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

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.

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

Note

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

Topic(s)

• Mortality

• Catch curve

Examples

data(WhitefishGSL)
str(WhitefishGSL)
#> 'data.frame':	16 obs. of  6 variables:
#>  $ age    : int  5 6 7 8 9 10 11 12 13 14 ...
#>  $ area.IE: int  NA 6 26 64 222 269 151 91 28 10 ...
#>  $ area.II: int  NA 15 37 123 345 220 90 39 14 1 ...
#>  $ area.IV: int  NA 3 18 46 173 193 231 80 26 7 ...
#>  $ area.V : int  NA NA 5 26 117 219 250 156 59 23 ...
#>  $ area.IW: int  1 4 36 142 193 116 78 44 22 28 ...
head(WhitefishGSL)
#>   age area.IE area.II area.IV area.V area.IW
#> 1   5      NA      NA      NA     NA       1
#> 2   6       6      15       3     NA       4
#> 3   7      26      37      18      5      36
#> 4   8      64     123      46     26     142
#> 5   9     222     345     173    117     193
#> 6  10     269     220     193    219     116
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
if (FALSE) {
library(reshape)
WhitefishGSL1 <- melt(WhitefishGSL,id.vars="age")
names(WhitefishGSL1) <- c("age","area","number")
}