is assumed. Decreasing the precision of the abundance estimates dilutes our ability to detect cause and effect
relationships. As a result, our ability to refine stocking rates, detect environmental and biological influences on
survival, and correlate abundance of "large" saugeye with improvements in crappie population structure would be
compromised. CPUE is also one criteria used to prioritize annual saugeye stocking requests (Gilliland and Boxrucker
1995). The lack of precision of historical and future estimates makes objective among lake comparisons of CPUE for
prioritization purposes difficult.
1. Fall night electrofishing samples should be used to evaluate abundance of age-0 and yearling saugeye
populations. However, effort needs to be increased substantially (10 hours/lake) to provide estimates of
sufficient reliability on which to base management decisions. The amount of electrofishing effort currently
being spent is sufficient to detect a 50% change in abundance.
2. Data on "large" saugeye should be collected during the fall night electrofishing sampling. Since habitat
type had little influence on sampling efficiency, data on "large" saugeye should also be collected during routine
largemouth bass sampling efforts (spring, day time). Continued critical analysis of these data are needed.
Hopefully as the precision of the data is improved, sampling protocol for "large" saugeye will be refined.
3. The stocking criteria currently being used (Gilliland and Boxrucker 1995) needs continued updating as
refinements in sampling procedures are made.
III. Prepared by:
IV. Date: April 1, 1997
V. Approved by:
Dr. Harold Namminga
Federal Aid Research Coordinator
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