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Zool 408: Methods

Field Methods

QuestionAnswer
Type of mammal caught by a pitfall trap small mammal
Types of live traps sherman trap, tomahawk live trap, longworth live trap, culvert trap, clover trap
Beaver trap bailey beaver trap (live)
2 types of bat traps bat harp and/or mist net
Trap commonly used on ungulates clover trap
2 varieties of the leghold trap to reduce injury offset (jaws offset when closed), soft catch (rubber edge)
2 types of bear traps bear leghold trap and bear foot snares
Benefits of DNA mark-recapture no handling of animal, lower cost, can include harvested bears
Downside of DNA mark-recapture don't have ages for population structure and reproductive info
Problems with hair snag methods if no food reward then bears avoid, if food reward then become trap happy
Types of materials used as lures bases (fish oil), musky (beaver castor), intense, sweet
Types of wolf dispersal samples scat and hair
Mutilation methods toe clipping, ear notching, tail docking, branding, hair clipping (short term)
Issues with natural marks (e.g. whale fins) need standard position, numerous images to cross-reference, distance to subject, possible mis-identification
Other marking methods marker darts, hair dye, collars, tetracycline markers (look at lines in teeth)
Types of radio telemtry VHF (high frequency), Satellite telemetry (Doppler shift), GPS
Information which can be collected from radio telemetry location, activity, temperature, heart rate, date of birth (if implanted in vagina)
Bradycardia slowing of heart rate (common in smaller pinnepids)
What is purpose of bradycardia conserves oxygen for heart and brain function
Relative stores of oxygen in blood elephant seals highest, then stellar sea lions, then humans
Relative stores of oxygen in muscle elephant seals highest, then stellar sea lions, then humans
Relative stores of oxygen in lungs stellar sea lions, humans, elephant seals
Focal animal sampling record all observations of specific behavior of specific animal at set intervals
Scan sampling recording activity of all or selected individuals
Created by: 589427703
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