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
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
A few months ago, the appearance of several dead striped catfish in some rivers in the Magdalena basin set off alarms and caught the attention of authorities, environmentalists and scientists. For a time, large specimens of the species appeared floating in some points of the Cauca and Nechí rivers, with a yellow pigmentation on the back, however, the reason for the deaths remained a mystery, so several investigations were immediately promoted .
Last Saturday, inhabitants of the La Isla sector, in commune eight of Villavicencio, got up with similar news. Thousands of fish appeared dead along the Ocoa River, one of the main tributaries of the municipality. Unlike the situation in the Cauca River, this case seems to have a clear cause: the dumping of highly polluting substances on the tributary.
“The number of fish found is impossible to quantify,” Environment Secretary Sara María Cabrera, who appeared in the situation, said on Monday. “Highly resistant aquatic species, commonly known as the eel, the quiver, the cuchas, the chubanos and the sleepers, which usually survive in the mud, appeared dead. So powerful will have been what they poured ”, explained spokesmen of the same entity.
Courtesy of blogs.elespectador.com
This Tuesday, 14/1, photos taken by residents of Ilha do Governador show a great number of fish that polluted the sands of Praia de São Bento, close to Galeão International Airport. Most of the fish is of the species popularly known as sardine crooked mouth.
The Baía Viva Movement points to a number of factors as possible causes of death: the lack of oxygen in the water due to the excessive presence of organic matter due to the discharge of raw sewage (without treatment) and the large volume of garbage and other pollutants carried. to the waters of the bay by the rain that has occurred in the last days. Guanabara Bay receives 18,000 liters of untreated sewage daily. In addition to any oil leaks. In November 2019, 4 oil spills were found in the bay, 3 of which reached beaches on Ilha do Governador, which has a large concentration of oil activities in its surroundings.
Courtesy of diariodorio.com
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
Mass die off of fish in a lake in Manuel Irala Fernández, Paraguay #fish #Manuel IralaFernández #Paraguay
The fish appeared dead about 15 days ago in the settlement located a few meters from the Municipality of Irala Fernández.
The neighbors cleaned the reservoir, gathered and removed the fish from the water and then buried them in another place.
The strange event keeps residents and local authorities expectant, since they do not know the cause and there is a fear that it may be a water pollution .
Garcia said that the same situation would occur in another neighborhood, where there is a tajamar on private land.
Courtesy of ultimahora.com
“The whole beach was covered with small fish with their mouths wide open as if they were screaming. There were about 2000 on 4 kilometers of beach, up to Vieux-Boucau” says Karine Warkentin.
This German woman walks every day on this Messanges beach with her three dogs.
” I have been coming here for 30 years for three months and I have never seen anything like it. I was really shocked . “
Nearly 2,000 dead fish stranded on 4 kilometers of beach in the Landes
It is indeed unusual to find such a quantity of discarded fish in the same place.
“This is the first time that we have been confronted with this problem ” admits Georges Cingal, the president of Sepanso des Landes . ” It’s maddening”.
Courtesy of france3-regions.francetvinfo.fr
Hundreds of fish died in the waters of the El Pochote community dam in Pénjamo. It is the second phenomenon that is recorded in the town in less than a month, the first event occurred in the Lerma River , between La Piedad Michoacán and the Penjamense communities of Santa Ana Pacueco and Cuatro Milpas .
Dead animals decompose in the open and generate rotten odors. Inhabitants of the place said that the problem began since last Friday and ask for the intervention of the authorities to establish the causes.
El Pochote is a Penjamense town that is located 2 kilometers from the municipal capital, has just under 500 inhabitants. In the town there is a small dam with a territorial extension of approximately 4 hectares, in this site the death of fish was recorded due to unknown causes.
Alberto Segura, a local resident, reported that on Friday the dead fish woke up floating on the banks of the reservoir. These are young mojarras, a size no larger than 15 centimeters long; Dead animals on water have attracted some scavenger species such as seagulls.
Courtesy of periodicocorreo.com.mx
Hundreds of dead fish have washed up on beaches in French Polynesia’s Society Islands.
Pictures on social media show an array of fish on beaches on Raiatea and Bora Bora, with more floating in the lagoon.
It is not clear what caused the fish death.
According to local media, some believe they died because the water in the lagoon wasn’t refreshed while others believe the water had become too warm.
However, the mayor of Bora Bora told local television that it was a recurring natural phenomenon which happened every 20 years.
Courtesy of rnz.co.nz
The sudden death of thousands of goldfish in the Asso canal – probably dead from drought, but perhaps not – reopens a wound. The stream, in fact, is the final address of some consortium purifiers and is the subject of a detailed complaint (dating back to 2016) to the Public Prosecutor’s Office by the managers of the environmental associations in the area.
A complaint of which nothing is known. Silence that suspects many citizens who would like clarity. Yet the biologist and researcher Giampiero Dantoni has over and over again on the heavy and probable pollution of the waters. But, above all, on an important background “mystification”: the discharge of wastewater “underground and on the water table” is absolutely prohibited by law.
The discharge in the Asso torrent is defined as “delivery to a non significant surface water body” and not “delivery to the subsoil” as it is. As if all the wastewater disappeared by evaporation and absorption into the soil.
On paper, the waterway does not deliver to the Colucce vora. The Asso torrent is defined as “water basin with entry into the sea”, thanks to the creation of the “spillway”, a surface channel used for the “overflow” and which leads to the Frascone sea.
Courtesy of lagazzettadelmezzogiorno.it