Midterm 1 Flashcards
Top aquaculture products in Canada
Salmon, mussels, oysters
Country where aquaculture began and first fish cultured
China, common carp
Species properties of water
Higher heat capacity, less oxygen, flow and dilution capacity, amount of water physiologically available
Water exchanges per day in open systems
10-100
Water exchanges per day in semi-closed systems
0.5-4
Water exchanges per day in closed systems
<0.5
Three fundamental parameters aquaculture systems must control
Temperature, oxygen, nitrogenous waste
Max degree change per hour
5
Dissolved oxygen is an inverse function of…
Water temperature (larger effect) and salinity
Biofilter O2 consumption can be up to __% of total
35
Conversion factor for ammonia nitrogen to ammonia
1.22
Ideal pH for most freshwater fish
6.5-9
Alkalinity
Sum of bases working to neutralize hydrogen ions when an acidic solution is added to the water
Hardness
Measure of divalent ions
Conductivity
Ability to conduct electricity, describes concentration of ions or salts
