Fishery Management
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This category is the top of the "food chain". Ideally every other category should be a subcategory of this or a lower-level one, and can be a subcategory of two or more.

Where two categories overlap in content (eg Africa and Northern Hemisphere), they can each have a link to the other in their text portions but (to avoid circularity and other confusions) neither should be a subcategory of the other.

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