A predation kernel where the predator/prey mass ratio is uniformly distributed on an interval.

box_pred_kernel(ppmr, ppmr_min, ppmr_max)

ppmr | A vector of predator/prey size ratios |
---|---|

ppmr_min | Minimum predator/prey mass ratio |

ppmr_max | Maximum predator/prey mass ratio |

A vector giving the value of the predation kernel at each of the
predator/prey mass ratios in the `ppmr`

argument.

Writing the predator mass as \(w\) and the prey mass as \(w_p\), the
feeding kernel is 1 if \(w/w_p\) is between `ppmr_min`

and
`ppmr_max`

and zero otherwise. The parameters need to be given in the
species parameter dataframe in the columns `ppmr_min`

and
`ppmr_max`

.