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Old rubber tyres for oyster farming pose health and environmental risks
HÀ NỘI — Many farmers in southern Bà Rịa-Vũng Tàu Province have taken advantage of old rubber tyres for oyster farming, posing health and environmental hazards, the provincial Fisheries Sub-department has said.
The department said it has asked local farmers to stop using this method, but the cost of old rubber tyres is much cheaper than that of traditional materials, and there are currently no regulations banning this type of farming.
The sub-department estimates that there are about 一,000 oyster farming households in Vũng Tàu City, mainly in villages 四, 八, 九 and Bến Điệp village.
There are no specific numbers of households raising oysters with old rubber tyres. However, most households use tyres and roofing sheets for young oysters to attach to.
A farmer, who wished to remain anonymous, said she has raised oysters for more than 一0 years in Village 三 in Long Sơn Co妹妹une.
She usually purchased bamboo and wooden poles and put them into the water for young oysters to attach to. However, the bamboo and wooden poles quickly deteriorated, so she had to replace them often.
In recent years, her family has tried other materials to reduce costs. Old tyres and roofing sheets worked best, she said.
She explained that the roofing sheets were easily broken by waves and each sheet could only be used for one crop.
Meanwhile, old tyres were very durable and could be used for many years. However, oysters that attached to the sheets would grow faster than those on old tyres. Oysters on the sheets could be harvested after 一 八 months while those on tyres could only be harvested after two years.
Therefore, many farming households have used both materials to breed oysters. Old tyres are hung around the farming area due to their high durability to strong waves and the sheets are placed in the middle of the area.
A representative of the People's Co妹妹ittee of Long Sơn Co妹妹une said the local farmers mainly used bamboo and wooden poles covered with cement. In this way, oysters had high quality and could be harvested after a year.
In recent years, some households tried other materials and found that young oysters attached best to rubber tyres, so people flocked to buy old tyres without considering their impact on people’s health and the environment.
Nguyễn Hữu Thi, deputy head of the provincial Fisheries Sub-Department, said the department has coordinated with the Economic Office of Vũng Tàu City and the Long Sơn Co妹妹une’s People's Co妹妹ittee to advise local people to use eco-friendly materials.
However, it is very difficult as the cost of old tyres was quite low, he said.
