Filters combine with AND. Add a second species to lay it over the map — the page stays with the taxon in the header.
Crayfish carry other organisms: ectosymbionts riding on the shell and gills, and pathogens inside them — Aphanomyces astaci above all. World of Crayfish® records those associations on the occurrence itself, with the organism's name and its functional class (ectosymbiont, virus, bacterium, fungus, other).
This tab makes the symbiont the subject. Pick one and the map shows every occurrence it was recorded on, across all host species. To ask the opposite question — where is this crayfish, counting only records that carry a symbiont — use the Ectosymbiont filter on Raw Data; the crayfish stays the subject there.
An association is filed only where the organism was actually detected. A negative screen is not a record of absence, so it is not stored as one.
Occurrence data are valuable for the broader scientific community. If you have been using this dataset as part of an ongoing publication, you can use our portal as a data repository — we will provide you with accession codes reserved for your dataset since submission. You can revisit and update publication details once your paper is published.
FAIR-aligned data management. The World of Crayfish® platform follows FAIR principles (Findable, Accessible, Interoperable, Reusable) with a community-oriented data stratification model:
Regardless of confidentiality level, all data contribute to aggregated spatial artefacts (hexagonal summaries) without revealing exact coordinates.
Data types accepted: unpublished field data, data under review (WoC® accession codes serve as repository identifiers), or records digitised from published literature. Before submitting, verify whether these records exist — use Search to check by DOI, citation, or species.
Pick occurrences off the map above, add stops of your own, export as GPX.