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Stock and recruitment data for Walleye from Escanaba Lake, WI, 1958-1992.

Source: R/WalleyeEL.R
WalleyeEL.Rd

Abundance of age-0 and age-5 and older Walleye (Sander vitreus), abundance of adult Yellow Perch (Perca flavescens), and coefficient of variation of May temperatures for Escanaba Lake, WI, 1958-1992.

Format

A data frame of 39 observations on the following 5 variables:

yrclass

Year-class of the data

age0

Abundance of age-0 Walleye (recruits)

age5

Abundance of age-5 and older Walleye (stock)

maycv

Coefficient of variation of May temperatures in birth year

yep

Abundance of adult (larger than 152.4 mm) Yellow Perch

Source

Hansen, M. J., M. A. Bozek, J. R. Newby, S. P. Newman, and M. D. Staggs. 1998. Factors affecting recruitment of walleyes in Escanaba Lake, Wisconsin, 1958-1995. North American Journal of Fisheries Management 18:764-774. CSV file

Topic(s)

  • Stock-Recruit

  • Recruitment

Examples

data(WalleyeEL)
str(WalleyeEL)
#> 'data.frame':	39 obs. of  5 variables:
#>  $ yrclass: int  1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 ...
#>  $ age0   : int  4532 22996 628 879 14747 13205 31793 10621 22271 8736 ...
#>  $ age5   : int  775 2310 2990 1400 1130 790 1195 981 870 1104 ...
#>  $ maycv  : num  0.241 0.163 0.461 0.33 0.226 ...
#>  $ yep    : int  66000 34000 35000 54000 68000 37000 29000 11000 6000 NA ...
head(WalleyeEL)
#>   yrclass  age0 age5   maycv   yep
#> 1    1958  4532  775 0.24125 66000
#> 2    1959 22996 2310 0.16319 34000
#> 3    1960   628 2990 0.46056 35000
#> 4    1961   879 1400 0.33028 54000
#> 5    1962 14747 1130 0.22618 68000
#> 6    1963 13205  790 0.20596 37000
op <- par(mfrow=c(1,2),pch=19)
plot(age0~yrclass,data=WalleyeEL,type="l")
plot(age0~age5,data=WalleyeEL)

par(op)