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首页> 外文期刊>Biology Open >Environment-dependent prey capture in the Atlantic mudskipper (Periophthalmus barbarus)
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Environment-dependent prey capture in the Atlantic mudskipper (Periophthalmus barbarus)

机译：大西洋泥sk（Periophthalmus barbarus）中与环境有关的猎物捕获

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Few vertebrates capture prey in both the aquatic and the terrestrial environment due to the conflicting biophysical demands of feeding in water versus air. The Atlantic mudskipper (Periophthalmus barbarus) is known to be proficient at feeding in the terrestrial environment and feeds predominately in this environment. Given the considerable forward flow of water observed during the mouth-opening phase to assist with feeding on land, the mudskipper must alter the function of its feeding system to feed successfully in water. Here, we quantify the aquatic prey-capture kinematics of the mudskipper and compare this with the previously described pattern of terrestrial feeding. Prior to feeding in the aquatic environment, the gill slits open, allowing water to be expelled through the gill slits. The opposite happens in terrestrial feeding during which the gill slits remain closed at this point. In water, the expansive movements of the head are larger, amounting to a larger volume increase and are initiated slightly later than in the terrestrial environment. This implies the generation of strong suction flows when feeding in water. Consequently, the kinematic patterns of the hydrodynamic tongue during terrestrial feeding and aquatic suction feeding are similar, except for the amplitude of the volume increase and the active closing of the gill slits early during the terrestrial feeding strike. The mudskipper thus exhibits the capacity to change the kinematics of its feeding apparatus to enable successful prey capture in two disparate environments.
机译：由于在水和空气中进食的生物物理需求相互矛盾，很少有脊椎动物在水生和陆地环境中都能捕获猎物。众所周知，大西洋mud鱼（Periophthalmus barbarus）擅长在陆地环境中进食，并且主要在这种环境中进食。鉴于在张口阶段观察到有大量的水向前流动，以协助陆上进食，因此sk鱼必须改变其进食系统的功能，才能在水中成功进食。在这里，我们量化了sk鱼的水生捕食运动学，并将其与先前描述的陆生摄食模式进行了比较。在水生环境中进食之前，g裂口会张开，从而使水通过slit裂口排出。相反，在地面饲养中，feeding缝此时仍处于闭合状态。在水中，头部的膨胀运动较大，导致体积增加较大，并且开始运动的时间比陆地环境稍晚。这意味着在喂水时会产生强大的吸力流。因此，在陆生饲喂和水生吸食饲喂期间，动压舌的运动学模式相似，除了在陆生饲喂罢工的初期，体积增加的幅度和g缝的主动闭合。因此，排泥船具有改变其进给装置的运动学的能力，从而能够在两个不同的环境中成功捕获猎物。

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