Aquatic feeding in pipid frogs: the use of suction for prey capture
Aquatic feeding in pipid frogs: the use of suction for prey capture
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DOI：
10.1242/jeb.043380
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发表时间：
2010-06-15
影响因子：
2.8
通讯作者：
Nishikawa, Kiisa C.
中科院分区：
文献类型：
--
作者：
Carreno, Carrie A.;Nishikawa, Kiisa C.
惯性吸食是水生脊椎动物中最常见的捕食方式。然而，目前还不清楚水蛙科水蛙是否也使用惯性吸力捕捉猎物。在这项研究中，我们研究了四种琵琶，琵琶，非洲爪哇，膜壳虫和假膜壳虫的取食行为。在捕获猎物的过程中，测量了颊咽腔内的压力。这些压力测量与喂食行为的高速记录相结合。对于每个物种，口腔咽内压显著低于环境压力，压力的变化与张嘴的开始相对应。运动学分析表明，所有种类的管状动物在捕获猎物的过程中都会产生亚环境压力；伯格里管虫和梅里尼管虫完全依赖惯性吸食。PIPA琵琶和X.laevis在捕获猎物时还使用前肢铲，但这两个物种都表现出仅用惯性吸力捕获猎物的能力。根据口咽部压力测量和运动学分析，我们得出结论，在捕获猎物的过程中，这四种管状动物使用的是惯性吸食。
Inertial suction feeding is the most common method of prey capture among aquatic vertebrates. However, it had been unclear whether the aquatic frogs in the family Pipidae also used inertial suction for prey capture. In this study, we examined feeding behavior in four species of pipids, Pipa pipa, Xenopus laevis, Hymenochirus boettgeri and Pseudhymenochirus merlini. Pressure in the buccopharyngeal cavity was measured during prey capture. These pressure measurements were coupled with high-speed recordings of feeding behavior. For each species, the internal buccopharyngeal pressure was found to drop significantly below ambient pressure, and changes in pressure corresponded with the onset of mouth opening. Kinematic analysis revealed that all species of pipids generated subambient pressure during prey capture; H. boettgeri and P. merlini relied solely on inertial suction feeding. Pipa pipa and X. laevis additionally employed forelimb scooping during prey capture but both of these species demonstrated the ability to capture prey with inertial suction alone. Based on buccopharyngeal pressure measurements as well as kinematic analyses, we conclude that inertial suction feeding is used during prey capture in these four species of pipids.