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#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

Whether you're a boat enthusiast, historian, archaeologist, fisherman, or just taken by the natural beauty of Ireland's waterways, you will find something of interest in our Inland pages on Afloat.ie.

Inland Waterways

Ireland is lucky to have a wealth of river systems and canals crossing the country that, while once vital for transporting goods, are today equally as important for angling, recreational boating and of course tourism.

From the Barrow Navigation to the Erne System, the Grand Canal, the Lower Bann, the Royal Canal, the Shannon-Erne Waterway and the Shannon Navigation, these inland waterways are popular year in, year out for anyone with an interest in rambling; flora and fauna; fishing; sailing; motorboating; canoeing, kayaking and waterskiing; and cruising on narrowboats.

Although most will surely identify Ireland's inland waterways with boating holidays and a peaceful afternoon's angling, many varieties of watersport are increasingly favoured activities. Powerboat and Jetski courses abound, as do opportunities for waterskiing or wakeboarding. For those who don't require engine power, there's canoeing and kayaking, as Ireland's waterways have much to offer both recreational paddlers and those looking for more of a challenge. And when it comes to more sedate activities, there's nothing like going for a walk along a canal or river bank following some of the long-distance Waymarked Ways or Slí na Sláinte paths that criss-cross the country.

Ireland's network of rivers, lakes and canals is maintained by Waterways Ireland, which is one of the six North/South Implementation Bodies established under the British-Irish Agreement in 1999. The body has responsibility for the management, maintenance, development and restoration of inland navigable waterways on the island of Ireland, principally for recreational purposes. It also maintains Ireland's loughs, lakes and channels which are sought after for sailing; the network of canal locks and tow paths; as well as any buoys, bridges and harbours along the routes.

Along the Grand and Royal Canals and sections of the Barrow Navigation and the Shannon-Erne Waterway, Waterways Ireland is also responsible for angling activities, and charges Inland Fisheries Ireland with carrying out fisheries development, weed management and ensuring water quality.

Brian Goggin's Inland Blog

Giving his personal perspective on Ireland's Inland Waterways from present-day activities to their rich heritage, Brian Goggin tells it like it is with his Inland Blog.

From recognising achievements in management of the waterways to his worries on the costs of getting afloat on Ireland's canals, Goggin always has something important to say.

He also maintains the website Irish Waterways History that serves as a repository for a wealth of historical accounts of the past commercial and social uses alike of Ireland's rivers and canals, which were once the lifeblood of many a rural community.