Laboratory of Functional and Evolutionary Morphology, AFFISH-RC, University of Liege, Liège, Belgium.
UFR SFA, iPHEP, UMR CNRS 7262, Université de Poitiers, Poitiers, France.
J Anat. 2020 Sep;237(3):468-477. doi: 10.1111/joa.13212. Epub 2020 May 20.
The few works on audition in sharks and rays concern only adult specimens. We report the hearing abilities in the dogfish Scyliorhinus canicula at different stages, from embryos that still have their yolk sac inside their egg, to juveniles. Hearing development corresponds to an increase in the frequency range from 100-300 Hz in early pre-hatching stages to 100-600 Hz in juveniles. Modifications in hearing abilities correspond to the development of the brain, the increase of the volume of the membranous labyrinth, the growth of the sensory epithelium, and the development of stereocilia in addition to kinocilium before hatching. This work offers solid insights into the development of hearing abilities that usually can only be inferred from the anatomy of vertebrates or after birth/hatching. It shows also that shark can be sensitive to background noise during development.
关于鲨鱼和鳐鱼听觉的研究很少，仅涉及成年标本。我们报告了狗鲨（Scyliorhinus canicula）在不同阶段的听觉能力，从仍在卵内蛋黄囊的胚胎到幼鲨。听觉发育与频率范围从孵化前早期的 100-300 Hz 增加到幼鲨的 100-600 Hz 相对应。听觉能力的变化与大脑的发育、膜迷路体积的增加、感觉上皮的生长以及除孵化前的纤毛外的动毛的发育相对应。这项工作为听觉能力的发育提供了可靠的见解，这些通常只能从脊椎动物的解剖结构或出生/孵化后推断出来。它还表明，鲨鱼在发育过程中可能对背景噪音敏感。
