Growth data from Smallmouth Bass (Micropterus dolomieu) captured in West Bearskin Lake, MN. Five samples were collected over three years (1988-1990) with two gears (fall -- trapnets, spring -- electrofishing).
A data frame of 445 observations on the following 20 variables:
Species of the fish (SMB
for each fish in this file)
Lake fish was captured in (WB
for each fish in this file)
Gear used to capture the fish (T
=Trapnet and E
=Electrofishing)
Year fish was captured (1988
, 1989
, or 1990
)
A unique identifier for each fish
Assigned age-at-capture for the fish (from scales)
Total length-at-capture for the fish (mm)
Magnified scale radius (mm) to the 1st annulus
Magnified scale radius (mm) to the 2nd annulus
Magnified scale radius (mm) to the 3rd annulus
Magnified scale radius (mm) to the 4th annulus
Magnified scale radius (mm) to the 5th annulus
Magnified scale radius (mm) to the 6th annulus
Magnified scale radius (mm) to the 7th annulus
Magnified scale radius (mm) to the 8th annulus
Magnified scale radius (mm) to the 9th annulus
Magnified scale radius (mm) to the 10th annulus
Magnified scale radius (mm) to the 11th annulus
Magnified scale radius (mm) to the 12th annulus
Total scale radius at time of capture
Data from the linear growth modeling software distributed in support of Weisberg, S. 1993. Using hard-part increment data to estimate age and environmental effects. Canadian Journal of Fisheries and Aquatic Sciences 50:1229-1237.
Data are in one-fish-per-line format.
Growth increment analysis
Weisberg linear growth model
Back-Calculation
Used in capHistSum
and mrClosed
examples. Also see wblake
from alr4 for the same dataset with only the agecap
, lencap
, and radcap
variables.
str(SMBassWB)#> 'data.frame': 445 obs. of 20 variables: #> $ species: Factor w/ 1 level "SMB": 1 1 1 1 1 1 1 1 1 1 ... #> $ lake : Factor w/ 1 level "WB": 1 1 1 1 1 1 1 1 1 1 ... #> $ gear : Factor w/ 2 levels "E","T": 1 1 1 1 1 1 1 1 1 1 ... #> $ yearcap: int 1988 1988 1988 1988 1988 1988 1989 1990 1990 1990 ... #> $ fish : num 5 3 2 4 6 7 50 482 768 428 ... #> $ agecap : int 1 1 1 1 1 1 1 1 1 1 ... #> $ lencap : int 71 64 57 68 72 80 55 75 75 71 ... #> $ anu1 : num 1.91 1.88 1.09 1.32 1.59 ... #> $ anu2 : num NA NA NA NA NA NA NA NA NA NA ... #> $ anu3 : num NA NA NA NA NA NA NA NA NA NA ... #> $ anu4 : num NA NA NA NA NA NA NA NA NA NA ... #> $ anu5 : num NA NA NA NA NA NA NA NA NA NA ... #> $ anu6 : num NA NA NA NA NA NA NA NA NA NA ... #> $ anu7 : num NA NA NA NA NA NA NA NA NA NA ... #> $ anu8 : num NA NA NA NA NA NA NA NA NA NA ... #> $ anu9 : num NA NA NA NA NA NA NA NA NA NA ... #> $ anu10 : num NA NA NA NA NA NA NA NA NA NA ... #> $ anu11 : num NA NA NA NA NA NA NA NA NA NA ... #> $ anu12 : num NA NA NA NA NA NA NA NA NA NA ... #> $ radcap : num 1.91 1.88 1.1 1.33 1.59 ...head(SMBassWB)#> species lake gear yearcap fish agecap lencap anu1 anu2 anu3 anu4 anu5 anu6 #> 1 SMB WB E 1988 5 1 71 1.90606 NA NA NA NA NA #> 2 SMB WB E 1988 3 1 64 1.87707 NA NA NA NA NA #> 3 SMB WB E 1988 2 1 57 1.09227 NA NA NA NA NA #> 4 SMB WB E 1988 4 1 68 1.31848 NA NA NA NA NA #> 5 SMB WB E 1988 6 1 72 1.59283 NA NA NA NA NA #> 6 SMB WB E 1988 7 1 80 1.91602 NA NA NA NA NA #> anu7 anu8 anu9 anu10 anu11 anu12 radcap #> 1 NA NA NA NA NA NA 1.90606 #> 2 NA NA NA NA NA NA 1.87707 #> 3 NA NA NA NA NA NA 1.09736 #> 4 NA NA NA NA NA NA 1.33108 #> 5 NA NA NA NA NA NA 1.59283 #> 6 NA NA NA NA NA NA 1.91602