Table 4.

Detection efficiency was consistently higher at the west-bank fishway compared to the east-bank fishway. The increase in detection efficiency at the east-bank fishway likely reflects an increase in the proportion of returning adults implanted with a better performing PIT tag.

Year Eastbank Fishway Westbank Fishway
2003 0.925 0.995
2004 0.943 0.991
2005 0.960 0.990