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All issues Volume 30 (2017) Aquat. Living Resour., 30 (2017) 7 Full HTML
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Table 2

Parameters of the 2012 Ecopath model of the Celtic/Biscay ecosystem (values in bold were estimated by Ecopath). TL: trophic level (dimensionless); B: biomass (t km−2); P/B: production/biomass (yr−1); Q/B: consumption/biomass (yr−1); EE: ecotrophic efficiency (dimensionless); P/Q: production/consumption (dimensionless); Y: landings (t km−2 yr−1); Acces.: accessibility to fishing (dimensionless) (see Supplementary Material S4 for the 1980 model).

  Group name TL B P/B Q/B EE P/Q Y2012 Acces.
1 Baleen whales 3.78 0.065 0.035 4.775 0.493 0.007 0 0.0
2 Toothed whales 4.61 0.033 0.135 11.998 0.816 0.011 0 0.0
3 Sharks L 4.77 0.063 0.18 1.8 0.8 0.1 0.0044 0.6
4 sharks/rays 4.14 0.266 0.35 3.5 0.800 0.1 0.0177 0.6
5 Whiting 4.34 0.209 0.37 5.708 0.953 0.065 0.0357 0.8
6 Mackerel 3.67 0.4 0.4 1.6 0.911 0.25 0.1341 0.4
7 Horse mackerel 3.57 1.342 0.43 1.72 0.949 0.25 0.2191 0.4
8 Anchovy 3.17 0.212 1.26 9.13 0.933 0.138 0.0136 0.8
9 Sardine 3.02 0.62 0.91 6.8 0.958 0.134 0.1121 0.8
10 Sprat 3.20 0.482 1.03 4.12 0.950 0.25 0.0157 0.8
11 Herring 3.48 0.893 0.59 4.59 0.684 0.129 0.0651 0.8
12 Pelagic M 3.41 0.227 0.73 4.92 0.95 0.148 0.0071 0.4
13 Pelagic L 4.22 0.115 0.4 4.13 0.9 0.097 0.0019 0.4
14 Hake 4.72 0.615 0.645 2.6 0.944 0.248 0.1622 0.6
15 Hake juv 4.35 0.141 1.228 6.176 0.934 0.199 0.0057 0.4
16 Cod 4.34 0.074 0.52 4 0.764 0.13 0.0231 0.8
17 Cod juv 3.82 0.009 0.67 9.141 0.926 0.073 0.0001 0.6
18 Sole 3.47 0.081 0.6 3.7 0.825 0.162 0.0196 0.8
19 Plaice 3.39 0.028 0.65 3.42 0.886 0.190 0.0071 0.8
20 Demersal L 3.98 1.415 0.244 1.22 0.950 0.2 0.1519 0.6
21 Pouts 3.82 0.865 1.316 6.58 0.950 0.2 0.0099 0.6
22 Blue whiting 3.71 1.384 0.484 2.42 0.95 0.2 0.0395 0.4
23 Demersal M 3.53 3.254 0.43 2.15 0.950 0.2 0.2793 0.4
24 Demersal S 3.28 2.093 1.09 4.36 0.95 0.25 0.0154 0.05
25 Monkfish 4.60 0.596 0.3 2.4 0.8 0.125 0.1096 0.8
26 Bathy L 4.27 1.038 0.14 0.7 0.9 0.2 0.0273 0.1
27 Megrim 4.33 0.229 0.36 1.8 0.885 0.2 0.0451 0.6
28 Bathy M 3.75 0.402 0.71 5 0.900 0.142 0.0043 0.05
29 Bathy S 3.25 0.836 1.87 10.97 0.9 0.170 0 0.0
30 Cephalopods 3.62 0.346 3.12 10.4 0.9 0.3 0.0607 0.1
31 Lobsters/crabs 3.37 1.445 1.2 8 0.9 0.15 0.0522 0.4
32 Shrimps/crabs 3.04 8.191 1.6 10.667 0.95 0.15 0.0021 0.02
33 Benthos 2.39 44.748 2.1 14 0.9 0.15 0.1286 0.01
34 Zooplankton L 2.51 14.033 4.3 16.9 0.9 0.254 0 0.0
35 Zooplankton S 2.02 13.220 29 120 0.900 0.242 0 0.0
36 Phytoplankton 1 27 100 0 0.588   0 0.0
37 Benthic produc. 1 38.047 4.4 0 0.2   0.1286 0.02
38 Detritus 1 130     0.227      

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