We are inviting IDEALS users, both people looking for materials in IDEALS and those who want to deposit their work, to give us feedback on improving this service through an interview. Participants will receive a $20 VISA gift card. Please sign up via webform.

Files in this item

FilesDescriptionFormat

application/pdf

application/pdfZuckerman_Zachary.pdf (296kB)
(no description provided)PDF

Description

Title:Life history trade-offs in a parental care-providing fish: the role of reproductive value, predation threat, and physiological condition on brood abandonment decisions by paternal largemouth bass
Author(s):Zuckerman, Zachary
Advisor(s):Suski, Cory D.
Department / Program:Natural Res & Env Sci
Discipline:Natural Res & Env Sciences
Degree Granting Institution:University of Illinois at Urbana-Champaign
Degree:M.S.
Genre:Thesis
Subject(s):Parental care
stress
oxidative stress
nutritional condition
offspring abandonment
recruitment
reproductive success
brood loss
brood depredation
Largemouth bass
Micropterus salmoides
fitness
Abstract:Parental care evolved as a means to maximize reproductive success at a cost to physiological and nutritional condition of the care-providing individual, and at a cost to future reproductive potential. Parental investment decisions are rooted in tradeoffs between these factors, and when the cost of care-provision is outweighed by potential future reproductive potential, a parent may forfeit current investment in an effort to maximize future reproductive success. Few studies have approached parental care decisions using offspring abandonment as a direct and ultimate fitness affect, and fewer yet have adopted a holistic approach to test how physiological and environmental conditions compare in influencing the decision by a parent to abandon their brood. I performed two separate, yet complementary, studies to test for the effects of several factors on brood abandonment decisions in largemouth bass (Micropterus salmoides); a model parental care-providing species. First, I tested whether mating success and simulated brood depredation affect the decision by paternal largemouth bass to abandon a brood. Second, I used a multivariate approach to jointly test for the influence of nutritional condition, hormonal stress, androgen concentration, and oxidative stress of brood-guarding paternal largemouth bass, and the threat of brood depredation (i.e., brood predator density), on brood abandonment decisions. Together, my results suggested a threshold for brood loss at which paternal largemouth bass were more likely to abandon what remains of a depredated brood, and that a high threat of depredation and reduced androgen concentration also influenced the decision by paternal bass to abandon care. My findings have implications for science-based management of a highly sought-after sportfish, as well as offer a novel approach for testing the inter-related effects of various abiotic and biotic factors on parental care decisions across taxa.
Issue Date:2012-06-27
URI:http://hdl.handle.net/2142/31969
Rights Information:Copyright 2012 Zachary Zuckerman
Date Available in IDEALS:2014-06-28
Date Deposited:2012-05


This item appears in the following Collection(s)

Item Statistics