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SUMMARY DATA






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The table below summarises the stages of data processing that are involved in arriving at the final run estimate from the raw counter data.


Data process
2006
2007
Raw up counts (all species)
1426
1317
Raw down counts (all species, large proportion are eels).
317
681
Ups measured (from video) > 45cm
868
697
Downs measured (from video)> 45cm
50
46
Total ups > 45cm (includes estimate on unmeasured)
1300
1047
Total downs > 45cm (includes estimate on unmeasured)
140
69
Percentage increase based on counter efficiencies (from video validation)
9.16%
12.80%
Percentage increase due to leakage (see DIDSON)
15.77%
19.68%
Proportion of Salmon (of fish > 45 cm)
90% (Based on side view of 131 fish)
86% (Based on side view of 321 fish)
Nett salmon run estimate (of fish > 45 cm)
1319
1135
Nett Sea Trout estimate (of fish > 45cm)
147
185