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Round Goby and Mottled Sculpin Spawning Interactions

OBJECTIVES: (1) Determine whether round gobies interfere with mottled sculpin spawning. (2) Compare/contrast nest site selection in round gobies and mottled sculpins to find ways in which habitats can be modified to minimize round goby reproduction while protecting/enhancing mottled sculpin reproduction. METHODOLOGY: (1) In situ cage experiments with spawning mottled sculpins and male round gobies. (2) Field study to compare round goby and mottled sculpin nest site characteristics. (3) Field experiment to verify species specific shelter differences and develop habitat alteration methods to minimize round goby reproduction while protecting mottled sculpin reproduction. RATIONALE: As an important prey item, mottled sculpins are an important component in the Great Lakes food chain. The round goby has severely impacted mottled sculpin populations. We have gathered evidence that mottled sculpins have failed to reproduce for three years at Calumet Harbor (Lake Michigan), despite the presence of gravid fish. We propose to determine whether this is due to round gobies and find ways to minimize the round goby impact.

Status
In progress
Type
Project
Start Date
End Date
Scope of Study
Field Investigation
Scale of Phenomena
Community
Population
Lake Basin Connecting Channels
Lake Michigan
State Province
Illinois
Indiana
Biology And Life History
Environmental Requirements / Tolerance
Control And Mitigation
Habitat Manipulation
Ecosystem Effects
Predator / Prey Interactions
Annex Numbers
Research & Development
Annex 17
Impact of water quality and AIS on fish and wildlife populations and habitats
General
Aquatic Nuisance Species
Annex
  • Annex Numbers
    Annex Numbers
    Research & Development
  • Annex 17
    Annex 17
    Impact of water quality and AIS on fish and wildlife populations and habitats

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Great Lakes - St. Lawrence Region.