Stock and recruitment data for Lake Trout from Gull Island Shoal, Lake Superior, 1964-1991.

Lake trout (Salvelinus namaycush) stock and recruitment by year at Gull Island Shoal, Lake Superior, 1964-1991.

Format

A data frame of 28 observations on the following 3 variables:

year: Year of data
stock: Mean CPE of adult female Lake Trout per 1000 m of gillnet captured in fall spawning surveys
recruits: Recruits (number of age-0 fish per ha) captured the following fall in bottom trawls

Source

From Schram, S.T., J.H. Selgeby, C.R. Bronte, and B.L. Swanson. 1995. Population recovery and natural recruitment of Lake Trout at Gull Island Shoal, Lake Superior, 1964-1992. Journal of Great Lakes Research. 21(supp.1):225-232. Obtained from Ransom Myers old online database. CSV file

Topic(s)

Stock-Recruit
Recruitment

Examples

data(LakeTroutGIS)
str(LakeTroutGIS)
#> 'data.frame':	28 obs. of  3 variables:
#>  $ year    : int  1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 ...
#>  $ stock   : num  9.06 15 13.33 15.04 15.56 ...
#>  $ recruits: num  11.12 2.06 9.87 9.05 2.06 ...
head(LakeTroutGIS)
#>   year     stock  recruits
#> 1 1964  9.061186 11.122833
#> 2 1965 14.999247  2.056489
#> 3 1966 13.329772  9.865068
#> 4 1967 15.044312  9.052129
#> 5 1968 15.564614  2.060606
#> 6 1969 10.697392  7.411257
op <- par(mfrow=c(1,2))
plot(recruits~year,data=LakeTroutGIS,type="l")
plot(recruits~stock,data=LakeTroutGIS)

par(op)