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Field observation Direct Neocaridina evidence

Population dynamics of Neocaridina davidi in the thermally polluted Gillbach stream

Schoolmann and Arndt, 2018. Limnologica 71: 1-7.

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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
Thermally affected German stream followed for 27 months
Life stages
field population, ovigerous female
Reviewed
2026-08-12

What was studied

Study shape: Repeated field sampling described population structure, reproduction and dispersal.

Experimental unit: Field samples from one invaded stream system

Endpoints: size-frequency structure, ovigerous females, population persistence, dispersal.

Claim boundary

What it can support: A reproducing feral population persisted and dispersed under the recorded field conditions.

What it cannot support: Field estimates do not establish aquarium lifespan, a species temperature optimum or a release-safe climate.

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 (11)

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

  • Colour proves the species or purity of a line Curated claim check
    The exact claim trace uses this record as interpretive context: Population identity requires evidence beyond visible aquarium color.
  • growth 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 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.
  • growth practical guide Practical guide
    The guide uses this evidence record and its practical wording must remain inside the revised source boundary.
  • 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.
  • round1-taxonomy-identity Curated first-round reviewer assignment
    The frozen reviewer scope or consequential-failure check uses this record through the assigned claim trace or comparison and must be reconsidered before invitation or response.
  • aquarium-lifespan knowledge gap Canonical knowledge gap
    The current knowledge-gap boundary depends on a dated search that used this exact source and must be reconsidered if the source meaning changes.
  • aquarium-lifespan answerability brief Answerability brief
    The decision, endpoint, minimum design or closure rule may change when evidence used in the linked gap search is corrected.
  • aquarium-lifespan research allocation Current research allocation
    The current allocation, activation trigger, next permitted unit or stop decision may change when evidence used in the linked gap search is corrected.

Generated from governing registry (19)

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

Historical record needs follow-up decision (1)

Do not silently rewrite history. Decide whether the prior change record remains accurate and publish a new correction or scope note when needed.

Inspect the corpus-wide propagation audit.

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: Growth and lifespan, Breeding, Wild populations

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.

Read the complete appraisal framework.

Where it is used

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