Table 8

Table 8. Relative efficiencies (and 95% confidence intervals) of effort parameters for detecting 20-year trends in various targets. Elements in the table represent power proportions divided by cost proportions for each effort parameter, excluding stations. An efficiency value greater than one indicates that the effort parameter is efficient. Target codes are as in Fig. 2.

Target

Sites

Frequency

Surveys

Mean

CL

Mean

CL

Mean

CL

BCCH

2.315

(2.186, 2.457)

1.591

(1.476, 1.716)

0.742

(0.701, 0.779)

BHCO

2.138

(2.037, 2.252)

1.104

(1.014, 1.196)

0.875

(0.844, 0.904)

BGNW

1.159

(1.109, 1.211)

0.138

(0.112, 0.164)

1.146

(1.136, 1.156)

GRJA

5.121

(4.256, 6.413)

4.833

(4.043, 6.011)

-0.017

(-0.330, 0.192)

PIWO

2.117

(1.952, 2.307)

1.884

(1.722, 2.068)

0.704

(0.648, 0.753)

WBNU

4.668

(4.027, 5.545)

5.134

(4.446, 6.075)

0.141

(-0.057, 0.286)

YWAR

1.686

(1.622, 1.751)

0.356

(0.312, 0.399)

1.030

(1.013, 1.047)

GN

1.532

(1.409, 1.658)

0.374

(0.328, 0.420)

1.024

(1.006, 1.040)


Target	Sites		Frequency		Surveys

	Mean	CL	Mean	CL	Mean	CL

BCCH	2.315	(2.186, 2.457)	1.591	(1.476, 1.716)	0.742	(0.701, 0.779)
BHCO	2.138	(2.037, 2.252)	1.104	(1.014, 1.196)	0.875	(0.844, 0.904)
BGNW	1.159	(1.109, 1.211)	0.138	(0.112, 0.164)	1.146	(1.136, 1.156)
GRJA	5.121	(4.256, 6.413)	4.833	(4.043, 6.011)	-0.017	(-0.330, 0.192)
PIWO	2.117	(1.952, 2.307)	1.884	(1.722, 2.068)	0.704	(0.648, 0.753)
WBNU	4.668	(4.027, 5.545)	5.134	(4.446, 6.075)	0.141	(-0.057, 0.286)
YWAR	1.686	(1.622, 1.751)	0.356	(0.312, 0.399)	1.030	(1.013, 1.047)

GN	1.532	(1.409, 1.658)	0.374	(0.328, 0.420)	1.024	(1.006, 1.040)