7031

• UCREFRP Catalog Number: 7031
• Author: Deacon, J. E.
• Title: Endangered and Threatened Fishes of the West
• USFW Year: 1979
• USFW - Doc Type: Great Basin Naturalist Memoirs
• Copyright Material: YES

1979

THE ENDANGERED SPECIES: A SYMPOSIUM

submerged aquatic vegetation from the pond
to make a better swimming pool (Deacon et
al. 1964). The killifish population crashed
during the winter of 1962-63 to almost cer-
tainly fewer than 50 individuals (Fig. 12).
The population had recovered somewhat by
winter 1963 but appeared to be less abundant
through early 1965 than was the case prior to
introduction of goldfish.
In July 1967, Professors Carl L. Hubbs and
R. R. Miller and I, in cooperation with our

families and several students from UNL V and
ASU, attempted to remove all goldfish from
Manse Spring by trapping, seining, using
anesthetic, and, finally, dynamiting. All kill-
ifish captured were held in cages in a nearby
small spring and all goldfish were destroyed:
A total of 1239 killifish were captured and
returned. At least two adult goldfish eluded
us and spawned by the end of the summer.
The killifish population crashed as it had in
1963, reaching a low point of probably fewer

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