Pacific Halibut (Hippoglossus stenolepis) stock, recruitment, landings, and fishing mortality by year, 1929-1991.
Format
A data frame of 63 observations on the following 5 variables:
- year
Year of data
- ssb
Spawning stock biomass (tonnes)
- rec
Recruits (thousands)
- land
Landings (in millions of pounds)
- fmort
Fishing related mortality
Source
From Anonymous. 1989. International Pacific Halibut Commission. Annual Report 1989.; Myhre, Gordon, Peltonen, Stpierre, Skud, and Walden. International Pacific halibut Commission. Technical Report No. 14.; Pers. Comm. with Pat Sullivan. Obtained from Ransom Myers old online database. CSV file
Examples
data(HalibutPAC)
str(HalibutPAC)
#> 'data.frame': 63 obs. of 5 variables:
#> $ year : int 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 ...
#> $ ssb : num NA NA NA NA NA ...
#> $ rec : num NA NA NA NA NA ...
#> $ land : num 56.9 49.4 44.2 44.5 46.8 47.5 47.3 48.9 49.5 49.6 ...
#> $ fmort: num NA NA NA NA NA NA 0.27 0.37 0.37 0.32 ...
head(HalibutPAC)
#> year ssb rec land fmort
#> 1 1929 NA NA 56.9 NA
#> 2 1930 NA NA 49.4 NA
#> 3 1931 NA NA 44.2 NA
#> 4 1932 NA NA 44.5 NA
#> 5 1933 NA NA 46.8 NA
#> 6 1934 NA NA 47.5 NA
op <- par(mfrow=c(1,2),pch=19)
plot(rec~year,data=HalibutPAC,type="l")
plot(rec~ssb,data=HalibutPAC)
par(op)