Lateral line sensitivity in free-swimming toadfish Opsanus tau

Allen Mensinger, Jacey C. Van Wert, Loranzie S. Rogers

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

A longstanding question in aquatic animal sensory physiology is the impact of self-generated movement on lateral line sensitivity. One hypothesis is that efferent modulation of the sensory hair cells cancels self-generated noise and allows fish to sample their surroundings while swimming. In this study, microwire electrodes were chronically implanted into the anterior lateral line nerve of oyster toadfish and neural activity was monitored during forward movement. Fish were allowed to freely swim or were moved by a tethered sled. In all cases, neural activity increased during movement with no evidence of efferent modulation. The anterior lateral line of moving fish responded to a vibrating sphere or the tail oscillations of a robotic fish, indicating that the lateral line also remains sensitive to outside stimulus during self-generated movement. The results suggest that during normal swim speeds, lateral line neuromasts are not saturated and retain the ability to detect external stimuli without efferent modulation.

Original languageEnglish (US)
Article numberjeb190587
JournalJournal of Experimental Biology
Volume222
Issue number2
DOIs
StatePublished - Jan 2019

Bibliographical note

Funding Information:
Funding was provided by National Science Foundation grants IOS 1354745 and DBI 1359230 and 1659604.

Keywords

  • Efferent
  • Hair cell
  • Modulation
  • Self-generated movement

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