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

Surviving Larvae (larvae)

Required number in larvae.

Initial Larvae (larvae)

Required number in larvae.

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

Measure larval survival over a specified observation interval. Inputs are interpreted exactly in the displayed units and the calculation returns the following fields without presentation rounding.

Larval 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.

• Survival Rate

  Measure the fraction of the initial stocked animals surviving to a census.

• Fertilization Rate

  Measure the share of assessed eggs that show fertilization.

• Hatching Rate

  Measure hatching success against the count of viable eggs, not all eggs laid.