Inland Fisheries Ireland (IFI) says it is investigating a “significant” fish kill incident on the Crover River in Co Cavan, which is a tributary of Lough Sheelin.

Officers from the Shannon River Basin District became aware of the incident late on Friday evening (12 August).

And IFI estimates that there could be in excess of 1,000 juvenile trout killed in the incident, covering a 1.5 km stretch of water.

Other aquatic species were also found dead, such as crayfish, lamprey, stone loach and invertebrates.

IFI says is not in a position to confirm the cause of the fish kill while investigations are ongoing.

Previously the State agency responsible for the protection and conservation of freshwater fish and habitats warned of a high risk of fish kills due to thermal stress and reduced oxygen levels in lakes and rivers amid the recent heatwave.

With Met Éireann forecasting a heat wave for large parts of the country into this weekend, combined with lower-than-average rainfall, Inland Fisheries Ireland (IFI) is warning that there is a high risk of fish kills due to thermal stress and reduced oxygen levels in lakes and rivers.

Also known as deoxygenation, reduced oxygen levels in a river or lake make it very difficult for fish to breathe and survive.

The State agency responsible for the protection and conservation of freshwater fish and habitats is concerned that water levels in many rivers are low and approaching drought conditions.

Therefore, it is appealing to anglers, the farming community and the general public to report any sightings of fish under thermal stress, which may be caused by the extreme heat combined with low water levels and other pressures.

Anglers are also being asked to voluntarily stop using ‘keep nets’ while high temperature warnings from Met Éireann are in place, as these nets may cause unintentional distress to fish.

In addition, anglers that practice ‘catch and release’ fishing are asked not to fish during the heat wave where possible, as this may put undue pressure on fish populations.

Dr Gregory Forde, head of operations at IFI explains: “Unfortunately low water levels and high water temperatures can lead to fish kills, especially as there is less oxygen in the water to allow fish to breathe.

‘During the current heat wave, air and water temperatures are approaching dangerous levels and fish kills may be unavoidable’

“Once the water temperature exceeds 20C, fish species such as salmon and trout suffer ‘thermal stress’. During the current heat wave, air and water temperatures are approaching dangerous levels and fish kills may be unavoidable. In some instances, moving fish in and out of the water may also prove too stressful. 

“That’s why we’re asking anglers practicing catch and release fishing to consider taking a break from fishing while high temperature warnings are in place. We’re also asking anglers to voluntarily stop using ‘keep nets’ until conditions become more favourable.”

Last month, IFI and the Office of Public Works’ data buoy recorded a surface water temperature of 21.84C at Lough Sheelin in Co Cavan, coinciding with July’s hottest air temperature of 30.75C. 

IFI notes that significant thermal stress can occur in brown trout and other cold water fish species at temperatures at or above 20C.

Forde said: “Inland Fisheries Ireland staff are continuously monitoring water bodies, such as rivers and lakes, for any signs of fish suffering thermal stress in shallow water or drying out rivers and streams.

“We’re encouraging the public to report any sightings of fish suffering thermal stress to our 24-hour confidential hotline on 0818 34 74 24 so we can respond as quickly as possible to help rescue or relocate these fish.

“It is also a good time to remind all those using pesticides that these should be used only as a last resort, always in accordance with product instructions and always respecting statutory ‘no use’ zones, being mindful at all times of proximity to water bodies such as ditches, streams, ponds, rivers, lakes and springs. Even a very small amount of pesticide can be highly toxic to the aquatic environment.”

‘Many of our fish species will find survival difficult in these warm conditions without the added pressure of angling stress’

Elsewhere, the Loughs Agency is advising anglers across both the Foyle and Carlingford catchments to help preserve salmon and trout stocks in local rivers following prolonged periods of hot weather.

These extreme weather conditions have led to low river flows, high water temperatures and low oxygen levels in many bodies of water.

The guidance comes after only 43% of the average rainfall fell in Northern Ireland last month, although some rivers in the Foyle catchment also experienced severe flooding. Each one of these significant weather events put stress on fish.

The agency’s head of science Dr Sarah McLean is hopeful that anglers will proceed with caution on the rivers, particularly when fishing in the current warm temperatures.

“Many of our fish species will find survival difficult in these warm conditions without the added pressure of angling stress,” she said.

“Even catch and release poses a risk in these conditions as low dissolved oxygen in the water can result in poor fish recovery rates and inadvertent mortalities.

“It is also worth remembering that high water temperatures and low dissolved oxygen levels may also leave fish more susceptible to parasites and disease, so any fish caught will also require additional care when handling.”

There are several measures anglers in Foyle and Carlingford can take to help protect fish during the hot weather:

• Consider taking the water temperature before you fish and avoid fishing at times when water temperatures are high. Water temperature will be coolest in the early morning.
• Where possible, keep fish in the water during catch and release.
• Seek advice from fishery or angling clubs where appropriate.
• Avoid targeting larger fish or sensitive species.
• Keep nets should not be used by coarse anglers during warm weather.
• Limit handling time.
• Where possible and safe, release fish into deeper, faster flowing water. 

Anglers should report distressed or dead fish in the Foyle or Carlingford catchments directly and promptly to the Loughs Agency at +44 (0)28 71 342100 or [email protected].

Inland Fisheries Ireland (IFI) says it is investigating a "significant" fish kill on the River Erkina near Rathdowney in Co Laois earlier this month. 
 
Environmental and fisheries officers from the South-Eastern River Basin District were alerted to the incident by a member of the public on Wednesday 20 July.
 
The State agency responsible for the protection and conservation of freshwater fish and habitats estimates that there could be in excess of 2,000 trout killed in the incident, in addition to other species such as salmon parr, lamprey and crayfish.

IFI notes that fish species in the Erkina are very vulnerable currently due to higher water temperatures and lower water levels at this time of year. If there is less oxygen in the water, fish find it extremely difficult to survive as a result.

Local anglers have expressed their dismay, with Rory Maher of Rathdowney Angling Club telling the Leinster Express that the incident has ended their 2022 season and may already rule out fishing in 2023.

“It is not just fishing impacted, it’s all the wildlife on the river, like ducks, herons, egrets, kingfishers — the whole ecosystem has been affected,” the club’s secretary Maher said.

Investigations into this fish kill incident are ongoing and IFI says is not in a position to comment on the cause at this stage.

Inland Fisheries Ireland (IFI) says it is investigating a recent fish kill incident recorded on the Ballinagh River in Co Cavan.

Environmental and fisheries officers from the North-Western River Basin District were alerted to the incident by a member of the public on the evening of Tuesday 19 July.

Water samples were taken at the location and removed for scientific analysis.

The State agency responsible for the protection and conservation of freshwater fish and habitats estimates that in excess of 150 fish were killed in the incident, including brown trout, stickleback and minnow.

IFI adds that as investigations are ongoing, it is not in a position to comment on the cause of the fish kill at this stage, pending further analysis of samples taken.

Dr Milton Matthews, director of the North-Western River Basin District with IFI acknowledged the ongoing support of the public in reporting suspected cases of water pollution and fish kills.

“We are grateful to the member of the public who reported this incident to us so promptly, which enabled our team to take immediate action and start our investigation without delay,” he said.

“Early notice is very often critical in determining the underlying cause of fish kill events, such as this one on the Ballinagh River.”

Members of the public are encouraged to call IFI’s new confidential 24-hour hotline number on 0818 34 74 24 to report any sightings of fish kills or suspected water pollution.

Meanwhile in Northern Ireland, the Loughs Agency has confirmed a fish kill on the River Mourne in Strabane, Co Tyrone where a number of dead adult salmon were discovered in the river’s lower stretch.

“Fishery officers are currently attempting to recover a number of dead fish to allow investigation,” the agency says.

“The cause at this moment is unknown. Officers at this time do not wish to speculate, but high-water temperatures and ambient air temperatures can result in conditions in our rivers that may be unfavourable to fish.

“Anyone recovering a dead fish should contact the Loughs Agency 24-hour response number on +44 287 134 2100.”

A slurry spill in a Co Tyrone river has “wiped out” thousands of salmonids in a major fish kill, as BelfastLive reports.

The incident was discovered at the weekend on the River Torrent, which leads to the Coalisland Canal, with a local councillor describing a “dead zone” between the villages of Newmills and Clonoe.

“I am very angry and depressed to be honest,” Mid Ulster SDLP councillor Malachy Quinn said. “The amount of work that people have put into the Torrent and the canal, building up the wildlife... and all of a sudden it’s just literally wiped out in a matter of hours.”

1000s of fish killed at the Coalisland Canal/Torrent River. The knock on effect will have a devastating impact on the local wildlife which has taken years to build up. Kingfishers, otters, insects which may now not return. pic.twitter.com/LDWWEskaRG

— Malachy Quinn (@MalachyQuinn) June 21, 2022

A spokesperson for Northern Ireland’s Department of Agriculture, Environment and Rural Affairs (DAERA) confirmed that it has begun a joint investigation with the Northern Ireland Environment Agency.

“The source has been identified and NIEA are currently working with the premises involved to identify what further measures can be employed to mitigate the impact of the spillage on the Torrent River,” the spokesperson added.

BelfastLive has more on the story HERE.

Inland Fisheries Ireland (IFI) says it is investigating a serious fish kill incident at the River Rye in Leixlip, Co Kildare.

Environmental and fisheries officers from the Eastern River Basin District in Dublin were alerted to the incident on the evening of Wednesday 8 June.

Water and fish samples were taken from the scene and removed for scientific analysis at an independent laboratory.

IFI estimates that there could be in excess of 500 mortalities of brown trout plus other fish species in the impacted area covering approximately 2km of river.

Investigations are ongoing and IFI, the State agency responsible for the protection and conservation of freshwater fish and habitats, says it is not in a position to comment on the cause of the fish kill at this stage, pending further analysis of samples taken.

The River Rye (or Ryewater) is an important spawning river for brown trout and a key spawning channel for a highly sensitive population of Atlantic salmon within the River Liffey catchment area.

To report fish kills, members of the public are encouraged to call IFI’s confidential 24-hour hotline number on 0818 34 74 24.

Anglers in Northern Ireland have described a “massacre” on a Co Tyrone river after a slurry spill resulted in a major fish kill incident, prompting an official investigation into the source.

The spill on the Claggan River was discovered last weekend with Ballinderry Rivers Trust reporting that “thousands of litres of slurry” were moving downstream to the Killymoon River near Cookstown.

According to Coagh Angling Club, a “massacre” of fish — including young salmon and native dollaghan, as well as breeding and baby trout and eggs — was witnessed several miles upstream of its waters.

On Tuesday (29 March) another incident was reported on a tributary above Coagh weir, where the waters appeared “green with slurry”.

The club’s John Hagan told the Belfast Telegraph that it will take years to recover from the environmental damage.

“We don’t know the full environmental impact of it just yet, but we do know that there's probably about 12-15 miles of river near the source of the Ballinderry which is just dead,” he said.

The Belfast Telegraph has more on the story HERE.

Inland Fisheries Ireland (IFI) is investigating a serious fish kill incident at the Glore River in Kiltimagh, Co Mayo.

Environmental and fisheries officers from the Western River Basin District in Ballina were alerted to the incident on Friday 3 September.

Water and fish samples were taken from the scene and removed for scientific analysis at an independent laboratory.

IFI, the State agency responsible for the protection and conservation of freshwater fish and habitats, estimates that there could be in excess of 500 mortalities of young salmon and trout.

Investigations are ongoing and IFI says it not in a position to comment on the cause of the fish kill at this stage, pending further analysis of samples taken.

The Glore is described as an important spawning river for trout and salmon within the Moy catchment area.

This incident comes just says after Northern Ireland experienced its third fish kill in as many months — two of them on the same river in Co Antrim.

Northern Ireland’s inland waters have seen a third fish kill in as many months after hundreds of dead trout were found in a Co Fermanagh river, as BBC News reports.

The grim discovery in the Kesh River on Wednesday (1 September) comes just days after the Three Mile Water in Co Antrim was struck by its second fish kill incident of this summer.

Ian Grimsley of Kesh and District Angling Club said the incident — which claimed not only brown trout and river trout but juvenile salmon, perch and more — was the worst of its kind he had witnessed in the area in 40 years.

And like last week’s fish kill in Newtownabbey, he fears “it’ll take years to bring it back again”.

The Northern Ireland Environment Agency (NIEA) has launched an investigation, with the origin of the river pollutant as yet unknown. BBC News has more on the story HERE.

Co Antrim’s Three Mile Water has been afflicted by a second fish kill this summer — and a local angling group says it could take years to recover.

The Belfast Telegraph reports on the incident which was discovered on the river at Monkstown on Friday afternoon (27 August).

Trout, eels and even flounder that swim upstream from Belfast Lough are among the species affected in what the Three Mile Water Conservation and Angling Association has branded a “major fish kill”.

It comes less than three months after hundreds of trout were believed to have been killed on the same river in an incident the cause of which has not been identified.

The Belfast Telegraph has more on the story HERE.