A Professor of Fisheries at the Ahmadu Bello University, Zaria, Mr Paul Bolorunduro has alerted Nigerians to the dangers of cross-breeding different species of fish as practiced by local fish farmers in the country, News Agency of Nigeria reports.
Bolorunduro said this on Tuesday, June 5, while explaining that the cross-breeding technique was harmful to human consumption and should be handled with utmost care.
In his remarks: “We have had several cross-breeding of fish species in Nigeria that have been successful.
“We cross-bred catfish from different species and they produced an offspring we call heteroclarias.
“But the only caution in cross-breeding fish is that these hybrid fish can result in ecological disasters.
“It has happened in the United States, where a particular hybrid fish of the catfish family eventually caused major obstructions in their waterways.”
In the same vein, the Professor also decried the use of uncontrolled chemical additives to feed fish.
He said, “Just like in organic crop agriculture, it is better to feed fish without excess chemical additives in the fish feed.
“There is a huge difference between the naturally-bred fish and the chemically-bred fish in the colour of the fish skin and even in their taste.
“There are chemical deposits in the chemically-bred fish, and when humans consume the fish without knowing, what is called biological modification occurs which is more terrible on the consumers than on the fish.”
Bolorunduro, however, noted that the move for low chemical-based feed among local fish farmers is being initiated.
“We are promoting low-based chemical application because we cannot do without some of these chemical ingredients but for bio-security reasons and for human health, we try to de-emphasise it,” he added.