Biodiv Sci ›› 2020, Vol. 28 ›› Issue (4): 412-421.DOI: 10.17520/biods.2019090

• Special Feature: Altay Animal Diversity • Previous Articles     Next Articles

The relationship between body condition index and ecological factors in two Phrynocephalus species in the piedmont desert of Altai Mountains

Xiaqiu Tao1,2,3,Zhigang Jiang1,4,Shengnan Ji5,Hongjun Chu6,Na Li1,4,Daode Yang3,*(),Chunwang Li1,4,*()   

  1. 1 CAS Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101
    2 Jiangsu Key Laboratory for Biodiversity and Biotechnology, College of Life Sciences, Nanjing Normal University, Nanjing 210023
    3 Wildlife Protection Research Institute, Central South University of Forestry and Technology, Changsha 410004
    4 University of Chinese Academy of Sciences, Beijing 100049
    5 Biodiversity Research Center, Chinese Research Academy of Environmental Sciences, Beijing 100012
    6 Altay Management Station of Mt. Kalamaili Ungulate Nature Reserve, Altay, Xinjiang 836500
  • Received:2019-08-26 Accepted:2019-11-12 Online:2020-04-20 Published:2020-06-15
  • Contact: Daode Yang,Chunwang Li

Abstract:

We investigated the age-related and sexual characteristics in Phrynocephalus helioscopus and P. grumgrzimailoi using the body condition index and its relationship to annual mean temperature, annual precipitation, altitude, and mean diurnal range. We collected body measurement data for 176 individuals of P. helioscopus and 84 individuals of P. grumgrzimailoi. The body condition index is comprised of the ratio of log body mass to log snout-vent length. There were significant differences of the body condition index between P. helioscopus and P. grumgrzimailoi. In P. grumgrzimailoi, body condition indices between the sexes were significantly different but were not in P. helioscopus. Differences between sub-adults and adults were significant in both species. Body condition index of P. grumgrzimailoi differed significantly through time but remained unchanged in P. helioscopus. Annual mean temperature is a significant predictor for body condition index of P. grumgrzimailoi and interacts with annual precipitation in our models. Meanwhile, altitude had significant effects on body condition index in P. helioscopus. These results suggest that these two species respond differently to various environmental factors, and their adaptability to different environmental conditions are not the same.

Key words: Altai Mountains, Phrynocephalus, body condition index, ecological factors