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California Department of Fish and Game staff release adult salmonids captured in a seine net used to sample the Klamath estuary. The fish at right is a fall Chinook. Although the study primarily targets juvenile salmonids, adults may be captured during late summer samples. A seine net has floats on the top and a lead line on the bottom. A boat is used to make a circle with the net, then the net is dragged to shore with the net closed up like a bag. Photo courtesy of Mike Wallace, CDFG, Arcata, CA. Use Pan function or click Fit to see whole image. Press F1 for help in use of Picture tools.


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Large adult female steelhead is released from an August 2000 seine haul in the Klamath River estuary. Although Klamath and Trinity River steelhead enter the estuary during summer and fall, they may not spawn until February or March of the following year. Photo courtesy of Mike Wallace, CDFG, Arcata, CA.


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Juvenile salmonids such as this steelhead are the target of CDFG estuary seining. This steelhead has retained its parr marks and is not the typical bright silver of a salmonid in its smolt phase. Photo courtesy of Mike Wallace, CDFG, Arcata, CA.


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Mike Wallace places an anaesthetized juvenile salmonid on a measuring board to gauge its length while Mary Clair Kier works up fish in the background. Photo courtesy of Mike Wallace, CDFG, Arcata, CA.


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Mike Wallace, CDFG biologist, takes a scale sample of a juvenile Chinook salmon. Scales allow the age of juvenile fish to be gauged and growth rates analyzed. Photo courtesy of Mike Wallace, CDFG, Arcata, CA.


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Mary Clair Kier marks a juvenile salmonid with a pan-jet marking device that allows CDFG to track individual fish to gauge the length of their stay in the estuary. Photo courtesy of Mike Wallace, CDFG, Arcata, CA.


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The photo above shows a juvenile coastal cutthroat captured during estuary seining. The silver color of the fish suggests it is in its smolt phase and headed for the ocean. The tiny red dot at the top of the fleshy part of its tail (caudal fin) is a pan-jet mark. Photo courtesy of Mike Wallace, CDFG, Arcata, CA.