Growth increment data for West Bearskin Lake, MN, Smallmouth Bass.

Description

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).

Format

A data frame of 445 observations on the following 20 variables:

• species: Species of the fish (SMB for each fish in this file)
• lake: Lake fish was captured in (WB for each fish in this file)
• gear: Gear used to capture the fish (T=Trapnet and E=Electrofishing)
• yearcap: Year fish was captured (1988, 1989, or 1990)
• fish: A unique identifier for each fish
• agecap: Assigned age-at-capture for the fish (from scales)
• lencap: Total length-at-capture for the fish (mm)
• anu1: Magnified scale radius (mm) to the 1st annulus
• anu2: Magnified scale radius (mm) to the 2nd annulus
• anu3: Magnified scale radius (mm) to the 3rd annulus
• anu4: Magnified scale radius (mm) to the 4th annulus
• anu5: Magnified scale radius (mm) to the 5th annulus
• anu6: Magnified scale radius (mm) to the 6th annulus
• anu7: Magnified scale radius (mm) to the 7th annulus
• anu8: Magnified scale radius (mm) to the 8th annulus
• anu9: Magnified scale radius (mm) to the 9th annulus
• anu10: Magnified scale radius (mm) to the 10th annulus
• anu11: Magnified scale radius (mm) to the 11th annulus
• anu12: Magnified scale radius (mm) to the 12th annulus
• radcap: Total scale radius at time of capture

Topic(s)

• Growth increment analysis
• Weisberg linear growth model
• Back-Calculation

Note

Data are in one-fish-per-line format.

Source

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.

See Also

Used in capHistSum and mrClosed examples. Also see wblake from alr4 for the same dataset with only the agecap, lencap, and radcap variables.

Examples

str(SMBassWB)
head(SMBassWB)