mackerel {sm}

The abundance of mackerel eggs

Description

These data record the abundance of mackerel eggs off the coast of north-western Europe, from a multi-country survey in 1992.

The variables are:

Density	egg density
mack.lat	latitude of sampling position
mack.long	longitude of sampling position
mack.depth	bottom depth
Temperature	surface temperature
Salinity	salinity

Background to the survey and the data are provided by Watson et al. (1992), Priede and Watson (1993) and Priede et al (1995). Borchers et al (1997) describe an analysis of the data.