Catch-at-age for Gulf Menhaden, 1964-2004.

Description

Estimated catch-at-age for Gulf Menhaden (Brevoortia patronus), 1964-2004 from thereduction 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.

Topic(s)

• Mortality
• Catch curve

Examples

data(Menhaden1)
str(Menhaden1)
head(Menhaden1)
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")