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  • Effect of elevated temperature on estrogenic induction of vitellogenesis and zonagenesis in juvenile Atlantic salmon (Salmo salar)

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    Author(s)
    Anderson, Kelli
    King, Harry
    Pankhurst, Ned
    Ruff, Nicole
    Pankhurst, Patricia
    Elizur, Abigail
    Griffith University Author(s)
    Pankhurst, Ned W.
    Pankhurst, Patricia
    Year published
    2012
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    Abstract
    Fertility and embryo survival rates are often low in eggs from thermally challenged Tasmanian Atlantic salmon, partly due to a reduction in plasma 17߭estradiol (E2) levels. We used juvenile Atlantic salmon to assess whether hepatic tissue remains responsive to stimulation by E2 at the higher temperatures sometimes encountered by Tasmanian salmon during summer. E2 administration stimulated vitellogenin (Vtg) and estrogen receptor alpha transcription at 14àand 22ì although induction of Vtg occurred more rapidly at 22î Consequently, plasma Vtg levels increased and reached a plateau more quickly at 22î Zona pellucida (Zp) B and ...
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    Fertility and embryo survival rates are often low in eggs from thermally challenged Tasmanian Atlantic salmon, partly due to a reduction in plasma 17߭estradiol (E2) levels. We used juvenile Atlantic salmon to assess whether hepatic tissue remains responsive to stimulation by E2 at the higher temperatures sometimes encountered by Tasmanian salmon during summer. E2 administration stimulated vitellogenin (Vtg) and estrogen receptor alpha transcription at 14àand 22ì although induction of Vtg occurred more rapidly at 22î Consequently, plasma Vtg levels increased and reached a plateau more quickly at 22î Zona pellucida (Zp) B and C transcription was significantly lower in E2-treated fish at 22àrelative to 14î This shows that the Vtg gene is E2-responsive at high temperature unlike Zp B and C genes that displayed traits of thermal inhibition. Therefore, estrogen replacement therapy in adult salmon may offset some, but not all thermal inhibition of reproductive function.
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    Journal Title
    Marine and Freshwater Behaviour and Physiology
    Volume
    45
    Issue
    1
    DOI
    https://doi.org/10.1080/10236244.2012.670472
    Copyright Statement
    © 2012 Taylor & Francis. This is an electronic version of an article published in Marine and Freshwater Behaviour and Physiology, Volume 45, Issue 1, 2012, Pages 1-15. Marine and Freshwater Behaviour and Physiology is available online at: http://www.informaworld.com with the open URL of your article.
    Subject
    Biological sciences
    Ecological physiology
    Publication URI
    http://hdl.handle.net/10072/46890
    Collection
    • Journal articles

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