Biological data for Walleye from Lake Erie, 2003-2014.

Description

Walleye (Sander vitreus) biological data (length, weight, sex, maturity, and age) from several locations in Lake Erie, October-November of 2003-2014.

Format

A data frame of 33734 observations on the following 10 variables:

• setID: Unique gear (multifilament gill net kegged 6 ft below surface) set identification number.

• loc: Regional location (1=Toledo to Huron, 2=Huron to Fairport Harbor, 3=Fairport Harbor to Conneaut).

• grid: 2.5-minute sampling grid location.
• year: Year of data.
• tl: Total length (mm).
• w: Weight (g). There are several missing values.
• sex: Sex (female, male).
• mat: Maturity (immature, mature).
• age: Age (yrs) from otoliths.

Topic(s)

• Growth
• von Bertalanffy
• Weight-Length
• Catch curve
• Mortality
• Maturity
• Size Structure
• Length Frequency
• Condition

Source

These unpublished data are from the Ohio Department of Natural Resources, Division of Wildlife (via Christopher Vandergoot). Do not use for other than educational purposes without permission from the source.

Examples

data(WalleyeErie2)
str(WalleyeErie2)
head(WalleyeErie2)
xtabs(~year+loc+sex,data=WalleyeErie2)