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Preliminary Assessment of Sex Inversion of Farmed Atlantic Salmon by Dietary and Immersion Androgen Treatments

Citation

Lee, PS and King, H and Pankhurst, NW, Preliminary Assessment of Sex Inversion of Farmed Atlantic Salmon by Dietary and Immersion Androgen Treatments, North American Journal of Aquaculture , 66, (1) pp. 1-7. ISSN 1522-2055 (2004) [Refereed Article]

DOI: doi:10.1577/A03-015

Abstract

Dietary and immersion treatments with the androgens 17α- methyltestosterone (MT) and 17α-methyldihydrotestosterone (MDHT) were assessed for their efficacy in the masculinization of Atlantic salmon Salmo salar. Dietary treatments with MT at 1 or 3 mg/kg food or MDHT at 1 mg/kg food for 800 degree-days resulted in 100% masculinization of all female stocks. Single or double immersion treatments of alevins in MDHT at 400 μg/L for 120 min during the period 0-28 d after median hatch resulted in significant masculinization. Immersion treatments were most effective when conducted more than 14 d after median hatch. Two immersion treatments 7 or 14 d apart resulted in masculinization levels of up to 100%, whereas single immersions yielded levels up to 77%. Immersion treatment resulted in the production of significantly more sex-inverted males with patent sperm ducts than did dietary treatment. The study shows that immersion treatments are simple and effective for androgen-induced masculinization of Atlantic salmon, that they are suitable for commercial-scale use in hatcheries, and that they offer advantages in production efficiency over dietary treatments.

Item Details

Item Type:Refereed Article
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:Fisheries - Aquaculture not elsewhere classified
UTAS Author:Lee, PS (Mr Peter Lee)
UTAS Author:King, H (Dr Harry King)
UTAS Author:Pankhurst, NW (Professor Ned Pankhurst)
ID Code:31445
Year Published:2004
Web of Science® Times Cited:7
Deposited By:TAFI - Aquaculture
Deposited On:2004-08-01
Last Modified:2005-05-02
Downloads:0

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