DATRASextra

Tobias Mildenberger, Federico Maioli,
Casper Berg


DTU Aqua




tokami/DATRASextra

DATRASextra

What it is

  • A helper package for extracting, cleaning, and manipulating ICES DATRAS survey data (NE Atlantic)
  • A workflow-oriented toolbox following FishGlob and ICES standards
  • Functions to simplify working with HH, HL, CA DATRAS tables
  • Consistent utilities for quality control, standardisation, and data prep
  • Extension to the existing DTUAqua/DATRAS package

What it is not

  • Not a database or storage system
  • Not an official ICES product

  • relies on the well tested DTUAqua/DATRAS

How DATRASextra can help you

  • Makes working with DATRAS data easier
  • Gets you to analysis faster
  • Eliminates repetitive data-wrangling
  • Handles ICES DATRAS quirks automatically

Main functions (FishGlob style)

  • downloadDATRAS(surveys = ..., years = ..., dir = ...)
  • readDATRAS()
  • clean(..., do.fishglob = TRUE) | cleanFishglob() Subset columns and standardize species names
  • prune(..., do.fishglob = TRUE) | pruneFishglob() Remove unnecessary columns
  • addSweptArea(..., do.fishglob = TRUE) | addSweptAreaFishglob() Impute missing swept area
  • addWeight(..., do.fishglob = TRUE) | addWeightFishglob() Compute weights from numbers-at-length using a & b parameters
  • formatFishglob.DATRASraw() Format following FishGlob standards

FishGlob +

  • Supports juvenile/adult and length-based workflows
  • Alternatives for swept area imputation

Next steps

  • Include gear catchability
  • Time-varying a & b params from CA

Get notified when DATRASextra goes live

Thank You!

tobm@aqua.dtu.dk fedma@aqua.dtu.dk