Fish farms may move from Changi after mass deaths

Carolyn Khew The Straits Times AsiaOne 4 Mar 15;

AFTER a plankton bloom at the weekend wiped out almost all their stocks of fish, some farmers in Changi are looking at moving to sites with stronger tide conditions.

Others told The Straits Times they planned to invest in more costly closed containment systems that would be protected from such blooms, which can suffocate marine life.

The weekend incident was a blow to farms still trying to recover from a similarly devastating bloom a year ago. One of them, Ah Hua Kelong, went online to appeal for donations to help it meet its daily running costs.

Mr Frank Tan, chief operating officer of Marine Life Aquaculture, which produces about 200 tonnes of seabass and threadfin annually, said he had planned to move to two sites - one on Pulau Tekong and the other on the Southern Islands - following last year's incident, which wiped out 20 tonnes of his fish.

Last Saturday's bloom killed 120 tonnes of his fish.

"We spent the past year rebuilding our business and were planning to move only in about a few years' time.

Yesterday, he was still busy directing staff to bag and remove the dead fish.

Following the authorities' warnings, he had managed to save a few hundred adult fish by moving them to an offshore site located near his Changi farm.

Mr Tan said he will be ready to move in one to two months. He estimates the tides at Pulau Tekong to have a water flow rate three times stronger than those at Changi, so stronger support structures need to be built for the farm.

Fin Fisher owner Timothy Hromatka, 42, is not discounting a move to Pulau Tekong, but estimates he would need $500,000 to do so.

"Tekong is farther away (from the mainland), and this means higher operational costs."

The smell of rotting fish was strong around the fish farms, located near the Lorong Halus jetty, yesterday as workers continued to dispose of the dead fish.

As of October last year, home-grown farms contributed about 7 per cent to the industry, producing fish like sea bass and grouper as well as lobsters.

Plankton blooms are caused by factors such as warmer weather and a neap tide, when the high tide is at its lowest.

Some farmers such as Mr Malcolm Ong, chief executive of The Fish Farmer, who is in his 50s, are looking at farming under controlled conditions to protect their stocks from such unpredictable blooms.

But another farmer, Mr Simon Oh, in his 60s, said the systems can be challenging to install. He lost all 35 tonnes of his pomfret last week.

"I have no funds to restart my business, much less invest in such equipment," he said.

Additional reporting by Isaac Neo













Fish supply, prices in supermarkets unaffected by plankton bloom
CAROLYN KHEW Straits Times 5 Mar 15;

With local produce accounting for less than 10 per cent of their supply, supermarkets still have plenty of fish even after a devastating plankton bloom over the weekend killed more than 300 tonnes of stocks at farms in Changi.

Dairy Farm, which owns both Cold Storage and Giant supermarkets, said neither its supply nor price is affected as it practises "diversified sourcing", buying fresh fish from countries such as Indonesia and Malaysia.

About 10 per cent of Giant's fish supply comes from local farms while Cold Storage buys a "minimal" amount, said a spokesman. Local farms supply species such as grey mullet, golden snapper and golden pomfret, she said.

Home-grown produce makes up just 5 per cent to 10 per cent of FairPrice's fish, and less than 5 per cent of Sheng Siong's.

"Most of the local fish farms do not have the required facilities to transport live fish directly to our chain stores. So, at the moment, most of our live fish comes from Malaysia," said a Sheng Siong spokesman. The supermarket chain buys about 500kg of fresh fish daily from local farmers, mainly milkfish and mullet.

FairPrice and Sheng Siong said they are still buying local fish and reassured consumers that they are safe to eat. Overall, local fish farms contribute about 7 per cent to Singapore's supply.

The unexpected plankton bloom, the second in as many years, affected Changi farms located off Lorong Halus jetty most badly, with some losing almost all of their fish stock overnight. Plankton blooms can be deadly as they suck oxygen from the water, suffocating other marine life.

One farm alone, Marine Life Aquaculture, lost 120 tonnes of threadfin and seabass.

Another, Kelong FC116 in Pasir Ris, appealed for funds on crowdfunding website Indiegogo yesterday to keep operating after losing more than 20 tonnes of fish. It is the second farm to look for help online, following in the footsteps of Ah Hua Kelong.

Between Saturday and last night, Ah Hua Kelong had managed to raise more than $16,000.

Marine life has also been found washed up along the shores of Pasir Ris Beach and near the Sungei Buloh Wetland Reserve Extension.

Dr Diana Chan, course manager for the diploma in veterinary technology at Temasek Polytechnic's School of Applied Science, said the concentration of farms in Changi and their close proximity to each other could create a situation in which water cannot flow freely.

A plankton bloom is caused by various factors like warm temperatures and high nutrients leading to lower levels of dissolved oxygen. It happens worldwide, including in countries such as Malaysia and the Philippines, say experts.

Associate Professor Federico Lauro from the Asian School of the Environment at the Nanyang Technological University said the micro-organisms can double every three to four hours.

"With a better understanding of the many factors leading to a bloom, scientists should be able to provide risk assessment tools for the conditions leading to a bloom. We are just not at that stage yet."

Still, farmers can brace themselves for such eventualities by employing systems to monitor dissolved oxygen and nutrient levels, said Mr Chan Wei Loong, programme chair of Republic Polytechnic's diploma in marine science and aquaculture.

Even though when a plankton bloom occurs is "anyone's guess", a trained person will know how to read this information and be prepared for it, he said.

1 comment:

  1. Pasir Ris is U-shape. Naturally the concave area nearer to mainland shore does not get enough flushing as tide changes.
    I believe Serangoon Reservoir added to the problem. The dam blocked off water from the concave area into the river/canal, thus not allowing enough fresh seawater into the concave area during high tide. And at low tide, there are no river/canal water to flush through the concave area and out to the sea.
    Serangoon Reservoir was damned in 2009, and major fish death was first reported (I think) in 2009.
    I guess moving to somewhere with stronger tide is the only solution.

    ReplyDelete