Jump to main content or area navigation.

Contact Us

Extramural Research

Grantee Research Project Results

Grantee Research Project Results

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: Jones, Brandon
Project Period: September 1, 1998 through September 1, 2001
Project Amount: $71,038
RFA: STAR Graduate Fellowships (1998)
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, extirpation-through-introgression

Top of Page

The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoints of the principal investigator and may not represent the views and policies of ORD and EPA. Conclusions drawn by the principal investigators have not been reviewed by the Agency.

Jump to main content.