Effect of triploid grass carp on the aquatic macrophyte community of Devils Lake, Oregon

Scott A. Bonar, Gary Thomas, Steven L. Thiesfeld, Gilbert B. Pauley, T. Brock Stables

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Two years after stocking 274-hectare Devils Lake, Oregon, with 27, 090 triploid grass carp Ctenopharyngodon idella (180 fish/vegetated hectare, 6.1 fish/tonne wet vegetation), the total volume of vegetation declined by 30%, whereas the total vegetation biomass increased, primarily from the expansion of short, compact communities of Brazilian water-weed Egeria densa. Comparison of the open lake with areas protected by net barriers, and the results of grass carp feeding preference experiments, suggested that the increased dominance of E. densa was caused by factors other than selective feeding. Furthermore, as the grass carp grew, they seemed to slow the invasion of E. densa and to help maintain species diversity in the plant community. Feeding experiments suggested that food preference was related to grass carp size, which should be considered when evaluating control of target plant species. Grass carp can provide economical and effective control of plants in cool northern waters, although stocking rates will have to be higher than those used in warm waters of the southern United States.

Original languageEnglish (US)
Pages (from-to)757-765
Number of pages9
JournalNorth American Journal of Fisheries Management
Volume13
Issue number4
DOIs
StatePublished - Jan 1 1993
Externally publishedYes

Fingerprint

aquatic communities
Ctenopharyngodon idella
triploidy
macrophyte
grass
Egeria densa
lakes
lake
vegetation
food preference
fish
warm water
feeding preferences
weed
protected area
plant community
species diversity
Southeastern United States
food choices
stocking rate

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Aquatic Science
  • Ecology
  • Management, Monitoring, Policy and Law

Cite this

Effect of triploid grass carp on the aquatic macrophyte community of Devils Lake, Oregon. / Bonar, Scott A.; Thomas, Gary; Thiesfeld, Steven L.; Pauley, Gilbert B.; Stables, T. Brock.

In: North American Journal of Fisheries Management, Vol. 13, No. 4, 01.01.1993, p. 757-765.

Research output: Contribution to journalArticle

Bonar, Scott A. ; Thomas, Gary ; Thiesfeld, Steven L. ; Pauley, Gilbert B. ; Stables, T. Brock. / Effect of triploid grass carp on the aquatic macrophyte community of Devils Lake, Oregon. In: North American Journal of Fisheries Management. 1993 ; Vol. 13, No. 4. pp. 757-765.
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