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Cited by 56Marine Invertebrate Physiology and EcologyNeuropeptides and Animal PhysiologyNeurobiology and Insect Physiology Research

Neural control of the velum in larvae of the gastropod,Ilyanassa obsoleta

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Braubach, Oliver R., Dickinson, Amanda J. G., Evans, Carol C. E., Croll, Roger P.·2006·Journal of Experimental Biology
DOI 10.1242/jeb.02556
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Abstract

Larval molluscs commonly use ciliated vela to swim and feed. In this study we used immunohistochemistry to demonstrate innervation of velar cilia and muscles by monoaminergic and peptidergic fibres in the caenogastropod, Ilyanassa obsoleta. Photoelectric recordings from pre-oral cilia on isolated pieces of velum revealed that serotonin increased, whereas catecholamines (dopamine and norepinephrine) decreased beat frequency at concentrations of 10(-6) to 10(-9) mol l(-1). Catecholamines also increased the frequency of momentary, isolated arrests of pre-oral cilia, but failed to suppress beating of the post-oral cilia at these concentrations. The neuropeptides, FMRFamide and Leu-enkephalin, did not affect the frequency of ciliary beating or of isolated ciliary arrests, but did induce numerous muscular contractions, which were accompanied by sustained ciliary arrests. In terms of whole animal behaviour, serotonin caused larvae to concentrate toward the top of a water column and to increase feeding, whereas catecholamines caused larvae to concentrate toward the bottom of a water column and decrease feeding. Monoamine analogues which facilitated or opposed the effects of synthetic transmitters on larval behaviour, further suggested that these transmitters are released endogenously to control velar function. Finally, applications of peptides to whole larvae caused increased frequency of locomotory arrests. Together these findings demonstrate several potential roles for the nervous system in controlling larval behaviour in gastropods.

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  • Serotonin seems to play a general role in the upregulation of ciliary beat frequency in mollusc, echinoderm and annelid larvae.

    “Serotonin seems to play a general role in the upregulation of ciliary beat frequency (in mollusc [48], echinoderm [49,50] and annelid (G. Jékely unpublished) larvae), and the control of cilia by a sensory-motor serotonergic system may trace back to the common ancestor of protostomes and deuterostomes.”

    From Origin and early evolution of neural circuits for the control of ciliary locomotion (2011) · cites this paper as [48]

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Research works printed but not linked: 3

  1. Aiello, E. (1990). Nervous control of gill ciliary activity in Mytilus edulis. In Neurobiology of Mytilus edulis (ed. G. B. Stefano), pp. 189-208. Manchester, New York: Manchester University Press.
  2. Fretter, V. (1967). The prosobranch veliger. Proc. Malacol. Soc. London 37, 357-366.
  3. Plummer, J. T. (2002). The bivalve larval nervous system. MSc Thesis, Department of Physiology and Biophysics, Dalhousie University, Halifax, Nova Scotia, Canada.

Related

Authors
Braubach, O. R., Dickinson, A. J. G., Evans, C. C. E., & Croll, R. P.
Affiliations
Dalhousie University (CA)
Corresponding author
Croll, Roger P.
ORCID
Venue
Journal of Experimental Biology
Publisher
The Company of Biologists
Published
2006-12-01
Volume
209
Issue
23
Pages
4676-4689
ISSN
  • 0022-0949 (ISSN-L)
  • 1477-9145
DOI
10.1242/jeb.02556
OpenAlex
W1968882477
Cited by
56
References
78
Citations by year
2026: 1 · 2025: 4 · 2022: 2 · 2021: 1 · 2020: 5 · 2019: 5 · 2017: 5 · 2016: 6 · 2015: 3 · 2014: 3 · 2013: 3 · 2012: 2
FWCI
2.50
Type
journal article
Language
en
Open access
Locations
  • Journal of Experimental Biology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Physical Sciences › Earth and Planetary Sciences › Paleontology › Marine Invertebrate Physiology and Ecology
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuropeptides and Animal Physiology
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurobiology and Insect Physiology Research
Keywords
Ilyanassa obsoleta, ciliary beating, larval swimming, serotonin, catecholamines, dopamine, norepinephrine, FMRFamide, leu-enkephalin, neuropeptides, larval behavior, feeding behaviour
MeSH terms
Animals, Behavior, Animal, Cilia, Larva, Motor Activity, Neurons, Gastropoda

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