5.8: Overfishing

Question 1

Fishery

Answer 1

Populations of fish used for commercial fishing

Question 2

Fishery collapse

Answer 2

When overfishing causes 90% population decline in a fishery

Question 3

Fishery collapse non recovery

Answer 3

The population might not recover due to:
* Decreased biodiversity leading to inability to find mates
* Inbreeding depression which reduces genetic diversity of fish population and species diveristy of ocean ecosystems if species are lost from the ecosystem

Question 4

Economics and fishery

Answer 4

It can lead to lost income fro fisherman and money in communities

Question 5

Bottom Trawling

Answer 5

Dragging a large net along the ocean floor

Question 6

Bycatch

Answer 6

Unintended species like dolphins, whales, turtles caught in nets

Question 7

What does bottom trawling do?

Answer 7

• Stirs up ocean sediment (turbidity) and destroys coral reef structure
• Decreases biodiversity by killing non-target species and remvoing coral reef habitat

Question 8

Smaller fish

Answer 8

• Depeltion of smaller fish population limits fishery recovery and decreases food supply up the food chain