Estimated catch-at-age for Gulf Menhaden (Brevoortia patronus), 1964-2004 from the reduction fishery in the U.S. Gulf of Mexico.
Format
A data frame with 41 observations on the following 7 variables.
- year
Year of capture.
- age0
Estimated catch (millions) of age-0 fish.
- age1
Estimated catch (millions) of age-1 fish.
- age2
Estimated catch (millions) of age-2 fish.
- age3
Estimated catch (millions) of age-3 fish.
- age4
Estimated catch (millions) of age-4 fish.
- age5
Estimated catch (millions) of age-5 fish.
- age6
Estimated catch (millions) of age-6 fish.
Source
From Table 2 in Vaughan, D.S., K.W. Shertzer, and J.W. Smith. 2007. Gulf menhaden (Brevoortia patronus) in the U.S. Gulf of Mexico: Fishery characteristics and biological reference points for management. Fisheries Research 83:263-275. CSV file
Examples
data(Menhaden1)
str(Menhaden1)
#> 'data.frame': 41 obs. of 8 variables:
#> $ year: int 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 ...
#> $ age0: num 2.8 43.4 30.5 22.4 65.1 20.8 50.2 21.6 19.1 49.9 ...
#> $ age1: num 3329 5031 3314 4268 3475 ...
#> $ age2: num 1495 1077 865 338 1001 ...
#> $ age3: num 118.1 80.3 33.8 13 37.5 ...
#> $ age4: num 4.4 0.7 0.3 0 0.5 0 0 4.1 4 1.3 ...
#> $ age5: num 0 0 0 0 0 0 0 0 0 0 ...
#> $ age6: num 0 0 0 0 0 0 0 0 0 0 ...
head(Menhaden1)
#> year age0 age1 age2 age3 age4 age5 age6
#> 1 1964 2.8 3329.3 1495.2 118.1 4.4 0 0
#> 2 1965 43.4 5031.4 1076.6 80.3 0.7 0 0
#> 3 1966 30.5 3314.4 865.2 33.8 0.3 0 0
#> 4 1967 22.4 4267.7 337.7 13.0 0.0 0 0
#> 5 1968 65.1 3475.2 1001.3 37.5 0.5 0 0
#> 6 1969 20.8 6075.0 1286.3 31.7 0.0 0 0
ages <- 0:6
# Extract one year, delete year column (the -1), and transpose to be a vector
ct <- t(Menhaden1[Menhaden1$year==1974,-1])
plot(ct~ages,pch=16,type="b",xlab="Age",ylab="Est. Catch (Millions)",main="year==1974")
