FSAdata (version 0.3.3)

WalleyeEL: 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

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.

Topic(s)

• Stock-Recruit
• Recruitment

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)