PSDlit: Gabelhouse five-cell length categories for various species.

In FSA: Simple Fisheries Stock Assessment Methods

Gabelhouse five-cell length categories for various species.

Description

Cutoffs for the Gabelhouse five-cell length categories for a variety of species.

Format

A data frame of 58 observations on the following 11 variables:

species

Species name.

group

Sub-group name (e.g., "landlocked" or "lotic").

substock.in

Zero inches.

stock.in

Stock length in inches.

quality.in

Quality length in inches.

preferred.in

Preferred length in inches.

memorable.in

Memorable length in inches.

trophy.in

Trophy length in inches.

substock.cm

Zero cm.

stock.cm

Stock length in cm.

quality.cm

Quality length in cm.

preferred.cm

Preferred length in cm.

memorable.cm

Memorable length in cm.

trophy.cm

Trophy length in cm.

source

Literature source for the length entries.

Details

Entries for some species (e.g., “Muskellunge” and “Walleye”) have been duplicated for sub-groups to facilitate use with relative weight calculations. For example, entries for “Muskellunge (overall)”, “Muskellunge (female)”, and “Muskellunge (male)” are duplicates of the entry for “Muskellunge”; i.e., these entries in PSDlit are not necessarily just for those sub-groups but this allows for seamless similar computations of relative weights for these sub-groups.

Topic(s)

• Size structure

• Proportional size structure

• Relative stock density

• Proportional stock density

IFAR Chapter

6-Size Structure.

Source

Original summary table from Dr. Michael Hansen, University of Wisconsin-Stevens Point. Additional species have been added by the package author from the literature.

References

Ogle, D.H. 2016. Introductory Fisheries Analyses with R. Chapman & Hall/CRC, Boca Raton, FL.

See Also

See psdVal, psdCalc, psdPlot, psdAdd, and tictactoe for related functionality.

Examples

str(PSDlit)
head(PSDlit)

FSA documentation built on Jan. 10, 2026, 9:07 a.m.