Department of Natural Sciences, Hawaii Pacific University, 1 Aloha Tower Drive, Honolulu, HI 96815, USA
Hawaii Institute of Marine Biology, University of Hawaii at Manoa, Kaneohe, HI 96744, USA.
J Exp Biol. 2021 Feb 4;224(Pt 3):jeb230698. doi: 10.1242/jeb.230698.
Fast escape responses to a predator threat are fundamental to the survival of mobile marine organisms. However, elasmobranchs are often underrepresented in such studies. Here, we measured the escape latency (time interval between the stimulus and first visible reaction) of mechanically induced escape responses in the Pacific spiny dogfish, , and in two teleosts from the same region, the great sculpin, , and the pile perch, We found that the dogfish had a longer minimum latency (66.7 ms) compared with that for the great sculpin (20.8 ms) and pile perch (16.7 ms). Furthermore, the dogfish had a longer latency than that of 48 different teleosts identified from 35 different studies. We suggest such long latencies in dogfish may be due to the absence of Mauthner cells, the giant neurons that control fast escape responses in fishes.
快速逃离捕食者的威胁是移动海洋生物生存的基础。然而，此类研究往往对鲨鱼的代表性不足。在这里，我们测量了机械引发的逃避反应的逃避潜伏期（刺激和第一次可见反应之间的时间间隔）在太平洋刺鲨， 和来自同一地区的两种硬骨鱼，大杜父鱼， 和堆鲈， 我们发现狗鲨的最短潜伏期（66.7 ms）比大杜父鱼（20.8 ms）和堆鲈（16.7 ms）长。此外，狗鲨的潜伏期比从 35 项不同研究中确定的 48 种不同硬骨鱼的潜伏期都要长。我们认为狗鲨的这种较长潜伏期可能是由于缺乏控制鱼类快速逃避反应的巨神经元——麦氏神经元。
