Transcript notes: comparison of counting systems

Welcome back!
Read the board and
review for quiz on
laws!
Endangered Species Laws

Lacey Act

Endangered Species Act

Convention on
International Trade in
Endangered Species

Be ready to
compare/contrast

I will answer only two
questions from the
class.
OK! Please put
your natural
selection reading
outline on your
desk for a stamp
during the quiz!
Healthy?
Threatened?
Endangered?
Counting has legal consequences!
Please get out your wildlife management notes.
Random Sampling activity –
(the beans)

Share your * answers!

#3 – Asymptotic point = more PRECISION
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#7 – How could we have improved accuracy?
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Does any of this apply to our lab work comparing the
managed and unmanaged prairie areas?
Why count population size
accurately?
Census vs. Random

sampling.
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Standardized procedure
reduces bias
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Improving accuracy:

More samples
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Strict standards for
asymptotic point
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Tailor data collection to
organism’s life history
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ROBUST DATA!
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Accuracy is important –
legal protection can limit
individual land
use/decisions
Quadrant Sampling in Wolf
Prairie – design flaws?
Transect sampling
Tag and Recapture is a TYPE
of random sampling

-population size

-identify critical habitat
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-identify migratory pathways
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-monitor population health
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Bird Banding
Contact info, ID number
Westside at Guadalupe State Park
– Spring 2014 Bird Banding
Permanent tracking devices
PIT tagging
Tag and Recapture

OK to recapture same individual.
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Formula accounts for this.
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Why is it important for wildlife managers to determine
population size accurately?
Assessing population size

Census

Counts each individual
organism

Large organisms
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Stationary
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Areal photos
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Random Sampling
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Vegetation
Animals

Quadrant
Tag and R

Transect
ratio

H’