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FORECASTING ECOSYSTEM EFFECTS OF HEMIMYSIS ANOMALA IN LAKE ONTARIO

Hemimysis anomala, a littoral mysid, was found in 2  6 in Lakes   Ontario and Michigan.  In Europe, their effects on zooplankton and   the recipient ecosystems have ranged from marginal to severe, but   their basic biology, distribution, and role in Great Lakes food webs   is largely unknown.  Preliminary work from Lake Ontario indicates   that Hemimysis has a high potential to impact nearshore foodwebs.    Ongoing efforts by multiple agencies have confirmed presence of the   species lakewide at depths <1  m, but quantitative information about   seasonal and depth distribution is lacking.  Our project goal is to   assess the potential for food web disruption in the nearshore of the   Great Lakes, using Lake Ontario as a model system.  Our objectives   are to evaluate trophic relationships among juvenile and adult   Hemimysis and their predators and prey to facilitate understanding   potential effects Hemimysis on native and invasive zooplankters and   nearshore fishes, and to evaluate if characteristics of Hemimysis   life history that have made them successful invaders in European   waters will be similar in the Great Lakes.  We plan to integrate the   results of laboratory experiments on habitat preferences with field-  collected data to test model predictions of behavior and habitat   use.  Samples (Hemimysis, zooplankton, fish) will be collected   monthly during May-October in each year.  Available habitat in the   areas sampled will be assessed with underwater observation.  We will   also evaluate the possibility of using high frequency acoustics to   assess Hemimysis abundance.  Field caught animals will be used to   determine population characteristics of Hemimysis and for stable   isotope determination of potential zooplankton prey, juvenile and   adult Hemimysis, and fish predators.  The combination of laboratory   and field tests of behavior and habitat preferences and analysis of   life history traits will allow us to better understand ongoing   impacts of the species in Lake Ontario and predict the relative risk   of population expansion of Hemimysis within the Great Lakes, as well   as its?potential to colonize inland lakes.

Status
In progress
Type
Project
Start Date
End Date
Scope of Study
Field Investigation
Scale of Phenomena
Community
Ecosystem
Organism
Population
Impact of Pollutants
Exotic Species
Resource Management
Fisheries
Lake Basin Connecting Channels
Lake Ontario
State Province
New York
Ontario
Biology And Life History
Population Dynamics
Ecosystem Effects
Predator / Prey Interactions
Spread of Established ANS Populations
Improvement of Initial Detection
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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up-to-date information about research projects in the
Great Lakes - St. Lawrence Region.