Total marine fisheries extractions by country in the Baltic Sea

Catch ( t x 10 4 )
Total marine fisheries extractions by country in the Baltic Sea: 1950-present, Rossing, Booth and Zeller 133
(323,414 t) of the adjustments, respectively. Flatfish and salmon had minor adjustments made to the ICES
landing statistics, with flatfish accounting for 2% (54,866 t) and salmon 0.2% (7,414 t).
From 1991-2007, there was a total of
836 t in adjustments to ICES landing
statistics. The majority of this was
explained by adjustments to cod data,
which had a net increase of 656 t.
Flatfishes were the group with the next
largest adjustment to ICES landing
statistics, with a total of 112 t. The
group ‗others‘ had a total adjustment of
48 t, and salmon had an increase of
20 t. Herring and sprat data had no
adjustments during this time period.
Table 7. Decadal totals of adjustments to ICES landing statistics for
Latvia (t).
Common
name
1950-
1959
1960-
1969
1970-
1979
1980-
1989
1990-
1999
2000-
2007
Cod 181,990 171,990 227,550 276,192 6,015 22
Herring 206,340 331,000 396,766 349,485 34,318 0
Sprat 18,910 83,950 293,056 83,863 16,412 0
Salmon 660 1,410 1,433 3,287 621 6
Flatfishes 12,580 23,010 15,469 3,165 625 16
‘Others’ 17,460 83,500 207,109 14,304 1.027 14
Unreported landings
Unreported landings were assumed to have
begun in Latvia following their separation
from the USSR, and in 1991, the estimated
unreported landings were 4,846 t (Figure
3). This increased to a peak of 21,890 t in
1997, and by 2007 had decreased to 13,586 t
(Figure 3). The total unreported landings
for 1991-2007 was estimated to be 248,608
t and accounted for approximately 6% of
our reconstructed total for the same period.
Sprat had the highest estimated unreported
landings, with an estimated total of
approximately 110,000 t from 1991-2007
(Table 8), adding an additional 16% to the
reported sprat landings. In 1991, the estimated unreported sprat landings were 1,260 t. This increased to
11,096 t in 1997, and decreased to 6,771 t by 2007. The species with the next largest contribution to
unreported landings was herring with 74,679 t from 1991-2007, which added an additional 17% t reported
herring landings. Unreported herring landings were estimated to have been 2,820 t in 1991, rose to a peak
of 5,866 t in 1996, and then declined to 3,361 t by 2007. Unreported cod landings contributed almost as
Table 8. Decadal totals of unreported
landings for Latvia (t).
Common
name
1950-
1989
1990-
1999
2000-
2007
Cod 0 31,610 29,969
Herring 0 44,218 28,923
Sprat 0 54,973 55,023
Salmon 0 293 109
Flatfishes 0 794 907
‘Others’ 0 1,198 590
Discards
2.5
2.0
1.5
1.0
Flatfish
Herring
0.5
Cod
0.0
1950 1960 1970 1980 1990 2000
Year
Figure 3. Latvia‘s unreported landings by taxa, 1950-2007.
much as herring to total unreported landings, with an estimated
61,579 t from 1991-2007 (Table 8), but this corresponded to an
additional 74% of reported cod landings. Unreported cod
landings were an estimated 657 t in 1991, increased to a peak of
6,556 t in 1996, and then decreased to 3,202 t at the end of the
time series. The group ‗others‘ (totaling 1,788 t) and flatfish
(totaling 1,701 t) contributed an additional 17% and 15% to
reported landings for these two groups, respectively. Salmon
contributed the least with 403 t from 1991-2007, adding an
additional 17% to reported salmon landings.
Discards are comprised of four components (ghostfishing, underwater discards, boat-based discards and
seal-damaged discards), and these were estimated to total 228,270 t throughout the time series (Figure 4).
Discards were estimated to be 1,044 t at the beginning of the time series, and increased to a first peak of
6,303 t in 1974. From 1975-1994, discards averaged 3,662 t·year -1 . For the most recent period, discards
increased again, and averaged 5,940 t annually from 1995-2007, with a peak of 7,280 t in 2005 (Figure 4).
Sprat