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Field observation Direct Neocaridina evidence

First findings in Ukraine and current distribution trends of Neocaridina davidi in freshwaters of Europe

Sidorovskyi, 2026. Fisheries Science of Ukraine 1(75): 98-114.

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This record is a claim boundary, not a quality badge. Evidence class and species relationship describe what was studied. They do not make the result universal, complete or automatically applicable to a home aquarium.

Source taxon as published
Neocaridina davidi
Environment
Two urban water bodies in Kharkiv, Ukraine, surveyed between June 2020 and December 2025
Life stages
field-collected adult, ovigerous female
Reviewed
2026-08-12

What was studied

Study shape: Hydrobiological dip-net collections at two coordinates were preserved in 96 percent ethanol and identified by stereomicroscopy; later visits were used to report non-detection after the initial records.

Experimental unit: Field collection event at either of two Kharkiv water bodies; sampling frequency, effort and detection probability were not reported

Endpoints: specimen occurrence, body length, sex count, ovigerous-female count, later non-detection, site context.

Claim boundary

What it can support: The article documents 10 and 6 shrimp at one site in 2020 and 2021, seven at a second site in 2024, ovigerous females in every positive collection and later non-detection at both sites.

What it cannot support: Later non-detection does not prove extinction because sampling effort and detectability were not reported. Identification was described as stereomicroscopy without diagnostic character results or a molecular confirmation. The end of warm runoff was not an assigned temperature treatment, and no released source stock was traced. The observations do not establish a thermal threshold, prove release causation or make any climate release-safe.

Publication status audit

Matched in dated Crossref query

The canonical DOI appeared in the dated broad query and carried no registered update in that response. This is a metadata observation, not proof that the work has never changed.

Metadata snapshot reviewed 2026-08-12. Inspect the method, unmatched queue and limitations.

Correction impact

If this source boundary changes, these are the known downstream consumers. The list distinguishes scientific re-review from generated parity and historical follow-up.

Editorial review required (4)

This curated wording or synthesis must be reconsidered when the source boundary changes. A passing generator test cannot decide the new scientific meaning.

  • species decision card Tank-side decision card
    The card translates this guide into an observation, first action, next record and stopping boundary, so all four require editorial review when the source changes.
  • surplus decision card Tank-side decision card
    The card translates this guide into an observation, first action, next record and stopping boundary, so all four require editorial review when the source changes.
  • species practical guide Practical guide
    The guide uses this evidence record and its practical wording must remain inside the revised source boundary.
  • surplus practical guide Practical guide
    The guide uses this evidence record and its practical wording must remain inside the revised source boundary.

Generated from governing registry (13)

This surface derives from a governing registry and should update with it, but release tests must still prove parity and routing.

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How this record is classified

Field observation: Animals were observed in a field population. Occurrence and association do not create a home-aquarium optimum or prove causation.

Direct Neocaridina evidence: The source measured animals named within Neocaridina. Direct still does not mean universal or sufficient.

Topics: Wild populations, Temperature, Breeding, Species and taxonomy

Critically appraise this source without a score

These questions fit this record's field observation role. They are prompts, not automatic judgments. Open the original source to answer them.

  1. Identity and provenance: How were the organism, population, stock and life stage identified and sourced? A published name or seller label can hide a taxonomic, population or life-stage transfer.
  2. Independent unit: What unit was independently assigned or sampled, and how many units support each comparison? Animal counts do not create independent replication when animals share a vessel, site, family or treatment history.
  3. Comparison and context: What was the actual comparator, allocation process, environment, duration and material condition? A result has meaning only against the comparison and conditions that produced it.
  4. Endpoint and measurement: Which endpoint was measured, with what method, unit, timing, resolution and decision rule? One endpoint cannot silently become survival, welfare, diagnosis, reproduction or long-term population performance.
  5. Denominators and missingness: Are starting counts, exclusions, losses, missing observations and analysis denominators reconciled? Unreported or changing denominators can alter the apparent direction, precision and applicability of a result.
  6. Transfer boundary: What is the nearest tempting aquarium claim that this source design cannot establish? Direct evidence can still be narrow, and adjacent evidence can be useful only while the inference remains visible.
  7. Sampling frame: How were sites, dates, habitats and animals selected, and what population can that sampling represent? Convenient or uneven sampling limits prevalence, abundance and seasonal inference.
  8. Sampling effort: Was effort standardized or recorded across sites, times and environmental conditions? Observed counts can change because detectability or effort changed rather than the population.
  9. Association: Which co-varying environmental or biological factors could explain the observed association? Field correlation does not by itself identify cause or a husbandry intervention.
  10. Detection and absence: Could non-detection reflect gear, visibility, season, behavior or identification limits? Not observed is not equivalent to absent.

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