7950

• UCREFRP Catalog Number: 7950
• Author: Williams, J. E. and G. R. Wilde
• Title: Taxonomic Status And Morphology Of Isolated Populations Of The White River Springfish,
• USFW Year: 1981
• Copyright Material: YES

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SNOUT LENGTHISTANDARD LENGTH

Fig. 5. Comparison of snout length in populations of Crenichthys baileyi. See text for
explanation of figure.

Species Associates and Status.-No fish species other than springfish normally exist in the springs
inhabited by C. b. thermophilus. Location on a tributary of the White River and the high water
temperature of Monnon, Hot Creek, and Moon River Springs apparently restricted these waters to
a single native fish. Largemouth bass (Micropterus salmoides) entered Hot Creek Spring in the early
1970's from Dacey Reservoir, where they had been introduced as game fish. It was thought that the
bass had extirpated the springfish until personnel from the Nevada Department of Fish and Game
discovered a group of springfish separated from the main pool area by dense emergent vegetation.
Hot Creek Spring was poisoned and the isolated springfish were introduced into the main pool area
after a barrier to prohibit entry of bass was repaired. Despite the barrier, one bass, probably
introduced by fishermen, was observed in the main pool area in 1979. The proximity of bass to Hot
Creek Spring can be expected to result in additional intentional or accidental introductions in the
future. Viable populations currently exist in all springs inhabited by C. b. thennophilus. This
subspecies formerly was common in the warm outflow of Hot Creek Spring. It has been extirpated
there by largemouth bass.

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