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Role of maxilla 2 and its setae during feeding in the shrimp Palaemon adspersus (Crustacea : Decapoda)

Garm, A; Hallberg, Eric LU and Hoeg, JT (2003) In Biological Bulletin 204(2). p.126-137
Abstract
The movements of the basis of maxilla 2 in Palaemon adspersus were examined using macro-video recordings, and the morphology of its setae was examined using both scanning and transmission electron microscopy. The basis of maxilla 2 performs stereotypical movements in the latero-medial plane and gently touches the food with a frequency of 3-5 Hz. The medial rim of the basis of maxilla 2 carries three types of seta. Type 1 is serrate, type 2 and 3 are serrulate, and type 2 has a prominent terminal pore. Type 2 is innervated by 18-25 sensory cells whose cilia protrude through the terminal pore and are in direct contact with the external environment. The structure of type 2 setae indicates that they are mainly gustatory, although still bimodal... (More)
The movements of the basis of maxilla 2 in Palaemon adspersus were examined using macro-video recordings, and the morphology of its setae was examined using both scanning and transmission electron microscopy. The basis of maxilla 2 performs stereotypical movements in the latero-medial plane and gently touches the food with a frequency of 3-5 Hz. The medial rim of the basis of maxilla 2 carries three types of seta. Type 1 is serrate, type 2 and 3 are serrulate, and type 2 has a prominent terminal pore. Type 2 is innervated by 18-25 sensory cells whose cilia protrude through the terminal pore and are in direct contact with the external environment. The structure of type 2 setae indicates that they are mainly gustatory, although still bimodal due to their innervation by presumed chemosensory and mechanosensory neurons. Distally, the three types of setae have a complex arrangement of the cuticle involving water-filled canals, which may serve to improve flexibility. Type I and 3 setae have fewer sensory cells (4-9) but probably also have a bimodal sensory function. The function of type I setae is probably to protect type 2 setae, while type 3 setae might serve to groom the ventral side of the basis of maxilla 1. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Biological Bulletin
volume
204
issue
2
pages
126 - 137
publisher
Marine Biological Laboratory
external identifiers
  • pmid:12700143
  • wos:000182460500003
  • scopus:0242668862
ISSN
0006-3185
language
English
LU publication?
yes
id
3229d1bb-04ab-47a1-bb37-09dda8c1bb0a (old id 312834)
alternative location
http://www.biolbull.org/cgi/content/abstract/204/2/126
date added to LUP
2007-09-03 09:58:35
date last changed
2018-01-07 09:11:26
@article{3229d1bb-04ab-47a1-bb37-09dda8c1bb0a,
  abstract     = {The movements of the basis of maxilla 2 in Palaemon adspersus were examined using macro-video recordings, and the morphology of its setae was examined using both scanning and transmission electron microscopy. The basis of maxilla 2 performs stereotypical movements in the latero-medial plane and gently touches the food with a frequency of 3-5 Hz. The medial rim of the basis of maxilla 2 carries three types of seta. Type 1 is serrate, type 2 and 3 are serrulate, and type 2 has a prominent terminal pore. Type 2 is innervated by 18-25 sensory cells whose cilia protrude through the terminal pore and are in direct contact with the external environment. The structure of type 2 setae indicates that they are mainly gustatory, although still bimodal due to their innervation by presumed chemosensory and mechanosensory neurons. Distally, the three types of setae have a complex arrangement of the cuticle involving water-filled canals, which may serve to improve flexibility. Type I and 3 setae have fewer sensory cells (4-9) but probably also have a bimodal sensory function. The function of type I setae is probably to protect type 2 setae, while type 3 setae might serve to groom the ventral side of the basis of maxilla 1.},
  author       = {Garm, A and Hallberg, Eric and Hoeg, JT},
  issn         = {0006-3185},
  language     = {eng},
  number       = {2},
  pages        = {126--137},
  publisher    = {Marine Biological Laboratory},
  series       = {Biological Bulletin},
  title        = {Role of maxilla 2 and its setae during feeding in the shrimp Palaemon adspersus (Crustacea : Decapoda)},
  volume       = {204},
  year         = {2003},
}