Lesson 11: Farming techniques/ sustainable fisheries

Question 1

How can the efficiency of food production be improved?

Answer 1

• The efficiency of food production can be improved by restricting energy
  transfer from food animals to the environment.

Question 2

How can we reduce the amount of energy that is transferred from grazing animals to their environment?

2 main ways.

Answer 2

• Controlling their movement.
• Controlling the temperature of their surroundings.

Question 3

Give 2 disadvantages of rearing food animals indoors.

Answer 3

1.) Disease will spread quickly to all cows (indoors.)
2.) Aggressive behaviour (of animals to each other/ from humans) can cause harm

Question 4

Give a way food animals are taken care off to ensure that they grow (so can supply enough meat.)

Answer 4

• Some animals are fed high protein foods to increase growth.

Question 5

True or False

Fish stocks, in the ocean, are increasing.

Answer 5

• False.
• Fish stocks are declining.

Question 6

At what level must fish stocks, in oceans, be maintained? If fish stocks aren’t maintained, what could happen?

Answer 6

• Maintain fish stocks at level where breeding continues.
• If fish stocks aren’t maintained, certain species may disappear all together in some areas.

Question 7

What 2 main human improvements (to do with fishing) have played important roles in the conservation of fish stocks at a sustainable level?

2!!

Answer 7

1.) Control of net size.
2.) Introduction of fishing quotas (kind of like a license…)