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Controlled experiment Direct Neocaridina evidence

To invest or not to invest, that is the question: male presence and genetic relatedness as modulators of female reproductive effort in a shrimp

Tropea and López Greco, 2024. Canadian Journal of Zoology 102(9): 721-734.

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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
Laboratory relatedness and male-presence comparison
Life stages
adult female, egg
Reviewed
2026-08-12

What was studied

Study shape: Female reproductive timing and biochemical investment were compared with brothers, non-brothers or different male-presence conditions.

Experimental unit: Female or mating treatment unit

Endpoints: ovarian maturation, egg carotenoids, cholesterol, energy content.

Claim boundary

What it can support: Relatedness changed selected reproductive timing and egg-composition outcomes under this protocol.

What it cannot support: These internal measures cannot diagnose an unseen home colony or prove commercial sources are related.

Publication status audit

Canonical DOI outside query result

The record has a canonical DOI but did not appear in the broad Neocaridina query. It requires DOI-specific or alternative-registry status review before any no-update statement.

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.

  • breeding 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.
  • genetics 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.
  • breeding practical guide Practical guide
    The guide uses this evidence record and its practical wording must remain inside the revised source boundary.
  • genetics 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.

Inspect the corpus-wide propagation audit.

How this record is classified

Controlled experiment: An assigned treatment or controlled comparison. The treatment, unit, duration and endpoint still limit the claim.

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

Topics: Genetics, Breeding

Critically appraise this source without a score

These questions fit this record's controlled experiment 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. Treatment assignment: Were independent units assigned to treatments, and were baseline conditions comparable? Unclear allocation or baseline imbalance can confound the treatment comparison.
  8. Replication: Were treatment vessels or other exposure units independently replicated rather than subsampled? Repeated animals or assays inside one exposure unit do not replicate the environmental treatment.
  9. Exposure verification: Was the treatment, dose, feed intake or environmental exposure measured and maintained as described? Nominal treatment labels may not equal the exposure animals actually received.
  10. Analysis: Did the statistical model match the unit, repeated measures, multiplicity and missing outcomes? A precise p-value cannot repair a mismatched unit or unaccounted comparison structure.

Read the complete appraisal framework.

Where it is used

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