The number of Lake Sturgeon (Acipenser fulvescens) caught in multiple samples from Black Lake, MI in 1997. The caught fish were examined for previous marks, marked (if previously unmarked), and then returned to the population.
Format
A data frame with 6 observations on the following 4 variables:
- t
Sample number
- caught
Total number of fish caught in the sample
- recaptures
Number of previously marked fish in the sample
- retmarks
Number of marked fish (previously and newly marked) returned to the population
Source
From Table 1 in Baker, E.A. and D.J. Borgeson. 1999. Lake sturgeon abundance and harvest in Black Lake, Michigan, 1975-1999. North American Journal of Fisheries Management 19:1080-1088. CSV file
Examples
data(SturgeonBL)
str(SturgeonBL)
#> 'data.frame': 24 obs. of 4 variables:
#> $ t : int 1 2 3 4 5 6 7 8 9 10 ...
#> $ caught : int 3 2 4 4 4 1 2 4 5 4 ...
#> $ recaptures: int 0 0 0 0 1 0 0 0 0 0 ...
#> $ retmarks : int 3 2 4 4 4 1 2 4 5 4 ...
head(SturgeonBL)
#> t caught recaptures retmarks
#> 1 1 3 0 3
#> 2 2 2 0 2
#> 3 3 4 0 4
#> 4 4 4 0 4
#> 5 5 4 1 4
#> 6 6 1 0 1