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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.


 
2006
2007
2008
2009
2010
2011
2012
2013 (6 months data)
2014 (5 months full & 7 months partial data)
2015
Nett salmon run estimate
1319
1135
810
743
605
782
763
306
428
1181
Nett Sea Trout estimate
147
185
325
192
165
-
49
103
220
338
Raw up counts (all species)
1426
1317
1016
1139
1071
1029
702
309
545
1291
Raw down counts (all species, large proportion are eels).
317
681
501
283
259
180
537
21
25
61
Ups measured (from video) > 45cm
868
697
503
598
250
146
75
87
128
745
Downs measured (from video)> 45cm
50
46
11
1
3
0
0
0
2
12
Total ups > 45cm (includes estimate on unmeasured)
1300
1047
703
721
596
533
190
280
421
1221
Total downs > 45cm (includes estimate on unmeasured)
140
69
21
1
3
14
5
4
2
45
Percentage increase based on counter efficiencies (from video validation)
9.16%
12.80%
1.48%
4.17%
5.96%
-
24%
22%
18.89%
15.71%
Percentage increase due to leakage (see DIDSON)
15.77%
19.68%
36.59%
0%
0%
0%
0%
0%
0%
0%

 

 


  

The raw data shown in the graph below represents the maximum (black bars) and average (red line) number of fish detected moving upstream per day since 1st Feb 2006 and is intended as a guide only.


MaxAve.jpg