Displaying items by tag: DNA

19th February 2012

Results of Genetic Studies of Brown Trout Stocks in Suir and Boyne Catchments

#INLAND WATERWAYS - Inland Fisheries Ireland (IFI) has announced the results of studies on the genetic makeup of brown trout stocks in the Suir and Boyne river catchments.

These studies form part of a wider scheme looking at Ireland's larger riverine catchments - assisted by the Office of Public Works, geneticists from UCD and trout anglers across Ireland - and involve a chemical analysis of scale samples from fish known as 'micro-satellite DNA analysis'.

The results from the Suir and Boyne are described by IFI as "quite amazing" and "of significant value" to managing the fisheries in these areas.

In both catchments, the first step saw trout stock samples of young fish examined genetically, and they were shown to be discrete - in other words, fish from any given tributary were found to be genetically different to those from others.

The next step involved samples of adult fish from the main river, contributed by anglers, which were then related to the different tributary genetic types.

Summary results from the Suir and Boyne show that there are respectively seven and five distinct families of trout in the catchment area; that most fish born in tributaries migrate to the main stem till adulthood before returning to their tributaries to spawn; that numbers migrating from individual tributaries are variable, but fish don't cross into adjacent catchment areas; and that there movement of young trout along the river system is "extraordinary", with fish often migrating from near the source to the mouth.

More details on findings for the Suir catchment and Boyne catchment are available on the IFI website.

Published in Inland Waterways

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About the Loughs Agency

The Loughs Agency is a governmental body established under the 1998 Agreement between the Government of the United Kingdom of Great Britain and Northern Ireland and the Government of Ireland. The Agency's goal is to provide sustainable social, economic, and environmental benefits by effectively conserving, managing, promoting, and developing the fisheries and marine resources of the Foyle and Carlingford areas.

The Agency's governing legislation confers several specific functions, including the promotion of development of Lough Foyle and Carlingford Lough for commercial and recreational purposes in respect of marine, fishery, and aquaculture matters. Moreover, the Agency is responsible for managing, conserving, protecting, improving, and developing the inland fisheries of the Foyle and Carlingford areas. Additionally, the Agency has the task of developing and licensing aquaculture, as well as the development of marine tourism.

The Loughs Agency reports to the North South Ministerial Council and its government Sponsor Departments, the Department of Agriculture, Environment and Rural Affairs (DAERA) in Northern Ireland, and the Department of the Environment, Climate, and Communications (DECC) in Ireland. The Departments fund the Agency on an equal basis.

The Loughs Agency's focus on sustainable development is expected to have a positive impact on the economy, environment, and local communities in the Foyle and Carlingford areas. The Agency's efforts to conserve and enhance the region's marine resources, including fisheries and aquaculture, are expected to benefit local communities, promote tourism, and contribute to economic growth.

In conclusion, the Loughs Agency plays a vital role in promoting the sustainable social, economic, and environmental development of the Foyle and Carlingford areas. Its work on marine conservation and development is crucial in ensuring the long-term viability of the region's natural resources and in promoting sustainable economic growth.