Thailand has netted more than 1.3 million kilograms of highly destructive blackchin tilapia fish, the government said yesterday, as it battles to stamp out the invasive species.
Shoals of blackchin tilapia, which can produce up to 500 young at a time, have been found in 19 provinces, damaging ecosystems in rivers, swamps and canals by preying on small fish, shrimp and snail larvae.
As well as the ecological impact, the government is worried about the effect on the kingdom’s crucial fish-farming industry.
Photo: AFP
Fishing authorities caught 1,332,000kg of blackchin tilapia from February to Wednesday last week, said Nattacha Boonchaiinsawat, vice president of a parliamentary committee set up to tackle the spread of the fish.
“We talked to local residents and found out that the spread of tilapia has got worse — they found them in small canals, which was not the case before,” Nattacha said.
The outbreak of tilapia would cost the Thai economy at least 10 billion baht (US$292 million), he said.
The fish, native to West Africa, were first discovered in Thailand’s rivers in 2010 before spreading rapidly in 2018, and are now also found in the US state of Florida and in the Philippines.
In July, the Thai government declared the eradication of the species a national priority and began encouraging people to consume the fish.
Promotional activities in Phetchaburi Province advertised tilapia-based fish sauces and sausages.
Restaurants have also increasingly used the fish in cuisine, fried with garlic or sun-dried.
It remains unclear how the fish arrived in Thailand, but local media reports have said they could have been imported by a company from Ghana in 2010.
A parliamentary investigation is under way to determine the cause of the infestation, Nattacha said.
The Thai government has encouraged locals to catch the fish, offering to pay people 15 baht per kilogram.
It has also designated 75 vending areas around the country where the fish can be sold.
Authorities have released predator species to hunt down the tilapia and are also developing genetically modified blackchin tilapia to produce sterile offspring.
A UN science panel last year warned that the tilapia are spreading faster than ever, wrecking crops, distributing disease and upending ecosystems.
More than 37,000 alien species have taken hold far from their places of origin, costing upwards of US$400 billion a year in damages and lost income, the panel said.
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