FSAdata (version 0.3.0)

LakeTroutALTER: Biological characteristics of Lake Trout from Arctic LTER.

Description

Biological characteristics -- lengths, weight, age, and sex -- of Lake Trout (Salvelinus namaycush) from sampled from Lake NE12 of the Arctic Long Term Ecological Research location.

source

Data was originally available at ecosystems.mbl.edu/ARC/lakes/fish/89mcne12.html. However, it does not appear to be available there now. It seems like it should still be available at the http://ecosystems.mbl.edu/ARC/lakes/fish/index.shtml{Arctic LTER site}.

Topic(s)

• Length frequency
• Length-weight
• Length conversion
• Growth
• von Bertalanffy
• Size Structure

concept

'Length Frequency' 'Length-Weight' 'Growth' 'von Bertalanffy' 'Size Structure'

Details

Lake trout were removed from Lake NE12 in the summers of 1986, 1988, and 1989 using five-panel experimental gill nets (mesh size of 0.75, 1, 1.5, 2, and 2.5 inches). Lengths, weights, and sex were recorded from the fish while otoliths, and if possible, stomachs and gonads were removed for future analysis. A check was performed on several otoliths by an independent colleague and prevents introduction of bias due to familiarity with the samples. The original file was cleaned in the following ways:

1. Only Lake Trout were kept in the data file.
2. All unknown sex fish were removed.
3. Fish with missing data (length, weight,age, or sex) were removed.
4. Decimals were removed from the ages.
5. The unique IDs for fish from 1989 were changed to start at 500.
6. The weight of fish number 509 was changed from 100 to 1100.

Examples

data(LakeTroutALTER)
str(LakeTroutALTER)
head(LakeTroutALTER)
op <- par(mfrow=c(2,2),pch=19)
## Four (of many possible) examples
hist(LakeTroutALTER$tl,main="")
plot(w~tl,data=LakeTroutALTER)
plot(tl~fl,data=LakeTroutALTER)
plot(tl~age,data=LakeTroutALTER)
par(op)