Biomanipulating streams: a supplementary tool in lake restoration

Research output: Contribution to journalArticle


title = "Biomanipulating streams: a supplementary tool in lake restoration",
abstract = "Removal of cyprinid fish is a widely used biomanipulation tool to transform turbid shallow eutrophic lakes in north temperate regions into a clear water state. We here evaluate the removal of cyprinids from streams as a supplement to lake fishing. Since cyprinids often aggregate in high densities in lake inlet/outlet streams during winter migration, removal of fish in this space-confined habitat may be cost-efficient as compared to fish removal in the lake habitat. In two consecutive years, we annually removed up to 35% of the dominant cyprinids from an inlet stream to a lake and argue that this could easily be increased with a more targeted fishing effort. Concurrently, we monitored species- and length-specific variation in migration propensity, to explore how this relates to efficient fish removal. Smaller planktivores generally had a much higher migratory propensity than larger benthivores. Hence, stream fishing specifically targets species and size groups that are less efficiently controlled with traditional lake fishing methods. As a rule of thumb, stream fishing is most efficient when water temperature is 2–6°C. Prior to implementing fish removals from streams, the potential evolutionary consequences of the targeted removal of migratory phenotypes should be considered.",
keywords = "Cost-effective, Cyprinid fishes, Evolutionary consequences, Fish removal, Migration",
author = "Christian Skov and Hansen, {Joan H.} and Henrik Baktoft and Jakob Brodersen and Christer Br{\"o}nmark and Hansson, {Lars Anders} and Kaj Hulth{\'e}n and Chapman, {Ben B.} and Nilsson, {P. Anders}",
year = "2019",
month = feb,
doi = "10.1007/s10750-018-3832-4",
language = "English",
volume = "829",
pages = "205--216",
journal = "Hydrobiologia",
issn = "0018-8158",
publisher = "Springer",
number = "1",