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
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