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PIFSC-Protected-Species-Division / LTabundR

R package for design-based line-transect density estimation
https://pifsc-protected-species-division.github.io/LTabundR-vignette/
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How to handle mixed-species sightings with no percentages provided? #8

Closed ericmkeen closed 2 months ago

ericmkeen commented 6 months ago

ABUND rejected mixed-species sightings with no percentages. In LTabundR, should we consider something similar or direct these down some sort of a “low” group size only track? This question has come up during HICEAS 2023 planning.

Related to this, what to do when a group size estimate is included when an observer only saw one species in a mixed-species group?

ericmkeen commented 2 months ago

As noted in this thread [here])https://github.com/PIFSC-Protected-Species-Division/LTabundR/issues/10#issuecomment-2209291776), our approach to these questions is: never fill in data, but make is easier for users to find and address gaps in data.

Therefore any species within mixed-species sightings that do not have any valid percentages from any observers will have a best estimate of NA and ss_valid of FALSE.

These will be flagged in the new function lta_checks() so that these issues can be fixed if desired before running lta() or similar functions.

Change has been applied, working on lta_checks() and QAQC now.