Some definitions.
Fisheries: aquaculture and capture fisheries
Capture fisheries: capture/harvest of aquatic organisms (from seaweed to fish) from their
natural environment.
Stocks are common property
Aquaculture: the cultivation of aquatic organisms, from algae to fish.
Cultivation under controlled conditions.
Stocks are owned
Mariculture: aquaculture in a marine environment
Marine biotechnology: the extraction of fine chemicals or pharmacological products from marine
organisms.
Aquatic production: increase of biomass in time.
Recruitment natural mortality
Growth Harvest
Biomass
Capture fish VS aquaculture
CAPTURE FISHERIES AQUACULTURE
Extract organisms from aquatic Extract organisms from aquatic
environment environment
Management opportunities are limited Management actions can act on all
Management via the act of fishing: production processes
o Fishing area Process control can relate to the organisms
o Fishing period and to the production environment
o Fishing method Recruitment and growth is controlled
Recruitment, growth and natural mortality mortality result of stress and diseases
are dependent on natural conditions stocks are owned
Production control is organized via
management of the fisheries
Stocks are common property
Water quality management is an important discipline in aquaculture, there is a distinction between
the reproduction and larval rearing phase and the grow-out phase.
what makes aquaculture special?
- Cold blooded (poikilothermic) animals
- Difficulty in using carbohydrates. The principal energy source is fat (lipids)
- Gas exchange through gills or cutaneous (skin) diffusion
- Many different modes of reproduction (f.ex in fishes, hermaphroditism is quite common)
- Many, especially invertebrate animals derive structure from calcareous material (corals,
foraminifers, shellfish).
The role of FISH to mankind
Fisheries: aquaculture and capture fisheries
Capture fisheries: capture/harvest of aquatic organisms (from seaweed to fish) from their
natural environment.
Stocks are common property
Aquaculture: the cultivation of aquatic organisms, from algae to fish.
Cultivation under controlled conditions.
Stocks are owned
Mariculture: aquaculture in a marine environment
Marine biotechnology: the extraction of fine chemicals or pharmacological products from marine
organisms.
Aquatic production: increase of biomass in time.
Recruitment natural mortality
Growth Harvest
Biomass
Capture fish VS aquaculture
CAPTURE FISHERIES AQUACULTURE
Extract organisms from aquatic Extract organisms from aquatic
environment environment
Management opportunities are limited Management actions can act on all
Management via the act of fishing: production processes
o Fishing area Process control can relate to the organisms
o Fishing period and to the production environment
o Fishing method Recruitment and growth is controlled
Recruitment, growth and natural mortality mortality result of stress and diseases
are dependent on natural conditions stocks are owned
Production control is organized via
management of the fisheries
Stocks are common property
Water quality management is an important discipline in aquaculture, there is a distinction between
the reproduction and larval rearing phase and the grow-out phase.
what makes aquaculture special?
- Cold blooded (poikilothermic) animals
- Difficulty in using carbohydrates. The principal energy source is fat (lipids)
- Gas exchange through gills or cutaneous (skin) diffusion
- Many different modes of reproduction (f.ex in fishes, hermaphroditism is quite common)
- Many, especially invertebrate animals derive structure from calcareous material (corals,
foraminifers, shellfish).
The role of FISH to mankind
