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- Title
Refuge Management for the Threatened Railroad Valley Springfish in Nevada.
- Authors
DEACON WILLIAMS, CYNTHIA; WILLIAMS, JACK E.
- Abstract
Railroad Valley springfish Crenichthys nevadae were introduced into the outflow of Chimney Hot Springs, Nevada, in 1978 to aid survival of this threatened species. A population of Railroad Valley springfish subsequently became established in artificial pools created in the springs' outflow. The population thrived until spring failure caused the habitat to dry up during the summer of 1981. A second introduction was made in 1982 after springflow returned, and a population of 1,881 adults was estimated in 1985. The population remained robust until 1988, when manipulation of water flow through the pools raised water temperatures above the species' maximum thermal tolerance. Increased pool temperatures forced most of the Railroad Valley springfish to disperse downstream to cooler water outside the refuge boundary. Improved maintenance of water flow allowed surviving fish to partially recover by 1989. Trespass by cattle has been a continuing problem and contributed to losses observed in 1988. Frequent monitoring and management of water supplies and refuge lands are necessary for maintenance of introduced populations of threatened and endangered fishes. Even then, long-term survival cannot be assured because of stochastic environmental variation.
- Publication
North American Journal of Fisheries Management, 1989, Vol 9, Issue 4, p465
- ISSN
0275-5947
- Publication type
Article
- DOI
10.1577/1548-8675(1989)009<0465:RMFTTR>2.3.CO;2