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Ages of St. Lawrence River, ONT, Muskellunge (Esox masquinongy) assessed from scales and cleithra.

Format

A data frame of 43 observations on the following 2 variables:

ageC

Age assigned from examinaton of cleithrum

ageS

Age assigned from examination of scales

Source

From Figure 3 in Casselman,J.M. 1983. Age and growth assessment of fish from their calcified structures - techniques and tools. In E.D. Prince and L.M. Pulos, editors, Proceedings of the international workshop on age determination of oceanic pelagic fishes: Tunas, billfishes, and sharks, volume NOAA Technical Report, NMFS 8:1-17. CSV file

Topic(s)

  • Age Comparison

  • Age Precision

  • Age Bias

  • Ageing Error

Examples

data(MuskieSLR)
str(MuskieSLR)
#> 'data.frame':	43 obs. of  2 variables:
#>  $ ageC: int  1 1 1 1 1 1 1 1 1 1 ...
#>  $ ageS: int  1 1 1 1 1 1 1 1 1 1 ...
head(MuskieSLR)
#>   ageC ageS
#> 1    1    1
#> 2    1    1
#> 3    1    1
#> 4    1    1
#> 5    1    1
#> 6    1    1
plot(ageS~ageC,data=MuskieSLR)

xtabs(~ageC+ageS,data=MuskieSLR)
#>     ageS
#> ageC  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17
#>   1  10  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0
#>   2   0  4  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0
#>   3   0  0  3  0  0  0  0  0  0  0  0  0  0  0  0  0  0
#>   4   0  0  0  1  0  0  0  0  0  0  0  0  0  0  0  0  0
#>   5   0  0  0  0  3  0  0  0  0  0  0  0  0  0  0  0  0
#>   6   0  0  0  0  0  1  0  0  0  0  0  0  0  0  0  0  0
#>   7   0  0  0  0  0  0  1  0  0  0  0  0  0  0  0  0  0
#>   8   0  0  0  0  0  0  0  2  0  0  0  0  0  0  0  0  0
#>   9   0  0  0  0  0  0  0  0  1  0  0  0  0  0  0  0  0
#>   10  0  0  0  0  0  0  0  0  0  1  0  0  0  0  0  0  0
#>   11  0  0  0  0  0  0  0  0  0  1  1  0  0  0  0  0  0
#>   13  0  0  0  0  0  0  0  0  0  0  0  1  0  0  0  0  0
#>   14  0  0  0  0  0  0  0  0  0  0  0  0  1  0  0  0  0
#>   15  0  0  0  0  0  0  0  0  0  0  0  0  1  0  1  0  0
#>   16  0  0  0  0  0  0  0  0  0  0  1  0  0  1  0  0  0
#>   19  0  0  0  0  0  0  0  0  0  0  0  0  0  0  1  0  0
#>   21  0  0  0  0  0  0  0  0  0  0  0  0  0  0  1  2  0
#>   22  0  0  0  0  0  0  0  0  0  0  0  0  0  1  1  0  0
#>   24  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  1  1