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12 Cards in this Set
- Front
- Back
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methods of line fishing |
pole and line fishing Long line fishing |
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Methods of net fishing |
Surrounding net Seine net Bottom otter trawls Dredge Fishing |
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which types of fishing reduce by-catch? |
sustainable long line fishing pole and line fishing
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What methods of fishing catch demersal fish? |
Seine nets Bottom Otter trawls |
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Methods of making fishing more sustainable |
Quotas time zoning Space zoning smaller mesh sizes smaller or less boats flag long line fishing pole fishing MSY |
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Formula for fishing effort |
Fishing effort = Fishing Times Fishing activity (FA) capacity (FC) (FA) |
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Effects of Subsidies |
Increased efforts to make more profit massive over fishing collapse of fishery Decommissioning of boats Mass unemployment |
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What is TAC ? |
Total allowable catch ( cap on fish that can be caught per area) |
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What is maximum sustainable yield? |
The amount of fish that could be caught per year whilst maintaining the population of wild fish |
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How is MSY calculated? |
Recruitment +growth = catch +morality |
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Factors controlled in Aquaculture |
Oxygen levels Temperature pH Ammonia levels light levels |
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where is there most productivity in the oceans? |
The coastal margins where there are cold upwelling currents |
