Action

Domestication: sterility/triploidy

How is the evidence assessed?
  • Effectiveness
    not assessed
  • Certainty
    not assessed
  • Harms
    not assessed

Source countries

Key messages

  • A controlled, replicated study in Ireland found reduced return of stock but similar weight, length and condition of triploid salmon compared with diploid salmon.

 

About key messages

Key messages provide a descriptive index to studies we have found that test this intervention.

Studies are not directly comparable or of equal value. When making decisions based on this evidence, you should consider factors such as study size, study design, reported metrics and relevance of the study to your situation, rather than simply counting the number of studies that support a particular interpretation.

Supporting evidence from individual studies

  1. A controlled, replicated experiment in Ireland in 1996 (Cotter et al., 2000) found reduced return of triploid salmon compared to diploid salmon to coast and fresh water sites after release. The ranched, mixed sex diploid group of salmon showed the highest percentage return to fresh water (2.25%). Across the three release groups, the percentage return of triploid mixed-sex and all female stocks (0.81 and 0.75) was significantly lower than diploid mixed-sex and all female stocks (3.42 and 3.95). Weight, length and condition factor were similar between triploid and diploid coastal return fish. Groups of mixed-sex and all female salmon stocks were produced and triploidy was induced in a proportion of fertilised ova in February. Groups of both diploid and triploid mixed-sex and all female fish were released from two sites on the western coast of Ireland; a tidal lake by a hatchery and next to a commercial aquaculture operation on the coast. Capture location and return data of the groups was gathered as part of an on-going Irish programme. Fifteen major salmon landing ports were monitored between May and June 1996.

    Study and other actions tested
Please cite as:

Jones, A.C., Mead, A., Austen, M.C.V.  & Kaiser, M.J. (2013) Aquaculture: Evidence for the effects of interventions to enhance the sustainability of aquaculture using Atlantic salmon (Salmo salar) as a case study. Bangor University

 

Where has this evidence come from?

List of journals searched by synopsis

All the journals searched for all synopses

Sustainable Aquaculture

This Action forms part of the Action Synopsis:

Sustainable Aquaculture
Sustainable Aquaculture

Sustainable Aquaculture - Published 2013

Atlantic salmon Aquaculture Synopsis

What Works in Conservation

What Works in Conservation provides expert assessments of the effectiveness of actions, based on summarised evidence in synopses. Subjects covered so far include amphibians, birds, terrestrial mammals, forests, peatland and control of freshwater invasive species. More are in progress.

More about What Works in Conservation

Download free PDF or purchase
The Conservation Evidence Journal

The Conservation Evidence Journal

An online, free to publish in, open-access journal publishing results from research and projects that test the effectiveness of conservation actions.

Read latest volume: Volume 17

Go to the CE Journal

Subscribe to our newsletter

Please add your details if you are interested in receiving updates from the Conservation Evidence team about new papers, synopses and opportunities.

Who uses Conservation Evidence?

Meet some of the evidence champions

Endangered Landscape Programme Red List Champion - Arc Kent Wildlife Trust The Rufford Foundation Save the Frogs - Ghana Bern wood Supporting Conservation Leaders National Biodiversity Network Sustainability Dashboard Frog Life The international journey of Conservation - Oryx British trust for ornithology Cool Farm Alliance UNEP AWFA Butterfly Conservation People trust for endangered species Vincet Wildlife Trust