19. Identifying Endangered Species

19. Identifying Endangered Species - Identifying Endangered...

Info iconThis preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon
Identifying Endangered Species When does a rare or declining species warrant the special management attention reserved for endangered species?
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Assessing Endangerment to A Species Nature and magnitude of environmental threats (i.e., the “evil sextet”) Intrinsic vulnerability: species biology and life history Changes in population size and growth rate Changes in distribution and loss of populations Predictions of extinction risk (PVAs) Rules of thumb
Background image of page 2
Texas Blind Salamander One cave in Texas Monterey Pine A few locations on the California coast and islands off of Baja Vulnerability to Extinction Species with a Narrow Geographic Range
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Vulnerability to Extinction Species where population size is small – Effects of “stochasticity factors” and inbreeding depression can become important Florida Panther
Background image of page 4
Vulnerability to Extinction Species with specialized habitat requirements
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Vulnerability to Extinction Species that need large home ranges E.g., Large carnivores such as tigers 3 (4?) of 9 tiger subspecies are extinct 400 individuals of Amur (Siberian) Tiger 400 individuals of Sumatran Tiger
Background image of page 6
Species with little genetic diversity Genetic variation allows species to adapt to changing environments (new disease, predator, climate change) Vulnerability to Extinction
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 8
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 12/17/2011 for the course ZOO 360 taught by Professor Staff during the Fall '08 term at University of Wisconsin.

Page1 / 24

19. Identifying Endangered Species - Identifying Endangered...

This preview shows document pages 1 - 8. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online