7017

• UCREFRP Catalog Number: 7017
• Author: Starnes, W. C.
• Title: Colorado River Basin
• USFW Year: 1989.
• Copyright Material: NO

1982. Kaeding, L.R., and M.A. Zimmerman. Life history and
population ecology of the humpback chub in the Little
Colorado and Colorado rivers of the Grand Canyon, Arizona;
pp. 281-320, in: W.H. Miller et al., Pt. 2. U.S. Fish &
Wildlf. Serv.-Bur. Reclam., Salt Lake City. 365 p.
A treatment primarily of life history and ecology attributes
of G. cypha but gives a summary of meristic variation from
large samples taken in the Little Colorado and adjacent area
noting differences between chubs taken near the mouth of the
LCR and those from a few km upstream. Suggests that the
high incidence of high meristic counts in specimens from the
lower reaches reflects a residual genetic influence of G.
elegans which purportedly once occurred in the region. Some
reproductive isolation between downstream and upstream
populations was suggested as was the need for further study
through electrophoretic or other techniques.
1982. Tyus, H.M., C.W. McAda, B.D. Burdick. Green. River fishery
investigations: 1979-1981; pp. 1-99 in: W.H. Miller et al.,
eds. Colorado River Fishery Project. Pt. 2. U.S. Fish &
Wldlf. Serv.-Bur. Reclam., Salt L. City, UT. 365 p.
In the course of an extensive field study designed to determine
habitat preferences and movements of Gila species in a
section of the Green River numerous specimens were collected
and subjected to analyses suggested by Smith et al. (1979)
as being possibly definitive for three species.
Difficulities in application of these criteria were
encountered because of the use of live specimens, lack of
differentiation in juvenile specimens, variation in
technique between workers, and possible differences in form
of live versus preserved material and it was suggested that
refinement of the technique was needed. A centimeter grid
board technique was used to capture shape dimensions of live
fishes, a method which, in conjunction with photographs, has
since been used extensively in upper Colorado River basin
studies. In a.preserved sample, over half could not be
classified as belonging to a particular taxon and the plight
of attempted field identifiers of such material was pointed
out. Meristic data (gill rakers, vertebral counts) is
presented for samples containing three species. Fin tissue
was reportedly sent to Arizona State University (now at
UCLA??) for eletrophoretic analysis.
1982. Valdez, R.A., and G.H. Clemmer. Life history and
prospects for recovery of the humpback and bonytail chub;
pp. 109-119, in: W.H. Miller et al., Fishes of the upper
Colorado River system, present and future. Western Div.
Amer. Fish. Soc., Bethesda, Md. 131 p.
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