plaice: plaice data derived from Beverton and Holt, 1957 for European...

In haddonm/datalowSA: A Package to Faciliate Application of Data poor Stock Assessments

plaice data derived from Beverton and Holt, 1957 for European Plaice.

Description

plaice data including fish, glb, props, agedata, and lendata for North sea plaice dervied from tables and the text of the classical Beverton and Holt, 1957, book. Includes age data that is useful for illustratung the catch curves. Much of this data has also been included in the age-structured model described in Haddon, 2011.

Usage

plaice

Format

A list of five objects with only the first four containing data, the lendata only contains formatted data for illustrating that format, it is not real data. The other objects contain real data.

fish

a data.frame containing year, catch, cpue, SE of the cpue

glb

biological parameters relating to growth, selectivity, weight-at-age, steepness, and resilience and spsname

props

contains six variables ages, laa, waa, maa, sela, and feca, which are all relative to age.

agedata

a list of 5 objects, yrage - the years in which age data are available, ages - the observed ages, agemax - the maximum age, nage - the number of observed ages, and naa - the numbers-at-age by year

lendata

a list of 5 objects akin to the agedata object but for length data.

Examples

 ## Not run: 
 data(plaice)
 str(plaice)
 print(plaice$fish)
 print(plaice$agedata)

## End(Not run)

haddonm/datalowSA documentation built on Nov. 5, 2023, 6:40 p.m.