FSAdata (version 0.3.0)

WalleyePS: Ages of Walleye assigned from otoliths, scales, and spines.

Description

Age of Pymatuning Sanctuary (PA) Walleye (Sander vitreus) assessed from three calcified structures -- sectioned otoliths, sectioned dorsal spines, and scale impressions.

source

Extracted from Figure 2 in Kocovsky, P.M., and R.M. Carline. 2000. A comparison of methods for estimating ages of unexploited walleyes. North American Journal of Fisheries Management 20:1044-1048.

Topic(s)

• Age comparison
• Age precision
• Age Bias
• Ageing error

concept

Age Precision Bias 'Age Comparison'

Examples

data(WalleyePS)
str(WalleyePS)
head(WalleyePS)
op <- par(mfrow=c(3,2),pch=19)
plot(scale~otolith,data=WalleyePS,subset=sex=="female",main="Female")
plot(scale~otolith,data=WalleyePS,subset=sex=="male",main="Male")
plot(scale~spine,data=WalleyePS,subset=sex=="female",main="Female")
plot(scale~spine,data=WalleyePS,subset=sex=="male",main="Male")
plot(spine~otolith,data=WalleyePS,subset=sex=="female",main="Female")
plot(spine~otolith,data=WalleyePS,subset=sex=="male",main="Male")
par(op)