Ecological Archives A022-041-A4

Éva E. Plagányi and Doug S. Butterworth. 2012. The Scotia Sea krill fishery and its possible impacts on dependent predators: modeling localized depletion of prey Ecological Applications 22:748–761.

Appendix D. Reference observations from Hill et al. (2008) for validating and tuning operating models for krill fishery management.

TABLE D1. Numerical calendar of krill biomass (scaled to mean = 1) for the two groupings of SSMUs identified in the SAM calendar.

Year Subareas
48.1 & 48.2
Subarea
48.3
1970 1.41 1.30
1971 1.41 1.30
1972 1.41 1.30
1973 1.41 1.30
1974 1.41 1.30
1975 1.41 1.30
1976 1.41 1.30
1977 1.41 1.30
1978 1.41 1.30
1979 1.41 1.30
1980 1.41 1.30
1981 1.41 1.27
1982 1.41 1.23
1983 1.41 1.20
1984 1.41 1.17
1985 1.41 1.14
1986 0.70 1.10
1987 0.70 1.07
1988 0.70 1.04
1989 0.70 1.01
1990 0.70 0.97
1991 0.70 0.94
1992 0.70 0.91
1993 0.70 0.88
1994 0.70 0.84
1995 0.70 0.81
1996 0.70 0.78
1997 0.70 0.75
1998 0.70 0.71
1999 0.70 0.68
2000 0.70 0.65
2001 0.70 0.65
2002 0.70 0.65
2003 0.70 0.65
2004 0.70 0.65
2005 0.70 0.65
2006 0.70 0.65
2007 0.70 0.65

TABLE D2. Numerical calendar for the abundance of generic penguins: abundance in “observation years” identified in the literature and at key points in the SAM calendar.

SSMU Observation
year
Empirical abundance
estimate
1977 1980 2007
1 APPA          
2 APW 1987 253873 400726   101895
3 APDPW 1987 74798 118065   30021
4 APDPE 1990 1084367 1962804   499095
5 APBSW 1971 1160224 1790575   455301
6 APBSE 1985 298817 430517   109470
7 APEI 1977 1413511 1413511   359423
8 APE 1985 823403 1186308   301650
9 SOPA          
10 SOW 1983 2286 3006   764
11 SONE 1983 584507 768650   195450
12 SOSE 1983 2003958 2635284   670091
13 SGPA          
14 SGW 1977 6642811   6642811 3653546
15 SGE 1977 564496   564496 310473

TABLE D3. Numerical calendar for the abundance of generic seals.

SSMU Empirical abundance
estimate (1991)
1995 1988 2007
1 APPA        
2 APW        
3 APDPW 12204 18974   18974
4 APDPE 211 328   328
5 APBSW        
6 APBSE        
7 APEI 1002 1558   1558
8 APE        
9 SOPA        
10 SOW        
11 SONE        
12 SOSE        
13 SGPA        
14 SGW 611054   511541 1576913
15 SGE 6090   5098 15716

TABLE D4. Numerical calendar for the abundance of generic baleen whales. The final three columns sum data for the Antarctic Peninsula and Scotia Sea areas into a single SSMU in each.

SSMU Empirical abundance
estimate (2000)
1980 2007 2000 1980 2007
1 APPA 9233 3098 13531 13788 4626 20207
2 APW 767 257 1124      
3 APDPW 330 111 484      
4 APDPE 341 114 500      
5 APBSW 460 154 674      
6 APBSE 600 201 879      
7 APEI 773 259 1133      
8 APE 1284 431 1882      
9 SOPA 6808 2244 10039 15694 5173 23143
10 SOW 131 43 193      
11 SONE 86 28 127      
12 SOSE 126 42 186      
13 SGPA 7737 2550 11409      
14 SGW 354 117 522      
15 SGE 452 149 667      

TABLE D5. Estimates of krill density (kg·km-2) and the abundance of generic penguins, seals and whales in 1970. The final column sums whale data for the Antarctic Peninsula and Scotia Sea areas into a single SSMU in each.

SSMU Krill
density
Penguins Seals Whales Whales
(2 areas)
1 APPA 22.4     1794 2680
2 APW 75.4 241540   149  
3 APDPW 75.4 71164 1203 64  
4 APDPE 75.4 1183090 21 66  
5 APBSW 75.4 1079278   89  
6 APBSE 75.4 259496   117  
7 APEI 75.4 852001 99 150  
8 APE 75.4 715053   250  
9 SOPA 49     1288 2970
10 SOW 300.8 1811.99   25  
11 SONE 300.8 463307   16  
12 SOSE 300.8 1588430   24  
13 SGPA 49     1464  
14 SGW 78.6 6642811 70208 67  
15 SGE 78.6 564496 700 86  

LITERATURE CITED

Hill, S., J. Hinke, É. E. Plagányi, and G. Watters. 2008. Reference observations for validating and tuning operating models for krill fishery management in area 48. Workshop document presented to WG-SAM subgroup of CCAMLR (Commission for the Conservation of Antarctic Marine Living Resources), WG-SAM-08. 16 pp.


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