The black footed ferret
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The Black-Footed Ferret. Amanda Heyn, Laura Icenhour, & Evan Fitch. 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/

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The Black-Footed Ferret

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The black footed ferret

The Black-Footed Ferret

Amanda Heyn, Laura Icenhour, & Evan Fitch


Background

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/black-footed-ferret.jpg


Background cont d

Background Cont’d

  • 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/Prairie-Dogs.jpg


Survival factors

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


Geographical location

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


Bottleneck effect

Bottleneck effect refers to the reduction of a population’s 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.

Bottleneck Effect


If canine distemper had been allowed to continue in the population in wyoming

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?


Vensim model

Vensim Model


Genotypes

Genotypes

1

0.5

0

0

2

4

6

8

10

Time (Month)

Homozygous Dominant : Current

Heterozygous : Current

Homozygous Recessive : Current

Total Pop : Current


Vensim key

Vensim Key

  • Homozygous Dominant=Blue

    • As time increases dominant allele decreases

  • Homozygous Recessive=Green

    • As time increases dangerous recessive allele levels off

  • Heterozygous=Red

    • As time increases heterozygous allele remains unaffected


Hardy weinberg equilibrium

Hardy-Weinberg Equilibrium

p² + 2pq + q² = 1

p + q =1

p2 =.33 Total Population=180

p=.57 HD=42

q=.43 HR=59

q2 =.18 H=79

2pq=.49


Hardy weinberg graph

Hardy-Weinberg Graph

  • X axis=P

  • Y axis=Q

  • As P increases Q decreases

  • P=.57

  • Q=.43


Pictures

Pictures

http://www.pc.gc.ca/nature/eep-sar/itm3-/images/MikeLockhart2-.jpg

http://www.nsf.gov/od/lpa/news/03/images/black_footed_ferrets.jpg

http://www.smh.com.au/ffximage/2007/08/10/black_footedferret1_wideweb__470x314,0.jpg

http://ww1.prweb.com/prfiles/2007/05/14/526310/BlackFootedFerrets04Web.jpg


Resources

Resources

  • Averting Extinction, Tim W. Clark

  • Prairie Night; Brian Miller, Richard P. Reading, and Steve Forrest

  • http://www.defenders.org/wildlife_and_habitat/wildlife/black-footed_ferret.php

  • www.animalhealthgeneral.com


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