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.

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)