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MOVEMENT PATHWAYS AND BEHAVIOUR OF SEA LAMPREY AROUND TRAPS IN THE ST.MARYS RIVER

The Great Lakes Fishery Commission has pledged to intensify its  efforts to trap spawning-run sea lamprey for control purposes.   Increasing trapping efficiency in larger systems has been identified  as an important research need.  Understanding the movement pathways   and behaviour of sea lamprey in the vicinity of traps is vital to  improving capture success. Our overarching research goal is to  determine whether sea lamprey exhibit behaviours that facilitate or  impede efforts to trap them.      We will evaluate this goal by testing:  (i) whether sea lamprey approaching a trap adopt a path of least  resistance with respect to water flow by confining their movement to  boundary layers along the shore or bottom of the tributary, or whether  they exhibit the pronounced upward and downward motion observed   when they approach the mouth of a tributary and   (ii) whether individuals, or classes of individuals, differ in their  migratory approach to trapping locations, and in their behaviour   near traps, in ways that influence their encounter rate with traps,  the duration for which they are available to be trapped (within and  across days), and their susceptibility to being captured and retained  within a trap. Study animals will consist of fertile animals trapped   previously in the St. Marys traps, as well as sterilized males from  the Sterile Male Facility.      In each of two study years, approximately 3  animals will be tagged  and tracked using acoustic telemetry to rigorously quantify pathways  of approach and departure from trap locations. Up to 1    additional  lamprey will be PIT tagged and monitored more coarsely near (< 1 m)  traps to assess their susceptibility to trapping.  Underwater video  and PIT tagging will be combined to assess the efficiencies of trap  entry and retention on an individual basis. This research addresses  the Great Lakes Fishery Commissions desire to improve trapping for  control purposes. The research will develop the lamprey tracking   expertise needed to carry out more detailed, field studies that test  and apply the numerical fish surrogate approach (Goodwin et al. 2  6,  ERDC/EL- 6, US Army Research and Development Center, Vickburg, MS) to  sea lamprey.     (sea lamprey); (sea lampreys); (aquatic nuisance species); (ANS);  (AIS); (aquatic invasive species)

Status
In progress
Type
Project
Start Date
End Date
Scope of Study
Field Investigation
Scale of Phenomena
Organism
Processes
Natural Ecological Processes
Resource Management
Fisheries
Lake Basin Connecting Channels
Lake Huron
State Province
Michigan
Ontario
Spread of Established ANS Populations
Predictive Models
Socio-economic Consideration and Analysis
Resource Management Issues
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.