Fish nutrition

22 important questions on Fish nutrition

What two general types of fish feed are there?

Live feeds and formulated (atificial) feeds

Name two carnivorous fish spiecies

Tuna and salmon

What does detritivorous fish eat?

Material from the bottom of the sea etc
  • Higher grades + faster learning
  • Never study anything twice
  • 100% sure, 100% understanding
Discover Study Smart

What fish species has no stomach?

Common carp

What does RGL stand for?

Relative gut lenght

What 4 kinds of eaters are there? Concerning fish

Carnivores, herbivores, microphages and omnivores

What eating kind (fish) has the longest RGL?

Microphages (eat plankton, algae, bacteria)

What is meant with the gelatinization ratio of starch?

Changes in digestibility when starch is heated

Why are algae low digestible?

They have a very thick cell wall

Protein digestibility in fish feed depends on:

Inclusion by structural carbohydrates and the presence of NAFs

What disappears when a lot of SBM is fed? And for what species is this reversable?

Mucosal folds, common carp

What does NSP stand for?

Non starch polysacharides

What fish species is very bad at digesting/fermenting structural carbohydrates?

Atlantic salmon

What does PAP stand for?

Processed animal protein

Why is the maintenance in fish lower than in mammals and birds?

Fish are poikliothermic and less affected by gravity

Why is arginine essential in fish?

Arginine is needed in urea cycle, fish need it because they have low urea production

What two ways of N-extretion from the blood are there in fish?

Excretion as NH4+ by the gills
and as urea by the kidneys

What are the four functions of fatty acids in fish?

  1. Energy source
  2. structure (incorporation into membranes)
  3. precursor for eicosanoids
  4. carrier for fat-soluble vitamins

What is the impact of EFA in fish feed?

Good for the fish and good for the human eating it (n-3 fatty acid supply)

What can't marine fish make themselves?

ARA, EPA and DHA, they need those in their diet

Marine fish properties

  1. Blood hypotonic
  2. constant influx of minerals
  3. constant loss of water
  4. much water drinking
  5. minimal urine (concentrated)
  6. active mineral excretion

How does ammonia come in the water and what does it do for fish?

it comes in the water via faeceal losses and it is toxic for fish

The question on the page originate from the summary of the following study material:

  • A unique study and practice tool
  • Never study anything twice again
  • Get the grades you hope for
  • 100% sure, 100% understanding
Remember faster, study better. Scientifically proven.
Trustpilot Logo