Corral, guidance and representative of the tourism sector.
Corral said one of the owners noticed from the previous Thursday the death of a few fish, and yesterday this number was multiplied by countless far.
The guidebook said that the death of this variety of fish known as “tilapia” has occurred in the 1,732 hectares of the wetland. The guide says that the birds have also died and so far the causes that have led to the death of the species are unknown.
This day a minga to collect and remove the fish from the waters of the wetland, to avoid further pollution and know the exact amount of fish that have died, who will work together with the rangers of the Heart Isla be held, he said.
The guide said he called authorities of the Ministry of Environment, the same who came to the wetland and verified what happened.
“They will study the water to determine the causes of death, both birds and fish, this would take place on Monday and we will know what happened to the Senagua, to check for the possibility of opening a channel to allow more water because the wetland is drying and this could be one of the causes, “said Maria Corral.
The people in the industry call for an investigation of the act is carried out to determine the causes of the deaths of fish in this sector. They fear that the water is contaminated.
Lower Neuse Riverkeeper Travis Graves inspects dead menhaden along the shore at Flanners Beach Wednesday morning
A putrid odor fills the air at Flanners Beach Wednesday.
For as far as one can see, dead Atlantic menhaden lay sprawled out across the riverbank, the result of the Neuse River’s most recent fish kill.
Travis Graves, Lower Neuse Riverkeeper, says that it is getting worse in numbers of and in size of the dead fish.
“We’ve been seeing the ‘peanut’ or younger ones for a few weeks now, but more of the adults are beginning to show up dead on the shore now,” Graves said. “I’m estimating the numbers to probably be closer to 200,000 now than the 100,000 we first thought it to be.”
Graves said the fish are dying from a lack of oxygen caused by excessive nutrients, such as phosphorous and nitrogen in the water.
He said that algae blooms develop in the water and a bacterium called Aphanomyces Invadans (or A. Invadans) kills the menhaden from the inside out.
Each of the dead fish on the shore has a dime-sized portion of its body near their rectum missing, almost as if something took a bite of them.
A large number of fish in 44 farms have died due to the infection, causing frustration among fish farmers. Humans can get infected by consuming undercooked seafood or exposing an open wound to sea water.
A type of marine bacteria, Vibrio, has been detected in fish samples taken from Singapore’s coastal fish farms.
While Vibrio is found naturally in tropical marine environments, humans can get infected by consuming undercooked seafood or exposing an open wound to sea water. Diarrhoea, vomiting and fever are some symptoms of the infection.
Experts say warm weather and rising sea surface temperatures have led to the rapid growth of marine micro-organisms, which release toxins that kill the fish. A large number of fish in 44 farms have died due to the infection, causing frustration among fish farmers.
Singapore Marine Aquaculture Cooperative Chairman Phillip Lim said two farms in Lim Chu Kang lost about 60 tonnes of fish to Vibrio, and his own farm has also been affected. “I started with 8,000 fish. I’m only left with 200 to 300-plus fish,” he said. The infection was discovered when they sent samples to the Agri-Food and Veterinary Authority of Singapore for examination.
“For us, as farmers, we don’t have the equipment, so we need more professional help on that, to advise us what to do about all this. Because Vibrio can also infect humans, so it is quite dangerous.” Mr Lim said stress might have killed the fish as well.
While dead fish are disposed of, those still alive are sold at local markets. The public is urged to ensure the fish is fully cooked, before consuming them.
Autopsy results of dead fish collected at Koh Racha Yai off the southern coast of Phuket have yielded no clues as to why scores of reef fish are being found dead in the area (story here).
“We have yet to determine the cause of death. Experts conducted autopsies, but the results were inconclusive,” Phuket Marine Biological Center (PMBC) Director Ukkrit Satapoomin told the Phuket Gazette yesterday.
“Also, we checked the water conditions thinking that perhaps an influx of cold, less-oxygenated water transferred with more oxygenated water in the reef areas. However, that was not the case,”
The other possibility is humans, Mr Ukkrit said.
“We have contacted people within our network and asked them to keep an eye out for any possible illegal fishing that might have caused the deaths. At this point, however, we do not want to make any unsubstantiated allegations,” he explained.
“I have also contacted the Phuket Office of the Department of Marine and Coastal Resources (DMCR) for additional ideas on what could be done to prevent the deaths from continuing.”
After the reports concerning the dead fish off Koh Racha Yai, reports of dozens of dead fish found along Nai Harn Beach surfaced.
“We cannot do this alone. People must not be afraid to contact us if they are able to document illegal fishing,” said Department of Marine and Coastal Resources (DMCR) Region 5 Chief Tanet Munnoy.
Fish kill in Lake Rancia, Arpat: “The analysis does not give an indication of the presence of chemical alterations. The hypothesis is the collapse of the system ‘
There are the results of laboratory tests performed on the sample of water taken from the technical Arpat in Lake Rancia ( read the news ), in the Sovicille, after there had been a die-off of fish. The data, however, do not give further indications about the presence of chemical changes that might have given rise to the event.
“The comparison of the value of conductivity – is to know the Arpat – the content of sulfates, bicarbonates and sulfides does exclude a massive presence of thermal waters with characteristics similar to those of the surrounding area, speculated upon by some memory. Also research the set of potentially toxic metals for the fish life was negative with values below the detection limits. “
“As reported in our previous news – continues the Arpat – the measurements made in the field have established a presence of oxygen in the water is not compatible with the fish life, but that could be correlated to the processes of degradation due to the memory of the animals already in act and not necessarily be the cause. Therefore, in light of the analysis carried out by ASL on dead animals, which do not show certain causes for the event happened, the most likely hypothesis may be that of a collapse of the system. “
“In summary – concludes Arpat – the most probable hypothesis is that the pond, consisting of a closed system that has no exchange with water courses both in input and in emission, due to the previous location inside of fish , also consist of non-native species, in order to promote sports fishing which was then made to cease, came to be in a situation of imbalance environmental, probably favored also by external climatic factors, has led to the memory, at first of small fish, which gave rise to the first aerobic fermentation processes that were due to the subsequent degradation of the habitat to make life unbearable for animals of larger size.”
Continue shrinking of water in the reservoir Jangari, Cianjur district due to the long drought last few months detrimental to farmers net. The reason is, because of this shrinkage, 13 tons of fish in the reservoir Jangari dead and causing damage to hundreds of millions.
According to the Head UPTD Aquaculture Development Center and Public Bodies Cirata, Ade Durrahman, the death of dozens of tons of fish was observed since Wednesday (10/15/2014). It is said Ade, fish mortality is most prevalent in net cages located in the outskirts of Reservoir Jangari.
“Due to the lack of water supply during the dry season, the oxygen is low plus the bad water quality,” said Ade in his office, Wednesday (10/15/2014).
The dead fish is a type of carp and pomfret. In anticipation of more deaths, Ade was instructed farmers to harvest fish net early. In addition, the feed must be reduced in order to fish in the pond is not too full and can still breathe oxygen, although minimal.
“If the gini should not grow fish are less durability. Its powerful it like catfish, catfish, carp, and others,” he said.
Until yesterday, the total shrinkage in Reservoir Jangari has reached 16 meters from the normal height in the range of 18 meters. This condition is clearly worrying especially in Cirata net amount already over capacity.
“Of the 12,000 to 53,000 set now. It’s more easier if there is a virus infection. If now the addition of baseball may be,” said Ade.
THE Division of Fish and Wildlife is discouraging the public from eating blue-banded surgeonfish commonly known as “hiyok” because it is “dangerous.”
Acting Director for Fish and Wildlife Manny Pangelinan in an interview on Friday said the public should not eat hiyok until there is an official announcement that it is safe to consume.
Pangelinan said they have received the results of tests done by experts in Hawaii that revealed that fish-kill incidents on Tinian and Saipan in the past two months were caused by marine toxins.
However, he added, there are no findings yet as to what kind of marine toxins killed the fish.
Pangelinan said the public should remove the guts of the fish and wash the insides thoroughly before cooking it.
“The experts found that the fish flesh or meat is not poisonous, but the guts could be, so we are not 100 percent sure that it is safe to eat and one should be very cautious in eating this kind of fish,” he said.
Mike Tenorio, a fisheries biologist, said hiyok is one of the top selling fish in the local market, but vendors have already stopped selling it.
“We discourage people from eating it, but if they chose to do so they should be very careful,” Tenorio said.
Pangelinan said this is the first time that fish-kill incidents involving hiyok have happened on Saipan.
But he said such incidents were only reported on Tinian and Saipan and not on Rota and Guam.
The first incident of fish kill happened on Tinian on Aug. 16 at the Chulu Beach and Masalok Beach.
Thousands of fish were found floating dead.
On August 28 another incident of fish kill was reported to DFW at Obyan Beach on Saipan. Similar incidents were reported on Sept. 10, 14, 19, 21 and 22 at Laolao Bay, Managaha and Tank Beaches.
A series of investigations, sample collections and samples testing were done by DFW personnel to determine the cause of these fish kills.
Dr. Thierry M. Work, a wildlife disease specialist from the National Wildlife Health Center in Hawaii, was also asked to examine samples of fish collected and submitted by DFW.
“Dr. Work found there are marine toxins, but it’s difficult to pinpoint what kind of toxins because there are so manymarine toxins,” Pangelinan said.
“We wanted to determine if the marine toxins can be transferred to humans or if it was a kind of virus.
“It’s not a virus or bacteria and the fish are not starving.”
Pangelinan said they are still closely monitoring the incidents and continuing to investigate while seeking more expert opinions regarding the marine toxins and why they are affecting hiyok only.
Workers are salvaging dead fish ponds. China Chinese Commercial News reporters Huang Li and Jian She
Original title: Xi’an, a mass death of fish ponds 20,000 farmers suspected to be poisoned ponds
Seeing is about to harvest, more than 20,000 fish, but all died overnight. This allows Xi’an Chang’an Yangzhuang Subdistrict villagers Sheng very sad.
37-year-old Li Sheng is Chang’an District Subdistrict Yangzhuang stone village villager, he has a seventy-eight acres of fish ponds. February he bought 20,000 fish, grass carp, silver carp and carp, seven months after feeding, these fish have grown to about 1 kg of fish, is expected to again be able to make money a month.
Ponds have someone to look after 24 hours, Sheng ride in a makeshift pond, live there. Yesterday 0:30 Xu, Li Sheng abnormal when viewing ponds, “there are many ponds floats on the water, waving white belly,” and two hours before he was to see the fish ponds, everything is still normal.
Sheng Huazhexiaochuan ponds turn a full circle, “a large area of dead fish in the pond waters south could see twelve square meters of foam, the air pungent taste.”
11 o’clock yesterday morning, Li Sheng and his wife live fish pond crouched sigh. “There are about 20,000 fish, the loss of at least ten million.” Sheng said upstream ponds used for water, there are several ponds, no problem. Feed their own use, but also the long-term use, should not be a problem. Combined with the early morning the water appeared a large area of foam and air pungent taste, Sheng suspect that someone poisoned the fish pond.
After the incident, Li Sheng alarm to the district police station. Soon, the Public Security Bureau Chang’an Yangzhuang police station rushed to the scene to investigate and extract water samples and dead fish pond samples were identified.