ViewSelec: View Midwater Trawl Selectivity Curves

In JVAdams/artiFISHal: A Pelagic Fish Community Simulator

Description

Visualization of midwater trawl selectivity curves based on parameters used in AcMtEst.

Usage

ViewSelec(SelecParam)

Arguments

SelecParam

A data frame with 6 columns in which each row provides the midwater trawl selectivity parameters for a given fish group and mesh panel zone. All columns must be completely filled in (no missing values). Selectivity is assumed to be 100% for any group-zone combination not represented as a row in the data frame. For 100% selectivity of small fish, use MtL50Small = -Inf and any slope. For 100% selectivity of large fish, use MtL50Large = Inf and any slope. Column names and descriptions: G = character, a one-letter nickname for the group (e.g., fish species and life stage) used in plotting Zone = character, mesh panel zone, one of "mouth", "middle", "aft", or "cod" MtL50Small = the length (in mm) at which small fish have a 50% probability of being captured by the trawl MtSlopeSmall = the (inverse) slope at which small fish probability of capture increases with length, smaller values are steeper MtL50Large = the length (in mm) at which large fish have a 50% probability of being captured by the trawl MtSlopeLarge = the (absolute value of the inverse) slope at which large fish probability of capture decreases with length, smaller values are steeper

See Also

AcMtEst, logit2

Examples

## Not run: 

selec <- data.frame(
  G = c("A", "a", "A", "a", "A", "a"),
  Zone = c("mouth", "mouth", "middle", "middle", "aft", "aft"),
  MtL50Small = c(100, 90, 60, 50, 30, 2),
  MtSlopeSmall = c(40, 40, 30, 30, 20, 20),
  MtL50Large = c(180, 180, Inf, Inf, Inf, Inf),
  MtSlopeLarge = c(20, 20, 100, 100, 100, 100)
)
ViewSelec(selec)

## End(Not run)

JVAdams/artiFISHal documentation built on May 7, 2019, 10:14 a.m.