Tag Archive | fish kill

Thousands of dead fish wash up in the San Antonio lagoon in Argentina #fish #Argentina

Fish Kill Alert

After the appearance of thousands of dead fish on the shore of the San Antonio lagoon , Buenos Aires party of Benito Juárez, authorities prohibited the entry to the property, of about 1000 hectares, to those who seek to fish or carry out any other type of sports activity and / or recreational.

The head of the volunteer fire department, Major Commander Pablo Madrid , reported that “on the day of January 22, he observed how thousands of dead fish began to emerge on the banks of the water mirror,” adding that due to this event, the corresponding notice to the Municipality of Benito Juárez and the Buenos Aires Ministry of Agroindustry for their intervention and the analysis of the lagoon and the phenomenon.

“Everything would indicate that it happened as a result of the high temperatures that this area is having, and the lack of rain. This phenomenon can be explained if one considers that the higher the water temperature, the less oxygen it retains and dissolves, “said Madrid.

Likewise, the fire chief indicated that “the lack of oxygen in the aquatic environment and the drop in water would have caused the deaths of the fish, but we must wait for the analysis of the specialists.”

Courtesy of infocampo.com.ar



Thousands of dead fish wash up on a beach in Gandia, Spain #fish #Spain

Fish Kill Alert

Xeraco beach and part of l´Auir in Gandia have awakened with the presence of hundreds of dead fish . Everything seems to indicate that the fish have reached the Safor coast after the breakdown of the facilities of a fish farm in Sagunto.

The first effects of this break were noticed a few days ago in Playa del Perellonet, and now we already have the same image in Xeraco. The fish that have been found dead in Xeraco belong to several commercial species such as croaker, sea bass or sea bream, and even a baby dolphin.

Courtesy of cadenaser.com


Hundreds of dead fish found floating in a river in Tweed Shire, Australia #fish #australia

Fish Kill Alert

Hundreds of dead fish found floating in a river in Tweed Shire, Australia

Courtesy of tweeddailynews.com.au

Thousands of dead fish wash up on beach in Kyrkslätt, Finland #fish #Kyrkslätt #Finland

Fish Kill Alert

Thousands of dead fish have been found on a beach on Porkala headland in Kyrkslätt. It is a matter of flooding that lies in piles both in the sea and on the beach.

It is unclear how the floods have ended up there and why they have died. The issue is now being investigated by the environmental authorities.

The fish have probably not been there for very long, and their surface is whole.

A similar fish death has not been observed before.

Courtesy of svenska.yle.fi


Hundreds of thousands of fish dead in river due to bush fires, in NSW, Australia #fish #NewSouthWales #australia

Fish Kill Alert

Hundreds of thousands of native fish are estimated to have died in northern New South Wales after rains washed ash and sludge from bushfires into the Macleay River.

Parts of the Macleay River – favoured by recreational fishers – have been turned into what locals described as “runny cake mix” that stank of rotting vegetation and dead fish.

One freshwater ecologist told Guardian Australia the impact of the fish kill might be felt for decades to come, with long-lived species like Australian bass hit hard.

The NSW Department of Primary Industries has been receiving reports of “hundreds of thousands” of fish dead in the river since December 2019.

Locals say rain in the past 10 days has seen more ash and mud from the parched and burned landscape running into the river.

The disaster on the Macleay River is one of eight fish kills reported to the department this year, with the cause of most linked to lack of rainfall.

Larry Newberry, a recreational fisher from Frederickton, near Kempsey, said he drove 100km to George’s Creek to survey the river last weekend.

“I would say from what I’ve seen I would not be surprised that it’s wiped out every fish in at least 100 kilometres of the river,” he said.

“The stench was overwhelming – it stank that much it made you heave. It’s the dead fish, the rotting vegetation and the ash from the fires and maybe the fire retardant. It is just like brown sludge.

“I’ve been fishing the river for 50 years and I have seen fish kills before, but nothing of this magnitude. This will be happening in every east coast river that’s been hit by bushfires.”

Courtesy of theguardian.com


Tens of tons of fish dead in fish farm in Banjar, Indonesia #Fish #Indonesia

Fish Kill Alert

Tens of tons of tilapia in the floating cages of the Tamiyang River, in Awang Bangkal Village, Karang Intan District, Banjar Regency, South Kalimantan (South Kalimantan) died suddenly. The death of tens of tons of tilapia has occurred since the last three days. Even though the fish will be harvested in a month. One of the tilapia fish farmers in Awang Bangkal Village, Mahmudah said, did not know the cause of the death of the tilapia in his pond.

Courtesy of regional.kompas.com


100,000+ fish dead ‘due to heat’ in Bristol Bay, Alaska, USA #Fish #Alaska #USA

Fish Kill Alert

The sun beat down relentlessly on Bristol Bay this summer, heating up the rivers and lakes where millions of sockeye salmon returned to spawn. July was the region’s hottest month on record, and in some rivers, that heat was lethal.

Tim Sands, a biologist for the Alaska Department of Fish and Game, estimates tens of thousands of fish died.

“Based on the catch rates we normally see and the escapement we normally see, well over 100,000 fish died in the river,” Sands said.

He’s talking about the Igushik River on the west side of Bristol Bay. It’s a long, winding, muddy river in the Nushagak District.

By early July, biologists were expecting an average of 15,000 fish to swim upriver every day.

Instead, “We saw 714 fish go up the Igushik by the tower on July 8,” Sands said. “The lack of fish moving up the Igushik River definitely was abnormal.”

Salmon won’t swim through water once it reaches a certain temperature. Water loses oxygen as it gets warmer, and the warmer it gets, the more oxygen fish need. As fish crowd on the bottom of a river waiting for the water to cool, they have less and less oxygen to breath.

Sands said about half a million fish should have escaped upriver to spawn. They only counted half that.

“The difference could have been all dead fish. That’s why I’m saying at least 100,000, ’cause truthfully I believe it could well have been over 200,000 fish. Cause that’s what we’re missing from the escapement,” he said.

Bristol Bay did have a huge harvest this summer — the second-largest on record. So when the heat broke toward the end of July and the fish pushed upriver, Igushik fishermen were actually able to catch more fish than usual. But that didn’t translate to a great season for everyone.

Courtesy of ktoo.org


Thousands of dead fish wash up on a beach in São Paulo, Brazil #fish #SãoPaulo #Brazil

Fish Kill Alert

Thousands of fish of different species stranded on the coast of São Paulo, on the border between the municipalities of Mongaguá and Itanhaém (SP). Images obtained by G1 on Monday (13) show the animals killed in the trash and vegetation on the beach sand. The case was confirmed by the Biopesca Institute.

As found by G1 , the apparitions began to be registered on the morning of last Sunday (12). In one of the records, made by a resident who prefers not to identify himself, it is possible to see the dead animals, some of them already decomposing, while the bather walks along the sand strip.

According to the Biopesca Institute, the case is a massive stranding of fish from the Sciaenidae family , including hake and croakers. The animals appeared along the beach that marks the limit between the municipalities. The suspicion is that the animals were victims of pedestrian fishing.

According to veterinarian Rodrigo Valle, general coordinator of the institute, the fish were probably released after being discarded after being caught in trawl nets. The technique would be used to fish for shrimp.

Courtesy of g1.globo.com


Thousands of fish have died in a river in Altrip, Germany

Fish Kill Alert

In Neuhofener Altrhein at Altrip thousands of fish have died. According to the competent municipality, the water last weekend’s upset and no longer contains oxygen. An angler had discovered many dead fish on Thursday and alerted the authorities. The firefighters had ventilated the Altrheinarm with floating water circulators. The oxygen content is now slightly increased again, it said. The cause of the fish kill is believed that the only three meters deep water has warmed too much in the summer.
Courtesy of swr.de

Large fish kills washing up in Orange Beach, Alabama, USA

Fish kill on Cotton Bayou in Orange Beach, August 3, 2015
Due to extreme heat and a lack of wind, fish kills are growing in number in the back bay areas of Orange Beach, Alabama. This kill was spotted on Cotton Bayou on the morning of Monday, August 3, 2015. (Courtesy/City of Orange Beach)
Widespread fish kills are occurring in the back-bay areas of Orange Beach and the summer heat wave appears to be the main culprit, according to Orange Beach Coastal Resources Manager Phillip West.
The unrelenting heat coupled with light northerly winds have prevented any kind of mixing of the waters to help oxygenate them, West said. Adding to the situation are schools of alewife, or possibly menhaden, which are extremely sensitive species. 
“So these species are up in huge numbers in waters that are already pretty stressed for dissolved oxygen and it’s just a recipe for a fish kill,” West said.
The first large fish kill was reported in Cotton Bayou on Friday and sightings continued throughout the weekend from Robinson Island, north of Perdido Pass, to Bayou Saint John, between Ono Island and Bear Point.
Most of the dead fish, typically between 4 and 7 inches long, have been found in Cotton Bayou, according to West.
An explanation for the events, West said, can be found in the pages of “Guide to Fishes of the Gulf of Mexico,” a book by Bob Shipp, the former head of marine sciences at the University of South Alabama.
“It says during summer months menhaden often congregate in shallow, poorly flushed estuaries. They’re intolerant of low dissolved oxygen levels such as those found in hot, still waters. Thus, fish kills may occur in a chain reaction,” West said.
The dead and decaying fish remove even more oxygen, resulting in more kills. “So it’s kind of a textbook phenomena just based on our conditions right now,” West said.
While out on Cotton Bayou Monday morning, West said one resident said he hadn’t seen fish kills that big since a record-breaking heat wave 25 years ago.
If the weather conditions persist, more fish kills are likely.
To address the problem, the city has placed a large garbage bin at the Boggy Point boat launch for residents to get rid of fish. Also, on Tuesday, the council is expected to discuss the possibility of mobilizing its debris contractor to assist with the cleanup. 
“I think this is probably the largest fish kill in the estuaries I’ve ever seen,” West said. “I’ve seen kills related to red tides and other things, like brown tides, that were pretty extensive. But of this type, this is definitely the largest that I’ve seen. I also can’t remember having gone through a July that was so unbearably hot for so long. Something was bound to happen.”
Courtesy of al.com