haddock {fishmethods}

Biological data for haddock (Melanogrammus aeglefinus)

Description

The haddock data frame has 15 rows and 4 columns. Age, weight at spawning, partial recruitment, and fraction mature data for haddock (Melanogrammus aeglefinus) used by Gabriel et al. (1989) to calculate spawning stock biomass-per-recruit.

Usage

haddock

Format

This data frame contains the following columns:

age

vector of ages

ssbwgt

vector of weights at spawning for each age

partial

partial recruitment vector

pmat

vector of fraction of females mature at age

Source

Gabriel, W. L., M. P. Sissenwine, and W. J. Overholtz. 1989. Analysis of spawning stock biomass per recruit: an example for Georges Bank haddock. North American Journal of Fisheries Management 9: 383-391.