Chapter 14: Fisheries

Question 1

What is a fishery?

Answer 1

• The industry devoted to commercial fishing OR

- The Places where fish re caught, harvested, processed, and sold

Question 2

Why are fishers important?

Answer 2

• Over 15% of the world population relies on fish

- Yearly revenue of 130 billion $

Question 3

What is a collapsed fishery?

Answer 3

A collapsed fishery exists when a commercial fishery’s annual catches fall below 10% of their historic high

Question 4

What causes a fishery to collapse?

Answer 4

• Technological advances
• Increasing demand for fish
• Tragedy od the commons
• Discounting future value

Question 5

Consequences of advancing technology (in fishing)?

Answer 5

• enables fishers to travel further into ocean, catch more fish…leads to declines in fish stock
• Pollution
• Bycatch
• Damage to seabed (trawling)

Question 6

Fishing Social Traps: tragedy of the commons/discounting the future value of fish

Answer 6

• As nobody owns the ocean, it makes sense, ‘if I don’t fish it someone else will’
• leads to overuse and harm to fish stock

Question 7

Maximum Sustainable Yield (MSY)

Answer 7

The amount of fish that can be harvested without decreasing the yield in future years

Question 8

What percentage of fishers are sustainably fished? Is this a problem?

Answer 8

68%.. this is better than it looks, because the 32% of global marine fisheries that are overexploited are more important

Question 9

What is an overexploited fishery?

Answer 9

A fishery in which more fish are harvested than is sustainable in the long run, leading to population decline and possibly a depleted fishery.

Question 10

What is a depleted fishery?

Answer 10

A depleted fishery exists when the fish population is well below historic levels and the population’s reproductive capacity is low, meaning that recovery will occur slowly, if at all

Question 11

What is ‘fishing down the food chain’?

Answer 11

Fishing down the food chain refers to fishers pursuing fish lower on the food chain because higher-trophic-level species have been overfished

Question 12

What is the relationship between hydroids and cod??

Answer 12

Declines in code and their prey increase hydroid populations making it hard for cod to recover- hydroids and young cod eat the same food and hydroids feed on the young cod

Question 13

Potential solutions to protect fisheries

Answer 13

• Exclusive economic zones
• Marine protected areas
• Marine Reserves
• Sustainable fishery

Question 14

How much fish does agriculture provide to world?

Answer 14

More than half of all the seafood consumed worldwide is provided by agriculture

Question 15

What are the two types of shrimp species consumed most by agriculture

Answer 15

Tiger prawn

White leg shrimp