How do red-eyed treefrog embryos sense motion in predator attacks? Assessing the role of vestibular mechanoreception

Julie Jung, Su J. Kim, Sonia M. Pérez Arias, James G. McDaniel & Karen M. Warkentin
The widespread ability to alter hatching timing in response to environmental cues can serve as a defense against threats to eggs. Arboreal embryos of red-eyed treefrogs, Agalychnis callidryas, hatch up to 30% prematurely to escape predation. This escape-hatching response is cued by physical disturbance of eggs during attacks, including vibrations or motion, and thus depends critically on mechanosensory ability. Predator-induced hatching appears later in development than flooding-induced, hypoxia-cued hatching; thus, its onset is not constrained...
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