. Behavioural and physiological responses to simulated predator-induced stress in the eastern box turtle, Terrapene carolina carolina. Amphibia-Reptilia, 41: 387–398
Pritchard P. C. H. 2008. Evolution and structure of the turtle shell. In Wyneken J., Godfrey M. H., Bels V. (Eds.), Biology of turtles. Boca Raton, FL: CRC Press
Randall D., Burggren W., French K. 2001 Eckert Animal Physiology: Mechanisms and Adaptations, 5th Ed. New York: W. H. Freeman and Company
Rhodin A. G., Iverson J. B., Bour R., Fritz U., Georges A., Shaffer H. B., Van Dijk P. P. 2017. Turtles of the World: Annotated Checklist and Atlas of Taxonomy, Synonomy, Distribution, and Conservation Status (8th Ed.). Chelonian Research Monographs, 7: 1–292
Schmidt-Nielsen K. 1993. Scaling: why is animal size so important? Cambridge: Cambridge University Press
Schwartz N. B. 1953. Relationship between body weight and gastrocnemius-soleus muscle weight in growing rats. Growth, 17: 123–126
Shi H. T., Zhao E., Wang L. J. 2011. The Amphibian and Reptilian Fauna of Hainan. Beijing: Science Press
Stuart B. L, Parham J.F. 2004. Molecular phylogeny of the critically endangered Indochinese box turtle (Cuora galbinifrons). Mol Phylogenet Evol, 31: 164–177
Xiao F. R., Hong Z., Wang J. C., Butterfield T., Shi H. T. 2020. The relationship between shell morphology and crevice size affecting retreat selection of the keeled box turtle (Cuora mouhotii). Asian Herpetol Res, 11: 342–349
Xiao F. R., Wang J. C., Shi H. T., Long Z. Z., Lin L., Wang W. 2017. Ecomorphological correlates of microhabitat selection in two sympatric Asian box turtle species (Geoemydidae: Cuora). Can J Zool, 95: 753–758
Zar J. H. 1996. Biostatistical analysis, 3rd ed. Upper Saddle River, NJ: Prentice Hall

更新日期/Last Update: 2022-09-25