System A 42 201 192 52 10 305 10 1 350 59 System B 55 195 204 40 12 290 13 1 320 65 Phosphate 40 49 38 48 40 Nitrogen 50 41 53 39 40 47 Skate 1.00 0.53 0.41 0.70 0.70 0.59 0.82 0.80 0.53 0.70 0.68 Dogfish 0.51 0.74 0.84 0.80 0.60 0.74 0.82 0.73 0.98 0.59 0.74