Sensory systems in sawfishes. 1. The ampullae of Lorenzini

Wueringer, B. E., Peverell, S. C., Seymour, J., Squire, L., Kajiura, S. M. and Collin, S. P. (2011) Sensory systems in sawfishes. 1. The ampullae of Lorenzini. Brain Behavior and Evolution, 78 2: 139-149. doi:10.1159/000329515

Author Wueringer, B. E.
Peverell, S. C.
Seymour, J.
Squire, L.
Kajiura, S. M.
Collin, S. P.
Title Sensory systems in sawfishes. 1. The ampullae of Lorenzini
Journal name Brain Behavior and Evolution   Check publisher's open access policy
ISSN 0006-8977
Publication date 2011-08-01
Sub-type Article (original research)
DOI 10.1159/000329515
Volume 78
Issue 2
Start page 139
End page 149
Total pages 11
Place of publication Basel, Switzerland
Publisher S. Karger AG
Language eng
Formatted abstract
The distribution and density of the ampullary electroreceptors in the skin of elasmobranchs are influenced by the phylogeny and ecology of a species. Sensory maps were created for 4 species of pristid sawfish. Their ampullary pores were separated into pore fields based on their innervation and cluster formation. Ventrally, ampullary pores are located in 6 areas (5 in Pristis microdon), covering the rostrum and head to the gills. Dorsally, pores are located in 4 areas (3 in P. microdon), which cover the rostrum, head and may extend slightly onto the pectoral fins. In all species, the highest number of pores is found on the dorsal and ventral sides of the rostrum. The high densities of pores along the rostrum combined with the low densities around the mouth could indicate that sawfish use their rostrum to stun their prey before ingesting it, but this hypothesis remains to be tested. The directions of ampullary canals on the ventral side of the rostrum are species specific. P. microdon possesses the highest number of ampullary pores, which indicates that amongst the study species this species is an electroreception specialist. As such, juvenile P. microdon inhabit low-visibility freshwater habitats.
Keyword Electroreception
Ampullae of Lorenzini
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2012 Collection
School of Biomedical Sciences Publications
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Created: Tue, 18 Oct 2011, 01:22:29 EST by Bacsweet Kaur on behalf of School of Biomedical Sciences