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1 <br />1 <br />1 <br />PIT-tagged fish (4 in the dorsal musculature and 3 in the body cavity) (Table 1). This <br />low recovery rate may have been attributed to 1) our inability to detect and net dying <br />fish among the dense aquatic vegetation, or, more likely, 2) the delayed (greater than 48 h) <br />mortality associated with angling and handling at the time of tagging was higher than <br />I anticipated. <br />I <br />1 <br />1 <br />1 <br />1 <br />Two weeks prior to the rotenone treatment, a mark and release experiment was <br />performed. This was conducted because we were interested in how effective the <br />rotenone would be killing fish, and to determine how effective we were in recovering <br />fish. Forty-seven Colorado squawfish from West Pond were collected by angling, fin <br />clipped, and released. Only 12 (26%) of these fish were recovered either during or <br />following the treatment. This suggests that these fish may have been stressed by the <br />angling and fin clipping and that mortality was high for these released fish. The low <br />recovery rate of Colorado squawfish from the control, PIT-tagged, and fin-clipped groups <br />strongly suggests that mortality was high, and this mortality may have been associated <br />with the angling and subsequent handling. <br />Razorback sucker <br />Gardner Pond. Thirty-eight razorback sucker were collected from Humphrey <br />n <br />r <br /> <br /> <br />Pond June 1988 and transferred to Gardner Pond. However, a majority of the fish died <br />prior to establishing the control and PIT tagged groups. The control and two test groups <br />initially consisted of 6 fish each. However, 8 of these fish (2 control, 3 PIT tagged in the <br />body cavity and 3 PIT tagged in the dorsal musculature) died before being released. <br />Long-term survival of these fish in Gardner Pond appeared low. On four successive <br />16 <br />1