Note
Includes bibliography.
Member of
Contributors
Publisher
Florida Atlantic University
Date Issued
2016
EDTF Date Created
2016
Description
Theory predicts that when prey can reach a size refuge from predation, prey
vulnerability to predation is a function of hatchling size, growth rate, and the handling
limitations of its predator, which collectively influence the amount of time prey spend
vulnerable. I examined the mechanistic role of prey size for the predator-prey interaction
between predatory crayfish (Procambarus fallax) and apple snail prey (Pomacea
paludosa and P. maculata) and found that crayfish feeding rates decreased with snail
size, such that smaller hatchling P. maculata were more than twenty times more
vulnerable than hatchling P. paludosa. Experimental manipulations of productivity
increased apple snail growth rates, reducing the effects of predatory crayfish on P.
maculata survivorship, but not P. paludosa survivorship. My results indicate that when
prey can reach a size refuge from predation, increased system productivity decreases
predator limitation of that prey.
vulnerability to predation is a function of hatchling size, growth rate, and the handling
limitations of its predator, which collectively influence the amount of time prey spend
vulnerable. I examined the mechanistic role of prey size for the predator-prey interaction
between predatory crayfish (Procambarus fallax) and apple snail prey (Pomacea
paludosa and P. maculata) and found that crayfish feeding rates decreased with snail
size, such that smaller hatchling P. maculata were more than twenty times more
vulnerable than hatchling P. paludosa. Experimental manipulations of productivity
increased apple snail growth rates, reducing the effects of predatory crayfish on P.
maculata survivorship, but not P. paludosa survivorship. My results indicate that when
prey can reach a size refuge from predation, increased system productivity decreases
predator limitation of that prey.
Language
Type
Form
Extent
82 p.
Subject (Topical)
Identifier
FA00004760
Additional Information
Includes bibliography.
Thesis (M.S.)--Florida Atlantic University, 2016.
FAU Electronic Theses and Dissertations Collection
Date Backup
2016
Date Created Backup
2016
Date Text
2016
Date Created (EDTF)
2016
Date Issued (EDTF)
2016
Extension
FAU
IID
FA00004760
Organizations
Attributed name: Florida Atlantic University
Attributed name: Charles E. Schmidt College of Science
Attributed name: Department of Biological Sciences
Person Preferred Name
Davidson, Andrew
author
Graduate College
Physical Description
application/pdf
82 p.
Title Plain
Predatory Impacts of Crayfish on Apple Snails (Pomacea paludosa and P. maculata)
Use and Reproduction
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Origin Information
2016
2016
Florida Atlantic University
Boca Raton, Fla.
Physical Location
Florida Atlantic University Libraries
Place
Boca Raton, Fla.
Sub Location
Digital Library
Title
Predatory Impacts of Crayfish on Apple Snails (Pomacea paludosa and P. maculata)
Other Title Info
Predatory Impacts of Crayfish on Apple Snails (Pomacea paludosa and P. maculata)