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Chemosensory neurons in the mouthparts of the spiny lobsters Panulirus argus and Panulirus interruptus (Crustacea : Decapoda)

Garm, Anders LU ; Shabani, S; Hoeg, J T and Derby, C D (2005) In Journal of Experimental Marine Biology and Ecology 314(2). p.175-186
Abstract
We studied electrophysiological properties of single chemosensory neurons in the mouthparts of the spiny lobsters Panulirus argus and Panulirus interruptus to complement our growing understanding of the behavioral roles of mouthparts of decapod crustaceans. Food mixtures and 13 single compounds were used to characterize the response specificity, sensitivity, and time course of individual neurons in the endopods of maxilliped 2 and 3. Additional chemoreceptors were found in the mandibular palp and basis of maxilliped 1 but they were not characterized. Neurons were broadly tuned, with the five most potent single compounds being ammonium, adenosine-5' -monophosphate, taurine, glutamate, and aspartate. Cluster analysis indicated that the... (More)
We studied electrophysiological properties of single chemosensory neurons in the mouthparts of the spiny lobsters Panulirus argus and Panulirus interruptus to complement our growing understanding of the behavioral roles of mouthparts of decapod crustaceans. Food mixtures and 13 single compounds were used to characterize the response specificity, sensitivity, and time course of individual neurons in the endopods of maxilliped 2 and 3. Additional chemoreceptors were found in the mandibular palp and basis of maxilliped 1 but they were not characterized. Neurons were broadly tuned, with the five most potent single compounds being ammonium, adenosine-5' -monophosphate, taurine, glutamate, and aspartate. Cluster analysis indicated that the neurons constitute a heterogeneous population that could be placed into seven groups linked according to their most excitatory compound. These neurons in the mouthparts had concentration-dependent responses, with thresholds between 10(-7) and 10(-4) M and without saturation even at 10(-3) or 10(-2) M. They also quickly adapted when exposed to their best compounds at 10(-4) and 10(-3) M. A comparison of the response properties of these neurons in the mouthparts with those of chemosensory neurons in other crustacean appendages shows that neurons in the mouthparts have relatively broad tuning biased toward detecting and resolving high concentrations. Based on these comparisons, we suggest a functional distinction among the chemosensors on the different appendages: long distance detection by the antennae, precise location and collection by the pereiopods, and detailed assessment of quality by the mouthparts. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
electrophysiology, adaptation, gustation, chemoreceptors, chemical senses
in
Journal of Experimental Marine Biology and Ecology
volume
314
issue
2
pages
175 - 186
publisher
Elsevier
external identifiers
  • wos:000227104500005
  • scopus:11844249356
ISSN
0022-0981
DOI
10.1016/j.jembe.2004.08.016
language
English
LU publication?
yes
id
b3b719a3-46bd-4c95-9d8a-2aa831068bf6 (old id 253596)
date added to LUP
2007-08-07 13:03:58
date last changed
2017-10-22 04:29:40
@article{b3b719a3-46bd-4c95-9d8a-2aa831068bf6,
  abstract     = {We studied electrophysiological properties of single chemosensory neurons in the mouthparts of the spiny lobsters Panulirus argus and Panulirus interruptus to complement our growing understanding of the behavioral roles of mouthparts of decapod crustaceans. Food mixtures and 13 single compounds were used to characterize the response specificity, sensitivity, and time course of individual neurons in the endopods of maxilliped 2 and 3. Additional chemoreceptors were found in the mandibular palp and basis of maxilliped 1 but they were not characterized. Neurons were broadly tuned, with the five most potent single compounds being ammonium, adenosine-5' -monophosphate, taurine, glutamate, and aspartate. Cluster analysis indicated that the neurons constitute a heterogeneous population that could be placed into seven groups linked according to their most excitatory compound. These neurons in the mouthparts had concentration-dependent responses, with thresholds between 10(-7) and 10(-4) M and without saturation even at 10(-3) or 10(-2) M. They also quickly adapted when exposed to their best compounds at 10(-4) and 10(-3) M. A comparison of the response properties of these neurons in the mouthparts with those of chemosensory neurons in other crustacean appendages shows that neurons in the mouthparts have relatively broad tuning biased toward detecting and resolving high concentrations. Based on these comparisons, we suggest a functional distinction among the chemosensors on the different appendages: long distance detection by the antennae, precise location and collection by the pereiopods, and detailed assessment of quality by the mouthparts.},
  author       = {Garm, Anders and Shabani, S and Hoeg, J T and Derby, C D},
  issn         = {0022-0981},
  keyword      = {electrophysiology,adaptation,gustation,chemoreceptors,chemical senses},
  language     = {eng},
  number       = {2},
  pages        = {175--186},
  publisher    = {Elsevier},
  series       = {Journal of Experimental Marine Biology and Ecology},
  title        = {Chemosensory neurons in the mouthparts of the spiny lobsters Panulirus argus and Panulirus interruptus (Crustacea : Decapoda)},
  url          = {http://dx.doi.org/10.1016/j.jembe.2004.08.016},
  volume       = {314},
  year         = {2005},
}