Lengths and weights of Yellow Perch from Grafton Lake (ME) by year.

Yellow Perch (Perca flavescens) fork lengths and weights separated by year.

Format

A data frame with 100 observations on the following 3 variables:

fl: Fork Length (nearest mm) at capture
w: Weight (nearest 0.1 g) at capture
year: Year of capture (1994 or 2000)

Source

From (approximately) Figure 3 in Brylinsky, M. 2001. An evaluation of changes in the yellow perch (Perca flavescens) population of Grafton Lake, Kejimkujik National Park, after dam removal. Technical Report Publication No. 59, Acadia Centre for Estuarine Research. CSV file

Topic(s)

Weight-Length
Length Frequency

Examples

data(YPerchGL)
str(YPerchGL)
#> 'data.frame':	100 obs. of  3 variables:
#>  $ fl  : int  59 60 63 63 66 69 72 74 78 78 ...
#>  $ w   : num  2.5 2.5 3.3 3.6 3.9 4.1 4.4 4.8 5 5.6 ...
#>  $ year: int  1994 1994 1994 1994 1994 1994 1994 1994 1994 1994 ...
head(YPerchGL)
#>   fl   w year
#> 1 59 2.5 1994
#> 2 60 2.5 1994
#> 3 63 3.3 1994
#> 4 63 3.6 1994
#> 5 66 3.9 1994
#> 6 69 4.1 1994
op <- par(mfrow=c(1,2),pch=19)
plot(w~fl,data=YPerchGL,subset=year==1994,main="1994")
plot(w~fl,data=YPerchGL,subset=year==2000,main="2000")

par(op)