WalleyeErie2: Biological data for Walleye from Lake Erie, 2003-2014.

In FSAdata: Data to Support Fish Stock Assessment ('FSA') Package

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These unpublished data are from the Ohio Department of Natural Resources, Division of Wildlife (via Christopher Vandergoot).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. CSV file

Examples

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

FSAdata documentation built on Aug. 24, 2023, 5:06 p.m.