Daily Decay (17th March 2018)

Daily Decay (17th March 2018): Snubnose Pompano (Trachinotus blochii) @ Changi

This was one of the many casualties of a fish mass death in February 2014, caused by a harmful algal bloom in the eastern Straits of Johor.

Many of the offshore fish farms in the Straits of Johor raise Snubnose Pompano for human consumption, so this carcass could have come from one of the farmed fishes, instead of being of wild origin.

 

Daily Decay (10th February 2018)


Daily Decay (10th February 2018): Snubnose Pompano (Trachinotus blochii) @ Pasir Ris

This was one of the many casualties of a fish mass death in late February and March 2015, caused by a harmful algal bloom in the eastern Straits of Johor.

Many of the offshore fish farms in the Straits of Johor raise Snubnose Pompano for human consumption, so this carcass could have been one of the farmed fishes, instead of being of wild origin.

Snubnose Pompano (Trachinotus blochii)
Changi, 8th January 2017

Many of the offshore fish farms in the Straits of Johor raise Snubnose Pompano for human consumption, so this carcass could have come from one of the farmed fishes, instead of being of wild origin.

Slender Sharksucker (Echeneis naucrates)
Bedok Jetty, East Coast Park, 11th July 2016

These photos of a dried Slender Sharksucker were shared by Sabrina Tang. It had presumably been caught by an angler, then discarded and left to die on the jetty.

Find out how you can contribute to Monday Morgue too.

Brownback Trevally (Carangoides praeustus)
Pasir Ris, 22nd February 2015

This Brownback Trevally was one of the many casualties of yet another fish mass mortality event that was triggered by a harmful algal bloom.

Talang Queenfish (Scomberoides commersonnianus)
Pasir Ris, 22nd February 2015

This Talang Queenfish was one of the many casualties of yet another fish mass mortality event that was triggered by a harmful algal bloom.

Workers showing the dead Pompano and Red Snapper at a kelong off Pasir Ris beach on Feb 28, 2015. The Agri-Food and Veterinary Authority of Singapore (AVA) will help fish farmers affected by the recent fish deaths to recover and restart their farms, it said in a statement. Photo by Kevin Lim

AVA to work with farmers affected by fish deaths to recover and build up resilience
5th March 2015;

The Agri-Food and Veterinary Authority of Singapore (AVA) will help fish farmers affected by the recent fish deaths to recover and restart their farms, it said in a statement.

It is also working with external agencies and experts to explore solutions to minimise the impact of plankton bloom.

Late last month, many local fish farms in Changi near the East Johor Straits were affected by plankton bloom. The farms suffered massive fish deaths as a result.

Minister of State for National Development and Defence, Dr Maliki Osman, visited two of the affected fish farms on Thursday.

He said he sympathised with the fish farmers who are affected by the recent incident, but learnt that one farmer who took early action was able to save his fish and minimise losses significantly.

AVA said it sent out an alert to fish farmers in the area on Feb 16 and 17 to warn them about elevated plankton levels and to take the necessary precautions.

“Mr Gary Chang told me that he started preparing for a possible plankton bloom once he was alerted to elevated plankton levels. He lined his net-cages with canvas and installed a simple filtration system to maintain the water quality,” Dr Maliki said.

“Other farmers also took measures, but unfortunately suffered severe losses as they may not have done so early enough.”

Plankton found in seawater can multiply quickly in a very short period of time, and plankton bloom can be triggered by unpredictable weather, higher concentrations of nutrients in the sea water and poor water exchange during high and low tides.

Said Dr Maliki: “Plankton bloom occurrences are very difficult to prevent, but it is possible to reduce the impact. Whilst we provide assistance to help farmers tide over this difficult period, it is also important for farmers to do their part to take mitigating measures early.”

AVA is also looking into how to build up farmers’ resilience against such incidents. This includes putting in place robust contingency plans and conducting contingency exercises, he added. “We will also ask those who have taken early action to share their experience with other farmers.”

Following a similar episode of plankton bloom last year, AVA started to work with the Tropical Marine Science Institute at the National University of Singapore to conduct studies on plankton bloom. The studies are still ongoing.

AVA also called for proposals for closed-containment aquaculture systems for coastal fish farming last year.

The agency recently awarded the tender to five companies to develop a more sustainable sea-based farming system that will minimise exposure to environmental changes, such as plankton bloom.

AVA CEO Tan Poh Hong said: “The proposals from the companies are promising… We hope that the projects can bring about significant improvements to boost the resilience of fish farming.”

Source: The Straits Times (Mirror)

1-2. Very large dead fish probably washed up at most recent high tide.
3. I saw about 20 of these small dead groupers.
4-5. Other dead fishes seen.

I heard the water was not quite right at pasir ris. So had a quick look. White powdery insoluble stuff deposited at most recent tide line. Dead fishes of various kinds large and small every 20 steps or so. Beginning of plankton bloom? Will blog later.

Ria Tan Facebook

The fishes pictured are Pickhandle Barracuda (Sphyraena jello) (1-2), some sort of juvenile Grouper (Epinephelus sp.) (3), Talang Queenfish (Scomberoides commersonnianus) (4) and Snubnose Pompano (Trachinotus blochii) (5). The young Groupers and possibly the Snubnose Pompano are likely to have originated from the fish farms offshore, but the Pickhandle Barracuda and Talang Queenfish are wild fishes that were possibly also affected by the adverse environmental conditions.

Philippines: Oil spill from Sual power plant threatens 700 fish cages

By Joel Locsin, 28th October 2014;

An oil spill from the coal-fired Sual power plant in Pangasinan is threatening some 700 fish cages in the area.

The sight of thick oil and dead fish startled residents in the area since early Monday morning, GMA Dagupan’s Joyce Segui reported on GMA News’ Saksi.

“Confirmed that we have an oil spill because of pipe rupture sa isa sa aming mga facilities,” said Jessa Calaunan of Team Energy Sual.

Since the oil spill is near 700 fish cages, many fear the incident may affect local mariculture and marine fishing industries.

The Sual mariculture park produces 20 metric tons of bangus (Milkfish) (Chanos chanos) and 10 metric tons of pompano (probably Snubnose Pompano) (Trachinotus blochii). Most are sold in Metro Manila.

Municipal environment and sanitation officials have taken samples of the water.

The Department of Environment and Natural Resources in Region 1 has taken efforts to prevent the spill from spreading.

Provincial environment officials are also monitoring the incident.

Source: GMA News Online

Philippines: Oil spill from Sual power plant threatens 700 fish cages

AVA support for farmers hit by mass fish deaths
By Grace Chua, 14th February 2014;

Fish farmers affected by the recent mass fish deaths do not have to worry about missing mandated productivity targets, said Minister of State for National Development Maliki Osman, during a visit to coastal fish farms on Thursday.

Their losses will be considered when their production is counted, and they can turn the setback into a chance to improve their farms, said Dr Maliki, who met several farmers during his visit to two farms off Changi affected by mass die-offs.

In all, 34 farms in the eastern Johor Strait and five in the west Johor Strait have lost some 160 tonnes of fish so far. The die-offs were attributed to low levels of dissolved oxygen and a plankton bloom due to hot weather and neap tides, when high tides are at their lowest, said the Agri-Food and Veterinary Authority (AVA).

While fish farms must produce 17 tonnes of fish per half hectare of farm space to keep their licences, Dr Maliki said “it’s only fair that we tell the farmers it’s okay, we look at how much losses you have suffered this time round, your productivity performance will be measured in line with the losses you have suffered”.

The affected farms were also rearing fish more vulnerable to poor conditions, such as Grouper (F. Serranidae), Golden Trevally (Gnathanodon speciosus) and Threadfin (Eleutheronema tetradactylum), he added. Singapore’s farms produce about 6 per cent of the fish consumed here, the AVA said.

But fish in the market are safe to eat: the dead fish have all been disposed of properly, he said.

Dr Maliki, who is also South East District mayor, said the South East CDC would offer support to the families of affected Singaporean farmers and workers.

He said the authorities would also help fish farmers tap a $30 million AVA fund meant for boosting food production here, to improve aeration systems for example. But farmers must pay for equipment up front first, then submit receipts to get reimbursements.

Farmer Goh Joo Hiang, 60, who had lost up to $200,000 worth of fish, said the losses should also factor in next year’s productivity targets. “Even if we bought two-inch fry now, it would take a year to raise them.”

Meanwhile, the dry spell since mid-January has meant that more water has to be pumped into reservoirs.

Environment and Water Resources Minister Vivian Balakrishnan wrote in a Facebook post on Thursday that water agency PUB has been running Singapore’s desalination and Newater plants “at close to full capacity”. The two desalination plants here can meet up to a quarter of Singapore’s water needs, with a combined output of 100 million gallons per day (mgd).

Source: The Straits Times (Mirror)