龙虱吸盘超微结构与吸附能力研究

雄性龙虱的前足为抱握足,依靠附节上的吸盘产生吸附力以挟持雌虫完成交配。本文采用扫描电镜(SEM)研究东方龙虱吸盘的超微结构,包括微吸盘、吸管、刚毛等,发现微吸盘的几何形状独特,形似人足。利用生物信号采集处理系统,分别测试了龙虱吸盘在玻璃和龙虱鞘翅表面上的吸附能力。体重1.2 g的龙虱吸盘吸附在玻璃面时,法向和切向吸附力平均值分别为43.2 mN和109.1 mN,最大值分别为97.2 mN和156 mN;吸附在鞘翅表面时测得最大切向吸附力约213 mN,相当于昆虫自身体重的17倍。

Ultrastructure and Adhesive Strength of Adhesive Discs of Diving Beetles

Male diving beetles possess clasping forelegs with adhesive discs in tarsi and they can stick on the female dorsum during mating interactions.For cybister tripunctatus olivier(coleoptera/dytiscidae),the microstructure of adhesive discs are studied by scanning electron microscopy,including micro discs,suckers and setaes.It is found that the geometric shape of the micro discs particularly resemble the shape of a human foot.By the application of biology dada acquisition and processing system, the adhesive strength of the adhesive discs is measured on surfaces of a glass plate and a elytron of diving beetle.When a beetle attacheds the smooth glass surface,the mean adhesive forces in normal and lateral directions are 43.2 mN, 109.1 mN,respectively;and the maximum forces are 97.2 mN,156 mN.On the elytron surface,the maximum adhesive force in lateral direction is about 213 mN,and it is 17 times of beetle own weight.