
NSF Org: |
DEB Division Of Environmental Biology |
Recipient: |
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Initial Amendment Date: | February 28, 1991 |
Latest Amendment Date: | February 28, 1991 |
Award Number: | 9021902 |
Award Instrument: | Standard Grant |
Program Manager: |
Gregory J. McCants
DEB Division Of Environmental Biology BIO Directorate for Biological Sciences |
Start Date: | February 15, 1991 |
End Date: | July 31, 1993 (Estimated) |
Total Intended Award Amount: | $170,571.00 |
Total Awarded Amount to Date: | $170,571.00 |
Funds Obligated to Date: |
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History of Investigator: |
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Recipient Sponsored Research Office: |
123 MAIN DR VENUS FL US 33960-2039 (863)465-2571 |
Sponsor Congressional District: |
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Primary Place of Performance: |
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Primary Place of
Performance Congressional District: |
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Unique Entity Identifier (UEI): |
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Parent UEI: |
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NSF Program(s): | Evolutionary Processes |
Primary Program Source: |
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Program Reference Code(s): | |
Program Element Code(s): |
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Award Agency Code: | 4900 |
Fund Agency Code: | 4900 |
Assistance Listing Number(s): | 47.074 |
ABSTRACT
This project investigates the genetic consequences of being an extreme ecological specialist in a rare and vanishing habitat. The Florida Scrub Jay is a federally Threatened bird species, restricted to a habitat that is rapidly being eliminated by man. Twenty-two years of detailed study of a marked population have shown that these jays have an unusual social system, and rarely move more than a few territories from where they were hatched. This very limited dispersal may result in rapid development of genetic changes over short distances, especially within a habitat that is highly fragmented. A variety of sophisticated genetic techniques (DNA 'fingerprinting' and sequencing) will be used to examine genetic variation at both local and regional scales. Specific goals are to: 1) confirm that reproduction takes place only by the mated pair on each territory (i.e., extra-pair or extra-territorial fertilizations are rare or absent); 2) test whether levels of inbreeding affect lifetime reproductive performance; 3) compare the effects of distance, degree of habitat isolation, and population size on genetic variation and differentiation, and 4) test whether these genetic effects match those predicted by long-term demographic data. Besides its theoretical applications, this study will further the protection of biodiversity by showing how habitat loss and fragmentation affect the genetic makeup of ecologically specialized species.
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