[FLR-list] Seasonal FLStock

[Iago.MOSQUEIRA at ec.europa.eu]

Hi,

There is at the moment no example of a seasonal FLStock in any FLR packages, although one needs to be added to FLasher, as it can forecast by season.

This is an object loaded from a seasonal SS3 SA model for Indian Ocean albacore tuna. The model has two sexes but this object has them collapsed

https://www.dropbox.com/s/bwijnp2b3ogjzbh/iotc_alb_sa2016.RData?dl=0

To create a seasonal object you need seasonal data. Remember seasons can be anything (months, weeks) but simply called then with sequential numbers (1:4, 1:12, 1:52), so that the order is clear.

If you pass to FLStock() an FLQuant with seasons, the whole object will have them:

stk <- FLStock(m=FQuant(0.1, dimnames=list(age=1:10, year=1980:2010, season=1:4)))

If you use ggplotFL, the plot of FLStock will take care of seasons. If you do plot(sa) after loading the example dataset above, you will see the seasonality in catches and ssb, but not in recruitment, as there is only recruitment in season 4.

Cheers,


Iago




> Piera Carpi (Cefas) piera.carpi at cefas.co.uk
> Wed Oct 17 15:12:57 CEST 2018

> Hi,

> I was wondering if there is any example of a seasonal FLStock (I couldn't find any), and if you could provide 
> some guidelines on how to set it up.

> Thanks,

> Piera


> Piera Carpi, PhD.
> Fisheries and Ecosystems
> Cefas, Pakefield Road, Lowestoft, Suffolk, NR33 0HT, UK
> Tel: +44(0) 1502 524447

> AMARE-MED 2017 (Advanced School on Multispecies Approaches in the Mediterranean)

--
Dr Iago Mosqueira

European Commission
DG Joint Research Centre
Directorate D - Sustainable Resources
Unit D.02 Water and Marine Resources

TP 051, Via Enrico Fermi 2749
I-21027 Ispra (VA), Italy

Phone : +39 0332 785413

iago.mosqueira at ec.europa.eu