Comparison of vegetable shortening and cocoa butter as vehicles for cortisol manipulation in Salmo trutta
| Autor: | Kathleen M. Gilmour, Martin Hage Larsen, Kathryn S. Peiman, Steven J. Cooke, Kim Aarestrup, Kim Birnie-Gauvin |
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| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
endocrine system Plasma glucose 010604 marine biology & hydrobiology food and beverages Aquatic Science Biology biology.organism_classification 010603 evolutionary biology 01 natural sciences Brown trout Animal science Plasma cortisol Temperate climate Juvenile Salmo Post treatment hormones hormone substitutes and hormone antagonists Ecology Evolution Behavior and Systematics |
| Zdroj: | Journal of Fish Biology. 92:229-236 |
| ISSN: | 0022-1112 |
| DOI: | 10.1111/jfb.13513 |
| Popis: | This study demonstrates that vegetable shortening and cocoa butter are two effective vehicles for intraperitoneal cortisol implants in juvenile teleosts, specifically brown trout Salmo trutta, residing in north temperate freshwater environments. Each vehicle showed a different pattern of cortisol elevation. Vegetable shortening was found to be a more suitable vehicle for long-term cortisol elevation [elevated at 3, 6 and 9 days post treatment (dpt)], while cocoa butter may be better suited for short-term cortisol elevation (only elevated at 3 dpt). Additionally, plasma cortisol levels were higher with cortisol-vegetable shortening than with cortisol-cocoa butter implants. Plasma glucose levels were elevated 6 and 9 dpt for fishes injected with cortisol-vegetable shortening, but did not change relative to controls and shams in cortisol-cocoa butter fishes. In conclusion, vegetable shortening and cocoa butter are both viable techniques for cortisol manipulation in fishes in temperate climates, providing researchers with different options depending on study objectives. |
| Databáze: | OpenAIRE |
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