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Communication at the NABS Annual meeting, Keystone, 2000
(380) PRELIMINARY LIFE HISTORY ESTIMATES
FOR CAENIS LATIPENNIS (EPHEMEROPTERA) IN A TRAVERTINE
STREAM OF THE ARBUCKLE MOUNTAINS.
J.M. Taylor and J.H. Kennedy. Department of Biology, University of North Texas, Denton, Texas, U.S.A. 76203-0559
Caenis latipennis represents a widespread Caenid species occurring through out North America, excluding the Rocky Mountain area and extreme southeastern region of the United States. Sampling indicates that C. latipennis is the dominant mayfly in Honey Creek and prefers gravel substrate. Beginning in the summer of 1999, gravel beds were sampled using a modified Hess sampler. Weekly samples taken during the autumn months indicate an asynchronous life cycle with no distinct cohorts. Using UV light traps, adult emergence has been observed every week with densities dropping off in November and December. Eggs taken from field collected adults are being reared in the laboratory, to determine cohort lengths at different temperatures. Eggs require 10 days to hatch at a twelve-hour fluctuating temperature cycle between 20 - 21°C. At this temperature regime, developing larvae take approximately 5 months to complete development from eggs to adult. This is comparable to development time of 127 days for C. hilaris from Florida (no temperature data available). Information from continuing collection trips throughout the remaining year will be used to determine the complete life history and secondary production of C. latipennis.
Presented at 1:00 PM on Wednesday, May 31, 2000 in Life History Characteristics
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