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月光及光照强度对艾虎微生境利用的影响

魏万红 周文扬 樊乃昌   

  1. 中国科学院西北高原生物研究所
  • 出版日期:2005-06-25 发布日期:2008-07-07

THE INFLUENCE OF MOONLIGHT AND SIMULATINGLIGHT INTENSITY ON THE USE OF MICROHABITAT BY POLECATS ( MUSTELA EVERSMANNI)

WEI Wanhong ZHOU Wenyang FAN Naichang   

  • Online:2005-06-25 Published:2008-07-07

摘要: 月光及光照作为一种捕食风险对许多动物的微生境利用有明显的影响。野外的无线电遥测资料和室内模拟光照强度的研究表明, 艾虎在明亮的月光期明显增加了对平坦灌丛区域的利用时间, 灌丛作为一种隐蔽场所减少了艾虎被捕食的风险, 艾虎在明亮的月光期增加对灌丛的利用是一种反捕食策略。无论光照强度如何, 艾虎对有隐蔽洞道区域的利用程度较高,在无隐蔽物区域采用短时间的活动方式, 在有隐蔽物区域采用长时间活动方式。这表明艾虎在进化过程中形成了反捕食策略, 而不是躲避捕食的策略。

关键词: 艾虎, 月光, 微生境

Abstract: The moonlight especially its light intensity is one of predation risks that obviously influenced many animals in using their microhabitats. The radio-tracking in the field and very low light intensities (0.01 to 1.30μE/ m2s - 1) simulated moonlight in the laboratory were used to study their influences on the use of microhabitats by polecats. Our results showed that the polecats increased the usage of the shrub area with more food. They used shrubs as the shelters to reduce their predation risks. They increased the usage of the shrub areas under bright moonlight was one of the anti-predators strategies1 Regardless of the simulated moonlight intensity used , the polecats mainly utilized the area with more burrows for longer period , and used the areas without burrows for shorter period. These results indicated that polecats have formed a strategy to become anti-predators and not the avoidance-predators during their evolutionary process.

Key words: Polecat (Mustela eversmanni), Moonlight, Microhabitat