Thunderbird Reservoir was impounded in 1965 as the municipal water supply for several central-Oklahoma
communities. It covers 2,448 ha and has a shoreline development ratio of 7.9, mean depth of 6 m, maximum depth
of 21 m, and a water exchange rate of 0.57. The lake is moderately turbid (mid-summer secchi disk readings average
approximately 60 cm). Thunderbird was first stocked with saugeye in 1985 and has since received annual stockings.
Holdenville Lake covers 223 ha and was constructed in 1932 by the City of Holdenville as a water supply.
The lake has a mean depth of 6 m and a maximum depth of 16 m, a shoreline development ratio of 3.3, a water
exchange rate of 0.36, and a secchi disk reading of 180 cm. Saugeye have been stocked annually since 1988, with the
exception of 1992.
Jean Neustadt was impounded in 1968 and covers 187 ha. It has a mean depth of 3 m and a maximum depth
of 14 m, a shoreline development ratio of 3.3, a water exchange rate of 0.76, and a secchi disk reading 76 cm. With
the exception of 1992, saugeye have been stocked annually since 1989.
Electrofishing samples were collected on two dates on each lake during March, April, May, October, and
November, 1996. Samples were collected at fixed sites, with two-person crews (one dipper/one boat driver) using
pulsed DC current (60 pulses/sec; 8-10 amps). Electrofishing sites were stratified by habitat; 1) points and main-lake
shoreline, hereafter referred to as "saugeye" habitat; and 2) coves, hereafter referred to as "bass" habitat. Six 15-
minute units of effort were collected in each habitat type during daylight on each date. Six units of effort also were
collected after dark in "saugeye" habitat on each date for a total of 18 units of effort. The day and night samples in
"saugeye" habitat were collected at the same sites. Data from both sampling dates for each month were pooled (36 units
of effort per lake per month).
Saugeye were the only fish collected during sampling. All fish were measured to the nearest mm and weighed
to the nearest g and with one of four size categories used for analysis; 1) <_ 310 mm (age 0; hereafter referred to as
"small"); 2) <. 400 mm (age 0 and yearling; hereafter referred to as "intermediate"); 3) _> 457 mm (statewide
minimum length limit; hereafter referred to as "large"); and 4) all size classes combined. Spring, 1996 and fall, 1996
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