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Assigned ages from two readers on three structures for Lake Whitefish from Lake Champlain.

Source: R/WhitefishLC.R
WhitefishLC.Rd

Assigned ages from two readers on three structures for Lake Whitefish (Coregonus clupeaformis) from Lake Champlain in 2009.

Format

A data frame with 151 observations on the following 11 variables:

fishID

A unique fish identification number

tl

Total length (in mm)

scale1

Assessed age from scales by first reader

scale2

Assessed age from scales by second reader

scaleC

Consensus age from scales by both reader

finray1

Assessed age from fin rays by first reader

finray2

Assessed age from fin rays by second reader

finrayC

Consensus age from fin rays by both reader

otolith1

Assessed age from otoliths by first reader

otolith2

Assessed age from otoliths by second reader

otolithC

Consensus age from otoliths by both reader

Source

Data from Herbst, S.J. and J.E. Marsden. 2011. Comparison of precision and bias of scale, fin ray, and otolith age estimates for lake whitefish (Coregonus clupeaformis) in Lake Champlain. Journal of Great Lakes Research. 37:386-389. Contributed by Seth Herbst. Do not use for other than educational purposes without permission from the author. CSV file

Topic(s)

  • Age

  • Ageing Error

  • Precision

  • Bias

  • Age Comparisons

See also

Used in ageBias and agePrecision examples.

Examples

str(WhitefishLC)
#> 'data.frame':	151 obs. of  11 variables:
#>  $ fishID  : int  1 2 3 4 5 6 7 8 9 10 ...
#>  $ tl      : int  345 334 348 300 330 316 508 475 340 173 ...
#>  $ scale1  : int  3 4 7 4 3 4 6 4 3 1 ...
#>  $ scale2  : int  3 3 5 3 3 4 7 5 3 1 ...
#>  $ scaleC  : int  3 4 6 4 3 4 7 5 3 1 ...
#>  $ finray1 : int  3 3 3 3 4 2 6 9 2 2 ...
#>  $ finray2 : int  3 3 3 2 3 3 6 9 3 1 ...
#>  $ finrayC : int  3 3 3 3 4 3 6 9 3 1 ...
#>  $ otolith1: int  3 3 3 3 3 6 9 11 3 1 ...
#>  $ otolith2: int  3 3 3 3 3 5 10 12 4 1 ...
#>  $ otolithC: int  3 3 3 3 3 6 10 11 4 1 ...
head(WhitefishLC)
#>   fishID  tl scale1 scale2 scaleC finray1 finray2 finrayC otolith1 otolith2
#> 1      1 345      3      3      3       3       3       3        3        3
#> 2      2 334      4      3      4       3       3       3        3        3
#> 3      3 348      7      5      6       3       3       3        3        3
#> 4      4 300      4      3      4       3       2       3        3        3
#> 5      5 330      3      3      3       4       3       4        3        3
#> 6      6 316      4      4      4       2       3       3        6        5
#>   otolithC
#> 1        3
#> 2        3
#> 3        3
#> 4        3
#> 5        3
#> 6        6