Biological data for Black Drum from Virginia waters of the Atlantic Ocean, 2001.

Description

Biological data (lengths, weights, ages (from otoliths), and sex) for Black Drum (Pogonias cromis) from Virginia waters of the Atlantic Ocean, 2001.

Format

A data frame with 141 observations on the following 9 variables.

• year: Year of capture (all 2001)
• agid: Unique identification number
• spname: Species name (all “Black Drum”)
• month: Month of capture
• day: Day of capture
• weight: Weight (lbs) – most are missing
• tl: Total length (mm)
• sex: Sex (female, male, and unknown)
• otoage: Age (yrs; from otoliths)

Topic(s)

• Growth
• von Bertalanffy
• Weight-Length

Note

Used in the Introductory Fisheries Analyses with R book.

Source

Obtained directly from the Virginia Marine Resources Commission via Hank Liao.

Examples

data(BlackDrum2001)
str(BlackDrum2001)
head(BlackDrum2001)
plot(tl~otoage,data=BlackDrum2001)