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Strategies for managing declining populations
Transcript of Strategies for managing declining populations
Giant Panda - ~1,200 remaining in ~32 fragmented subpopulations; how can this species be managed successfully? How can any endangered species be successfully managed?
Augment habitat by providing resources
Augment habitat by providing structures
Augment habitat by providing social/species interactions
control threats: remove invasive predators/competitors, stop poaching, protect habitat
"85% of protected wildlife lives in 2,150 nature reserves, taking up 13% of land in China"
Directly manipulate the populations
2) Artificial Breeding
3) Ex situ Conservation
ex situ cons:
Can endanger remaining small wild populations
Difficult to maintain large enough population size to prevent inbreeding depression
Captive populations may undergo selection, adapting them to captive conditions
Loss of learned behavior can occur under captive conditions
Difficult to get species to breed under captive conditions
for successful reintroduction:
YOU NEED A SELF-SUSTAINING CAPTIVE POPULATION
REQUIRE A SUITABLE AMOUNT OF ADEQUATE AND PROTECTED HABITAT
EFFECTIVE TECHNIQUES TO PREPARE ANIMALS FOR REINTRODUCTION
UNDERSTANDING OF POTENTIAL IMPACTS OF REINTRODUCED SPECIES
POST-RELEASE MONITORING AND EVALUATION
SUFFICIENT LONG-TERM FUNDING POTENTIAL
EDUCATE THE PUBLIC
Double-clutching: removing one set of eggs to induce an animal to produce a second clutch, incubating the initial clutch elsewhere
Cross-fostering: enlisting the aid of a “foster parent”, another species acts as a surrogate parent
Head-starting: reduce mortality during the short time when young are vulnerable
Hatcheries: raise fish to a certain size then release them into the wild
Artificial Breeding Techniques:
netted carpet moth
Large blue butterfly