7952 ‎(2)‎

• UCREFRP Catalog Number: 7952
• Author: Miller, R. R. and B. Chernoff.
• Title: Status of Populations of the Endangered Chihuahua Chub,
• USFW Year: 1979.
• Copyright Material: YES

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At the Eleventh Annual Symposium of the Desert Fishes Council in Death
Valley, 15-16 November 1979, a resolution was unanimously .passed asking the
U.S. Department of the Interior to list Gila nigrescens as an endangered species
and to reintroduce the Mimbres River stock when a suitable refuge becomes
available.
Meristic data on hand strongly suggest that the populations of Gila
nigrescens in the well isolated Laguna BustilloS basin are worthy of taxonomic
recognition 13ut at what level remains to be determined. The taxonomic status
of all populations treated above will be presented in a paper now in prepara-
tion.
Acknowledgments
The following sent us records and/or loaned specimens needed for the
completion of this paper: Salvador Contreras-Balderas (UA~VL,), W. L. Minckley
(ASU), and the late Loren P. Woods, Field Museum of Natural History. In 1978
and 1979, field work was financed by the U.S. Fish and Wildlife Service, and
earlier collections. of Gila nigrescens- were made possible by support from the
National Science Foundation (NSF GB--735) and the Horace H. Rackham School of
Graduate Studies of The University of Michigan, and William P. Knoch gener-
ously-donated specimens he obtained in 1953. Thanks are due Jaime Colmenero,
Marco A. Gil, and Michael L. Smith-for assistance in preparing the Spanish
abstract. Permission to collect fishes in Mexico was kindly granted by the
Direccion.General de Regiones Pesqueras (Permits 3618 and 6243).
Literature Cited
Bailey, R. M., John E. Fitch, Earl S. Herald, Ernest A. l:.achner, C. C. Lindsey,
C. Richard Robins, and W. B, Scott. 1970. A list of common and scientific
names of fishes from the United States and Canada. 3rd ed. Amer. Fish.
Soc. Spec. Publ. 6:1-150.
Baird, S. F.~ and C. Girard. 1854. Descriptions of new species of fishes
collected in Texas, New Mexico and Sonora, by Mr. John H. Clark, on the
U.S. and Mexican Boundary Survey, and in Texas by Capt. Stewart Van Vliet,
U.S.A. Proc. Acad. Nat. Sci. Phila. 7:24-29.
Deacon, J. E., G. Kobetich, J. D. Williams, and S. Contreras. 1979. Fishes
of North America endangered, threatened, or of special concern: 1979.
Fisheries 4(2) :30-44.
Girard, C. 1856. Researches upon the cyprinoid fishes inhabiting the fresh
waters of the United States of America, west of the Mississippi Valley,
from specimens in the museum of the Smithsonian Institution. Proc.
Acad. Nat. Sci. Phila. 8:165-213.
1859. Ichthyology of the Boundary. U.S. and Mex. Boundary Surv.
2;1-85.
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