Source: Hilbert Montell Facebook

Some of the dead fishes seen in Sungai Oya in Sarawak, presumably casualties of a recent mass mortality event. Two of the fishes in these photos are identifiable as Fire Eel (Mastacembelus erythrotaenia), while the other two are of unidentifiable Catfishes (Siluriformes).

 

Zebra Spiny Eel (Macrognathus zebrinus)
Kranji Marshes, 3rd February 2016

Dead fish were found in a portion of Binalbagan River in Barangay Quintin Remo in Moises Padilla town.
Photo: Jed Jabonete Gumban

Philippines: Fish kill hits river in southern Negros
By Erwin P. Nicavera, 25th May 2016;

Two barangays in Isabela town, situated along Binalbagan River in southern Negros Occidental, reported a fish kill possibly caused by sulfur contamination following heavy rains that washed out ash fall emitted by Mt. Kanlaon.

Arturo Calma, municipal agriculture officer of Isabela, told Sun.Star Bacolod on Tuesday, May 24, that fish kill incidents were recorded in Barangays Tinongan and Panaquiao starting Monday afternoon, May 23.

Calma said that sacks of dead fishes, particularly Tilapia (Oreochromis sp.), Mudfish (Common Snakehead) (Channa striata), and Eel (F. Anguillidae and F. Synbranchidae), were found floating on the river, some covered with mud.

“We have learned that some residents are even collecting dead fish for consumption,” Calma said, adding that monitoring and assessment is being conducted by the Municipal Disaster Risk Reduction and Management Office and the Municipal Agriculture Office.

The Office of the Provincial Agriculturist (OPA) through its Fisheries Division took water and mud samples from the two affected barangays on Tuesday.

Aquaculture technician Constancio Española Jr. said they will subject the samples to laboratory analysis to determine the actual cause of the fish die-off.

Aside from Isabela, fish kill incidents were also reported in some areas of Binalbagan, La Castellana, and Moises Padilla located along the Binalbagan River.

But Española said there is no confirmation yet from Binalbagan and Isabela.

“The last positive fish kill incident in La Castellana was last April this year, but for now, there is no confirmed reports from the area,” he said.

The Provincial Disaster Management Program Division (PDMPD) is also validating reports on fish kill, said its head Zephard Gerhart Caelian.

Caelian said heavy rains over the weekend washed out the ashfall from Mt. Kanlaon toward nearby bodies of water, including Binalbagan River.

“The high contamination of sulfur in the river might have resulted from the pyroclastic material flow brought by the recent ash fall emission of the volcano,” Caelian said, adding that according to the Philippine Institute of Volcanology and Seismology (Phivolcs), “it is a normal occurrence.”

Last May 11, a sulfurous odor that lasted for almost 10 hours was smelled in portions of La Carlota City and La Castellana town, particularly those living near Mt. Kanlaon.

For areas with confirmed fish kill incidents, PDMPD warned residents to avoid consuming dead fish, or even swimming in the affected-portions of the river.

“Exposure and intake of contaminated water pose health hazards, including poisoning and skin diseases,” Caelian said.

Source: Sun.Star

Malaysia: Hundreds of fish dead in Sungai Pinang

By Looi Sue-Chern, 25th June 2015;

The Penang government and environmental authorities are investigating why hundreds of fish in Sungai Dondang, Paya Terubong, Penang, turned up dead earlier this week.

State local government exco Chow Kon Yeow said Penang Island City Council (MBPP) will take stern action against the party found to be responsible for the river pollution that killed some five different types of fresh water fish, including haruan (Common Snakehead) (Channa striata), eel (Swamp Eel)(?) (Monopterus javanensis) and catfish (Siluriformes).

He said there was no proof yet but the council had found three premises, which only one had permit, that could have caused the pollution.

“The council had previously issued notices to the premises, which were discharging effluent into the river but we haven’t determined whether they are the culprits yet because the state environmental department is still investigating the cause,” he said.

“When we find out who did this, MBPP will take stern action, such as shutting down the business or revoking the license.”

“We are really saddened by this incident.”

“It was only last week that we felt encouraged by the sightings of otters in Sungai Pinang.”

“It was a sign that the water quality of the river had improved,” he told reporters during a site visit in Paya Terubong.

Chow said it only showed that the level of awareness among the public and business operators was still lacking and the authorities would have to step up on its engineering, enforcement and education initiatives to prevent this from happening again.

He also said the authorities were in the process of identifying all buildings on the banks of Sungai Pinang, and the exercise would be extended to its tributaries as well.

“We also have limited resources, so our current focus on promoting behavioural change and positive transformation is on the river basin catchment areas of Batu Ferringhi and Sungai Pinang,” he said.

Sungai Dondang is one of the tributaries of Sungai Pinang, one of the main rivers on Penang Island.

The dead fish incident was reported to the authorities on Monday.

Northeast district drainage and irrigation department (DID) engineer Haslinda Mohd Hamran said the department investigated and found that the areas affected were in parts of Sungai Dondang, Sungai Air Itam and Sungai Pinang.

She said samples had been taken and sent for testing to find out what caused the fish to die.

State environmental department director Nor Hayati Yahaya said environment officers also checked the pH level of the water and found it normal.

“But we are still waiting for the chemical department report on the samples we took from the river, so we can find out whether the pollution was caused by nearby industries.”

“Industrial activities could be the source but we also must bear in mind that when we took the samples on Tuesday, the effects of the pollution reported a day before might have been lost already.”

“There have been no new incidents since we got the complaint on Monday,” she said.

Hayati said the department also checked a nearby laundry business and a factory producing vegetarian food but did not find them discharging effluent into the river.

State DID director Anuar Yahya said there had been no similar cases reported on the island before and urged the public to help the authorities by keeping an eye on the rivers.

“We don’t have the capacity to monitor the rivers around the clock and we need the public to report to us whenever something happens,” he said.

Source: The Malaysian Insider

Malaysia: Hundreds of fish dead in Sungai Pinang

Pink Mud Eel


Pink Mud Eel (Macrotrema caligans)
Pasir Ris, 30th December 2009

This carcass of what appears to be a Pink Mud Eel was found by James Koh, who documented this and other dead fishes during a mass mortality event that occurred in December 2009.

This is one of many little-known species inhabiting shores that will be surveyed as part of the Northern Expedition of the Comprehensive Marine Biodiversity Survey. Taking place from 15th October to 2nd November, researchers and volunteers will be involved in collecting samples and surveying various marine habitats, in an attempt to catalogue the marine life that lives in the waters along the northern coasts of Singapore.

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