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快速变色是动物对纷繁复杂的自然界高度适应的策略之一。爬行动物中部分有鳞目动物将快速变色表现得淋漓尽致。主要介绍爬行动物快速变色在伪装、通讯和体温调节方面的作用,阐述其中的变色机理。爬行类等动物快速变色在生理体色变化方面由神经系统调节为主而产生生物色和结构色方面的变化。快速变色这种适应策略可能由伪装方面的自然选择、通讯方面的自然选择或性选择进化而来,也可能受体温调节需求的影响,还可能是由这三者同时产生的选择压力进化而来。 相似文献
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跑台在实验动物研究中的应用越来越多,主要集中在建立运动模型以及探究运动对生理和病理的作用,以促进运动训练的科学化、竞技体育成绩的提高、运动疗法在疾病康复中合理有效的应用等,同时也是研究运动与代谢,运动与心脑血管病等的研究工具。本文对动物跑台的基本构造、使用方法和研究进展进行了分析和总结,为利用跑台进行研究提供一定的参考。 相似文献
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温度和热驯化对胡氏大生熊虫运动行为的影响 总被引:1,自引:0,他引:1
对外温脊椎动物体温和运动能力关系的研究表明,外温动物的运动行为对身体温度的变化高度敏感(Bennett,1990)。在许多动物种类中,体温的升高或降低显著影响动物的运动能力(Huey,1982;Miller,1982;Watkins,2000),而运动能力的下降则影响外温动物逃避捕食者(Christian andTracy,19 相似文献
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根号 《小哥白尼(野生动物画报)》2011,(4)
美味的食物就在眼前,但是怎么也得不到,怎么办?对于不少动物而言,解决这个问题的方法很简单,一个字——偷!为了生存,它们形成了五花八门的偷窃风格。伪装性格型有的动物平时看上去憨厚又可爱,你甚至想象不到,它们也是动物窃贼集团的成员。它们的行动口号是:填饱了肚子,我才会变温柔。 相似文献
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In experiments on Black Sea skates (Raja clavata), the potential of the receptor epithelium of the ampullae of Lorenzini and spike activity of single nerve fibers connected to them were investigated during electrical and temperature stimulation. Usually the potential within the canal was between 0 and –2 mV, and the input resistance of the ampulla 250–400 k. Heating of the region of the receptor epithelium was accompanied by a negative wave of potential, an increase in input resistance, and inhibition of spike activity. With worsening of the animal's condition the transepithelial potential became positive (up to +10 mV) but the input resistance of the ampulla during stimulation with a positive current was nonlinear in some cases: a regenerative spike of positive polarity appeared in the channel. During heating, the spike response was sometimes reversed in sign. It is suggested that fluctuations of the transepithelial potential and spike responses to temperature stimulation reflect changes in the potential difference on the basal membrane of the receptor cells, which is described by a relationship of the Nernst's or Goldman's equation type.I. P. Pavlov Institute of Physiology, Academy of Sciences of the USSR, Leningrad. I. M. Sechenov, Institute of Evolutionary Physiology and Biochemistry, Academy of Sciences of the USSR, Leningrad. Pacific Institute of Oceanology, Far Eastern Scientific Center, Academy of Sciences of the USSR, Vladivostok. Translated from Neirofiziologiya, Vol. 12, No. 1, pp. 67–74, January–February, 1980. 相似文献
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