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

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

Species/stock Number detected at mouth Number detected at plume array Number detected at mouth and plume Percentage of estimated detections at plume array
North South Terminal Total plume
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%
  1. 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.