caa a22 4500 397550243 CHVBK 20180308164748.0 cr unu---uuuuu 161202e199604 xx s 000 0 eng 10.1006/jmsc.1996.0068 doi (NATIONALLICENCE)oxford-10.1006/jmsc.1996.0068 Comparison of hydroacoustic and net catch estimates of Pacific salmon smolt (Oncorhynchus spp.) passage at hydropower dams in the Columbia River Basin, USA [Elektronische Daten] [Bruce H. Ransom, Tracey W. Steig, Patrick A. Nealson] In the last 16 years, fisheries agencies and power producers in the Columbia River Basin have increasingly relied on hydroacoustic assessments of downstream migrating, anadromous Pacific salmon smolts (Oncorhynchus spp.) when evaluating bypass system designs at hydroelectric dams. Accompanying this reliance has been an interest in comparing hydroacoustic estimates of smolt passage with net catch estimates. Since the objectives could be addressed effectively with relative estimates of fish passage, single-beam hydroacoustic techniques were used. The correlation between hydro-acoustic and net catch estimates of smolt passage into the sluiceway at Ice Harbor Dam was statistically significant (r=0.96, n=26, p<0.001). Rocky Reach Dam hydroacoustic and fyke net catch vertical distributions were very similar. At Lower Granite Dam, the correlation between net catch estimates and hydroacoustic estimates of smolt passage was statistically significant (r=0.96, n=21, p<0.001). At Wanapum Dam, in 1994, there was a significant correlation between net catch and hydroacoustic estimates of smolt passage (r=0.96, n=10, p<0.001), and there was no statistically significant difference between the paired estimates. From 1991 to 1994, there was a significant correlation between mean hydroacoustic and net catch estimates of in-turbine diversion screen fish guidance efficiency (r=0.36, n=37, p=0.031), with no significant difference between the paired estimates. © 1996 International Council for the Exploration of the Sea Regular Articles nationallicence comparison nationallicence dam nationallicence entrainment nationallicence hydroacoustic nationallicence Oncorhynchus nationallicence screen nationallicence Ransom Bruce H. Hydroacoustic Technology, Inc., 715 NE Northlake Way, Seattle, Washington 98105, U.S.A. aut Steig Tracey W. Hydroacoustic Technology, Inc., 715 NE Northlake Way, Seattle, Washington 98105, U.S.A. aut Nealson Patrick A. Hydroacoustic Technology, Inc., 715 NE Northlake Way, Seattle, Washington 98105, U.S.A. aut ICES Journal of Marine Science Oxford University Press 53/2(1996-04), 477-481 1054-3139 53:2<477 1996 53 icesjms https://doi.org/10.1006/jmsc.1996.0068 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1006/jmsc.1996.0068 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ransom Bruce H. Hydroacoustic Technology, Inc., 715 NE Northlake Way, Seattle, Washington 98105, U.S.A aut NATIONALLICENCE 700 1- Steig Tracey W. Hydroacoustic Technology, Inc., 715 NE Northlake Way, Seattle, Washington 98105, U.S.A aut NATIONALLICENCE 700 1- Nealson Patrick A. Hydroacoustic Technology, Inc., 715 NE Northlake Way, Seattle, Washington 98105, U.S.A aut NATIONALLICENCE 773 0- ICES Journal of Marine Science Oxford University Press 53/2(1996-04), 477-481 1054-3139 53:2<477 1996 53 icesjms Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford