moulting: Carapace Moult Status

In TobieSurette/gulf.data: Southern Gulf of St Lawrence Data Access

Carapace Moult Status

Description

Determines the carapace moult or hardness status.

Usage

is.new.shell(x, ...)

## S3 method for class 'scsbio'
is.new.shell(x)

is.hard.shell(x, ...)

## S3 method for class 'scsbio'
is.hard.shell(x, durometer, shell.condition, zone, ...)

## S3 method for class 'scobs'
is.hard.shell(x, durometer, shell.condition, zone, ...)

is.soft.shell(x, ...)

is.skip.moulter(x, ...)

## S3 method for class 'scsbio'
is.skip.moulter(x, ...)

Arguments

x

Object.

Value

Logical vector.

Functions

is.new.shell

Generic is.new.shell method.

is.new.shell.scsbio

Returns whether a crab is newly-moulted based on snow crab survey data.

is.hard.shell

Generic is.hard.shell method.

is.hard.shell.scsbio

Returns whether a carapace is considered hard based on snow crab survey data.

is.hard.shell.scobs

Returns whether a carapace is considered hard based on snow crab observer data.

is.soft.shell

Returns whether a crustacean carapace is considered soft.

is.skip.moulter

Generic is.skip.moulter method.

is.skip.moulter.scsbio

Returns whether a crustacean is considered to have skipped a moult, based on snow crab survey data.

Examples

# Read 2020 crab data:
x <- read.scsbio(2020)
index <- is.new.shell(x)    # Newly moulted crab.
index <- is.soft.shell(x)   # Soft-shelled crab.
index <- is.skip.moulter(x) # Skip-moulters.

TobieSurette/gulf.data documentation built on Jan. 19, 2025, 7:50 p.m.