Juvenile salmonid migratory behavior at the mouth of the Columbia River and within the plume

Table 1 Tag detection summary for juvenile salmonids at the Columbia River mouth (rkm 8.3, 4.5, 2.8) and plume sub-arrays

Species/stock	Number detected at mouth	Number detected at plume array				Number detected at mouth and plume	Percentage of estimated detections at plume array
Species/stock	Number detected at mouth	North	South	Terminal	Total plume	Number detected at mouth and plume	Percentage of estimated detections at plume array
CH1	3,500	150	125	363	638	585	16%
STH	1,748	55	58	89	202	182	10%
CH0	2,911	488	197	176	861	811	26%
Total	8,159	693	380	628	1,701	1,578	18%

Detection probabilities for each species were applied to the number of detections at the plume array (CH1 = 0.85, STH = 0.83, CH0 = 0.89). CH1, yearling Chinook salmon; STH, steelhead; CH0, subyearling Chinook salmon.

ISSN: 2050-3385