Fisheries test
5 important questions on Fisheries test
When does fishery management work best generally?
Why do fishers like to use selective gears?
What two questions need to be answered for an precautionary approach?
- What is the level of fishing mortality taking place?
- what is the level of spawning stock biomass? (SSB)
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What happens to the selection factor (SF) when fishes become more slender and why?
- SF is a shape indicator: fish length compared to mesh size
- if a fish is slender, it will be able to escape through the mesh at longer lengths than fish with a wider body
- thus the more slender the fish, the larger the SF
What are the 3 components of a fishery system according to Charles? (2001)
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