data_wae_is_long {Petersen}

Walleye data with incomplete stratification with length covariate

Description

Data used in Premarathna, W.A.L., Schwarz, C.J., Jones, T.S. (2018) Partial stratification in two-sample capture–recapture experiments. Environmetrics, 29:e2498. https://doi.org/10.1002/env.2498

Usage

data(data_wae_is_long)

Format

data_wae_is_long A data frame with many rows and 3 columns

cap_hist.

Capture history with possible histories as noted below

freq.

Number of fish with this history.

length

Length of fish (inches)

Details

Fish were tagged on the spawning grounds and recovered in the summer gillnet assessment.

Length was measured a both times and didn't not change very much between the two sampling occasions. The value recorded below is the average of the two lengths if both lengths were present.

Rather than sexing all of the fish, only a sub-sample of unmarked fish is sexed at each sampling occasion. Possible capture histories are then M0, F0, MM, FF, U0, UU, 0M, 0F