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  • Seasonal and sex-related variations in serum steroid hormone levels in wild and farmed brown trout Salmo trutta L. in the north-west of Spain.

Seasonal and sex-related variations in serum steroid hormone levels in wild and farmed brown trout Salmo trutta L. in the north-west of Spain.

Journal of water and health (2013-12-18)
Juan M Fregeneda-Grandes, Salvador Hernández-Navarro, Ignacio A Fernandez-Coppel, Adriana Correa-Guimaraes, Norlan Ruíz-Potosme, Luis M Navas-Gracia, J Miguel Aller-Gancedo, Francisco J Martín-Gil, Jesús Martín-Gil
ZUSAMMENFASSUNG

Serum steroid profiles were investigated in order to evaluate the potential use of circulating sex steroid levels as a tool for sex identification in brown trout. Changes in the serum concentrations of testosterone (T), progesterone (P), 17-β-estradiol (E2), and cortisol (F) in wild and farmed mature female and male brown trout, Salmo trutta L., were measured in each season (January, May, July, and October) in six rivers and four hatcheries located in the north-west of Spain. Serum cortisol levels in farmed brown trout were significantly higher and showed a seasonal pattern opposite to that found in wild trout. Because levels of the hormones under study can be affected by disruptive factors such as exposure to phytoestrogens (which alters the hypothalamic-pituitary-gonadal axis) and infection with Saprolegnia parasitica (which alters the hypothalamic-pituitary-adrenal axis), both factors are taken into account.

MATERIALIEN
Produktnummer
Marke
Produktbeschreibung

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β-Estradiol, BioReagent, powder, suitable for cell culture
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β-Estradiol, ≥98%
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Progesteron, powder, BioReagent, suitable for cell culture
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Progesteron, ≥99%
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β-Estradiol, powder, γ-irradiated, suitable for cell culture
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Testosteron, purum, ≥99.0% (HPLC)
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β-Estradiol, meets USP testing specifications
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Testosterone solution, 1.0 mg/mL in acetonitrile, ampule of 1 mL, certified reference material, Cerilliant®
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17β-Estradiol -Lösung, 1.0 mg/mL in acetonitrile, ampule of 1 mL, certified reference material, Cerilliant®
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Progesteron, meets USP testing specifications
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Progesteron, γ-irradiated, BioXtra, suitable for cell culture
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Progesterone solution, 1.0 mg/mL in acetonitrile, ampule of 1 mL, certified reference material, Cerilliant®
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β-Estradiol, analytical standard
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Progesteron, Pharmaceutical Secondary Standard; Certified Reference Material
Estradiol Hemihydrat, European Pharmacopoeia (EP) Reference Standard
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Testosteron, VETRANAL®, analytical standard
Testosteron, European Pharmacopoeia (EP) Reference Standard
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Progesteron, VETRANAL®, analytical standard