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Table IV-3. Required
years and declining-trend threshold abundances for different coefficients
of variation, assuming a = ß = 0.25, and
a 5-yr safety cushion. |
|
CV
|
Number of
Annual
Surveys
to Detect
r = -0.1
|
Initial N
to End
at 1,500
|
Number of
Quadrennial
Surveys
to Detect
r = -0.1
|
Initial N
to End
at 1,500
|
|
0.1
|
8
|
3,338
|
13
|
5,504
|
|
0.2
|
9
|
3,689
|
17
|
8,211
|
|
0.3
|
11
|
4,506
|
17
|
8,211
|
|
0.4
|
13
|
5,504
|
17
|
8,211
|
|
0.5
|
14
|
6,083
|
17
|
8,211
|
|
0.6
|
15
|
6,723
|
21
|
12,249
|
|
0.7
|
16
|
7,430
|
21
|
12,249
|
|
0.8
|
17
|
8,211
|
21
|
12,249
|
|