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Year
1950
2026
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Overview
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.
Organism
Read this as a summary of the records, not of the organism.
These proportions describe where World of Crayfish® holds occurrences, and
sampling is uneven: a host that is studied more will look more infested than one
nobody has screened. Absence here is absence of records, never evidence of absence
in the wild.
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Occurrences Spatial Coverage Analysis
🔒Your data stays with you. All uploaded data is processed in your browser session and is not stored on our servers unless you explicitly choose to submit.
Main species (baseline distribution)
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Time range
1950
2026
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Check Results
Ready to paste in Methods
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Please interpret these results in the context of your study design and field conditions. The statistics above are based on spatial intersections with hexagonal grid cells and should complement — not replace — expert ecological judgment. check-Engine provided by World of Crayfish® (Ion et al. 2024).
WoC® Literature Coverage Analysis
This tool evaluates how well the baseline species is represented in the World of Crayfish® database relative to what is available in open scholarly and genomic repositories. It cross-references WoC® records against external sources to quantify indexing coverage. Note: many publications retrieved from these sources may not contain faunistic distribution data — low coverage percentages are expected and should not be interpreted as data gaps.
Select a species from the sidebar and set it as baseline to enable coverage analysis.
Ready to paste in Methods
Ready to paste in Results
This is a preliminary contextual assessment. OpenAlex indexes scholarly works broadly — many results represent taxonomic, molecular, or ecological studies that may not include distributional records. GenBank sequences reflect genetic data deposits, not occurrence records. Coverage percentages indicate indexing overlap, not data completeness. check-Engine provided by World of Crayfish® (Ion et al. 2024).
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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.
Remember: your data has not been saved — proceeding will submit it to WoC®.
FAIR-aligned data management. The World of Crayfish® platform follows FAIR principles (Findable, Accessible, Interoperable, Reusable) with a community-oriented data stratification model:
Level 0Open access — visible and downloadable by everyone. Typically used for non-indigenous (invasive) species records.Level 1Community access — visible and downloadable by registered users. Default for most indigenous species data.Level 2Restricted access — locations masked as hexagonal cells. Contact the data owner to request access.
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.
Click anywhere on the map above to capture coordinates, then fill in the details below.
⚠ This location appears to be in a marine/ocean area. Drag the marker to land if needed.
📚 Source
📍 Location
🦞 Crayfish
m
At least one population previously known at this location has been documented as disappeared. Older records within the buffer radius will be marked as extirpated.
🧫 Associated taxa (optional)
📝 Additional
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Fill the template with your occurrence data. Required fields: decimalLatitude, decimalLongitude, scientificName.
Feel free to choose World of Crayfish® as a permanent repository for your unpublished crayfish distribution datasets. We will provide you with accession codes for sharing.
Contributed Data
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🧭 Route Planner
Pick occurrences off the map above, add stops of your own, export as GPX.
Now click the points on the map you want to visit. Click one again to drop it.