Laserfiche WebLink
<br />I <br />I <br />t <br />'i <br />I <br />i <br />I <br />I <br />I <br />I <br />I <br />i <br />I <br />I <br />I <br />I <br />I <br />i <br />I <br /> <br />large- and small-bodied fish and varied depending on river access, discharge, <br />habitat, and human safety. Small fish including larvae were collected with seines <br />and dip nets and large fish were collected with seines, trammel nets, hoop nets, <br />angling, and boat- and bank-electrofishing (Table 1). Trammel nets were set in <br />eddies along the eddy-run interface and cleared of fish every 30 minutes. Angling <br />employed baited hooks lworms or crickets), dry-flies, and spoon-type lures. Seines <br />and dipnets were used to sample near-shore areas and backwaters. Angling, hoop <br />net, and trammel net sampling occurred almost exclusively in the lower reach in an <br />attempt to capture rare, endangered fishes for tagging (Table 2). Trammel and <br />hoop nets were not used in the middle reach because of a lack of sites of suitable <br />depth. Boat electrofishing was minimal in the middle and upper reaches because <br />shallow riffles restricted movement. <br /> <br />Fish were grouped as either small-bodied or large-bodied species based on <br />the approximate length at which they become adults. Large-bodied species were <br />those that reach the adult stage at lengths 2..200 mm; small-bodied species were <br />those that reach the adult stage at lengths < 200 mm. Percent composition at <br />each site and in each season was calculated separately for small- and large-bodied <br />fish. For each species, individuals were also partitioned as larvae, juveniles, or <br />adults based on size and morphological development ITable 3). <br /> <br />As part of fish community assessments during baseflow, we intensively <br />sampled two, low-flow, refugia pools with bank electrofishing duplicating <br />techniques and the same site sampled in 1994 (Hawkins et al. 1997). Baseflow <br />sampling included a pool at the upper site IRK 102.2) sampled on September 28 at <br />a discharge of 3.2 m3/sec and another pool at the lower site IRK 5.6) sampled on <br />October 1 at a discharge of 4.8 m3/sec. The upstream site was 130-m long, 23-m <br />wide, with an average depth of 0.8 m and the downstream site was 100-m long <br /> <br />5 <br />