Water uptake via two pairs of specialized legs in Ligia exotica (Crustacea, Isopoda)
Water uptake via two pairs of specialized legs in Ligia exotica (Crustacea, Isopoda)
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DOI：
10.2307/25066635
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发表时间：
2007-10-01
影响因子：
1.6
通讯作者：
Hariyama, Takahiko
中科院分区：
文献类型：
--
作者：
Horiguchi, Hiroko;Hironaka, Mantaro;Hariyama, Takahiko
当Ligia exotica个体暴露于干燥环境中时，它们的体重在3 h内下降至初始体重的90%。当动物随后被呈现湿纸时，腹足动物VI和VII被牢固地并置并四处移动，直到它们的尖端静止几秒钟。随后，将腹足浸泡在水中，体重恢复。形态学观察发现，空心结构的表面上的dactylus和propodus的pereiopods VI和VII，和一系列薄的表皮突起，定向在几个平行线，从propodite到ischiopodite的pereiopod VI和basipodite的pereiopod VII。平行线之间的宽度变化不大，但规则线的总宽度随身体大小的增加而线性增加。当孤立的尾部pereiopods浸入，从远端开始，在水中，水流沿着pereiopod六至于近端的坐足，但水流沿着pereiopod七只发生在与basipodite。这意味着腿的吸水需要pereiopods VI和VII，并且只有当这些腿紧密并置时才能实现。
When individuals of Ligia exotica were exposed to dry environments, their weight decreased within 3 h to 90% of the initial weight. When the animals were subsequently presented with wet paper, pereiopods VI and VII were firmly apposed and moved around until their tips were stationary for some seconds. Subsequently the pleopods became soaked in water and the body weight recovered. Morphological observations revealed hollow structures on the surface of the dactylus and propodus of pereiopods VI and VII, and a series of thin cuticular protrusions, oriented in several parallel lines, from the propodite to the ischiopodite of pereiopod VI and on the basipodite of pereiopod VII. The width between the parallel lines varied little, but the total width of the regular lines increased linearly with increasing body size. When isolated caudal pereiopods were immersed, beginning at the distal end, in water, water flowed along pereiopod VI as far as the proximal end of the ischiopodite, but water flow along pereiopod VII occurred only in conjunction with the basipodite. This means that water uptake with the legs requires both pereiopods VI and VII and can be achieved only when these legs are closely apposed.