Harvest, escapement, and return of northern Southeast Alaska Pink Salmon (Oncorhynchus gorbuscha), 1960-1991, and average sea surface temperature between June and November off Sitka, Alaska, 1960-1990.
Format
A data frame of 34 rows on the following 5 variables:
- year
Year of data
- harvest
Harvest (thousands of fish)
- escapement
Escapement (thousands of fish)
- return
Returns (thousands of fish) as sum of harvest and escapement from two years later (lagging is for proper brood year correspondence)
- SST
Average sea surface temperature (C) between June and November off Sitka, AK from one year latter (lagging is for matching when the salmon are actually in the ocean)
Source
From Table 3.1 in Quinn, T.J. and R.B. Deriso. 1999. Quantitative Fish Dynamics. Oxford University Press, New York, New York. CSV file
Examples
data(PSalmonAK)
str(PSalmonAK)
#> 'data.frame': 34 obs. of 5 variables:
#> $ year : int 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 ...
#> $ harvest : int NA NA 1260 7624 489 10901 7281 5159 4786 2429 ...
#> $ escapement: int NA NA 1418 2835 1957 4033 2750 2891 3098 2001 ...
#> $ return : int 2678 10459 2446 14934 10031 8050 7884 4430 13086 6051 ...
#> $ SST : num NA 11.2 11.6 11.5 12.3 ...
head(PSalmonAK)
#> year harvest escapement return SST
#> 1 1958 NA NA 2678 NA
#> 2 1959 NA NA 10459 11.23
#> 3 1960 1260 1418 2446 11.63
#> 4 1961 7624 2835 14934 11.46
#> 5 1962 489 1957 10031 12.33
#> 6 1963 10901 4033 8050 11.62
op <- par(mfrow=c(1,2))
plot(return~year,data=PSalmonAK)
plot(return~escapement,data=PSalmonAK)
par(op)