Skip to contents

Age and length of spot.

Source: R/SpotVA1.R
SpotVA1.Rd

Ages (from otoliths) and lengths of Virginia Spot (Leiostomus xanthurus).

Format

A data frame of 403 observations on the following 2 variables:

tl

Measured total lengths (in inches)

age

Ages assigned from examination of otoliths

Source

Extracted from Table 1 in Chapter 8 (Spot) of the VMRC Final Report on Finfish Ageing, 2002 by the Center for Quantitative Fisheries Ecology at Old Dominion University. CSV file

Details

Final length measurements were simulated by adding a uniform error to the value at the beginning of the length category.

Topic(s)

  • Growth

  • von Bertalanffy

See also

Used in vbFuns, vbStarts, and nlsTracePlot examples. Also see SpotVA2 in FSAdata for related data.

Examples

str(SpotVA1)
#> 'data.frame':	403 obs. of  2 variables:
#>  $ tl : num  6.5 6.3 7.4 7.1 7.7 7.1 7.9 7.3 7.5 7.3 ...
#>  $ age: int  0 0 0 0 0 0 0 0 0 0 ...
head(SpotVA1)
#>    tl age
#> 1 6.5   0
#> 2 6.3   0
#> 3 7.4   0
#> 4 7.1   0
#> 5 7.7   0
#> 6 7.1   0
plot(tl~age,data=SpotVA1)