Fish Hatchery Management Calculators

Do the math…

When the American Fisheries Society published “Fish Hatchery Management, 2nd Edition”, they made a series of companion calculators available online. Use these calculators to quickly determine length-weight relationships, unionized ammonia concentrations, and many other figures needed for day-to-day management of fish culture operations.  

Click here or the links below to access the various calculators, and don’t forget to download our drug treatment calculator to complete your set of desktop number-crunching tools.

Table 1: Length-Weight Calculator (to compute length, weight, and condition factor)

Table 2: Length-Weight Table (generates a table of length-weights relations for a specific species)

Table 3: Dissolved Oxygen Spreadsheet (F) (to compute equilibrium concentration of dissolved oxygen as a function of elevation [pressure], temperature [Fahrenheit], and salinity)

Table 4: Dissolved Oxygen Spreadsheet (C) (to compute equilibrium concentration of dissolved oxygen as a function of elevation [pressure], temperature [Celsius], and salinity)

Table 5: Gas Supersaturation Calculator (to compute the values of partial pressures for oxygen and nitrogen + argon, total gas pressure, percent saturation oxygen, percent saturation nitrogen + argon, and the nitrogen/oxygen ratio)

Table 6: Partial Pressure Calculator (to compute the partial pressure of oxygen in mm Hg)

Table 7: Ammonia Table (Freshwater) (generates a table of the mole fraction of un-ionized ammonia as a function of temperature, pH, and ionic composition)

Table 8: Ammonia Table (Seawater) (generates a table of the mole fraction of un-ionized ammonia as a function of temperature, pH, and ionic composition)

Table 9: Ammonia Calculator (Freshwater) (computes the concentration of un-ionized ammonia as a function of temperature, pH, and salinity)

Table 10: Ammonia Calculator (Seawater) (computes the concentration of un-ionized ammonia as a function of temperature, pH, and salinity)

Table 11: Oxygen Calculator (to compute the partial pressure of oxygen from concentration units)