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)

Arguments

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

Value

The value returned is the number of days represented by the cut segment.

References

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.

Author

The function was written by Gary Truong with collaboration from Ben Walker and Anna Lewis from the University of New South Wales

Examples

TP1(L = 100, L.asym = 150, LP1 = 90, k = 0.0126)
#> [1] 13.2