tigers {MQMF}

tigers is tiger prawn recruitment data from Penn & Caputi 1986

Description

tigers is a dataset of only 14 rows of data with a column of Spawning index and Recruitment index, as a data.frame. The timing of the recruitment index is up to half a year after the spawning index.

Format

A data.frame of spawning recruitment data

Spawn

the estimated spawning biomass index in a year (Aug - Oct)

Recruit

estimated recruitment from the biomass in each year (Mar - May)

Subjects

• Stock-recruitment curves

• Beverton-Holt and Ricker Models

• Static model fitting

Source

Extracted from Table 2, page 496 of Penn, J.W. and N. Caputi (1986) Spawning stock-recruitment relationships and environmental influences on the tiger prawn (Penaeus esculentus) fishery in Exmouth Gulf, Western Australia. Australian Journal of Marine and Freshwater Research 37: 491-505. Sorted on spawning index.

Examples

 data(tigers)
 tigers
 oldpar <- par(no.readonly=TRUE)
 plot1(tigers$Spawn,tigers$Recruit,type="p",pch=16,cex=1.25)
 par(oldpar)