REPORT OF THE WORKSHOP ON TRAWL SURVEY ... - FAO.org
REPORT OF THE WORKSHOP ON TRAWL SURVEY ... - FAO.org
REPORT OF THE WORKSHOP ON TRAWL SURVEY ... - FAO.org
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(a) Landings<br />
16000<br />
Landings<br />
14000<br />
12000<br />
10000<br />
8000<br />
6000<br />
4000<br />
2000<br />
0<br />
(b) Trends in fishing mortality<br />
2.5<br />
2.0<br />
F(2-4): landings assumed correct<br />
1.5<br />
1.0<br />
0.5<br />
0.0<br />
2.5<br />
2.0<br />
F(2-4): catch bias estimated for 2000-2005<br />
1.5<br />
1.0<br />
0.5<br />
0.0<br />
1970<br />
1972<br />
1974<br />
1976<br />
1978<br />
1980<br />
1982<br />
1984<br />
1986<br />
1988<br />
1990<br />
1992<br />
1994<br />
1996<br />
1998<br />
2000<br />
2002<br />
2004<br />
1970<br />
1972<br />
1974<br />
1976<br />
1978<br />
1980<br />
1982<br />
1984<br />
1986<br />
1988<br />
1990<br />
1992<br />
1994<br />
1996<br />
1998<br />
2000<br />
2002<br />
2004<br />
1968<br />
1970<br />
1972<br />
1974<br />
1976<br />
1978<br />
1980<br />
1982<br />
1984<br />
1986<br />
1988<br />
1990<br />
Landings (t)<br />
1992<br />
1994<br />
1996<br />
1998<br />
2000<br />
2002<br />
2004<br />
2006<br />
F(2-4)<br />
F(2-4)<br />
Fig. 6. Irish Sea cod assessment. (a) shows the time series of official landings (solid line),<br />
WG estimates of total landings based on a sampling scheme (solid squares) and<br />
estimates of total removals and 95% confidence intervals from B-Adapt run using WG<br />
landings estimates to 1999 and official landings from 2000 onwards. (b) retrospective<br />
trends in F-estimates when no bias is estimated for 2000 onwards (top plot) and when<br />
bias is estimated using B-Adapt (bottom plot)<br />
62
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