The joint study of the Natural Resources Institute Finland (Luke) and University of Jyväskylä estimated the impact of cormorants breeding and living in Quark on perch populations and catches in the area. A large number of breeding cormorants in the important perch fishing and reproduction areas may reduce perch populations and catches especially in areas affected by breeding. On a larger spatial scale, the impact of cormorant predation is lower. The study was published in the ICES Journal of Marine Science in August 2020.
Click here for original story, Cormorant predation may reduce perch catches, especially close to breeding areas
Source: Phys.org