TP1.Rd
TP1
allows you calculate how much time is represented by a section of sampled tissue.
It uses the discrete step by step von Bertanlanffy equation solved for time
TP1(L, L.asym, LP1, k)
L | numeric; length of the sample |
---|---|
L.asym | numeric; asymptotic length |
LP1 | numeric; length of the sample minus the cut sampled segment |
k | numeric; growth coefficient, calculate using the function k |
The value returned is the number of days represented by the cut segment.
Hall-Aspland, S. A., Rogers, T. L., & Canfield, R. B. (2005). Stable carbon and nitrogen isotope analysis reveals seasonal variation in the diet of leopard seals. Marine Ecology Progress Series, 305, 249-259.
The function was written by Gary Truong with collaboration from Ben Walker and Anna Lewis from the University of New South Wales
TP1(L = 100, L.asym = 150, LP1 = 90, k = 0.0126)#> [1] 13.2