The Influence of Exogenous Cortisol Manipulation on Parental Investment and Reproductive Success in Nest Guarding Male Smallmouth Bass
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Parental care, providing post-fertilization care to a developing brood, is beneficial for teleost fishes. Parental care is a challenging period for fish. Stress resulting from anthropogenic influences may make this already challenging period even more difficult, with the potential for negative fitness consequences. Experimentally elevating cortisol using intraperitoneal injections is effective in exploring the potential effects of the stress hormone cortisol on parental care. In Chapter 2, using a gradient of body sizes, I explore the interactive influence that elevated cortisol, body size, and brood size have on parental care behaviours and reproductive success in nesting smallmouth bass. In Chapter 3, using accelerometers attached to nesting smallmouth bass, I examine the influence of elevated cortisol on swimming behaviours and locomotor activity level, at a fine scale and over a longer time period. These results contribute to the growing body of literature illustrating the effects of elevated cortisol on teleost reproduction.
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Copyright © 2016 the author(s). Theses may be used for non-commercial research, educational, or related academic purposes only. Such uses include personal study, research, scholarship, and teaching. Theses may only be shared by linking to Carleton University Institutional Repository and no part may be used without proper attribution to the author. No part may be used for commercial purposes directly or indirectly via a for-profit platform; no adaptation or derivative works are permitted without consent from the copyright owner.
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