Casselman1990: Instantaneous growth rates for two calcified ageing...

Casselman1990R Documentation

Instantaneous growth rates for two calcified ageing structures.

Description

Instantaneous growth rates (percent change per day) for body growth and two calcified ageing structures from age 1-4 female Northern Pike (Esox lucius) from Wickett Lake, Ontario.

Format

A data frame with 12 observations on the following 4 variables.

day

A numeric vector of days since the beginning of the study.

body

A numeric vector of instantaneous growth rates (percent change per day) for body growth.

cleithrum

A numeric vector of instantaneous growth rates (percent change per day) for cleithra.

scale

A numeric vector of instantaneous growth rates (percent change per day) for scales.

Topic(s)

  • Other

Source

From Figure 8 of Casselman, J.M. 1990. Growth and relative size of calcified structures of fish. Transactions of the American Fisheries Society. 119:673-688.

Examples

data(Casselman1990)

# recreation of Casselman's (199) Figure 8.
p <- c(19,17,15); clr <- c("black","red","blue"); l <- 1
with(Casselman1990,
     matplot(day,cbind(body,cleithrum,scale),type="b",lwd=2,pch=p,col=clr,lty=l,
             ylab="Instantaneous Growth Rate",xaxt="n",xlab="")
)
axis(1,at=c(0,31,60,91,121,152,182,213,243,274,304,335,365),tick=TRUE,labels=FALSE)
axis(1,at=c(15,46,76,107,137,168,198,229,260,291,321,352),tick=FALSE,
     labels=c("Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"))
legend("topleft",legend=c("Body","Cleithrum","Scale"),pch=p,col=clr,lty=l,lwd=2)


FSAdata documentation built on March 18, 2022, 5:19 p.m.