WhitefishGSL: Catch-at-age of Great Slave Lake Whitefish (commercial) by...
In FSAdata: Data to Support Fish Stock Assessment ('FSA') Package

WhitefishGSL

R Documentation

Catch-at-age of Great Slave Lake Whitefish (commercial) by area.

Description

Age composition of commercial Whitefish (Coregonus clupeaformis) catches for five areas of Great Slave Lake.

Format

A data frame with 16 observations on the following 6 variables:

age: Assigned ages.
area.IE: Catches for area IE.
area.II: Catches for area II.
area.IV: Catches for area IV.
area.V: Catches for area V.
area.IW: Catches for area IW.

Topic(s)

Mortality
Catch curve

Note

All data are from summer samples except for Area.IW which is a winter sample

Source

From Table 19 of Mosenko, R.W., and G. Low. 1980. Data from the commercial fishery for lake whitefish Coregonus clupeaformis (Mitchill), on Great Slave Lake, Northwest Territories, 1979. Canadian Data Report of Fisheries And Aquatic Sciences, No. 194. CSV file

Examples

data(WhitefishGSL)
str(WhitefishGSL)
head(WhitefishGSL)
op <- par(mfrow=c(3,2),pch=19)
plot(log(area.IE)~age,data=WhitefishGSL)
plot(log(area.II)~age,data=WhitefishGSL)
plot(log(area.IV)~age,data=WhitefishGSL)
plot(log(area.V)~age,data=WhitefishGSL)
plot(log(area.IW)~age,data=WhitefishGSL)
par(op)

# can be reshaped to 'long' format with
## Not run: 
library(reshape)
WhitefishGSL1 <- melt(WhitefishGSL,id.vars="age")
names(WhitefishGSL1) <- c("age","area","number")

## End(Not run)

FSAdata documentation built on Aug. 24, 2023, 5:06 p.m.