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Estimating double-crested cormorant predation and its potential effects on fish populations in Lake Ontario

Expanding numbers of double-crested cormorants (Phalacrocorax  auritus) nesting throughout the Great Lakes region have created  considerable concern among state and federal fishery management  agencies and sportsmen relative to impacts on fish populations.   Limited information exists on the diet composition and consumption  rates of cormorants the the Great Lakes region and even less is  known regarding the effects of this depredation on fish  populations.  This study examines the diet composition, fish  consumption, and potential impacts of Lake Ontario and St. Lawrence  River nesting colonies on important native fish species (i.e.  smallmouth bass, yellow perch) .

Status
In progress
Type
Project
Start Date
End Date
Researchers
Robert RossPrincipal Investigator
Associated with 1 projects
James JohnsonResearcher
Associated with 2 projects
Agencies
U.S. Geological Survey $ 50,000.00USDEstimates

Funding 13 projects for a total of $538,321.00
Scope of Study
Field Investigation
Laboratory Investigation
Scale of Phenomena
Community
Ecosystem
Organism
Population
Impact of Pollutants
Exotic Species
Processes
Natural Ecological Processes
Resource Management
Fisheries
Wildlife
State Province
New York
Ontario
Purpose of Project
Resource Management
Frequency
Annual
Number of Sampling Entities
5-9
Data Availability
Digital
Region Being Monitored
Near and OpenShore Waters
Resource Being Monitored
Fisheries
Wildlife
Ecosystem Effects
Community Structure
Prevention and Introduction
Identification of Potential Invaders
Spread of Established ANS Populations
Mechanisms of Spread
Annex Numbers
Research & Development
Annex 17
Physical and transformational processes affecting delivery of pollutants
General
Monitoring
Aquatic Nuisance Species
Annex
  • Annex Numbers
    Annex Numbers
    Research & Development
  • Annex 17
    Annex 17
    Physical and transformational processes affecting delivery of pollutants

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