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Mass die off of #eels washing up in #LakeChamplain in #Vermont, #USA

Jeff Medor was fishing for bowfin with his sons on Lake Champlain in eastern Alburgh when one of his kids caught something unusual: an American eel.

While that eel looked healthy, that same week they spotted another one on shore, dead.

“And then another one and another one,” he said. “I think we’re up to six here.”

Bernie Pientka, a fisheries biologist with the Vermont Department of Fish and Wildlife, said the state has received reports of 16 dead eels washed up on northern Lake Champlain so far this year — up from one last year.

“It’s not necessarily huge,” he said. “But it’s not a common occurrence.”

The dead eels being reported are larger fish, probably 8 to 10 years old, that seem to be prepping for migration, he said.

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Hundreds of dead #fish and #eels found in #London #canal, #UK

Fish Kill Alert

Hundreds of fish and eels were found dead in one of London’s busiest canals after the heatwave.

Environment Agency teams were called at the weekend after the marine life was spotted on the surface of the Grand Union Canal. About 400 fish were removed from a basin of water near to Kensal Green that included pike, tench, perch and roach.

Tests are being carried out by the Canal & River Trust to find the cause. An Environment Agency spokesman said: “We currently believe the causes were natural following the hot weather, however, at the moment we can’t rule out pollution in the canal.”

Extra oxygen was pumped into the water after the removal operation. Waterways can heat up in summer causing a reduction in oxygen levels.

The canal is also experiencing high levels of duckweed, that can also threaten marine life by depleting sunlight hitting the water and further reducing oxygen levels.

Duckweeds are ladybird-sized flowering aquatic plants that float on the surface of slow-moving water, blanketing it in a green crust. Nearly 800 tons of the suffocating weed have been scooped from London’s waterways by the trust since April as temperatures have risen. Joe Coggins, spokesman for the trust, said: “Our teams working out on the water will continue to monitor for any signs of fish distress and will continue to remove duckweed.

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Hundreds of dead fish, manatees, sea turtles, eels and other marine life wash up in Boca Grande, Florida, USA

Charter boat captain Chris Oneill videotaped those dead manatees, Tuesday, and posted the video to his Facebook page. The video has since been viewed more than a million times and drawn attention to the area’s fish kills.

“I haven’t been able to fish for a week, since mid-last week, because fish started dying and we’re not going to take people out here and subject them to these conditions because there are potential health concerns as well,” Oneill said.

Hundreds of dead fish were crowding Boca Grande’s coastline. Maggots were seen eating the rotting fish, which were emitting a strong odor.

Oneill counted more than 40 endangered Goliath Groupers washed up on the beach this week, ranging from 10 pounds to 400 pounds.

“Black grouper, gag grouper, red grouper, trout, eel, puffer fish, everything you could imagine is right here in this weed line that’s washed up the last couple days,” he said as he pointed out the rotting fish.

Guests were also frustrated by the fish kills. The beach was mostly empty, Wednesday, with the exception of a couple of visitors who were checking out the dead fish for themselves.

“We’ve been hanging out at the pool because… look, there’s no one hanging out at the beach. It’s terrible,” said one visitor. “We have another family vacation planned without kids in August and we’re not sure we’re going to come. If there’s red ride, we’re definitely not coming.”

The fish kills come as the National Weather Service issued beach hazards statements for red tide for coastal northern Lee County and coastal Sarasota County.

Captain Oneill is not sure what is causing the red tide, but notes after Lake Okeechobee water releases, Southwest Florida’s coasts regularly have fish kills.

“I can’t put my finger on what exactly the problem is, but I can certainly tell you any time they dump that lake, and the discharge comes out of the mouth of the Caloosahatchee River, within a week we start seeing significant kills along our shorelines here in Southwest Florida,” he said. “It’s sad to see that so much death is happening. I’ve only been here 15 years, and year after year I see things like this. This is the worst I’ve seen, and I’ve yet to see anyone out here assessing the problem or trying to figure it out.”

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Hundreds of dead catfish, eels and seahorses found on a beach in Kailua, Hawaii, USA

Some Kailua residents thought they could took a break from the rain and stroll the beach.
Instead, they found hundreds of dead fish littering the shoreline.
The fish were found Sunday along Kailua Beach near Castles. Some of the marine creatures found rotting on the beach were seahorse, eels, and hundreds of freshwater catfish.
“I’ve never seen anything like this,” said Kailua resident Zabia Geisreiter. “I brought my dog down here today and we only spent about five minutes. You don’t want to walk in this.”
We learned the City and County of Honolulu is responsible for removing beach debris if it becomes a nuisance or unsanitary. The city tells us it’s looking into the situation and will have an update Wednesday.
At this point, the city says it’s unknown where the fish came from. It’s possible the stream runoff from the storm caused the fish to die.
“One major possibility is that all the rain and runoff created nutrients, a plankton bloom, used up all the oxygen in the marsh, and the low oxygen levels led to a major fish kill,” said Alan Friedlander, director of Fisheries Ecology Research Lab at the University of Hawaii.
“We don’t usually see this many dead fish,” said Michael Loftin of 808 Cleanups.
808 Cleanups says it’s willing to lend a helping hand, but is waiting to hear back from the city first. In the meantime, Loftin warns beachgoers to be careful.
“I wouldn’t want dogs or any other animals eating this fish, so I would advise people to keep a close eye on pets while they are out here until this gets cleaned up,” he said.
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Hundreds of dead eels found in a stream, ‘a shock’ in North Christchurch, New Zealand

Hundreds of fish found dead in a north Christchurch stream were of a rare species that is declining in number and regarded as being at risk.
About 800 fish and eels were discovered in a 4-kilometre section of Kaputone Creek in Belfast on Wednesday.
Environment Canterbury (ECan) investigators are analysing water samples and testing the fish for the cause of the deaths.
They believe the fish were killed by a contaminant, possibly something that entered the stream through the stormwater network or from someone dumping something in the creek.
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Mass die off of fish in the waters of Wilhelmshausen, Germany

Fish Kill Alert
Eel, perch, pike, roach eye – all dead. Martin Engelmann is shocked. The 77-year-old angler can not comprehend the mysterious fish death at the lock at Wilhelmshausen. “This is a disaster,” says the Kassel hobby fisherman, who has been fishing in the area for 40 years.
Who is responsible for death? Engelmann has a guess: the waterway and shipping office in Hann. Münden, which operates the sluice.
“It must have to do with the regulation of the state,” says the Kasseler, “like many other anglers, I also believe that the dams were drained too fast.”
“I’ve never seen anything like this before, I could really cry.”
This led to the fact that the fish from the area with normally calm waters could not swim in time and died miserably. “I’ve never seen anything like it, I could really cry,” says Engelmann.
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Dozens of dead eels found washed ashore in a lake in Hawke’s Bay, New Zealand

Dead eels at Lake Tutira this week. Hawke's Bay Regional Council is investigating.
Another fish kill at troubled Lake Tutira in Hawke’s Bay has authorities concerned.
About 20 dead or dying eels were found, and there were reports this week of dead trout at the lake, about 40 kilometres north on Napier.
It is the second time this year that a major die-off has been detected.
In January, trout and eels died en masse in an event thought to be linked to low levels of dissolved oxygen in the lake’s surface water.
“Fish kills have not been uncommon. However, the occurrence of two large fish kills in two consecutive years is unusual and of particular concern,” Hawke’s Bay Regional Council said on Thursday.
“I went up yesterday and saw about 20 dead or dying eels,” environmental scientist Andy Hicks said.
“The dead eels are very obvious to any visitors who approach the shore, with dead or dying fish observed around the boat ramp, camping grounds and northern end of the lake.
“There was a slight stink in the air.”
Slip slidin’ away: Eels dead from a previous die-off when “atypically low” dissolved oxygen levels were suspected as the cause.
He said regional council staff recorded a pH or acidity level of up to 9.4 at the boat ramp.
“Any reading above 9 is extreme…But unlike last year, the monitoring buoy in the lake has not recorded any periods of extremely high temperature or low dissolved oxygen around the times of this fish kill.”
Regional council staff saw many common bullies, small native fish, thriving in the shallows of Lake Tutira and nearby Lake Waikopiro. 
A Department of Conservation campsite is beside the freshwater lake.
Hicks said visitors should not touch any dead fish, which were not safe for humans or pets to eat.
Dead eels have been sent to Cawthron Research Institute for autopsies, and water samples sent for laboratory analysis to measure nutrient levels and algae presence.
The results might not be received till the New Year.
This time last year, HBRC declared the lake unfit for swimming, boating or kayaking.
In 2009, people were told not to swim in Lake Tutira after cyanobacteria algal blooms were discovered.
In 2008, the lake was infested with hydrilla, a highly invasive water weed which the Ministry for Primary Industries considered “one of the world’s worst.”
HBRC said it was working with Maungaharuru-Tangitu Trust to improve lake water quality. 
University of Waikato lake restoration specialists were also hired to work on a computer modelling project to find solutions for the lake’s ecological crises.
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60 TONS of fish have died in the waters of Maine-et-Loire, France

Fish Kill Alert

Also pike, eels and zander which accumulate on the shore. It is at this sad spectacle qu’assistent regulars fishermen of the place. “I have never seen a disaster like this,” laments a fisherman. At Champtocé (Maine-et-Loire), the commotion of combat. 30 firefighters backed by municipal employees and volunteers tirelessly since Monday collect the dead fish.
60 tons of dead fish collected in one week
Despite the stench, Madame Mayor is facing the situation. “Apart from discouragement as we can have, and the pain that one can have with all these dead fish, my concern is the health aspect . We want to collect the bodies as soon as possible to avoid nuisance, “says Valerie Leveque Mayor Champtocé. This is the slow decline of the Loire is the cause of this carnage. 60 tons of dead fish collected in one week. Rome, a small tributary of the Loire, is mounted above normal levels. The plants have absorbed oxygen needed by fish, causing their deaths by the thousands.
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Hundreds of dead fish and eels found in a lake in Hawke’s Bay, New Zealand

Fish Kill Alert

Hawke’s Bay Regional Council scientists are investigating an apparent “climate-related event” that has killed large numbers of trout and eels at Lake Tutira, north of Napier.
One estimate is that hundreds of fish have died at the lake, beside State Highway 2 between Napier and Wairoa.
The regional council believes the environmental conditions that caused the deaths have now abated and do not pose a danger to people visiting the lake.
Council scientist Andy Hicks said the deaths were probably related to low levels of dissolved oxygen in the surface water of the lake.
Data collected at Lake Tutira showed dissolved oxygen levels had been “atypically low” over recent days while summer weather had brought high water temperatures.
“At this time of year, the warmer surface usually stays separated from the cooler but low-oxygen bottom water. But there is some evidence of mixing – and this would explain the unusually low oxygen seen in the surface water,” he said.
“In combination with the high water temperature, the low oxygen levels observed would certainly be enough to explain some fish kills.”
Oxygen levels had “crept up” since Wednesday, meaning more deaths were unlikely, but the council would continue to monitor the situation, Hicks said.
Council environmental officer Ian Lilburn said he was unsure if the count of dead fish and eels would reach into the hundreds, as had been suggested.
He had encountered two to three dozen dead trout and a few eels when he visited the lake on Tuesday.
Despite the oxygen issue affecting fish at the lake, the water quality appeared to be “reasonable” meaning there was no public health issue, Lilburn said.
Just prior to Christmas the council warned the public of a non-toxic algal bloom on the lake.
Lilburn said as an algal bloom died off, it could sap oxygen from the lake, which may have been a factor in the fish deaths.
It was not the first time such conditions had led to fish deaths in the lake, he said.
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Thousands of fish found dead ‘a mystery’ in a stream in Denbighshire, Wales, UK

Fish Kill Alert

Thousands of fish have been killed in a stream sparking an investigation by Natural Resources Wales.
Up to 3,000 fish are thought to have been killed on a mile-long stretch of the Nant Mawr between Ruthin and Denbigh .
They include salmon, sea trout, brown trout, eels and bullheads.
The incident is believed to have been caused by a blockage in the river. This has now been removed and river levels are expected to return to normal shortly.
Exotic tuna caught off Llyn Peninsula ‘shows seas are getting warmer’
However, the Nant Mawr is an important spawning stream for fish and the incident is likely to have a serious effect on fish populations in the area.
Nant Mawr is a tributary of the Clywedog which feeds the River Clwyd.
Health warning in Wrexham after toxic algae found in lake
NRW officers warn that as the river flows return to normal, the carcasses are likely to be washed downstream.
The fish may have been dead for a few days and people are asked not to touch the carcasses and allow them to be washed away naturally.
Emyr Jones, leading the investigation for Natural Resources Wales, said: “Fish such as trout and salmon are an important part of the ecology of our rivers and our economy.
“We are now investigating the cause of the blockage and will look at taking enforcement action against anyone who may be responsible.”
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