.S. Department of the Interior .S. Geological Survey General Principles General Principles of Telemetry Studies of Telemetry Studies Theresa L. Liedtke Western Fisheries Research Center Columbia River Research Laboratory urgical Techniques Workshop, September 4, 2011
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U.S. Department of the Interior U.S. Geological Survey General Principles of Telemetry Studies Theresa L. Liedtke Western Fisheries Research Center Columbia.
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U.S. Department of the InteriorU.S. Geological Survey
General Principles General Principles of Telemetry Studiesof Telemetry Studies
Theresa L. Liedtke
Western Fisheries Research Center Columbia River Research Laboratory
Surgical Techniques Workshop, September 4, 2011
Workshop Approach
Recently completed AFS book chapter on tagging techniques
Follow outline in chapter
GoalGoal Provide background and frameworkProvide background and framework
• Light touch on broad topicsLight touch on broad topics• Later talks provide detailsLater talks provide details
• General recommendationsGeneral recommendations
OutlineOutline• Background on my perspectiveBackground on my perspective• Telemetry study assumptionsTelemetry study assumptions• General PrinciplesGeneral Principles
BackgroundBackground Telemetry studies in Telemetry studies in
Columbia River BasinColumbia River Basin Largest known telemetry Largest known telemetry
It’s a matter of scale...or is it?It’s a matter of scale...or is it? My study is smaller scale, so I don’t My study is smaller scale, so I don’t
need all this stuff!need all this stuff!
A study with n=1 makes the same basic A study with n=1 makes the same basic assumptions assumptions
If you want to make inferences to the If you want to make inferences to the untagged population untagged population (and you know you do!) (and you know you do!) consider these principlesconsider these principles
Monitor Tagged fish
DescribeUntagged fish
INFERENCE
1) Transmitter Selection1) Transmitter Selection
Define study requirementsDefine study requirements• Radio vs. acousticRadio vs. acoustic• Battery lifeBattery life• SensorsSensors• Will the smallest available tag work?Will the smallest available tag work?
Predict transmitter impact to fishPredict transmitter impact to fish• Tag burden (typically 1 to 5%)Tag burden (typically 1 to 5%)• Dimensions and volumeDimensions and volume• Consult literature for same species & sizeConsult literature for same species & size
• What’s been published? What is defensible?What’s been published? What is defensible?
Relative to the assumption, ask yourself:Relative to the assumption, ask yourself:• Can I defend my choice of transmitter?Can I defend my choice of transmitter?• Have I considered the impact to the fish?Have I considered the impact to the fish?• Will a smaller tag meet my needs?Will a smaller tag meet my needs?• Have others used similar methods for Have others used similar methods for
this fish?this fish?
2) Fish Handling & Holding2) Fish Handling & Holding
Best practices defined—just apply them!Best practices defined—just apply them! Often seen as trivial, Often seen as trivial, butbut…………
• Stressors can be cumulativeStressors can be cumulative• Can have large impacts on tagging outcomeCan have large impacts on tagging outcome
Critical to best outcome & defense of Critical to best outcome & defense of assumptionassumption
2) Handling & Holding2) Handling & Holding Fish collection methodFish collection method Holding (before and/or after tagging)Holding (before and/or after tagging)
• Density and species interactionsDensity and species interactions
Transport considerationsTransport considerations• Density and temperatureDensity and temperature
Water quality conditionsWater quality conditions Fish transfersFish transfers
• Minimize them!!!Minimize them!!!• Transfer the container, not the fishTransfer the container, not the fish• Water to water transfersWater to water transfers
2) Handling and Holding2) Handling and Holding
Tagging stationTagging station• Orients and holds fishOrients and holds fish• Enables anesthesiaEnables anesthesia• Aids aseptic techniqueAids aseptic technique• Comfortable for taggerComfortable for tagger
3) Develop & Enforce a SOP3) Develop & Enforce a SOP Standard Operating Procedure (SOP)Standard Operating Procedure (SOP)
• Describe steps in the processDescribe steps in the process• Defines acceptable levels of parametersDefines acceptable levels of parameters• Consistent application of techniqueConsistent application of technique
Where do you start?Where do you start?• Modify from existing Modify from existing • Build your ownBuild your own
Test compliance (QA-QC monitoring)Test compliance (QA-QC monitoring)