ISBN:  Unavailable

Category: Unavailable

Page count: 58

This report describes a study using underwater digital video technology to monitor adult chinook, sockeye, & coho salmon and steelhead in the Kwinageese River, a major tributary of the Nass River, north-west British Columbia. The study technique does not trap or handle any fish or alter fish movement. Fish were directed through a 1.2 metre wide viewing box using a floating weir that spanned the width of the river, and fish passage through the box was recorded 24 hours per day using both time-lapse recording and motion detection recording techniques. Study methods & equipment are described and results are presented from observations made from July to October 2002. Fish counts were broken down as tagged, untagged, or unknown tag status for each species in order to determine mark rates for the Nisga'a Fisheries fishwheel program. Additional data were collected on the colour of spaghetti tags on sockeye tagged at the lower Nass fishwheels in order to determine sockeye run timing from the lower Nass to the Kwinageese River.