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Salmonid Escapement Enumeration on the Keogh River: A Demonstration of a Resistivity Counter in British Columbia McCubbing, D. J. F.
2000
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Abstract: A Logie 2100C resistivity fish counter was installed in the Keogh River in the summer of 1997. Data were collected on fish numbers, sizes and time of migration and compared to alternative methods of enumeration (area-under-the-curve (AUC) and mark-recapture estimates). Counter escapement estimates of 8246 coho adults, 8505 pink salmon and 92 steelhead adults were calculated based on observed counter efficiency through video validation techniques. AUC estimates for pink salmon were higher (15,631 adults) in part due to some escapement into the river occurring before counter operations began. Coho AUC estimates varied and were very dependent on the values used for residence time in the stream count areas. AUC estimates ranged from 5411 to 13,060 adults with no confidence limits available due to low tag resightings. Mark-recapture data for steelhead predicted a similar value for escapement to counter data, with an estimate of 98 fish. Counter efficiency was observed to be above 80% (mean 93%) in all environmenta
 
McCubbing, D. J. F., Ward, B.; Burroughs, L.. 2000. Salmonid Escapement Enumeration on the Keogh River: A Demonstration of a Resistivity Counter in British Columbia. BC Fisheries. Fisheries Technical Circular. 104
 
Topic: Conservation + Mgmt (Wildlife, Fish, Plant)
Keywords: Keogh River, escapement, enumeration, steelhead, mark-recapture, area-under-the-curve, AUC, estimates, counter efficiency
ISSN:  Scientific Name: Oncorhynchus gorbuscha, Oncorhynchus mykiss, Oncorhynchus kisutch
ISBN:  English Name: Coho Salmon, Pink Salmon, Rainbow Trout
Other Identifier: FTC104, FTC 104
 
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