Biomanipulating streams

a supplementary tool in lake restoration

Christian Skov*, Joan H. Hansen, Henrik Baktoft, Jakob Brodersen, Christer Brönmark, Lars Anders Hansson, Kaj Hulthén, Ben B. Chapman, P. Anders Nilsson

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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.

Original languageEnglish
JournalHydrobiologia
Volume829
Pages (from-to)205-216
ISSN0018-8158
DOIs
Publication statusPublished - 1 Jan 2019

Keywords

  • Cost-effective
  • Cyprinid fishes
  • Evolutionary consequences
  • Fish removal
  • Migration

Cite this

Skov, C., Hansen, J. H., Baktoft, H., Brodersen, J., Brönmark, C., Hansson, L. A., ... Nilsson, P. A. (2019). Biomanipulating streams: a supplementary tool in lake restoration. Hydrobiologia, 829, 205-216. https://doi.org/10.1007/s10750-018-3832-4
Skov, Christian ; Hansen, Joan H. ; Baktoft, Henrik ; Brodersen, Jakob ; Brönmark, Christer ; Hansson, Lars Anders ; Hulthén, Kaj ; Chapman, Ben B. ; Nilsson, P. Anders. / Biomanipulating streams : a supplementary tool in lake restoration. In: Hydrobiologia. 2019 ; Vol. 829. pp. 205-216.
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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.",
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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}",
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Skov, C, Hansen, JH, Baktoft, H, Brodersen, J, Brönmark, C, Hansson, LA, Hulthén, K, Chapman, BB & Nilsson, PA 2019, 'Biomanipulating streams: a supplementary tool in lake restoration', Hydrobiologia, vol. 829, pp. 205-216. https://doi.org/10.1007/s10750-018-3832-4

Biomanipulating streams : a supplementary tool in lake restoration. / Skov, Christian; Hansen, Joan H.; Baktoft, Henrik; Brodersen, Jakob; Brönmark, Christer; Hansson, Lars Anders; Hulthén, Kaj; Chapman, Ben B.; Nilsson, P. Anders.

In: Hydrobiologia, Vol. 829, 01.01.2019, p. 205-216.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Biomanipulating streams

T2 - a supplementary tool in lake restoration

AU - Skov, Christian

AU - Hansen, Joan H.

AU - Baktoft, Henrik

AU - Brodersen, Jakob

AU - Brönmark, Christer

AU - Hansson, Lars Anders

AU - Hulthén, Kaj

AU - Chapman, Ben B.

AU - Nilsson, P. Anders

PY - 2019/1/1

Y1 - 2019/1/1

N2 - 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.

AB - 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.

KW - Cost-effective

KW - Cyprinid fishes

KW - Evolutionary consequences

KW - Fish removal

KW - Migration

U2 - 10.1007/s10750-018-3832-4

DO - 10.1007/s10750-018-3832-4

M3 - Journal article

VL - 829

SP - 205

EP - 216

JO - Hydrobiologia

JF - Hydrobiologia

SN - 0018-8158

ER -