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<br />APPENDIX I:
<br />
<br />Brief summaries of results for sets of collections processed in FY 97 for Recovery Program
<br />investigations (abstracted from LFL data reports submitted to source or responsible agencies).
<br />
<br />(1) ISMP Collections.
<br />
<br />(a) Fall Seine Collections, Colorado and Lower Green Rivers, September 19-28, 1995
<br />(cataloging and report completed from FY 96).
<br />
<br />This set consists of preserved fishes from 157 collections taken during the 1995 fall
<br />monitoring program-31 from the Colorado River in Colorado (river miles 184.1-
<br />140.1), 83 from the Colorado River in Utah (river miles 108.8-0.0 above the
<br />confluence with the Green River), and 43 from the lower Green River in Utah (river
<br />miles 116.0-4.0). The specimens have been cataloged (LFL 2&205-2&934) and are
<br />stored as part of the Larval Fish Laboratory Collection for voucher and future study
<br />(e.g., identification of humpback chub).
<br />
<br />In all, the collections received contain 48,559 preserved fish (an average ofJ09
<br />specimens per collection) representing 17 species. Nearly 98% are non-native. Of all
<br />fish, 98% are cyprinids (95% of all fish in the Colorado reach of the Colorado River,
<br />98% in the Utah reach of the Colorado River, and nearly 100% in the Green River).
<br />By species, red shiner, fathead minnow, sand shiner, westem mosquitofish, bluehead
<br />sucker, and speckled dace respectively account for 51 %, 27%, 17%, 1%, 1 %, and 1 %
<br />of the fish-57%, 11%,22%, 1 %, 3%, and 4% in the Colorado reach of the Colorado
<br />River; 43%, 37%,15%,1%,1%, and >0% (28 specimens) in the Utah reach; and
<br />67%,12%, 19%, >0% (I specimen), >0% (17 specimens), and >0% (31 specimens) in
<br />the Green River. For this year, preserved collections included 311argemouth bass;
<br />only one was preserved in 1994 collections. A single 101-rom Utah chub was taken
<br />at the confluence of the Colorado and Green Rivers.
<br />
<br />Preserved collections included many more native chub and Colorado squawfish than
<br />in 1994. All but 2 of 132 chub in 1995 collections were taken from the Colorado
<br />River, mostly the Colorado reach (80 specimens). They range in size from 12 to 54
<br />mm TL (total length) and all but 20 have 9 dorsal and 9 anal fin rays suggesting that
<br />most are roundtail chub. Most others have 10 anal fm rays and one also had 10 dorsal
<br />fin rays suggesting the possibility of humpback chub and even bonytail. No Colorado
<br />squawfish were taken in the Colorado reach of the Colorado River, 64 were taken in
<br />the Utah reach, and 8 in the Green River. The preserved Colorado squawfish range in
<br />size from 11 to 28 mm TL.
<br />
<br />(b) Spring Seine Collections, Colorado River, Utah, 17 March Through 3 April 1996
<br />(counts, measures, cataloging, and report completed from FY 96). .
<br />
<br />This set consists of preserved fish from 55 collections taken during the 1996 spring
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