Distribution and morphology of the ampullary organs of the estuarine long-tailed catfish, Euristhmus lepturus (Plotosidae, Siluriformes)

Whitehead, Darryl L., Kwik, Jeffrey T. B. and Tibbetts, Ian R. (2009) Distribution and morphology of the ampullary organs of the estuarine long-tailed catfish, Euristhmus lepturus (Plotosidae, Siluriformes). Zoomorphology, 128 2: 111-117. doi:10.1007/s00435-008-0078-0


Author Whitehead, Darryl L.
Kwik, Jeffrey T. B.
Tibbetts, Ian R.
Title Distribution and morphology of the ampullary organs of the estuarine long-tailed catfish, Euristhmus lepturus (Plotosidae, Siluriformes)
Journal name Zoomorphology   Check publisher's open access policy
ISSN 0720-213X
1432-234X
Publication date 2009-04-01
Year available 2009
Sub-type Article (original research)
DOI 10.1007/s00435-008-0078-0
Open Access Status Not yet assessed
Volume 128
Issue 2
Start page 111
End page 117
Total pages 7
Place of publication Berlin ; New York
Publisher Springer-Verlag
Language eng
Subject 06 Biological Sciences
0608 Zoology
Abstract Ampullary organs of Euristhmus lepturus occur in high densities along the head and in four parallel pathways along the trunk of the body. Large ampullary pores (125–130 μm) are easily distinguishable from other sensory epithelial pores due to the differences in size and the presence of a collar-like structure. Simple, singular ampullary organs of the head region consist of an ampullary pore connected to a long canal with a diameter of 115–175 μm before terminating as a simple ampulla with an external diameter of 390–480 μm. The ampullary canal is composed of 1–2 layers of flattened squamous epithelial cells, the basement membrane and an interlocking collagen sheath. The innermost cells lining the canal wall are adjoined via tight junctions and numerous desmosomes, as are those of the receptor and supportive cells. Canal wall tissue gives rise to a sensory epithelium containing between 242 and 285 total receptor cells, with an average diameter of 11.7 ± 5.3 μm, intermixed with medially nucleated supportive cells. Each receptor cell (21.38 ± 4.41 μm, height) has an apically positioned nucleus and a luminal surface covered with numerous microvilli. Neural terminals abut the basal region of receptor cells opposite multiple presynaptic bodies and dense mitochondria. Supportive cells extend from the ampullary lumen to the basement membrane, which is adjacent to the complex system of collagen fibres.
Keyword Ampullary organ
Fresh-water ray
Plasticity
Electroreception
Euristhmus lepturus
Plotosidae
Siluriformes
Q-Index Code C1
Q-Index Status Provisional Code
Grant ID SMS/ZOO/068/98/URG
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Biological Sciences Publications
Ecology Centre Publications
Centre for Marine Studies Publications
 
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Created: Thu, 03 Sep 2009, 18:19:23 EST by Mr Andrew Martlew on behalf of Faculty of Science