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Zoological Research
Kunming Institute of Zoology, Chinese Academy of Sciences
ISSN: 2095-8137
Vol. 28, No. 1, 2007, pp. 41-46
Bioline Code: zr07007
Full paper language: English
Document type: Research Article
Document available free of charge

Zoological Research, Vol. 28, No. 1, 2007, pp. 41-46

 en Competitive Strategies of Two Species of Co-occuring Tadpoles
ZHANG Jin-dong, XIONG Ye, FU Zhi-ping, LI Yu-jie, DAI Qiang, WANG Yue-zhao

Abstract

We examined the competitive ability of larval toads ( Bufo gargarizans check for this species in other resources ) and frogs ( Rana kukunoris check for this species in other resources ) which co-occur in natural pools in the Jiuzhaigou Nature Reserve. We measured the activity level, growth rate, mass at metamorphosis and larval period in a laboratory experiment. Tadpoles of B. gargarizans were significantly more active when food was abundant than scarce, while there was no significant difference in the activity of R. kukunoris tadpoles at different food levels. At low food availability, mass at metamorphosis and growth rate of R. kukunoris were significantly increased in the presence of B. gargarizans, whereas the presence of R. kukunoris had no significant effect on the mass and growth rate of B. gargarizans. In all treatments, the larval period of B. gargarizans at low food availability was the shortest. These results suggest that B. gargarizans can adapt to different food levels by changing their activity rate. At high food level, B. gargarizans increased activity to gain more food. At low food level, B. gargarizans decreased activity and achieved early metamorphosis. However, when food resources were limited, R. kukunoris could gain more food than B. gargarizans.

Keywords
Activity level; Mass at metamorphosis; Bufo gargarizans; Rana kukunoris; Interspecific competition

 
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Alternative site location: http://www.zoores.ac.cn/

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