Returns the diet matrix with one row for each predator species and one column for each prey species and other ecosystem components. The entries give the rate at which biomass flows from the prey species to the predator species.
Value
A matrix with dimnames predator and prey containing the rates of
biomass flow from a prey species to a predator species (or that part of
the predator species population that is larger than min_w_pred).
Details
Note that the diet matrix has the absolute rates of biomass flow, not the proportions of the diet.
If min_w_pred or max_w_pred are set, then the diet matrix only represents
the flow of biomass into the part of the predator species population that has
sizes in the specified range. This may make the returned diet matrix
correspond more closely to diet matrices found in the literature, which are
often estimated from observation of large individuals only or of juveniles
only.
See also
Other rate functions:
getConsumption(),
getEcotrophicEfficiency(),
getGonadicProduction(),
getM0B(),
getM2B(),
getMetabolicRespiration(),
getOffspringProduction(),
getProduction(),
getReproductiveLoss(),
getRespiration(),
getSomaticProduction(),
getTotalProduction(),
getUnassimilated(),
getZB()
Examples
dimnames(getDietMatrix(NS_params))
#> $predator
#> [1] "Sprat" "Sandeel" "N.pout" "Herring" "Dab" "Whiting" "Sole"
#> [8] "Gurnard" "Plaice" "Haddock" "Cod" "Saithe"
#>
#> $prey
#> [1] "Sprat" "Sandeel" "N.pout" "Herring" "Dab" "Whiting"
#> [7] "Sole" "Gurnard" "Plaice" "Haddock" "Cod" "Saithe"
#> [13] "Resource" "External"
#>
getDietMatrix(NS_params)["Cod", ]
#> Sprat Sandeel N.pout Herring Dab Whiting
#> 86473748535 442566895283 99626958953 586832187946 3872120553 77030953225
#> Sole Gurnard Plaice Haddock Cod Saithe
#> 36566692606 12479780619 338341387564 146059546289 53972800684 39772246157
#> Resource External
#> 107418940729 0