Mechanisms Driving the Extirpation of a Desert Fish Species

EPA Grant Number: U915345
Title: Mechanisms Driving the Extirpation of a Desert Fish Species
Investigators: Rosenfield, Jonathan Alan
Institution: New Mexico Institute of Mining and Technology
EPA Project Officer: Lee, Sonja
Project Period: September 1, 1998 through September 1, 2001
Project Amount: $71,038
RFA: STAR Graduate Fellowships (1998) RFA Text |  Recipients Lists
Research Category: Fellowship - Zoology , Biology/Life Sciences , Academic Fellowships


The objective of this research project is to identify the forces contributing to extinction via hybridization among animal species in nature.


I am using the explosive introgression between the Pecos pupfish and the sheepshead minnow (genus: Cyprinodon) as a model system for studying mechanisms of hybridization and introgression. Differences in sexual selection systems, indicators of ecological competitiveness, and life history attributes of the two parent species and their hybrids are being studied as potential factors that promote hybridization and introgression in these related fish species.

Supplemental Keywords:

fellowship, extinction, hybridization, introgression, speciation, conservation biology, fish, sexual selection, natural selection, extirpation, Pecos pupfish, sheepshead minnow, Cyprinodon, ecological competitiveness., RFA, Scientific Discipline, Ecosystem Protection/Environmental Exposure & Risk, Ecology, exploratory research environmental biology, Genetics, wildlife, Ecosystem/Assessment/Indicators, Ecosystem Protection, Zoology, Ecological Effects - Environmental Exposure & Risk, Molecular Biology/Genetics, Biology, Exp. Research/future, Futures, Ecological Indicators, extinction risk, cyprinodon pecosensis, pecos pupfish, conservation, rapid evolution, speciation, introgression, hybridization, sheephead minnow, cyprinodon variegatus

Progress and Final Reports:

  • 1999
  • 2000
  • Final