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15 Cards in this Set
- Front
- Back
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reintroduction program
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involves releasing captive-bred or wild-collected individuals into an ecolocially suitable within their historical range where the species no longer occurs
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restocking program
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involves releasing individuals into an existing populations to increase its size and population
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introduction program
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involves moving captive-bred and wild-collected animals or pants to areas suitable for species outside their historical range
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head starting
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an approach in which animals are raised in captivity during their vulnerable young stages and then released into the wild ex: sea turtles
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generalization about successful establishment programs
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greater for releases in excellent quality habitat
greater in the core of the historical range greater with wild-caught then captive-reared animals greater for herbivores than carnivores |
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research on establishing new populations has three urgent needs:
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the costs need to be traced to see if it is cost effective
more work needed on tropical and marine species develop ways to teach learned behaviors |
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captive-bred mammals and birds must learn___ to be able to survive and reproduce
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learn predator avoidance and species appropriate social behavior
ex: condors |
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Plant reintroductions:
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seeds usually fail
plants are grown from seeds or cuttings and then translated into their new home site as seedlings or mature plants |
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milk weed (Asclepias meadii)
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prairie plant in the midwestern US characterized by low seed production, needed burning to help in management
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knowltons cactus (Pediocactus knowltonii)
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found only on one hill side in northwestern NM, new nearby sites started with some success
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mitigation
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proposal made by developers to create new habitat or new populations of endangered species Parts: reduction in the extent of damage (2)establishment of new populations and habitat as compensation (3)enhancement of what remains after development
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reintroduction of plants species require a different approach
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because of their specialized environmental requirement and their inability to move. current research focuses on improving site selection, habitat management and planting techniques
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Widely dispersed populations in the wild may be less likely be
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destroyed by catastrophes (earthquake, disease, hurricanes, epidemics, wars)
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increasing the number and size of populations for a species will generally reduce its probability of
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extinction
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The reintroduction of keystone predator can have major impacts
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lower trophic levels and can transform the structure of the entire ecosystem
ex wolf pack in yellowstone |
