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Catch-at-age of Channel Catfish from two sections of the Platte River, NB.

Source: R/CCatfishNB.R
CCatfishNB.Rd

Catch-at-age of Channel Catfish (Ictalurs puncatatus) from two sections of the Platte River, NB, in 2007 and 2008.

Format

A data frame of 26 observations on the following 3 variables:

age

Age (years) assigned from pectoral spines

catch

Number of captured fish with baited hoopnets and electrofishing

loc

Location of collection (Central and Lower)

Source

From (approximately) Figure 3-14 in Barada, T.J. 2009. Catfish population dynamics in the Platte River, Nebraska. Master's thesis, University of Nebraska, Lincoln, NE. CSV file

Note

Used in the Introductory Fisheries Analyses with R book.

Topic(s)

  • Mortality

  • Catch curve

Examples

data(CCatfishNB)
str(CCatfishNB)
#> 'data.frame':	26 obs. of  3 variables:
#>  $ age  : int  0 1 2 3 4 5 6 7 8 9 ...
#>  $ catch: int  13 60 140 106 26 17 17 10 5 9 ...
#>  $ loc  : Factor w/ 2 levels "Central","Lower": 1 1 1 1 1 1 1 1 1 1 ...
head(CCatfishNB)
#>   age catch     loc
#> 1   0    13 Central
#> 2   1    60 Central
#> 3   2   140 Central
#> 4   3   106 Central
#> 5   4    26 Central
#> 6   5    17 Central
op <- par(mfrow=c(1,2),pch=19)
plot(log(catch)~age,data=CCatfishNB,subset=loc=="Central",main="Central")
plot(log(catch)~age,data=CCatfishNB,subset=loc=="Lower",main="Lower")

par(op)