Fish care

Question 1

what areas would you consider when investigating fish health

Answer 1

1. environmental
2. diet
3. husbandry
4. water quality
5. observe group and individual behavior
6. identify individuals for sampling

Question 2

what is suspended culturing

Answer 2

lantern nets/trays are suspended from the water surface. allows natural feeding and protection from predators and competetive organisms

Question 3

list of species reared in suspended culturing

Answer 3

oysters and other shellfish

Question 4

list of species reared in cages

Answer 4

salmonoids, bass, bream, pangasius

Question 5

list of species reared in ponds

Answer 5

trout, shrimp, pangasius

Question 6

how are tanks used in rearing fish

Answer 6

All species in the early stages are reared in tanks.
Salmonids and halibut fish can remain in tanks once they have grown out of this stage.

Question 7

What is flow through?

water management system

Answer 7

Water passes through the system once, whilst providing the waste treatment as required. The water is discharged rather than re-circulating and repeat treatment.

Question 8

what is batch culture?

water management system

Answer 8

tank is filled with water, where a “batch” of larval species are added and allowed to grow.

often used for shrimp and larval stages of marine fish

Question 9

Explain the physiological changes that occur during smoltification

Answer 9

1. Altered body shape
2. Increased skin reflectance
3. altered physical appearance
4. altered behaviour
5. blood chloride and gill ATPase levels change