RuffeSLRH92 {FSAdata}

Biological data for Ruffe captured from the St. Louis River in 1992.

Description

Biological data for Ruffe (Gymnocephalus cernuus) captured in the St. Louis River, Lake Superior in 1992.

Format

A data frame of 738 observations on the following 11 variables:

fish.id

A unique fish identification number (across all years, most of which are not shown in this file

month

Month (numeric) of capture

day

Day of capture

year

Year of capture

indiv

A unique fish identification number within the year

location

Grid location of capture

length

Total length (mm)

weight

Weight (g)

sex

Sex factor (female, male, or unknown)

maturity

Maturity stage factor (developing, immature, mature, nearly.ripe, nearly.spent, recovering, ripe, running, spent, unknown, or yoy)

age

Age (yrs) from scales

Topic(s)

• Length Frequency

• Weight-Length

• Growth

• von Bertalanffy

• Maturity

Source

personal collection by the United States Geological Survey, Lake Superior Biological Station, Ashland, WI. CSV file

Examples

data(RuffeSLRH92)
str(RuffeSLRH92)
head(RuffeSLRH92)
op <- par(mfrow=c(2,2),pch=19)
hist(RuffeSLRH92$length,main="")
hist(RuffeSLRH92$age,main="")
plot(weight~length,data=RuffeSLRH92)
plot(length~age,data=RuffeSLRH92)
par(op)
xtabs(~age,data=RuffeSLRH92)
xtabs(~sex,data=RuffeSLRH92)
tmp <- c("yoy","immature","developing","mature","nearly.ripe","ripe",
         "running","nearly.spent","spent","recovering","unknown")
RuffeSLRH92$maturity <- ordered(RuffeSLRH92$maturity,levels=tmp)
xtabs(~maturity,data=RuffeSLRH92)
xtabs(~maturity+month+sex,data=RuffeSLRH92)