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

Citation

Anderson, K and King, H and Pankhurst, N and Ruff, N and Pankhurst, P and Elizur, A, Effect of elevated temperature on estrogenic induction of vitellogenesis and zonagenesis in juvenile Atlantic salmon (Salmo salar), Marine and Freshwater Behaviour and Physiology, 45, (1) pp. 1-15. ISSN 1023-6244 (2012) [Refereed Article]


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DOI: doi:10.1080/10236244.2012.670472

Abstract

Fertility and embryo survival rates are often low in eggs from thermally challenged Tasmanian Atlantic salmon, partly due to a reduction in plasma 17β-estradiol (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 14C and 22C, although induction of Vtg occurred more rapidly at 22C. Consequently, plasma Vtg levels increased and reached a plateau more quickly at 22C. Zona pellucida (Zp) B and C transcription was significantly lower in E2-treated fish at 22C relative to 14C. 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.

Item Details

Item Type:Refereed Article
Keywords:salmon, Salmo salar, temperature, vitellogenin, zona pellucida, estrogen therapy
Research Division:Agricultural and Veterinary Sciences
Research Group:Fisheries Sciences
Research Field:Aquaculture
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - Aquaculture
Objective Field:Aquaculture Fin Fish (excl. Tuna)
Author:Anderson, K (Miss Kelli Anderson)
ID Code:127617
Year Published:2012
Web of Science® Times Cited:5
Deposited By:Fisheries and Aquaculture
Deposited On:2018-08-06
Last Modified:2018-08-06
Downloads:0

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