Lake Naivasha fishermen want the Nakuru government to arrest people using the hook and line method.
The Kenya Marine and Fisheries Research Institute has said the method is illegal and is on the rise, especially in the South Lake region.
Kemfri researcher James Last yesterday said the fishing system could hurt production.
He said the method is used on the shores of the lake and in breeding areas.
“Some fishermen and poachers have reverted to using the hook and line method in which they use ugali to trap the fish and this is worrying,” he said.
Last said large fish, mainly brooders, are getting caught and polluting the water body. “The method is very attractive as compared to the use of nets. We have seen licensed fishermen opting for it,” he said.
Last said water hyacinth, which has covered many landing beaches, has stagnated.
“Cases of illegal fishing are very high and the biggest challenge facing this water body is the papyrus weed and not the water hyacinth,” he said.