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POST-STOCKING BEHAVIOUR, HABITAT USE, AND SURVIVAL OF HATCHERY-REARED NATIVE FISHES USING ACOUSTIC TELEMETRY

Until the mid-1950’s, a diverse assemblage of deepwater ciscoes including bloater (Coregonus hoyi) inhabited Lake Ontario. Currently, only the shallow-water form of Cisco (C. artedi) remains. The Lake Ontario Committee has established a plan to reestablish a self-sustaining deepwater cisco population within 25 years. The work is supported by the Lake Ontario FCOs and guided by the Strategies for the Reestablishment of Native Deepwater Ciscoes in Lake Ontario. As part of this initiative, fertilized Lake Michigan bloater eggs have been collected by the USFWS, raised to juvenile stages in New York and Ontario, and stocked in small numbers (16-35 thousand/year). With improvements to wild egg collections (1.95 million fertilized eggs in 2016) and significant progress in brood stock development, the plan to stock 500,000 juveniles per year may soon be possible. The issue is that we do not know what will happen to the stocked fish after introduction, a problem for all stocked fish. Do hatchery fish survive in the wild and does survival change through time? Is predation a significant component of mortality and does it vary seasonally? Do stocked bloater quickly disperse or stay close to their stocking site? Do they school closely together and move as a group? What factors influence their seasonal habitat use? Answering these questions is the focus of this proposal and the findings can be applied to develop more effective monitoring of stocked fish, identify survival bottlenecks and optimize culture and stocking strategies. The methodology, acoustic telemetry, will pave the way for development of comparative stocking and culture initiatives (other life-stages, seasons, locations, culture conditions) to inform and improve bloater restoration outcomes that could potentially be applied to other species (e.g., cisco, salmonids) and issues in the Great Lakes (e.g. understanding post-stocking survival , habitat associations and protection, improved monitoring).

Status
In progress
Type
Project
Project Database
Start Date
End Date
Researchers
Chip WeselohResearcher
Associated with 9 projects
Agencies
Array $ 12,121.00USDEstimates

Funding 3 projects for a total of $15,252.00
Scope of Study
Aerial Photo Interpretation
Education and outreach
Scale of Phenomena
Biochemical
Population
Impact of Pollutants
Exotic Species
Nutrients, Including Phosphorus
Processes
Natural Ecological Processes
Land Use and Habitat
Uplands
Socio-Economic
Economic Instruments Study
Resource Management
Forestry
Lake Basin Connecting Channels
Lake Erie
Out of Basin
State Province
Michigan
Purpose of Project
Loadings Determination
Trend Assessment
Frequency
Annual
Number of Sampling Entities
250-399
Data Availability
Digital
Geo-referenced
Region Being Monitored
Coastal Wetlands
Tributary Mouth
Resource Being Monitored
Agricultural Land Use
Fisheries
Program Drivers
Fish Consumption Advisories
Integrated Atmospheric Deposition Network
Beneficial Use Impairment Assessments
Fish Tumours or Other Deformities
Restrictions on Drinking Water Consumption or Taste and Odour Problems
Tainting of Fish and Wildlife Populations
Biology And Life History
Biomanipulation
Control And Mitigation
Biological Interactions (Predator/Prey)
Ecosystem Effects
Community Structure
Prevention and Introduction
Definition of Vectors of Introduction
Spread of Established ANS Populations
Range of Spread
Socio-economic Consideration and Analysis
Water Use - Agricultural, Industrial, Municipal
Annex Numbers
Airborne Toxic Substances
Discharges from Onshore and Offshore Facilities
Discharges of Vessel Wastes
Annex 17
Control technologies for treatment of municipal and industrial effluents/emissions
Ecotoxicity and toxicity effects of pollutants related to developing Annex 1 specific objectives
Effects of varying lake levels and relation to pollution sources, fate and effects
General
Monitoring
Aquatic Nuisance Species
Annex
  • Annex Numbers
    Annex Numbers
    Airborne Toxic Substances
    Discharges from Onshore and Offshore Facilities
    Discharges of Vessel Wastes
  • Annex 17
    Annex 17
    Control technologies for treatment of municipal and industrial effluents/emissions
    Ecotoxicity and toxicity effects of pollutants related to developing Annex 1 specific objectives
    Effects of varying lake levels and relation to pollution sources, fate and effects

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