5.1.6 Fish Farming

Question 1

Where are most fish caught?

Answer 1

in the open ocean or in freshwater rivers and lakes (wild)

Question 2

What has lead to dramatic declines in many fish populatuins?

Answer 2

overfishing

Question 3

Fish farms are ways of raising, what?

Answer 3

large numbers of fish in a small space to provide food (protein) for humans

Question 4

What advantages does Fish Farms have over wild-caught fish

Answer 4

1. The ability to selectively breed fish to ensure high quality, fast-growing fish

Question 5

Within fish farms, large numbers of fish are kept in freshwater or seawater enclosures and are carefully monitored and controlled in many different ways, these methods include:

Answer 5

1. The control (and maintenance) of water quality

Question 6

(Fish Farming Methods) Maintenance of Water Quality

Answer 6

Water is filtered to remove waste and harmful bacteria to prevent diseases. Water is also cleaned to maintain high levels of oxygen for aerobic respiration.

Question 7

(Fish Farming Methods) Control of Intraspecific Predation

Answer 7

Intraspecific Predation: Predation within the same species.

Fishes are separted by size and age so they eat each other or fight

Question 8

(Fish Farming Methods) Control of Interspecific Predation

Answer 8

Interspecific Predation: Predation between different species.

Different species of fishes are separated by fences, nets and tanks to prevent fighting

Question 9

(Fish Farming Methods) Control of Disease

Answer 9

Antibiotics are given to fish to prevent disease which might otherwise spread quickly due to their close confinement, increasing the chances of survival. They are also kept in small numbers to minimise the spread of diseases

Question 10

(Fish Farming Methods) Removal of waste products

Answer 10

Water can be filtered to remove waste products such as faeces and sewage. Fences, Nets and Tanks are cleaned or location of fish can be changed to ensure clean water.

Question 11

(Fish Farming Methods) Quality and Frequency of feeding

Answer 11

Fish are fed food that is high in nutrients to ensure fast growth. They are fed frequently but in small amounts so they do not overeat or start eating each other.

Question 12

(Fish Farming Methods) Use of selective breeding

Answer 12

Fish are separated by gender so that selective breeding can be used by farmers to only allow fish with desired characteristics to reproduct. This ensures that the stock of fish is fast growing as they genes get passed on much more frequently