agr: Absolute Growth Rate (AGR)

In aquacultuR: A Comprehensive R Tool for Zootechnical Metrics

Absolute Growth Rate (AGR)

Description

A function that calculates the Absolute Growth Rate (AGR), also denoted as Weight Gain (WG) when applied to weight data.

Usage

agr(ibw, fbw, duration)

Arguments

ibw	numeric; value that is providing the initial body weight in grams.
fbw	numeric; value that is providing the final body weight in grams.
duration	numeric value that is providing the duration of the experiment in days.

Value

returns a numeric value which is the total body weight change over the specified period of time.

Author(s)

Anıl Axel Tellbüscher

Madhav Karthikeyan

Davide A. Machado e Silva

References

Lugert, V., Thaller, G., Tetens, J., Schulz, C., & Krieter, J. (2016): A review on fish growth calculation: multiple functions in fish production and their specific application. Reviews in Aquaculture, 8, p.30–42.

Hopkins K.D. (1992) Reporting fish growth, a review of the basics. Journal of World Aquaculture Society, 23, p.173-179

Examples

data(weight2)
dplyr::mutate(weight2, AGR = agr(ibw_g, fbw_g, duration = 84))

aquacultuR documentation built on Jan. 26, 2026, 5:07 p.m.