Chunlan MAI,Jianping YU and Wenbo LIAO.Ecological and Geographical Reasons for the Variation of Digestive Tract Length in Anurans[J].Asian Herpetological Research(AHR),2019,10(4):246-252.[doi:10.16373/j.cnki.ahr.190037]
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Ecological and Geographical Reasons for the Variation of Digestive Tract Length in Anurans
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Asian Herpetological Research[ISSN:2095-0357/CN:51-1735/Q]

2019 VoI.10 No.4
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Ecological and Geographical Reasons for the Variation of Digestive Tract Length in Anurans
Chunlan MAI1# Jianping YU1# and Wenbo LIAO123*
1 Key Laboratory of Southwest China Wildlife Resources Conservation (Ministry of Education), China West Normal University, Nanchong 637009, Sichuan, China
2 Key Laboratory of Artificial Propagation and Utilization in Anurans of Nanchong City, China West Normal University, Nanchong 637009, Sichuan, China
3 Institute of Eco-adaptation in Amphibians and Reptiles, China West Normal University, Nanchong 637009, Sichuan, China
Anurans digestive tract length environmental change ecological type
Changes of environmental conditions can shape organs size evolution in animal kingdoms. In particular, environmental changes lead to difference in food resources between different habitats, thereby affecting individual’s energy intake and allocation. The digestive theory states that animals consuming food with low contents of digestible materials should result in increasing gut length. In this study, to test the hypothesis of digestive theory, we studied ecological and geographical reasons for variation in digestive tract length among 35 species of anurans distributing in different altitude and latitude. The results showed that ecological type significantly affected digestive tract length among species, with aquatic and terrestrial species having longer digestive tract than arboreal ones. Latitude was positively correlated with digestive tract length. However, altitude, as well as monthly mean temperature and precipitation, did not correlate with digestive tract length among species. Our findings suggest that aquatic and terrestrial species might forage less digestible materials than arboreal species, thereby displaying relatively longer digestive tract than arboreal species.


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Last Update: 2019-12-25