CAROLYN KHEW Straits Times 7 Mar 15;
SINGAPORE - Thousands of fish were found washed up on shore at Lim Chu Kang jetty on Saturday in the latest in a series of mass deaths.
Breeds big and small, including catfish and mullets, were discovered on the beach near where several fish farms are situated in the Strait of Johor.
Both sea and farm fish were affected.
Farmer Ong Kim Pit, 65, told The Sunday Times that he first saw fish jumping out of the water on Friday night, adding that his baby mullets were worst hit.
"It happened within minutes," he said. "My fish were jumping and jumping in the water. I don't know why."
Cleaners were seen removing bags of dead fish on Saturday.
It is not yet known what caused the mass deaths, but they came a week after a deadly wave of plankton bloom wiped out almost all of some Changi farmers' stocks.
The Agri-Food and Veterinary Authority (AVA) said the bloom had killed an estimated 500 to 600 tonnes of fish as of last Wednesday, and affected 55 out of 63 farms in the East Johor Strait.
The AVA's preliminary findings showed elevated levels of Karlodinium veneficum in seawater samples, which has been associated with fish deaths worldwide.
Meanwhile, photos of dead fish at Kranji Reservoir Park and Sungeh Buloh Wetland Reserve also surfaced online on Saturday.
Govt to help fish farms, but farmers must be vigilant
Carolyn Khew The Straits Times AsiaOne 8 Mar 15;
Help will be given to fish farmers badly hit by a plankton bloom last week, but they must also do their part, said Minister of State for National Development Maliki Osman yesterday.
The assisting agency, the Agri-Food and Veterinary Authority (AVA), will provide assistance to fish farmers to recover and restart their operations.
It is also looking at how farmers can build resilience through contingency plans and carry out contingency exercises. But farmers, too, must be vigilant and proactive.
Yesterday, the Ministry of National Development said the AVA had alerted all the farms to elevated levels of plankton in the water, but not all of them took mitigating measures immediately, either because they did not have the tools to do so, or the means to afford them.
"Plankton bloom occurrences are very difficult to prevent, but it is possible to reduce the impact," said Dr Maliki after a visit to two farms located near the Lorong Halus jetty in Changi yesterday. "While 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."
The AVA said the bloom killed an estimated 500 to 600 tonnes of fish as of Wednesday, and affected 55 out of 63 fish farms along the East Johor Strait. Its preliminary findings showed elevated levels of Karlodinium veneficum in seawater samples. "This plankton has been associated with fish kills worldwide," said an AVA spokesman.
Fish farmer Gary Chang said he was alerted to elevated plankton levels on Feb 16 and 17 by the AVA and started preparing for a bloom as early as Feb 20. The 58-year-old created a buffer by lining his net cages with canvas and installed a simple filtration system to maintain the air quality.
He said he lost less than $30,000 worth of fish this year, compared to $300,000 in a similar incident last year. "You have to prepare early. If you wait till the bloom hits, it will be too late," he said.
Dr Maliki, who visited Mr Chang's farm, said: "Other farmers also took measures, but unfortunately suffered severe losses as they may not have done so early enough."
This is the second bloom in as many years. Last year's incident killed about 500 tonnes of fish at 53 farms in both the East and West Johor straits, said the AVA spokesman. After that incident, farms had to restock their fish and some are planning to move to other sites.
Plankton blooms can be deadly as they suck oxygen from the water, suffocating other marine life.
The AVA said yesterday it was working with the Tropical Marine Science Institute at the National University of Singapore to conduct studies on plankton blooms.
An earlier tender called last year to design and develop closed containment aquaculture systems has also been awarded to five companies. The agency said no marine biotoxins were detected based on fish samples collected from the affected farms. It also said that live fish which are harvested from the farms are safe for consumption.
