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Zoological Research
Kunming Institute of Zoology, Chinese Academy of Sciences
ISSN: 2095-8137
Vol. 30, No. 5, 2009, pp. 545-552
Bioline Code: zr09084
Full paper language: Chinese
Document type: Research Article
Document available free of charge

Zoological Research, Vol. 30, No. 5, 2009, pp. 545-552

 en Preliminary Study on Relative Fatness of Niviventer confucianus check for this species in other resources on Islands of Qiandao Lake Region
Sun, Bo; Bao, Yi-xin; Zhang, Long-long; Zhao, Qing-yang & Hu, Zhi-yuan


Relative fatness is an important general indicator of physiological body condition in small mammals and reflects their adaptive ability to the environment. In May 2008, we surveyed part islands in Qiandao Lake about the number of populations of small mammals through the night trapping method, anatomizing and measuring the dominant species Niviventer confucianus check for this species in other resources captured during the search, calculating the index of relative fatness K, (K=100W/L3), where L indicated the body length, and W was the carcass body weight; Meanwhile we investigates the relationship between the relative fatness and the changing characteristics in sex, age, habitat types and other factors under islanding conditions. Results indicated that islanding affected the N. confucianus fatness between the sexes and the extent of their differences ranged from significant level (large islands, P=0.015) to no significance (small and medium islands, P=0.063 and 0.288); among age groups, only a few adjacent age groups had significant difference (large: ♂; I and II, P=0.042;media: ♀ and ♂ all II and III, P=0.013 and 0.044) or very significantly (large: ♀, III and IV, P=0.000), the others failed to meet the significant level (P>0.05). The changes of N. confucianus fatness among age groups were mostly related to the changes of its own physiological characteristics; Isolated island resulted in significant difference in different types of dominant species and abundance, thus affecting the difference of fatness; There was significant difference (P=0.000) between different sizes islands and had significant positive correlation between them (Pearson test,r=0.561,P=0.037). In a word, in addition to sex and age, the islands area, habitat and population pressure all have a direct or indirect relationship with the difference of fatness in Qiandao Lake, which also reflects the adaptability of N. confucianus to islanding environment.

Niviventer confucianus; Relative fatness; Habitat fragmentation; Island of Qiandao Lake

© Copyright 2009 Kunming Institute of Zoology, the Chinese Academy of Sciences
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