- I'm surprised it's so much. What I think is that it is the net fisherman, where nets are lost and remain on the bottom. Fish get caught in the nets and that is of course not good, says Roger Ivarsson, from the Mjölby Fisheries Association.

It is the Marine and Water Authority that now wants to investigate the market for fishing equipment through a survey. The questions, which are aimed at recreational fishermen and professional fishermen, are among other things about how fishing equipment is purchased and how it is discarded.

- In Svartån in Mjölby there are many branches and debris on the bottom, which the traits get stuck in and the lines go off. Well, that's what equipment I see remains on the bottom, says Roger Ivarsson.

"Has retained fishing equipment for 30 years back"

At the same time, he says that he usually doesn't get rid of his fishing gear.

- I don't throw anything away, I have left things for 20-30 years back. If I throw something I throw it at a recycling station, it's usually metal, he says.

Mjölby Fiskevårdsförening is a non-profit association that leases water from Mjölby municipality.

- All money that comes in goes back to the municipality's water. We put fish in the Skogssjön and Svartån for about SEK 100,000 a year, says Roger Ivarsson.