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Control of sex inversion in female Atlantic salmon (Salmo salar)

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Lee, Peter Stephen (2004) Control of sex inversion in female Atlantic salmon (Salmo salar). PhD thesis, University of Tasmania.

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Abstract

Commercial production of Atlantic salmon, Salmo solar (L.), in Tasmania is
becoming increasingly reliant on female stocks for year round production.
Hatchery production of female monosex stocks uses milt from sex inverted
females ("neomales") to produce all female offspring. This study was undertaken
investigate the effects of aromatase inhibitors (Al) on Atlantic salmon and to
facilitate the development of techniques for their commercial application.
Dietary treatment for 800 °C days from first feeding, with methyltestosterone at
doses of 1 or 3 mg kg -1 food or methyldihydrotestosterone (MDHT) at 1 mg kg -1
food resulted in 100% masculinisation of female Atlantic salmon. Masculinisation
followed 2 h immersion of alevins in MDHT at 400 p.g 11 during the period 0 to
28 days post median hatch (DPMH) and complete masculinisation was achieved
after immersion at 14 and 21 or 14 and 28 DPMH. More sex inverted males with
patent sperm ducts were produced by immersion than dietary treatments. These studies demonstrate the commercial feasibility of androgens and AT for sex
inversion of Atlantic salmon. The efficacy of immersion treatment with AT is
dependent on both enzyme inhibition and the uptake and retention characteristics
of AI.

Item Type: Thesis (PhD)
Keywords: Atlantic salmon, Sex differentiation
Copyright Holders: The Author
Additional Information:

Thesis (PhD.)--University of Tasmania, 2005. Includes bibliographical references

Date Deposited: 19 Dec 2014 02:47
Last Modified: 11 Mar 2016 05:54
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