Update on groundfish stock trends for the Gulf of Alaska

1
Update on groundfish stock trends for the Gulf
of Alaska
Sandra Lowe and James N. Ianelli Gulf of Alaska
Groundfish Plan Team
2
Pollock
3
ABC Summary
Change
Species
2002 ABC
Pollock
58,250
Pacific Cod
57,600
Flatfish
86,590
Arrowtooth flounder
146,260
Sablefish
12,820
POP
13,190
Northern rockfish
4,980
Shortraker/Rougheye
1,620
Other slope rockfish
5,040
5,490
Pelagic shelf rockfish
Demersal shelf rockfish
350
Thornyheads
1,990
Atka Mackerel
600
Total
Down 52,930 (12)
394,780
4
Pollock ABC conservation adjustment
5
Pollock ABC

• 34 Lower than projected in 2000 (for 2002)
• 21 due to change in biomass perception
• 13 due to additional conservation adjustment

6
Pollock ABC
1999 year class as estimated
Average 1999 year class
Author's adjustment
53,490
78,520
Maximum permissible
94,010
64,110
7
Pollock
8
Pollock Spawning biomass

• Spawning biomass (1,000s tons)
• 2002 158.3
• B40 245
• B20 123

9
Pollock optimism?
10
Pacific cod
11
ABC Summary
Change
Species
2002 ABC
Pollock
58,250
Pacific Cod
57,600
Flatfish
86,590
Arrowtooth flounder
146,260
Sablefish
12,820
POP
13,190
Northern rockfish
4,980
Shortraker/Rougheye
1,620
Other slope rockfish
5,040
5,490
Pelagic shelf rockfish
Demersal shelf rockfish
350
Thornyheads
1,990
Atka Mackerel
600
Total
Down 52,930 (12)
394,780
12
P. Cod Spawning biomass

• Spawning biomass (1,000s tons)
• 2002 82
• B40 85
• B20 43

13
Arrowtooth flounder
14
Flatfish 2002 ABCs86,590 tons total
15
ABC Summary
Change
Species
2002 ABC
Pollock
58,250
Pacific Cod
57,600
Flatfish
86,590
Arrowtooth flounder
146,260
Sablefish
12,820
POP
13,190
Northern rockfish
4,980
Shortraker/Rougheye
1,620
Other slope rockfish
5,040
5,490
Pelagic shelf rockfish
Demersal shelf rockfish
350
Thornyheads
1,990
Atka Mackerel
600
Total
Down 52,930 (12)
394,780
16
Sablefish
17
ABC Summary
Change
Species
2002 ABC
Pollock
58,250
Pacific Cod
57,600
Flatfish
86,590
Arrowtooth flounder
146,260
Sablefish
12,820
POP
13,190
Northern rockfish
4,980
Shortraker/Rougheye
1,620
Other slope rockfish
5,040
5,490
Pelagic shelf rockfish
Demersal shelf rockfish
350
Thornyheads
1,990
Atka Mackerel
600
Total
Down 52,930 (12)
394,780
18
Sablefish spawning biomass

• Spawning biomass (1,000s tons)
• 2002 193
• B40 221

19
Pacific ocean perch
20
Slope Rockfish 2002 ABCs24,830 tons total
21
ABC Summary
Change
Species
2002 ABC
Pollock
58,250
Pacific Cod
57,600
Flatfish
86,590
Arrowtooth flounder
146,260
Sablefish
12,820
POP
13,190
Northern rockfish
4,980
Shortraker/Rougheye
1,620
Other slope rockfish
5,040
5,490
Pelagic shelf rockfish
Demersal shelf rockfish
350
Thornyheads
1,990
Atka Mackerel
600
Total
Down 52,930 (12)
394,780
22
Rockfish spawning biomass

• Spawning biomass (1,000s tons)
• POP
• 2002 107
• B40 99
• Northern
• 2002 40
• B40 23

23
Pelagic shelf rockfish biomass
Dusky, widow, yellowtail
24
Pelagic shelf rockfish catch
Dusky, widow, yellowtail
25
ABC Summary
Change
Species
2002 ABC
Pollock
58,250
Pacific Cod
57,600
Flatfish
86,590
Arrowtooth flounder
146,260
Sablefish
12,820
POP
13,190
Northern rockfish
4,980
Shortraker/Rougheye
1,620
Other slope rockfish
5,040
5,490
Pelagic shelf rockfish
Demersal shelf rockfish
350
Thornyheads
1,990
Atka Mackerel
600
Total
Down 52,930 (12)
394,780
26
Demersal shelf rockfish
27
ABC Summary
Change
Species
2002 ABC
Pollock
58,250
Pacific Cod
57,600
Flatfish
86,590
Arrowtooth flounder
146,260
Sablefish
12,820
POP
13,190
Northern rockfish
4,980
Shortraker/Rougheye
1,620
Other slope rockfish
5,040
5,490
Pelagic shelf rockfish
Demersal shelf rockfish
350
Thornyheads
1,990
Atka Mackerel
600
Total
Down 52,930 (12)
394,780
28
Thornyheads
29
ABC Summary
Change
Species
2002 ABC
Pollock
58,250
Pacific Cod
57,600
Flatfish
86,590
Arrowtooth flounder
146,260
Sablefish
12,820
POP
13,190
Northern rockfish
4,980
Shortraker/Rougheye
1,620
Other slope rockfish
5,040
5,490
Pelagic shelf rockfish
Demersal shelf rockfish
350
Thornyheads
1,990
Atka Mackerel
600
Total
Down 52,930 (12)
394,780
30
Thornyhead spawning biomass

• Spawning biomass (1,000s tons)
• 2002 87
• B40 78

31
Summary by biomass
32
Projected biomass by species4.48 million tons
total
33
Summary by ABCs
34
Projected ABCs by species394 thousand tons total