| The Shannon River
The Shannon River is the largest and longest river in Ireland
and Great Britain. The source of the river is ascribed to the
Shannon Pot in the Cuilcagh Mountains on the Cavan-Fermanagh
border. The Pot is 152 m above seawater. The fishing rights of
the entire river are vested in the Electricity Supply Board (ESB)
whose essential role is to maintain and preserve the Atlantic
salmon and European eel.
The Shannon catchment area, including the sub-catchments of
the Inny, Suck and Fergus is the largest in Ireland, occupying
some 15,000 km or about 17% of the total area of the country.
The River Shannon is broad and slow flowing for much of its 344
km (214 miles) from its source to Loop Head where it joins the
Atlantic Ocean, discharging 6 cubic kilometres of water each
year into the sea. Its tributaries lie in 12 counties, expanding
to form some of Irelands largest lakes-Allen, Ree and Derg. In
its first 14 km (8.7 miles) to Lough Allan it drops 104 meter
and then only about 12 m in the 185 km (115 miles) between Lough
Allen and Killaloe. In the final 29 km (18 miles) to Limerick it
drops a further 30 m before entering the estuary, which runs a
further 83 km (52 miles) to the open Atlantic, which is tidal.
Wildlife of the Shannon Basin
Although the Shannon River wetlands harbour many interesting
forms of wildlife such as otter and wild geese, swans, waders
and gulls. In winter, the numbers increase with white fronted
geese from Greenland and golden plover from Scandinavia. In
spring the waters are invaded by local breeding birds, the
redshank, snipe, lapwing and blacktailed godwit. Permanent
residents include, the coot, moorhen and little grebe or
dabchick. Ducks, mallard and tufted duck are the most common.
Teal, shovellers and red-breasted mergansers are less common The
gray heron is also plentiful. In the reeds are found the
abundant bunting. Summer visitors include many species of
warbler, the corncrake, swifts, swallows, house martins, and
sand martins. Although there is not much love lost between the
anglers and the cormorants, the devils black pigeon they have
little impact on fish stocks.
The most sought after wildlife however are the game and
abundant course fish. The game fish:- salmon and trout can
be found, but since the construction of the hydro-electric
station at Ardnacrusha in the 1920's only an occasional salmon
is caught and a licence is required to fish for Salmon. Char (or
charr, Salvellinus alpinus) a 'glacial relict' is a species
which occurred in Ireland during the cold condition of the Ice
Age can only be found is a few places. The Char is extinct in
the Shannon system, and an endangered species, but is being
reintroduced and farmed in Lough Corrib. Many other fish live in
its waters, which provide some of the best course fishing in
Europe. The big waters of Lough Allan have a richness of fish.
The shallow narrow Lough Allen canal and Acres Lake have a
plentiful supply of roach, small beam and some tench. Lough Derg
stocks golden coloured rudd, which are a shy fish. At the
confluence of the river Suck and Shannon the deep water is the
home for specimen rudd-bream hybrids. The fish found in the
Shannon River are outlined below. Pike, perch and bream are
important anglers fish in the Shannon and its tributaries. Trout
and coarse fish (pike, perch and bream) have been introduced to
the river by man. The Normans introduced pike in the 12th
century and the most recent arrival, the roach entered the
Shannon from the Inny. The river also holds stock of freshwater
crayfish and many smaller fish species e.g. minnow, stone loach,
sticklebacks, gudgeon and lamprey as well as pollan in Lough Ree
and Lough Derg a silvery herring like relative.
Fish of the River Shannon.
| Fish |
Description |
| Salmon- |
An 'anadromous fish' one which breads in
freshwater but goes to sea to find the greater part of
its food and returns to freshwater to breed. |
BrownTrout-
(Salmon trutta) |
Large fish found in the lakes rather than
the river. Predators of the brown trout include the
pike. |
Eels-
(Anguilla anguilla) |
Common throughout - the Eels are a
migratory species, females measure up to 90 cm: males to
about 40 cm. They stay in fresh water for about 20
years, feeding on invertebrates and sometimes-small
fish. |
Pike-
(Esox lucius) |
Fast growing and long lived fish eater,
but also feeds on frogs and water birds. |
Perch-
(Perca fluviatilis) |
A handsome fish found in slow moving
rivers, lakes and large pools. They congregate in shoals
and feed on small fish, insects and shellfish. |
Rudd-
(Scardinius eerythrophthalmus) |
Very colourful fish, normally 15-30 cm
long, which interbreeds with bream or roach to produce
hybrids. They eat beetles, water snails, larvae and
plants. |
Bream-
(Abraamis brama) |
The commonest course fish, found in deep
water. A member of the Carp family it sucks small worms
and larvae from the muddy bottom of the river. |
|
Roach-
(Rutilus rutilus)
|
Prolific breeders and can overrun a
system. They live in both still and running water. They
swim in shoals usually feeding near the bottom on weeds,
larvae (grubs) and shellfish. They look like and breed
with rudd. |
Roach-
Bream Hybrid |
|
Rudd-
Bream Hybrid |
|
Source: Shannon Regional Fisheries Board and Irish
Specimen Fish Committee 1999
|