Summary: Aquaculture And Fisheries

Read the summary and the most important questions on Aquaculture and fisheries

• 1 Week 1

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• What does capture fisheries stand for?

  The capture/harvest of aquatic organisms from their natural environment. Fish stock is 'common property'

• 1.1 College 1

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• What is marine biotechnology?

  The farming of (marine) organisms, mostly invertebrates such as sponges, corals sea fans and algae -> for non food purposes -> such as fine chemicals and pharmacy extraction

• When do aquaculture and marine biotechnology meet each other?

  When the organisms are culled for purposes like fine chemical production and pharmacy extraction

• What is aquatic production?

  The increase of aquatic biomass in time. Stock or population is the basic unit

• Where is the MSY in logistic growth?

  MSY will be exactly at the half of the carrying capacity of a species -> in this stage the population growth is highest

• What does optimal sustainable yield mean?

  The level of effort that maximizes the difference between total revenue and total cost OR when marginal revenue = marginal cost

• What are disciplines of aquaculture?

  • Genetics, broodstock management
    
  • reproduction
  • larval rearing (including live food culture)
  • feeds, feeding, nutrition
  • health care, disease management
  • water quality management
  • engineering

• What makes the aquatic animals environment special?

  • Water had high density (compared to air)
    
  • low O2 concentration
  • rich in microbial organisms

• What are 5 important attributes of aquatic animals?

  • Cold blooded (poilkilothermic)
    
  • difficulty using carbohydrates -> principal energy source is fat (lipids)
  • gas exchange through gills or cutaneous (skin) diffusion
  • different reproduction modes (hermaphroditism is common)
  • many (invertebrates) derive structure form calcareous material (-> corals, shellfish)

• In what 2 ways does capture fisheries influence biodiversity?

  It influences:
  

  1. the ecological balance in the ecosystem
  2. the habitats (living environment)