rcpp_fishpop_growth: rcpp_fishpop_growth

In Allgeier-Lab/arrR: Individual-Based Simulation Model of Artifical Reefs in R

rcpp_fishpop_growth

Description

Rcpp simulate fishpop growth.

Usage

rcpp_fishpop_growth(
  fishpop,
  fishpop_track,
  seafloor,
  pop_k,
  pop_linf,
  pop_a,
  pop_b,
  pop_n_body,
  pop_reserves_max,
  pop_reserves_consump,
  extent,
  dimensions,
  min_per_i
)

Arguments

fishpop, fishpop_track	Matrix with fishpop values and starting population.
seafloor	Matrix with seafloor values.
pop_k, pop_linf, pop_a, pop_b	Numeric with parameters.
pop_n_body, pop_reserves_max, min_per_i	Numeric with parameters.
pop_reserves_consump	Double with consumption limit to fill reserves each time step.
extent	Vector with extent (xmin,xmax,ymin,ymax).
dimensions	Vector with dimensions (nrow, ncol).

Details

Function to simulate consumption, mortality, growth and excretion of fish individuals.

Each fish individual has to follow the von Bertalanffy growth curve (Froese and Pauly 2019) and the corresponding amount of nutrients for this are calculated based on a bioenergetics model (Allgeier et al. 2020). The nutrients are consumed from the detritus pool. If the available amount is not big enough, fish can either use their reserves. If there are no reserves, individuals die. Last, if the detritus pool is big enough, individuals can additionally fill up their reserves.

If individuals are acting accordingly to movement state 1 or 2 (only for movement = 'behav'), the consumption requirement must be met by the reserves only.

If 0 < pop_reserves_consump < 1, only a ratio of the pop_reserves_max can be consumed each time step.

Value

void

References

Allgeier, J.E., Cline, T.J., Walsworth, T.E., Wathen, G., Layman, C.A., Schindler, D.E., 2020. Individual behavior drives ecosystem function and the impacts of harvest. Sci. Adv. 6, eaax8329. <https://doi.org/10.1126/sciadv.aax8329>

Froese, R., Pauly, D., 2019. FishBase. World Wide Web electronic publication [WWW Document]. <www.fishbase.org>

Allgeier-Lab/arrR documentation built on Feb. 13, 2025, 7:44 a.m.