Reproduction by the endangered cui-ui in the lower Truckee River

Transactions of the American Fisheries Society
By: , and 



Adult spawning behavior and emigration of larvae of the endangered cui-ui Chasmistes cujus were studied in a natural side channel of the lower Truckee River. External radio-tags placed on eight apparently did not affect spawning behavior. Cui-uis spawned in clusters of two to seven fish; usually a single female was flanked by two males. Each spawning act lasted 3–6 seconds, and individual fish spawned numerous times. The most active tagged male and female spawned at least 294 times and 114 times, respectively. Individual females broadcast eggs over an area of up to 50 m2. Males spawned over a 4–5-day period, and females over 2.5–4 days. Most spawning occurred at night in water depths ranging from 9 to 43 cm, water velocities ranging from 23 to 87 cm/second, and temperatures of 12–17 C. The preferred spawning substrate was gravel. Peak emergence and out-migration of cui-ui larvae occurred 14 days after peak spawning.

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Publication type Article
Publication Subtype Journal Article
Title Reproduction by the endangered cui-ui in the lower Truckee River
Series title Transactions of the American Fisheries Society
DOI 10.1577/1548-8659(1983)112<788:RBTECI>2.0.CO;2
Volume 112
Issue 6
Year Published 1983
Language English
Publisher American Fisheries Society
Contributing office(s) National Wetlands Research Center
Description 6 p.
First page 788
Last page 793
Country United States
State California, Nevada
Other Geospatial Truckee River
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