Preliminary Assessment of Sex Inversion of Farmed Atlantic Salmon by Dietary and Immersion Androgen Treatments
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 d...
Published in: | North American Journal of Aquaculture |
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crwiley:10.1577/a03-015 2024-09-15T17:55:56+00:00 Preliminary Assessment of Sex Inversion of Farmed Atlantic Salmon by Dietary and Immersion Androgen Treatments Lee, Peter King, Harry Pankhurst, Ned University of Tasmania 2004 http://dx.doi.org/10.1577/a03-015 https://afspubs.onlinelibrary.wiley.com/doi/pdf/10.1577/A03-015 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor North American Journal of Aquaculture volume 66, issue 1, page 1-7 ISSN 1522-2055 1548-8454 journal-article 2004 crwiley https://doi.org/10.1577/a03-015 2024-07-09T04:10:34Z 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. Article in Journal/Newspaper Atlantic salmon Salmo salar Wiley Online Library North American Journal of Aquaculture 66 1 1 7 |
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Wiley Online Library |
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English |
description |
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. |
author2 |
University of Tasmania |
format |
Article in Journal/Newspaper |
author |
Lee, Peter King, Harry Pankhurst, Ned |
spellingShingle |
Lee, Peter King, Harry Pankhurst, Ned Preliminary Assessment of Sex Inversion of Farmed Atlantic Salmon by Dietary and Immersion Androgen Treatments |
author_facet |
Lee, Peter King, Harry Pankhurst, Ned |
author_sort |
Lee, Peter |
title |
Preliminary Assessment of Sex Inversion of Farmed Atlantic Salmon by Dietary and Immersion Androgen Treatments |
title_short |
Preliminary Assessment of Sex Inversion of Farmed Atlantic Salmon by Dietary and Immersion Androgen Treatments |
title_full |
Preliminary Assessment of Sex Inversion of Farmed Atlantic Salmon by Dietary and Immersion Androgen Treatments |
title_fullStr |
Preliminary Assessment of Sex Inversion of Farmed Atlantic Salmon by Dietary and Immersion Androgen Treatments |
title_full_unstemmed |
Preliminary Assessment of Sex Inversion of Farmed Atlantic Salmon by Dietary and Immersion Androgen Treatments |
title_sort |
preliminary assessment of sex inversion of farmed atlantic salmon by dietary and immersion androgen treatments |
publisher |
Wiley |
publishDate |
2004 |
url |
http://dx.doi.org/10.1577/a03-015 https://afspubs.onlinelibrary.wiley.com/doi/pdf/10.1577/A03-015 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
North American Journal of Aquaculture volume 66, issue 1, page 1-7 ISSN 1522-2055 1548-8454 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1577/a03-015 |
container_title |
North American Journal of Aquaculture |
container_volume |
66 |
container_issue |
1 |
container_start_page |
1 |
op_container_end_page |
7 |
_version_ |
1810432150433955840 |