Relationship between oxidative stress and circulating testosterone and cortisol in pre-spawning female brown trout

Hoogenboom, Mia O., Metcalfe, Neil B., Groothuis, Ton G.G., de Vries, Bonnie, and Costantini, David (2012) Relationship between oxidative stress and circulating testosterone and cortisol in pre-spawning female brown trout. Comparative Biochemistry and Physiology A - Molecular and Integrative Physiology, 163 (3-4). pp. 379-387.

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Abstract

Reproduction in vertebrates is an energy-demanding process that is mediated by endogenous hormones and potentially results in oxidative stress. The primary aim of this study was to quantify the relationship between oxidative stress parameters (antioxidant capacity and levels of reactive oxygen metabolites) and circulating testosterone and cortisol in a common and widespread teleost fish, the brown trout (Salmo trutta. L). Results show that trout with higher testosterone levels prior to spawning have higher levels of oxidative damage at the time that they spawn (although by the time of spawning testosterone levels had dropped, leading to a negative relationship between testosterone and oxidative damage at that time). Cortisol levels were not directly related to oxidative damage or antioxidant capacity, but concentrations of this hormone were positively related to levels of fungal infection, which was itself associated both with lower antioxidant capacity and lower levels of oxidative damage. These results highlight the complexity of interactions between different components of the endocrine system and metabolism and suggest that caution be used in interpreting relationships between a single hormone and indicators of oxidative balance or other fitness proxies.

Item ID: 27137
Item Type: Article (Research - C1)
ISSN: 1095-6433
Keywords: androgen hormones, glucocorticoids, lipid peroxidation, reactive oxygen species, saprolegnia, Salmo trutta
Date Deposited: 23 May 2013 11:51
FoR Codes: 06 BIOLOGICAL SCIENCES > 0606 Physiology > 060604 Comparative Physiology @ 50%
06 BIOLOGICAL SCIENCES > 0608 Zoology > 060803 Animal Developmental and Reproductive Biology @ 50%
SEO Codes: 96 ENVIRONMENT > 9608 Flora, Fauna and Biodiversity > 960807 Fresh, Ground and Surface Water Flora, Fauna and Biodiversity @ 70%
97 EXPANDING KNOWLEDGE > 970106 Expanding Knowledge in the Biological Sciences @ 30%
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