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TESTING ASSUMPTIONS REQUIRED TO ESTIMATE LAKE-WIDE PARASITIC SEA LAMPREY ABUNDANCE

Sea lamprey population control and assessment could be improved by increased understanding of ecology and population dynamics between parasitic and spawning phases. For example, understanding factors that influence timing of entry into spawning streams could guide development of interception trapping. Further, accurate estimates of lake-wide parasitic sea lamprey abundance could an objective evaluation of control-program effectiveness. Previous attempts to estimate the number of parasitic sea lampreys in a lake resulted in estimates that were biased (inaccurate) because key assumptions were violated. We consider each assumption as a research question to be evaluated prior to implementing lake-wide mark-recapture (e.g., using coded-wire tagged sea lampreys). If assumptions are supported, mark-recapture methods may provide estimates of lake-wide adult sea lamprey abundance. Acoustic telemetry will be used at two life stages (parasitic juvenile and adult) to address the determine if: (1) timing of stream entry is related to stream water level, stream water temperature, lake water temperature, or photoperiod; (2) survival to stream entry is related to release location; (3) spawning stream selection is related to release location; and (4) acoustic tagging affects survival. Acoustic receivers (Vemco VR2W; 69 and 180 kHz) in 15 Lake Erie tributaries, incl. Detroit R., will provide time and direction of tributary entry and exit. Lampreys will be implanted with coded wire and acoustic tags and released at 7 locations in L. Erie in early winter (parasitic juveniles) and early spring (adults) 2015-16, 2016-17, and 2017-18.

Status
In progress
Type
Project
Start Date
End Date
Scope of Study
Field Investigation
Scale of Phenomena
Organism
Population
Processes
Natural Ecological Processes
Resource Management
Fisheries
Lake Basin Connecting Channels
Detroit River
Lake Erie
State Province
Michigan
New York
Ohio
Ontario
Purpose of Project
Program Effectiveness / Regulatory
Resource Management
Special Survey
Frequency
Daily
Number of Sampling Entities
50-99
Data Availability
Digital
Geo-referenced
Region Being Monitored
Near and OpenShore Waters
Tributary Mouth
Resource Being Monitored
Fisheries
Biology And Life History
Population Dynamics
Control And Mitigation
Consequences of Control
Spread of Established ANS Populations
Range of Spread
Socio-economic Consideration and Analysis
Resource Management Issues
General
Monitoring
Aquatic Nuisance Species

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