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Zoological Research
Kunming Institute of Zoology, Chinese Academy of Sciences
ISSN: 2095-8137
Vol. 28, No. 1, 2007, pp. 28-34
Bioline Code: zr07005
Full paper language: Chinese
Document type: Research Article
Document available free of charge

Zoological Research, Vol. 28, No. 1, 2007, pp. 28-34

 en Comparison of Food Components Between Rana pleuraden check for this species in other resources and Rana chaochiaoensis check for this species in other resources from Kunming and Evaluation of Their Benefit and Harm
ZHOU Wei, PAN Xiao-fu, OU Xiao-hong, ZHANG Qing

Abstract

Food components of 1 105 individuals of Rana pleuraden check for this species in other resources and 428 Rana chaochiaoensis check for this species in other resources collected from Bailongsi, Huahongdong and Xijiekou of Kunming from May 1998 to November 2003 were analyzed by dissecting their stomachs. It was calculated that percentage of number and frequency, a diversity index, index of percent similarity, width of trophic ecological niche, overlap of trophic ecological niche and beneficial coefficient of the two frog species. According to results, major food components of different populations of R. pleuraden collected from different localities as well between R. pleuraden and R. chaochiaoensis were basically identical. However, there were differentiation in food diversity and trophic ecological niche between R. pleuraden and R. chaochiaoensis as well between their males and females. The annual beneficial coefficients of both R. pleuraden and R. chaochiaoensis were positive, which implied that their benefit for mankind was larger than harm. The beneficial level of R. pleuraden was higher than one of R. chaochiaoensis. The study results showed that beneficial coefficient could be changed among populations of a species collected from different regions and/or the same population collected from different seasons or years, which meant that the beneficial coefficient could not be compared. This coefficient only expressed the level of benefit and harm for mankind in the certain period.

Keywords
Rana pleuraden; Rana chaochiaoensis; Analysis of food components; Food diversity; Trophic ecological niche; Evaluation of benefit and harm

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

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