Amanda%20Heyn,%20Laura%20Icenhour,%20

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Amanda%20Heyn,%20Laura%20Icenhour,%20

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Canine distemper is fatal for ferrets 100% of the time. ... If canine distemper had been allowed to continue in the population in Wyoming... – PowerPoint PPT presentation

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Title: Amanda%20Heyn,%20Laura%20Icenhour,%20

1
The Black-Footed Ferret

Amanda Heyn, Laura Icenhour, Evan Fitch

2
Background

Black-Footed Ferrets are members of the weasel
family (Mustelidae)
Ferrets are nocturnal and do most hunting at
night

http//animals.nationalgeographic.com/staticfiles/
NGS/Shared/ StaticFiles/animals/images/primary/bla
ck-footed-ferret.jpg
3
Background Contd

The Black-Footed Ferret prey on prairie dogs and
lives in their burrows
Ferrets were thought
to be extinct
A population of ferrets was found in 1981

http//www.nps.gov/wica/naturescience/images/Prair
ie-Dogs.jpg
4
Survival Factors

Cancer carried on recessive allele
Susceptibility to Canine distemper
A contagious, incurable, often fatal,
multisystemic viral disease affecting the
respiratory, gastrointestinal, and central
nervous systems in mammals.
Canine distemper is fatal for ferrets 100 of the
time.
First introduced to ferret population in 1981

5
Geographical Location

Ferrets were once found throughout the Great
Plains, from Texas to southern Saskatchewan,
Canada.
Since 1985, efforts have been made to breed the
ferrets in captivity and then reintroduce them
into the wild.

http//www.ngpc.state.ne.us/wildlife/ferret.asp
6
Bottleneck Effect

Bottleneck effect refers to the reduction of a
populations gene pool and the accompanying
changes in gene frequency produced when a few
members survive the widespread elimination of a
species.
The black footed ferrets underwent a bottleneck
effect resulting in the last wild population site
of ferrets to be discovered in Meeteetse, Wyoming
1981.
About 25 of the original 19 founders genes have
made it into the current population.

7
If canine distemper had been allowed to continue
in the population in Wyoming

Would the prevalent genotypes reverse?
Would the dangerous recessive allele lead to an
increased number of ferret death?

8
Vensim Model
9
Genotypes
10
Vensim Key

Homozygous DominantBlue
As time increases dominant allele decreases
Homozygous RecessiveGreen
As time increases dangerous recessive allele
levels off
HeterozygousRed
As time increases heterozygous allele remains
unaffected

11
Hardy-Weinberg Equilibrium

p² 2pq q² 1
p q 1
p2 .33 Total Population180
p.57 HD42
q.43 HR59
q2 .18 H79
2pq.49

12
Hardy-Weinberg Graph

X axisP
Y axisQ
As P increases Q decreases
P.57
Q.43

13
(No Transcript)
14
Pictures
http//www.pc.gc.ca/nature/eep-sar/itm3-/images/Mi
keLockhart2-.jpg
http//www.nsf.gov/od/lpa/news/03/images/black_foo
ted_ferrets.jpg
http//www.smh.com.au/ffximage/2007/08/10/black_fo
otedferret1_wideweb__470x314,0.jpg
http//ww1.prweb.com/prfiles/2007/05/14/526310/Bla
ckFootedFerrets04Web.jpg
15
Resources