Note
Includes bibliography.
Member of
Contributors
Publisher
Florida Atlantic University
Date Issued
2006
EDTF Date Created
2006
Description
Sharks possess an electrosensory system which allows the detection of
electric fields . How this system varies among related taxa and among species
inhabiting different environments remains unexplored. Electroreceptor number
was quantified for representative species of related taxa (genera, families, orders)
from different environments (pelagic, coastal, deepwater) and taxa from similar
environments to determine potential phylogenetic constraint or evolutionary
convergence. Coastal open water sharks possess the greatest number of
electroreceptors; deepwater sharks the least. Pelagic and coastal benthic sharks
retain comparable electrosensory pore numbers despite inhabiting vastly different
environments. Electrosensory pores were primarily located in ventral
distributions, except among coastal open water sharks which possess roughly
even distributions around the head. Among related species and genera, pore
numbers and distribution are comparable, with greater variation among higher
taxa. Results implicate evolutionary convergence as the primary influence in
electroreceptor development, while phylogenetic constraint establishes similar
base values for number and distribution.
electric fields . How this system varies among related taxa and among species
inhabiting different environments remains unexplored. Electroreceptor number
was quantified for representative species of related taxa (genera, families, orders)
from different environments (pelagic, coastal, deepwater) and taxa from similar
environments to determine potential phylogenetic constraint or evolutionary
convergence. Coastal open water sharks possess the greatest number of
electroreceptors; deepwater sharks the least. Pelagic and coastal benthic sharks
retain comparable electrosensory pore numbers despite inhabiting vastly different
environments. Electrosensory pores were primarily located in ventral
distributions, except among coastal open water sharks which possess roughly
even distributions around the head. Among related species and genera, pore
numbers and distribution are comparable, with greater variation among higher
taxa. Results implicate evolutionary convergence as the primary influence in
electroreceptor development, while phylogenetic constraint establishes similar
base values for number and distribution.
Language
Type
Form
Extent
111 p.
Subject (Topical)
Identifier
FA00000737
Additional Information
Includes bibliography.
Thesis (M.S.)--Florida Atlantic University, 2006.
Charles E. Schmidt College of Science
FAU Electronic Theses and Dissertations Collection
Date Backup
2006
Date Created Backup
2006
Date Text
2006
Date Created (EDTF)
2006
Date Issued (EDTF)
2006
Extension
FAU
IID
FA00000737
Organizations
Attributed name: Florida Atlantic University
Person Preferred Name
Cornett, Anthony D.
Graduate College
Physical Description
application/pdf
111 p.
Title Plain
Ecomorphology of Shark Electroreceptors
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.
http://rightsstatements.org/vocab/InC/1.0/
Origin Information
2006
2006
Florida Atlantic University
Boca Raton, Fla.
Physical Location
Florida Atlantic University Libraries
Place
Boca Raton, Fla.
Sub Location
Digital Library
Title
Ecomorphology of Shark Electroreceptors
Other Title Info
Ecomorphology of Shark Electroreceptors