Use Migration Rate m when you need to compute the migration rate m = migrants per generation / effective population size. Enter Migrants per generation and Effective population size Ne using the definitions and units below so the result can be reproduced.

Migrants per generation

A finite measured or assumed value greater than or equal to 0.

Effective population size Ne

An integer count or setting greater than or equal to 1.

The published tool contract uses this rule: Compute the migration rate m = migrants per generation / effective population size.

Migration rate m

The calculated migration rate m.

A ratio or percentage can conceal the scale of its numerator and denominator and becomes sensitive to measurement error when the denominator is small.

Retain the original Migrants per generation and Effective population size Ne values and their units alongside the result. Mutation Rate is useful when you instead need to compute the mutation rate per generation as new mutations / (population size x generations). Kleiber BMR provides another view by helping you estimate basal metabolic rate across animals with Kleiber's law: BMR = 70 x bodyMass^0.75 kilocalories per day.

• Mutation Rate

  Compute the mutation rate per generation as new mutations / (population size x generations).

• Kleiber BMR

  Estimate basal metabolic rate across animals with Kleiber's law: BMR = 70 x bodyMass^0.75 kilocalories per day.

• BrdU Incorporation Rate

  Compute the percentage of BrdU positive cells relative to the total counted cell population.