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<br /> <br /> <br /> <br /> <br />1 <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br />All adult fish captured were weighed and measured, and scanned for the presence of a <br />passive integrated transponder (PIT) tag or examined for presence of a carlin dangler tag. <br />Beginning in 1990, fish captured that were tagged with carlin tags were re-tagged with PIT tags <br />and the former tag type was removed (pers. comm. C. McAda). Data were reported to the <br />centralized database manager for archiving. <br />Fish sampling, larvae.-Light traps were used as the primary sampling gear during <br />Baisnwide monitoring because sampling during 1992 to 1995 (Muth 1995) demonstrated that <br />light traps were a more effective means of sampling early life stages of razorback suckers from <br />low-velocity areas than other gears. During 1996 to 1999, light-trap sampling for early life <br />stages of razorback suckers occurred in the same reaches as adult sampling, but effort was <br />distributed differently. Light-trap sampling localities for the middle and lower Green River <br />reaches are listed in Appendix I and II, respectively. Only a few samples were collected in the <br />lower Yampa River in 1996 and 1998, but none were collected in 1997 or 1999. Sampling in the <br />middle Green River occurred in all three main reaches but was concentrated near the Escalante <br />Ranch spawning area (e.g., Cliff Creek) in most years, and secondarily near downstream Old <br />Charlie Wash and Ouray National Wildlife Refuge (e.g., Greasewood Corral). In general, <br />sampling became more focused on areas where suitable low-velocity habitat was available each <br />year and throughout the season regardless of flow level. In the lower Green River, sampling for <br />larvae was concentrated in Labyrinth Canyon near Millard Canyon, Anderson Bottom, Holeman <br />Canyon, and Stillwater Canyon, and near the mouth of the San Rafael River. Light-trap sampling <br />was also conducted in the Green River Valley. These were many of the same places that were <br />sampled in previous work from 1993 to 1995 (Muth 1995). Flooded tributary mouths and <br />washes, large backwaters, and other low-velocity channel-margin areas were primary sampling <br /> <br />