Use this calculation to compare aquaculture production, feeding, growth, water-quality, or hatchery measurements collected with the same definitions and units.

Surviving Animals (animals)

Required number in animals.

Initial Animals (animals)

Required number in animals.

The cited overview of Aquaculture supplies background for the terminology and domain context used by this tool.^[1]

Measure the fraction of the initial stocked animals surviving to a census. Inputs are interpreted exactly in the displayed units and the calculation returns the following fields without presentation rounding.

Survival Percent (%)

Returned number in %.

• Species, life stage, temperature, salinity, system design, sampling method, and management practice can materially change aquaculture measurements and suitable operating ranges.
• Use finite inputs in the displayed units, preserve source measurements and assumptions, and independently verify consequential decisions.

Complement the calculation with calibrated water-quality instruments, representative sampling, feed and mortality records, and species-specific guidance from qualified aquatic-health or production professionals.

• Larval Survival Rate

  Measure larval survival over a specified observation interval.

• Mortality Rate

  Measure recorded deaths as a share of initial stock, excluding unobserved losses.

• BOD Aquaculture

  Compute oxygen demand from initial and final dissolved oxygen with the dilution fraction; incubation duration and controls must be specified externally.