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Lengths for Yellow Perch from two locations in Saginaw Bay, Lake Michigan.

Source: R/YPerchSB1.R
YPerchSB1.Rd

Length measurements for Yellow Perch (Perca flavescens) from two locations -- inner and outer bay -- in Saginaw Bay, Lake Michigan.

Format

A data frame with 2074 observations on the following 2 variables:

tl

Measured total length (cm).

loc

Location of capture (inner or outer).

Source

Simulated (uniform distribution of values within length bin) from summarized length frequencies in Figure 2 (top) in Diana, J.S. and R. Salz. 1990. Energy storage, growth, and maturation of yellow perch from different locations in Saginaw Bay, Michigan. Transactions of the American Fisheries Society 119:976-984. CSV file

Topic(s)

  • Length Frequency

  • Size Structure

  • PSD

Examples

data(YPerchSB1)
str(YPerchSB1)
#> 'data.frame':	2074 obs. of  2 variables:
#>  $ tl : num  7.4 5.4 6.7 6 7.5 6.6 6.8 6.1 6.1 7.4 ...
#>  $ loc: Factor w/ 2 levels "inner","outer": 1 1 1 1 1 1 1 1 1 1 ...
head(YPerchSB1)
#>    tl   loc
#> 1 7.4 inner
#> 2 5.4 inner
#> 3 6.7 inner
#> 4 6.0 inner
#> 5 7.5 inner
#> 6 6.6 inner
op <- par(mfrow=c(1,2),pch=19)
with(subset(YPerchSB1,loc=="inner"),hist(tl,main="Inner"))
with(subset(YPerchSB1,loc=="outer"),hist(tl,main="Outer"))

par(op)