Biomanipulating streams : a supplementary tool in lake restoration
(2019) In Hydrobiologia 829(1). p.205-216- 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... (More)
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.
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- author
- Skov, Christian LU ; Hansen, Joan H. ; Baktoft, Henrik ; Brodersen, Jakob LU ; Brönmark, Christer LU ; Hansson, Lars Anders LU ; Hulthén, Kaj LU ; Chapman, Ben B. LU and Nilsson, P. Anders LU
- organization
- publishing date
- 2019-02
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Cost-effective, Cyprinid fishes, Evolutionary consequences, Fish removal, Migration
- in
- Hydrobiologia
- volume
- 829
- issue
- 1
- pages
- 12 pages
- publisher
- Springer
- external identifiers
-
- scopus:85057100636
- ISSN
- 0018-8158
- DOI
- 10.1007/s10750-018-3832-4
- language
- English
- LU publication?
- yes
- id
- b4675e6d-d514-4b6a-a083-ae476ee9ed12
- date added to LUP
- 2018-12-05 10:49:30
- date last changed
- 2024-03-02 14:00:36
@article{b4675e6d-d514-4b6a-a083-ae476ee9ed12, abstract = {{<p>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.</p>}}, author = {{Skov, Christian and Hansen, Joan H. and Baktoft, Henrik and Brodersen, Jakob and Brönmark, Christer and Hansson, Lars Anders and Hulthén, Kaj and Chapman, Ben B. and Nilsson, P. Anders}}, issn = {{0018-8158}}, keywords = {{Cost-effective; Cyprinid fishes; Evolutionary consequences; Fish removal; Migration}}, language = {{eng}}, number = {{1}}, pages = {{205--216}}, publisher = {{Springer}}, series = {{Hydrobiologia}}, title = {{Biomanipulating streams : a supplementary tool in lake restoration}}, url = {{http://dx.doi.org/10.1007/s10750-018-3832-4}}, doi = {{10.1007/s10750-018-3832-4}}, volume = {{829}}, year = {{2019}}, }