Quantifying Summer Residency and Variation in Diel Behaviors of Lake - - PowerPoint PPT Presentation

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Quantifying Summer Residency and Variation in Diel Behaviors of Lake - - PowerPoint PPT Presentation

Oct 30, 2022 337 likes •604 views

Quantifying Summer Residency and Variation in Diel Behaviors of Lake Sturgeon in Buffalo Harbor, NY Neuenhoff, R.D.*, L.D. Davis J.L. Withers, J.A. Sweka U.S. Fish and Wildlife Service, Northeast Fisheries Center, Lamar, Pennsylvania, 16848 What

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Quantifying Summer Residency and Variation in Diel Behaviors of Lake Sturgeon in Buffalo Harbor, NY

Neuenhoff, R.D.*, L.D. Davis J.L. Withers, J.A. Sweka U.S. Fish and Wildlife Service, Northeast Fisheries Center, Lamar, Pennsylvania, 16848

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What are the fine and large scale movements and behaviors of Lake Sturgeon? Immediate: Identify likely spawning sites Longterm: Inform a sampling design

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  • 1. Quantify seasonal and diel behaviors with respect

to bathymetry (ie, depth)

  • 2. Determine seasonal behaviors with respect to

position (ie, movement)

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Movement and Behavior

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SLIDE 7 http://www.ngdc.noaa.gov/mgg/greatlakes/lakeerie_cdrom/images/a9_pg.jpg

Timestamp Temperature Depth

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Covariates Effect Month Fixed Month Random Hour of Day Random Quarter of Day Fixed Quarter of Day Random Fish Status Fixed Fish Status Random Length Fixed Length Random

Model Selection

Depth ~ FE: Time of Day * RE: Individual * Month of Year

Random effects: Variance Std.Dev. Groups Individual 3.637 1.907 Residual 3.588 1.894

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(m)

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Arriving/Spawning in harbor

(m)

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MAY JUNE JULY AUG SEPT

(m)

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MAY

(m)
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JUNE

(m)
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JULY

(m)
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AUG/ SEPT

(m)
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MAY JUNE

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JULY AUG/SEPT

(m) (m)
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  • 1. Depth preference?

Seasonal Individually Variable

  • 2. Movement preferences?

Seasonal Individually Variable

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SPAWNERS? RECOVERY? STAGING?

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Depth alone not adequate proxy Likely spawning site(s) in upper river Movement behaviors can better inform sampling design

Photo credit: techalive.mtu.edu
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Egg Mats

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Acknowlegements

  • Great Lakes Restoration Initiative (GLRI)
  • Great Lakes Acoustic Telemetry Observation System (GLATOS)
  • Buffalo State University of New York
  • Michigan Department of Natural Resources
  • New York State Department of Environmental Conservation
  • Ohio Department of Natural Resources
  • Ontario Ministry of Natural Resources
  • Pennsylvania Fish and Boat Commission
  • U.S. Army Corps of Engineers
  • U.S. Coast Guard
  • U.S. Fish and Wildlife Service, Alpena Fish and Wildlife Conservation Office
  • U.S. Fish and Wildlife Service, Lower Great Lakes Fish and Wildlife Conservation

Office