Effects of three commercial harvesting Effects of three commercial harvesting methods on mussel beds effectsofthreeco00spar Year: 1983 â¦Commercial Diver does not use target criterion o r\ ^A. o oo ck: en LU A.^ OO CD C=3 a:: â <i: LxJ CD CJD PQ C=l n: â' oo Cd -⢠> <x. âºâ< Iâ1 100- 80- 60- 40- S 20- BAR DREDGE DIVER Figure 5. Selectivity of gear. Top graph: selectivity based on legal criterion for target mussels. Bottom graph: selectivity based on buyers' criteria for target mussels,

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