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Named evidence gapWhat dissolved-oxygen histories change survival, behaviour, growth or reproduction?
A precise unanswered question is part of the source of truth. It prevents an absent study, indirect result or popular rule from becoming false certainty.
This is a current search boundary, not proof that no study exists. The dated searches below show what was checked, which candidates were included or excluded and what evidence would change the answer.
Current boundary
Occurrence values and study culture conditions are not tested chronic oxygen limits.
What would answer it
Replicated oxygen treatments with continuous traces, temperature and life-stage controls, including recovery and sublethal endpoints.
Answerability brief
Dedicated controlled research is required
The question requires assigned treatments, independently replicated systems, controlled comparisons and measured exposures or conditions.
Decision at stake: Which oxygen histories require aeration, flow or emergency intervention for a defined life stage and temperature.
Primary endpoint: Survival and reproductive completion, with behavior, growth and recovery analyzed separately.
Minimum design: Assigned oxygen treatments in independently replicated systems with continuous or sufficiently dense traces, controlled temperature and biomass, multiple life stages and a planned recovery phase.
Required reporting: Calibrated oxygen method, complete time series, temperature, pressure or saturation basis, flow, surface exchange, biomass, density, feeding, allocation, vessel denominators, animal denominators and censored outcomes.
Community can contribute: Repeated calibrated oxygen traces paired with time-stamped observations can reveal realistic events and help define experimental histories.
Community observations cannot establish: One spot reading or an animal at the surface cannot diagnose oxygen causation or establish a chronic threshold.
Closure rule: The gap narrows only for the tested temperature, life stage, duration and endpoint after replicated oxygen histories and recovery outcomes are available.
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Current research allocation
Qualified collaboration required
The current publisher cannot answer this alone. Work waits for suitable facilities, expertise, oversight and independently replicated units.
Why this allocation: Causal oxygen boundaries require assigned and measured histories across temperature and life stage, not surface behavior or one spot measurement.
Next permitted unit: Define the smallest reviewable oxygen time-series and recovery design for discussion with an aquatic physiology collaborator.
Activation trigger: A partner can control oxygen histories, measure continuous exposure and maintain independently replicated aquarium units.
Stop decision: Stop the pass when candidate evidence lacks exposure traces, independent units or animal outcomes beyond short behavior.
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Reviewed: August 12, 2026.
Topics: Filtration, Behaviour, Health, Breeding
Practical guides governed by this gap
Reproducible search trail
Which dissolved-oxygen histories change Neocaridina survival, behaviour, growth or reproduction?
Taxon names: Neocaridina davidi, Neocaridina heteropoda, Neocaridina denticulata sinensis.
Concepts: dissolved oxygen, hypoxia, oxygen exposure, survival, reproduction.
Search surfaces: publisher and DOI records, PubMed, scholarly web indexes.
Outcome: A direct HIF-1alpha embryo knockdown study adds a molecular cleavage result but assigned no oxygen treatment and measured no dissolved oxygen. No controlled dissolved-oxygen treatment series establishing survival, growth or reproduction limits was located. The gap remains open.
Exact queries and candidate decisions
Exact queries
Neocaridina davidi dissolved oxygen hypoxia experiment survival reproduction"Neocaridina heteropoda" hypoxia oxygen"Neocaridina denticulata sinensis" hypoxia dissolved oxygensite:pubmed.ncbi.nlm.nih.gov Neocaridina hypoxia oxygen
Candidate sources
- Investigating the Expression and Function of HIF-1alpha in Neocaridina davidi During Embryo Cleavage Stage: included. Included as direct embryo gene-knockdown evidence, but it assigned no oxygen treatment and reported no dissolved-oxygen measurement, survival curve or reproductive oxygen endpoint.
- An ecophysiological approach to improving health outcomes of ornamental shrimp during aquarium trade and transportation: included. Useful review of oxygen and transport gaps, but not an assigned chronic oxygen experiment.
Next scheduled search: February 12, 2027. Also governs: dissolved-oxygen
Help close or refine this gap
Submit a stable source or correction. A title, abstract or community consensus does not close the gap until its methods and claim boundary are reviewed.