Functions for estimating and updating fish body composition (water, protein, ash, fat) and energy density from total wet weight. Composition is estimated via the allometric regressions of Breck (2014):
$$\log_{10}(\text{Component}) = \alpha + \beta \cdot \log_{10}(H_2O)$$
Fat is obtained by subtraction and bounded to biologically plausible limits. Energy density is computed as a weighted sum of fat and protein energy contents (J/g).
Value
No return value; this page documents the body composition functions module. See individual function documentation for return values.
References
Breck, J.E. (2014). Body composition in fishes: body size matters. Aquaculture, 433, 40–49. doi:10.1016/j.aquaculture.2014.05.049