Ages of commercially caught Georges Bank Yellowtail Flounder (Limanda ferruginea) as determined by scales, whole otoliths, or otolith cross-sections.
Format
A data frame with 27 paired observations on the following 3 variables.
- scale
Ages assigned from scales
- whole
Ages assigned from whole otoliths
- cross
Ages assigned from cross-sections of otoliths
Source
From tables in Annex 3 of Walsh, S.J. and J. Burnett. 2002. The Canada-United States yellowtail flounder age reading workshop: 28-30 November 2000, St. John's, Newfoundland. North Atlantic Fisheries Organization. Scientific Council Studies 35:1-59. CSV file
Examples
data(YTFlounder)
str(YTFlounder)
#> 'data.frame': 27 obs. of 3 variables:
#> $ scale: int 2 2 2 2 2 2 2 2 3 3 ...
#> $ whole: int 2 2 2 2 2 2 2 2 3 3 ...
#> $ cross: int 2 2 2 2 2 2 2 3 3 3 ...
head(YTFlounder)
#> scale whole cross
#> 1 2 2 2
#> 2 2 2 2
#> 3 2 2 2
#> 4 2 2 2
#> 5 2 2 2
#> 6 2 2 2
op <- par(mfrow=c(2,2),pch=19)
plot(scale~whole,data=YTFlounder)
plot(scale~cross,data=YTFlounder)
plot(whole~cross,data=YTFlounder)
par(op)
