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More specifically, listed below are the fish seined from this sec- lion of the river. Seining vas done only during the summer and fall sampling periods. Species and Numbers of Fish Seined from the San Jnan River Between itiver Miles. 16.2 and 5.0 in 1987. Number Collected S ecies by Samp ling Period sus fall Total Carp 155 1 156 Unidentified Sucker 600 600 Bluehead Sucker 4 4 Channel Catfish 4 4 Largemouth Bass 2 2 Fathead Hinnow 236 2193 2494 Red Shiner 549 1494 2043 Rio Grande Killifish 1 6 7 Speckled Dace 2 12 14 Mosquitofish 3 147 150 Colorado Squavfish 9 9 Totals 1548 3870 5483 In comparing the summer and fall seining efforts, there are some obvious differences in species composition and total numbers. During the summer period, young-of-the-year carp and unidentified suckers were still small and could be found in backwaters, whereas by the fall period they had gone to deeper water and were rarely seined. Also, fathead minnows and mosquitofish were seined in higher proportions in the fall since there were more isolated backwaters with warm water temperatures avaible to them.' Most of the red shiners sampled were found in areas more closely associated with the main river channel. Of note, only four young-of-the-year catfish were seined, a nuaber much lower than expected, given the high abundance of adult catfish collected. The most important collection vas that of the nine young-of-the-year Colorado squavfish. These fish were collected from four different backwaters, two of 11