[23] Fish Farming

What methods are used to farm large numbers of fish?

• Cages in the sea or lakes – Fish are kept in large nets or cages in natural water, allowing water to flow through but preventing fish from escaping.

• Tanks on land – Fish are reared in artificial ponds or tanks where conditions such as temperature, oxygen, and waste levels can be carefully controlled.

Why are fishes kept in cages during fish farming

to stop them using as much energy swimming about

what does the cage protect the fish from

being eaten than birds or seals

what are fishes fed in a cage

a diet of food pellets that is carefully controlled to maximize the amount of energy they get. the better the quality of food, the quicker and bigger the fish will grow

what is fish a good source of?

protein

where are young fish reared in and why?

special tanks to ensure as many survive as possible

why is it important to keep young fish separate from bigger fish

to make sure that big fish don’t eat little fish

what does intraspecific predation mean

where organisms eat individuals of the same species

what are fish in cages prone to

disease and parasites

what is an example of a pest that can be in fish farm cages and what can they be treated by

sea lice which can be treated with pesticides

what are advantages of fish farming using tanks?

water can be monitored to check the temperature, pH and oxygen level is ok

easy to control how much food is supplied and give the exact right sort of food

water can be removed and filtered to get rid of waste food and fish faeces keeeping the water clean for fish and avoids pollution wherever the water ends up