Note
Includes bibliography.
Member of
Contributors
Publisher
Florida Atlantic University
Date Issued
2008
EDTF Date Created
2008
Description
This study determined the electrosensitivity of a euryhaline elasmobranch,
the Atlantic stingray, Dasyatis sabina, throughout the range of salinities that it
would naturally encounter. It quantified the behavioral response of the stingrays to prey-simulating electric stimuli in freshwater, brackish, and full strength
seawater. The electroreceptive capability of stingrays from a permanent
freshwater population in the St. Johns River system was also compared with
stingrays that inhabit the tidally-dynamic Indian River Lagoon in east Florida.
This study demonstrated that D. sabina can detect prey-simulating electric fields
in freshwater, but the function of its electrosensory system is significantly
reduced. The SJR stingrays did not demonstrate an enhanced electrosensitivity
in freshwater, nor did they have reduced sensitivity when introduced to higher
salinities. The reduction in electrosensitivity and detection range in freshwater is
attributed to both an environmental factor (electrical resistivity of the water) and
the physiological limitations of the ampullary canals.
the Atlantic stingray, Dasyatis sabina, throughout the range of salinities that it
would naturally encounter. It quantified the behavioral response of the stingrays to prey-simulating electric stimuli in freshwater, brackish, and full strength
seawater. The electroreceptive capability of stingrays from a permanent
freshwater population in the St. Johns River system was also compared with
stingrays that inhabit the tidally-dynamic Indian River Lagoon in east Florida.
This study demonstrated that D. sabina can detect prey-simulating electric fields
in freshwater, but the function of its electrosensory system is significantly
reduced. The SJR stingrays did not demonstrate an enhanced electrosensitivity
in freshwater, nor did they have reduced sensitivity when introduced to higher
salinities. The reduction in electrosensitivity and detection range in freshwater is
attributed to both an environmental factor (electrical resistivity of the water) and
the physiological limitations of the ampullary canals.
Language
Type
Form
Extent
40 p.
Subject (Topical)
Identifier
FA00000797
Additional Information
Includes bibliography.
Thesis (M.A.)--Florida Atlantic University, 2008.
FAU Electronic Theses and Dissertations Collection
Date Backup
2008
Date Created Backup
2008
Date Text
2008
Date Created (EDTF)
2008
Date Issued (EDTF)
2008
Extension
FAU
IID
FA00000797
Organizations
Attributed name: Florida Atlantic University
Attributed name: Department of Biological Sciences
Attributed name: Charles E. Schmidt College of Science
Person Preferred Name
McGowan, David W.
Graduate College
Physical Description
application/pdf
40 p.
Title Plain
Electroreception in the Euryhaline Stingray, Dasyatis sabina
Use and Reproduction
Copyright © is held by the author with permission granted to Florida Atlantic University to digitize, archive and distribute this item for non-profit research and educational purposes. Any reuse of this item in excess of fair use or other copyright exemptions requires permission of the copyright holder.
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Origin Information
2008
2008
Florida Atlantic University
Boca Raton, Fla.
Physical Location
Florida Atlantic University Libraries
Place
Boca Raton, Fla.
Sub Location
Digital Library
Title
Electroreception in the Euryhaline Stingray, Dasyatis sabina
Other Title Info
Electroreception in the Euryhaline Stingray, Dasyatis sabina