Dissertation Research: An Analysis of Plethodon Hybrid      Zones: Ethology and Isolation
{'Code': '08010207', 'Directorate': {'Abbreviation': 'BIO', 'LongName': 'Direct For Biological Sciences'}, 'Division': {'Abbreviation': 'DEB', 'LongName': 'Division Of Environmental Biology'}}
{'SignBlockName': 'Joann P. Roskoski', 'PO_EMAI': None, 'PO_PHON': None}
This is a proposal to study the processes by which new                     species are formed.  the project focuses on two key processes:                  (1) the origin of incompatibility in mating behavior, and (2) the               origin of hybrid inviability and hybrid sexual incompetence.                    Woodland salamanders (genus Plethodon) are being used for the                   proposed work because, of all land-based animals with backbones,                their hybrid zones are the best known.  Furthermore, initial work               (over 4000 pair mating trials) has shown that the proposed                      behavioral studies are feasible.                                                     The overall plan is to conduct studies of mating                           compatibility and hybrid viability in (1) a series of mountain-                 top isolates of one species (P. jordani) and (2) a series of                    contact zones between two species (P. jordani and P. teyahalee).                In some of these zones, the two speices do not hybridize                        (overlap zones), while in others they form relatively narrow                    hybrid zones or extensive hybrid swarms.                                             The evolutionary predictions that will be tested are: (1)                  Sexual incompatibility evolves as a by-product of differences in                sexual behavior that evolve in spatially separated populations.                 (2) Sexual incompatibility is strengthened if two spatially                     separated populations come back into contact with each other.                   (3) Sexual incompatibility is more pronounced in overlap zones                  than in hybrid zones, and is greater in relatively narrow zones                 than in extensive hybrid swarms.  (4) Hybrid inviability evolves                as a by-product of evolutionary change in spatially separated                   populations.
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{'Name': 'University of Chicago', 'CityName': 'CHICAGO', 'ZipCode': '606375418', 'PhoneNumber': '7737028669', 'StreetAddress': '5801 S ELLIS AVE', 'StreetAddress2': None, 'CountryName': 'United States', 'StateName': 'Illinois', 'StateCode': 'IL', 'CONGRESSDISTRICT': '01', 'CONGRESS_DISTRICT_ORG': 'IL01', 'ORG_UEI_NUM': 'ZUE9HKT2CLC9', 'ORG_LGL_BUS_NAME': 'UNIVERSITY OF CHICAGO', 'ORG_PRNT_UEI_NUM': 'ZUE9HKT2CLC9'}
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{'Code': '1127', 'Text': 'Evolutionary Processes'}
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