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.
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.
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
References
Ogle, D.H. 2016. Introductory Fisheries Analyses with R. Chapman & Hall/CRC, Boca Raton, FL.
Examples
str(PSDlit)
#> 'data.frame': 96 obs. of 15 variables:
#> $ species : chr "Alabama Bass" "Arctic Grayling" "Bighead Carp" "Bigmouth Buffalo" ...
#> $ group : chr NA NA NA NA ...
#> $ substock.in : int 0 0 0 0 0 0 0 0 0 0 ...
#> $ stock.in : num 7 8 11.8 11 6 ...
#> $ quality.in : num 11 12 21.2 18 9 ...
#> $ preferred.in: num 14 16 26.8 24 12 ...
#> $ memorable.in: num 17 20 35 30 15 46.5 12 35 10 20 ...
#> $ trophy.in : num 20 22 43.8 37 18 ...
#> $ substock.cm : int 0 0 0 0 0 0 0 0 0 0 ...
#> $ stock.cm : num 18 20 30 28 15 40 13 30 8 20 ...
#> $ quality.cm : int 28 30 54 46 23 72 20 51 15 30 ...
#> $ preferred.cm: int 35 40 68 61 30 90 25 76 20 40 ...
#> $ memorable.cm: int 43 50 89 76 39 118 30 89 25 50 ...
#> $ trophy.cm : num 51 55 111 94 46 148 38 114 30 60 ...
#> $ source : chr "Sammons et al. (2025)" "Hyatt (2000)" "Phelps and Willis (2013)" "Bister et al. (2000)" ...
head(PSDlit)
#> species group substock.in stock.in quality.in preferred.in
#> 1 Alabama Bass <NA> 0 7.00 11.00 14.00
#> 2 Arctic Grayling <NA> 0 8.00 12.00 16.00
#> 3 Bighead Carp <NA> 0 11.75 21.25 26.75
#> 4 Bigmouth Buffalo <NA> 0 11.00 18.00 24.00
#> 5 Black Bullhead <NA> 0 6.00 9.00 12.00
#> 6 Black Carp <NA> 0 15.75 28.25 35.50
#> memorable.in trophy.in substock.cm stock.cm quality.cm preferred.cm
#> 1 17.0 20.00 0 18 28 35
#> 2 20.0 22.00 0 20 30 40
#> 3 35.0 43.75 0 30 54 68
#> 4 30.0 37.00 0 28 46 61
#> 5 15.0 18.00 0 15 23 30
#> 6 46.5 58.25 0 40 72 90
#> memorable.cm trophy.cm source
#> 1 43 51 Sammons et al. (2025)
#> 2 50 55 Hyatt (2000)
#> 3 89 111 Phelps and Willis (2013)
#> 4 76 94 Bister et al. (2000)
#> 5 39 46 Gabelhouse (1984a)
#> 6 118 148 Phelps and Willis (2013)