PLF.f: Compute the proportion of large fish from the survey data

In duplisea/size: Size based indicators for the northern Gulf of St Lawrence groundfish survey

Description

The proporption of large fish indicator by abundance.

Usage

PLF.f(cutoff = 30, species.group = "demersal", codeqc = 792)

Arguments

cutoff	the size (cm) marking the ditinction between large and small fish. Large fish are >= to this size.
species.group	the species group you want to be represented in the data. The PLF is generally computed only for demersals. Choices are "groundfish", "demersal", "pelagic". If "code", then you need to provide the Quebec species numerical code (codeqc).
codeqc	the species numerical code used in Quebec region for a species. 792 is unspeciated redfish. Look at the species table (codeqc) for other species

References

Greenstreet, S.P., Rogers, S.I., Rice, J.C., Piet, G.J., Guirey, E.J., Fraser, H.M. and Fryer, R.J. 2010. Development of the EcoQO for the North Sea fish community. ICES Journal of Marine Science 68: 1-11.

duplisea/size documentation built on Sept. 11, 2019, 11:05 a.m.