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Growth increment data for Red Lakes Walleye.

Source: R/WalleyeRL.R
WalleyeRL.Rd

Growth increment data for Red Lakes Walleye (Sander vitreus) in one-fish-per-line format.

Format

A data frame with 1543 observations on the following 13 variables.

fish

A fish identification number. Unique within a year but not across years.

yearcap

Year the fish was captured.

ce

A factor denoting capture gear (C=commercial and E=experimental nets).

agecap

Age of fish at capture.

lencap

Length of fish at capture.

inc1

Scale measurement to first annulus.

inc2

Scale measurement between first and second annulus.

inc3

Scale measurement between second and third annulus.

inc4

Scale measurement between third and fourth annulus.

inc5

Scale measurement between fourth and fifth annulus.

inc6

Scale measurement between fifth and sixth annulus.

inc7

Scale measurement between sixth and seventh annulus.

radcap

Scale radius at time of capture

Source

Cyterski, M.J. and G.R. Spangler. 1996. A tool for age determination. North American Journal of Fisheries Management 16:403-412. CSV file

Note

Data is in one-fish-per-line format.

Topic(s)

  • Growth increment analysis

  • Weisberg linear growth model

Examples

data(WalleyeRL)
str(WalleyeRL)
#> 'data.frame':	1543 obs. of  13 variables:
#>  $ fish   : int  1179 681 691 692 693 702 704 705 649 650 ...
#>  $ yearcap: int  1961 1979 1979 1979 1979 1979 1979 1979 1980 1980 ...
#>  $ ce     : Factor w/ 2 levels "C","E": 1 2 2 2 2 2 2 2 2 2 ...
#>  $ agecap : int  1 1 1 1 1 1 1 1 1 1 ...
#>  $ lencap : int  236 216 188 198 216 211 178 170 193 193 ...
#>  $ inc1   : num  1.357 0.699 0.852 0.966 1.26 ...
#>  $ inc2   : num  0.993 0.563 0.647 0.72 0.833 ...
#>  $ inc3   : num  NA NA NA NA NA NA NA NA NA NA ...
#>  $ inc4   : num  NA NA NA NA NA NA NA NA NA NA ...
#>  $ inc5   : num  NA NA NA NA NA NA NA NA NA NA ...
#>  $ inc6   : num  NA NA NA NA NA NA NA NA NA NA ...
#>  $ inc7   : num  NA NA NA NA NA NA NA NA NA NA ...
#>  $ radcap : num  2.35 1.26 1.5 1.69 2.09 ...
head(WalleyeRL)
#>   fish yearcap ce agecap lencap   inc1   inc2 inc3 inc4 inc5 inc6 inc7 radcap
#> 1 1179    1961  C      1    236 1.3568 0.9926   NA   NA   NA   NA   NA 2.3494
#> 2  681    1979  E      1    216 0.6986 0.5630   NA   NA   NA   NA   NA 1.2616
#> 3  691    1979  E      1    188 0.8515 0.6467   NA   NA   NA   NA   NA 1.4982
#> 4  692    1979  E      1    198 0.9659 0.7202   NA   NA   NA   NA   NA 1.6861
#> 5  693    1979  E      1    216 1.2599 0.8333   NA   NA   NA   NA   NA 2.0932
#> 6  702    1979  E      1    211 0.8349 0.5005   NA   NA   NA   NA   NA 1.3354