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Network model parameters

Initial estimates of P/B ratios, diet and other information from various sources to be used to parameterize network model(s). Note: spreadsheet has multiple worksheets. Download excel file to view all sheets.
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Biomass PB QB


Group Biomass (t/km2) P/B (per yr) Q/B (per year) Ecotrophic efficiency P/Q Harvest (t/km2/yr) Accumulation (t/km2/yr) Trophic level  
Phytoplankton 41.46 200 0 0.6   0   1 Dalsgaard et al. Mass-Balance Model Reconstructions of the Strait of Georgia: the Present, One Hundred, and Five Hundred Years Ago. UBC Fisheries Report
Kelp & other macrophytes 20.3 4.43 0 0.021       1  
Herbivorous zooplankton 15.572 55 183.3 0.95   0   2  
Shellfish 220.5 0.5 5.6 0.258       2  
Grazing invertebrates 400 3.5 23 0.377       2.053  
Carnivorous zooplankton 33.035 12 40 0.95       2.4  
Predatory invertebrates 9.1 1.65 8.8 0.713       2.528  
Jellyfish 15 3 12 0.12   0   3.113  
Small pelagics 14.467 2 18 0.95       3.205  
Seabirds 0.02 0.1 91.7 0.044   0   3.3  
Misc. demersal fishes 12.6 1 4.2 0.435       3.372  
Lingcod 0.05 0.58 3.3 0.753       4.293  
Seals / sea lions 0.6 0.06 8.1 0.802   0   4.547  
Detritus - - - 0.938   0   1  
Sea otters 0.0001 0.13 101.5           Ainsworth et al. 2002 Ecosystem models of Northern British Columbia for the time periods 2000, 1950, 1900 and 1750. Fisheries Centre Research Reports 10(4).
Seals / sea lions 0.052 0.06 15.1            
Seabirds 0.0074 0.1 105.2            
Inshore rockfish 0.1 0.19 5.688            
Juvenile piscivorous rockfish 0.007 0.261 1.89            
Adult piscivorous rockfish 0.654 0.037 1.26            
Juvenile planktivorous rockfish 0.136 0.261 3.21            
Adult planktivorous rockfish 1.207 0.068 2.14            
Juvenile lingcod 0.031 1.2 3.3            
Adult lingcod 0.034 0.8 3.3            
Epifaunal invertebrates 13.448 1.448 16.089            
Carnivorous jellyfish 3 18 60            
Euphausiids 8.7 6.1 24.82            
Copepods 4.667 27 90            
Corals and sponges 1.9286 0.01 2            
Macrophytes 5.28 5.256 -            
Phytoplankton 15.406 178.502 -            
Phytoplankton 55.15 120 - 0.4 - 0 0 1 Field 2004 PhD Dissertation, 1990s Northern California Current Ecopath model
Infauna 35.7 2.5 12 0.84 0.21 0 0 2  
Amphipods 4.276 3.5 22 0.8 0.16 0 0 2  
Epibenthic 12.091 2 10 0.8 0.2 0.014 0 2.5  
Micro-zooplankton 3.693 100 300 0.8 0.33 0 0 2  
Copepods 15.614 14 70 0.8 0.2 0 0 2.2  
Euphausiids 25.238 8 40 0.8 0.2 0 0 2.1  
Carnivorous zooplankton 7.136 2 10 0.8 0.2 0 0 3.1  
Small jellies 1.114 9 30 0.8 0.3 0 0 2.3  
Large jellies 1.035 3 12 0.8 0.25 0.004 0 3.2  
Pandalid shrimp 1.5 2 10 0.8 0.2 0.417 0 2.8  
Benthic shrimp 1.548 2.5 12 0.8 0.21 0 0 3  
Dungeness crab 1.028 0.75 308 0.64 0.2 0.18 0 3.5  
Tanner crab 0.761 0.3 1.5 0.8 0.2 0 0 3  
Cephalopods 1.954 2 6 0.8 0.33 0.001 0 3.6  
Forage fish 25.71 1.5 6 0.8 0.25 0.035 0 3.2  
Mesopelagics 6.55 0.6 3 0.8 0.2 0 0 3.2  
Benthic fish 3.706 0.5 2.5 0.8 0.2 0 0 3.3  
Macrourids 0.468 0.2 1 0.31 0.2 0.003 0 3.7  
Sardine 1 0.5 5 0.93 0.1 0 0.2 2.8  
Mackerel 1.78 0.35 6 0.15 0.06 0 0 3.5  
Salmon 0.418 0.93 5.8 0.73 0.16 0.104 0 4.1  
Hake 28.925 0.18 2 0.69 0.09 2.924 -2.9 3.6  
Skates 0.421 0.2 2 0.78 0.1 0.034 0 4  
Dogfish 1 0.2 2.5 0.39 0.08 0.028 0 4.1  
Sablefish 1.472 0.09 2.1 0.9 0.04 0.122 -0.4 4.1  
Juvenile rockfish 0.616 1.5 6 0.8 0.25 0 0 3.3  
POP 0.298 0.08 2.1 0.72 0.04 0.021 -0.014 3.3  
Canary rockfish 0.214 0.11 1.7 0.78 0.07 0.038 -0.026 3.2  
Widow rockfish 1.486 0.16 2.2 0.43 0.07 0.122 -0.117 3.5  
Yellowtail rockfish 1.433 0.15 1.7 0.81 0.09 0.076 0.005 3.6  
Black rockfish 0.24 0.13 2 0.55 0.06 0.021 -0.018 4  
Shelf rockfish 0.828 0.13 2.2 0.66 0.06 0.059 -0.041 3.7  
Slope rockfish 0.585 0.06 1.9 0.86 0.03 0.037 -0.032 3.3  
Shortspine thornyhead 0.337 0.08 0.5 0.84 0.17 0.044 -0.023 4  
Longspine thornyhead 1.72 0.06 0.4 0.89 0.16 0.052 0 3.7  
Juvenile thornyhead 0.414 0.5 2.5 0.8 0.2 0 0 3.4  
Juvenile round 0.234 1.5 5.1 0.8 0.29 0 0 3.2  
Lingcod 0.522 0.3 2.4 0.17 0.13 0.032 -0.02 4.3  
Juvenile flatfish 1.154 1 4 0.8 0.25 0 0 3.1  
English sole 0.58 0.35 2.1 0.9 0.17 0.029 0.011 3.2  
Petrale sole 0.326 0.36 1.7 0.52 0.21 0.022 0 4.1  
Small flatfish 3.886 0.5 2.5 0.8 0.2 0.04 0 3.4  
Rex sole 0.4 0.5 2.1 0.82 0.24 0.009 0.006 3.1  
Dover sole 1.394 0.12 1.1 0.59 0.11 0.223 -0.072 3.1  
Arrowtooth 0.325 0.34 2.1 0.82 0.16 0.061 0 4.3  
Halibut 0.156 0.34 2.1 0.48 0.16 0.003 0.006 4.3  
Albacore 0.014 0.36 7.3 0.64 0.05 0 0 4.3  
Coastal sharks 0.05 0.18 2.8 0.49 0.06 0 0 4.4  
Shearwaters 0.003 0.1 138 0 0 0 0 4.2  
Murres 0.009 0.1 129 0.28 0 0 0 4.2  
Gulls 0.002 0.12 122 0 0 0 0 4.1  
Orcas 0 0.02 11.2 0 0 0 0 5  
Toothed whales 0.052 0.07 28.9 0.09 0 0 0 4.4  
Sperm whales 0.037 0.02 6.6 0.19 0 0 0 4.7  
Harbor seals 0.014 0.084 17.4 0.19 0.01 0 0 4.4  
Sea lions 0.038 0.074 16.4 0.22 0.01 0 0.001 4.5  
Fur seals 0.005 0.091 39 0.31 0 0 0 4.5  
Grey whales 0.033 0.037 8.9 0.14 0 0 0 3  
Baleen whales 0.16 0.037 7.6 0.22 0.01 0 0.001 3.6  
Fishery offal 10 - - 0.02 - 0   1  
Pelagic detritus 10 - - 0.02 - 0   1  
Benthic detritus 10 - - 0.09 - 0   1  
Spreadsheet's Author: Carrie Kappel
Last Updated with Excel 97
 
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by Carrie Kappel — last modified 30-10-2006 15:05
 
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