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Variations in home range of Callosciurus erythraeus during different breeding periods |
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Abstract Studies of home range during the breeding season are important to understanding animal community relations, population dynamics,and reproductive strategies. We carried out research on variations in home range of Red-bellied squirrels (Callosciurus erythraeus)in a planted forest during March-December 2009,March-September 2010 in Hongya County,Sichuan Province. We employed the minimum convex polygon (MCP)method. The results indicated that:(1) The average size of male home ranges was 1.34 ± 0.34 hm2 ,which was significantly larger than the size of female home ranges (0.60 ± 0.08 hm2 )throughout the breeding season; (2)In the estrous period,male squirrels expanded their home ranges,possibly to increase female encounter rate,and thus increase mating numbers. However,the female home ranges remained steady and decreased significantly during pregnancy and the offspring raising period,which could be explained by the females’trade-off between energy intake and predation risk to increase the survival rate of offspring;(3) Throughout the breeding season,the home ranges overlapped between males,but not between females. The overlap of home ranges between males and females could only be detected in the estrous period,indicating that females showed strong territoriality in the breeding season.
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