The Polyarthra escape from response: Defense against interference from Daphnia
The Polyarthra escape from response: Defense against interference from Daphnia
复制标题
多关节炎逃避反应：防御水蚤的干扰
作者：
J. J. Gilbert
直接观察表明，几乎所有（97%）的多节目蚤捕获的吸入流的蚤状蚤通过启动逃逸反应避免吸入。显微视频分析显示，当多节虫以大约1.4 mm s-1（大约是它们正常游泳速度的6倍- 0.24 mm s-1）的速度移动时，这些反应平均在距离鳃腔吸入口0.24 mm（大约2.5个体长）处开始。逃避反应的刺激可能是快速加速，或者更可能是剪切。多节虫逃逸反应的平均距离至少为1.25 mm（约12个体长），多节虫逃逸反应可以有效地防御水蚤的干扰，并可能大大提高多节虫的能力。与水蚤共存
Direct observations show that almost all (97%) Polyarthra remata caught in the inhalant current of Daphnia pulex avoid inhalation by initiating escape responses. Microvideographic analysis shows that these responses are initiated, on average, 0.24 mm (about 2.5 body lengths) from the inhalant opening of the branchial chamber, when the Polyarthra are moving at a velocity of about 1.4 mm s−1 (about 6 times their normal swimming speed — 0.24 mm s−1). The stimulus for the escape response could be rapid acceleration or, more likely, shear. The average distance traveled during an escape response is at least 1.25 mm (about 12 body lengths).The Polyarthra escape response can provide a very effective defense against interference from Daphnia and may greatly increase the ability of Polyarthra spp. to coexist with Daphnia.