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Repeated field detections are not a cold-tolerance experiment
The evidence library is allowed to change in public. This page preserves the revised boundary, why it moved and which guides were affected.
What changed
The species, surplus, temperature and breeding boundary now includes the 2018 Polish occurrence study while separating strong identity evidence from establishment certainty, cold tolerance, traced release and aquarium care.
Why it changed
Fifteen field shrimp were collected in 2003, 2013 and 2017, with one ovigerous female and seven field COI accessions. Most effort was qualitative, no winter temperature or sample was reported, the canal received heated power-station water and repeated yearly introductions remained an explicit alternative. A shared COI haplotype with six aquarium animals did not identify a source colony or release event.
Sources reviewed for this change
Affected practical guides
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