Consequences of acute stress and cortisol manipulation on the physiology, behavior, and reproductive outcome of female Pacific salmon on spawning grounds

Hormones and Behavior
S H McConnachieS J Cooke

Abstract

Life-history theory predicts that stress responses should be muted to maximize reproductive fitness. Yet, the relationship between stress and reproduction for semelparous salmon is unusual because successfully spawning individuals have elevated plasma cortisol levels. To tease apart the effects of high baseline cortisol levels and stress-induced elevation of cortisol titers, we determined how varying degrees of cortisol elevation (i.e., acute and chronic) affected behavior, reproductive physiology, and reproductive success of adult female pink salmon (Oncorhynchus gorbuscha) relative to different states of ovulation (i.e., ripe and unripe). Exhaustive exercise and air exposure were applied as acute stressors to manipulate plasma cortisol in salmon either confined to a behavioral arena or free-swimming in a spawning channel. Cortisol (eliciting a cortisol elevation to levels similar to those in post-spawn female salmon) and metyrapone (a corticosteroid synthesis inhibitor) implants were also used to chemically manipulate plasma cortisol. Cortisol implants elevated plasma cortisol, and impaired reproductive success; cortisol-treated fish released fewer eggs and died sooner than fish in other treatment groups. In contrast, acute s...Continue Reading

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Citations

Oct 20, 2012·Reproduction : the Official Journal of the Society for the Study of Fertility·Mao LiJohn F Leatherland
Mar 25, 2014·Hormones and Behavior·Rodrigo Egydio BarretoAnette Hoffmann
Apr 29, 2014·General and Comparative Endocrinology·Katrina V CookSteven J Cooke
Mar 13, 2014·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Michael R DonaldsonKristina M Miller
Jan 20, 2017·Journal of Experimental Zoology. Part A, Ecological Genetics and Physiology·Pauline M CapelleOliver P Love
Jan 23, 2017·General and Comparative Endocrinology·Federico VeraC Daniel Antenucci
Jan 1, 2015·Conservation Physiology·Natalie M SopinkaSteven J Cooke
Oct 17, 2018·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Kelsie A MillerDavid L Berlinsky
Sep 21, 2020·General and Comparative Endocrinology·Laura A SchoenleMaren N Vitousek
Aug 2, 2020·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Madison L EarhartW Gary Anderson
Oct 13, 2020·General and Comparative Endocrinology·Karine RousseauSylvie Dufour
Jun 16, 2018·Environmental Science & Technology·Jith K ThomasMathilakath M Vijayan
Sep 23, 2021·Ecological Applications : a Publication of the Ecological Society of America·Erin S McCallumTomas Brodin

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