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

Description

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

Topic(s)

• Stock-Recruit
• Recruitment

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.

Examples

data(WalleyeEL)
str(WalleyeEL)
head(WalleyeEL)
op <- par(mfrow=c(1,2),pch=19)
plot(age0~yrclass,data=WalleyeEL,type="l")
plot(age0~age5,data=WalleyeEL)
par(op)