University of Antwerp Survey of CMC Impact on Anglers

The Chinese mitten crab, an exotic invasive species, is being observed with increasing frequency in Flanders. New measurements using crab traps reveal that very large numbers are present in our rivers. Moreover, people are coming into contact with this species more and more often. Its impact is being felt by both nature and humans. The crab damages underwater structures, destroys aquatic plants, and causes harm to fishing gear — significantly spoiling what should be a relaxing day by the water for anglers. To better understand the impact of this species on anglers, the University of Antwerp is launching a new study. "Anglers are on the front lines when it comes to observing what’s happening in our waterways," says researcher Jonas Schoelynck. "They are, in a sense, the ears and eyes of our rivers, and often the first to experience the negative effects of the mitten crab’s presence." The damages reported by anglers range from additional costs — such as the loss of bait and damaged equipment — to disruptions in their leisure activities. Moreover, the crabs can also destabilize the ecosystem, which could potentially harm fish populations themselves. Schoelynck continues: "There are many stories circulating about the damage anglers are experiencing. Through this survey, we aim to objectively map out this information: how frequent and how severe is the damage?" The study is being conducted via an online survey, asking anglers about their experiences, the number of crabs caught, and the locations where they encounter them. This will allow problem areas to be accurately mapped.

Photos: Oscar Schoelynck