Up to a million fish have died along a 40-kilometre stretch of the Darling River in far west New South Wales, in an event the State Government has described as “distressing”.
The mass killing at Menindee, near Broken Hill, came after a similar incident in the same part of the river less than a month ago.
According to the NSW Department of Primary Industries (DPI), toxic blue green algae is again to blame.
Native species including bony bream, Murray cod and perch, are among those affected.
DPI’s Fisheries Manager Iain Ellis said the event was unprecedented.
“I’ve never seen two fish kills of this scale so close together in terms of time, especially in the same stretch of river,” he said.
“In both cases it’s when the algal bloom has been disrupted.
“The first time due to a storm, and in this case, by the cold front that went through.”
Courtesy of abc.net.au
The denounce of massive fish and fingerling deaths was filed by Prof. Lorenzo Miranda , who regretted that once more fish are dying in the Caañabé stream , presumably due to the unconsciousness of the owners of a distillery located in the city of Sapucái.
He asked that those who contaminate the streams be investigated and punished, because several people draw fish from the stream for the daily food of their families.
Also, Councilman Alberto Virgilli and municipal councilor Margarita Miró went to the place and agreed that they are going to inform the Municipal Board about the death of fish.
In addition, there were agents of Criminalistics of the Police Directorate of Paraguarí, who took samples of water in a jar, made photographs and videos that were later turned over to the Public Prosecutor’s Office, under the prosecutor Darío Villagra .
The Caañabé stream is located in the buffer zone of the Ypoá lake wetlands and its contamination represents a great risk for the natural reserve that our country has, so its preservation is everyone’s responsibility and warrants a thorough investigation of the case to identify those who break the law, explained Councilor Miró.
The head of the Directorate of Supervision of the Ministry of Environment and Sustainable Development (Mades), Julio Marecos , said that just this morning they had knowledge of what is happening in the stream Caañabé and that they will communicate it to their superiors to know what determination They will assume about it.
In September 2012, the Municipal Board and the Intendancy of Carapeguá, due to the massive fish mortality, had declared an environmental emergency for 90 days, but it was not fully investigated who were the culprits.
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Between Monday and Tuesday thousands of dead fish appeared on the shores of the Los Molinos dam, many of them large. The first striking fact is that it was only one affected species: the carps. The phenomenon caused the surprise of many visitors to the place and opened questions about the causes, not yet clarified.
The Environmental Police of the Province took samples of the fish to analyze in the laboratory, but this task will take several weeks to provide answers.
Coastal communities had to improvise collection tasks to avoid the bad image and the terrible smell. Those charges were buried.
Until yesterday there were more questions than certainties.
Among the locals, the first hypothesis was that the extreme heat of these days affected that species, which at this time spawns in the low waters of the coasts, where the temperature is higher.
The biologist Federico Kopta, of the Cordoba Environmental Forum, admitted that reason as possible, because the heat reduces oxygen to the water. But he added others as possible complementary: he noted that “Los Molinos follows the steps of San Roque in the presence of nutrients that make the algae proliferate, which, when decomposed, also consume oxygen from the water”. Kopta recalled that the main cause of the presence of algae in these reservoirs is the lack of sewage treatment in their basins. He also added another possible impact: recent floods could drag a greater amount of diverse organic matter into the lake, further reducing oxygen, and affecting fish in shallower waters to a greater extent.
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A strange scene was recorded by a neighbor from Mar del Plata early Wednesday: when he approached the coast, he noticed the presence of hundreds of dead fish on the sand.
According to the account of the witness to the local environment 0223 , the animals without life could be seen from the breakwater of the fishermen to the Casino. “I can not believe it, it’s undermined,” he is heard telling the name while filming the mysterious episode.
Although it is possible that the animals have been discarded by a boat, the idea that the water has been contaminated is also considered, since, according to the neighbor, some arrived alive from the sea and died when they reached the shore.
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Dozens of dead fish of the species known as ‘topos’ were found in one of the lakes of the Puente Moreno subdivision, in Medellin de Bravo.
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New stranding of dead fish on the beaches of the South. The Cleaning Service of San Bartolomé de Tirajana has removed during the morning of this Wednesday another 1,000 kilos of trumpeters from the beaches of El Inglés and Maspalomas in which it has been the largest arrival of animal remains to the coast since they began arriving. a few months
While it is true that the frequency and number of kilos collected in recent months has increased, “there is nothing strange in the analytical” obtained after sending several samples to the Faculty of Veterinary Medicine of the University of Las Palmas de Gran Canaria , as confirmed by the Councilor for Coastline Care, José Carlos Álamo, which is why water pollution is ruled out. “Although something similar to what has been happening in recent weeks has never happened to us, everything still points to a natural process ,” the mayor explained.
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The work of removing dead fish from the mirror of Lagoa Rodrigo de Freitas ended on Sunday. The numbers impress: Comlurb teams have collected 89 tonnes since last Thursday. According to biologist Mario Moscatelli, the last major mortality before this happened in 2000, with almost 110 tons.
For Moscatelli, the phenomenon was caused by the combination of three factors: extreme heat, pollution and lack of renewal of the water of the Lagoa due to the silting of the Garden Channel of Alah. The Secretariat for Conservation and Environment (Seconserma) assured that the deaths were caused by the proliferation of cyanobacteria and phytoplankton.
On Sunday, the secretariat reported that the measurement recorded 4.97 mg / L of dissolved oxygen, above the ideal minimum of 3 mg / L. During the early morning and early morning OD ranged from 2.7 mg / L to 0.66 mg / L. “The lagoon is still recovering from its ecosystem, and the flag is still red. The monitoring continues until the complete lagoon balance, ” says a passage from Seconserma’s note.
For the cleaning operation of the Lagoon it took 601 garis, 61 cleaning agents and four catamarans.
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According to VNA, continuously on December 16-17, the phenomenon of abnormal death of fish on La Nga river (Dinh Quan district, Dong Nai province) happened again.
According to preliminary statistics of La Nga commune, there are at least 3 tons of cultured fish killed, causing hundreds of millions of dong damage; In particular, dead fish are mainly Lang, Nang Hai and carp.
Some raft fish farmers in La Nga commune said that the phenomenon of fish floating in the raft and starting to die from the morning of December 16 continued until December 17 and there was no sign of stopping. Dead fish are predominantly Lang fish with the weight of 2-3 litters / fish, the rest are carp and Leo and Nang Hai fish are preparing to sell. Many people perceive that the water here has a strange smell, the fish constantly float their heads and die.
According to Tran Thi Huong, La Nga commune, Dinh Quan district, from yesterday until now, the water in the river has changed color and the stench is rising. Initially, the Lang fish were floating and then died slowly, then the Two fish and carp also began to die until today.
In the wake of the massive fish death, on December 17, many fish raising households on the La Nga River moved fish rafts upstream, hoping to save the remaining fish.
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Some neighbors in Kingwood say they’ve been dealing with a horrible smell for days, and now they know why.
Hundreds of dead fish have been found floating near the bank of a river in far-western NSW, sparking concerns from a property owner about the safety of the water supply.
Menindee resident Wayne Marsden, whose property has access to the Darling River, made the bizarre discovery when he went to check on his water pump.
“The water is a real dirty, rotten green,” he told the ABC.
Mr Marsden estimated there were between 200 and 300 dead perch on a stretch of the waterway.
“There was nothing there yesterday.”
Mr Marsden has been using a water pump for his 12 racehorses but now has fears for their health.
“I don’t know how much it’s going to affect them,” he said.
“I don’t know if it’s doing any internal damage or not.
Mr Marsden said he had seen the phenomenon once before, about 20 years ago, but said the situation now was much worse.
Courtesy of abc.net.au
Texas Parks and Wildlife tells ABC13 the stench is due to what’s called a “kill,” and it happens naturally. Nothing is wrong with the water.
Thousands of the fish have popped up, floating from Lake Houston down tributaries.
“It’s like the entire top of the water was lined with fish,” said neighbor Jacob Duane, who reached out to Eyewitness News to help him find out what was going on.
The fish, which are called Shad, are all the same species. Texas Parks and Wildlife says fish can die when there’s low oxygen in the water due to the combination of warm air and warm water.
This year, spokesperson Heather Biggs says there have been 25 to 30 kills reported at 17 different locations in our region. But this is also the first year they have seen so many kills, which usually occur in stagnant water.
“There hasn’t been that much frustration, as much as sort of confusion and people just wondering what’s going on,” Duane said.
Texas Parks and Wildlife says if different kinds of fish were found dead, it could be a chemical issue and they’d investigate further.
Courtesy of abc13.com