WhitefishLC: Assigned ages from two readers on three structures for Lake Whitefish from Lake Champlain.

Description

Assigned ages from two readers on three structures for Lake Whitefish (Coregonus clupeaformis) from Lake Champlain in 2009.

Arguments

Format

A data frame with 151 observations on the following 11 variables:

fishID: A unique fish identification number
tl: Total length (in mm)
scale1: Assessed age from scales by first reader
scale2: Assessed age from scales by second reader
scaleC: Consensus age from scales by both reader
finray1: Assessed age from fin rays by first reader
finray2: Assessed age from fin rays by second reader
finrayC: Consensus age from fin rays by both reader
otolith1: Assessed age from otoliths by first reader
otolith2: Assessed age from otoliths by second reader
otolithC: Consensus age from otoliths by both reader

Source

Data from Herbst, S.J. and J.E. Marsden. 2011. Comparison of precision and bias of scale, fin ray, and otolith age estimates for lake whitefish (Coregonus clupeaformis) in Lake Champlain. Journal of Great Lakes Research. 37:386-389. Contributed by Seth Herbst. Do not use for other than educational purposes without permission from the author. [Was (is?) from http://www.uvm.edu/rsenr/emarsden/documents/Herbst%20and%20Marsden%20whitefish%20age%20structure%20comparison.pdf.]

Topic(s)

Age
Ageing Error
Precision
Bias
Age Comparisons

Examples

Run this code

data(WhitefishLC)
str(WhitefishLC)
head(WhitefishLC)

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