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Has a replicated known-hatch Neocaridina cohort been followed through individual deaths in home-like aquaria?
This record shows how a current Neocaridina evidence gap was searched. It supports a dated statement about this search, not proof that no unlocated study exists.
- Reviewed
- August 12, 2026
- Next review
- February 12, 2027
- Candidate decisions
- 6
- Governed gaps
- 1
Search scope
Taxon names: Neocaridina davidi, Neocaridina heteropoda, Neocaridina denticulata sinensis.
Concepts: lifespan, longevity, known hatch, individual survival, cohort.
Search surfaces: publisher and DOI records, scholarly web indexes, full-text repositories.
Exact queries
"Neocaridina davidi" individual lifespan laboratory hatch death"Neocaridina heteropoda" longevity lifespan aquarium studyNeocaridina known-hatch cohort survival lifespan"Neocaridina heteropoda" sexual maturity age aquarium"Neocaridina denticulata" life cycle aquarium 75 days
Candidate-source decisions
Life-history traits and ecological characteristics of the ornamental shrimp Neocaridina denticulata, recently introduced into the freshwater systems of Israel
Tracks 18 known-hatch animals for molt and growth observations, but losses and stopping rules prevent a complete lifespan distribution.
Life history of an invasive freshwater shrimp Neocaridina davidi in the Tomoe River
Infers lifespan from field size-frequency cohorts rather than following identified animals from hatch to death.
Population dynamics of Neocaridina davidi in the thermally polluted Gillbach stream
Provides field estimates and a reported laboratory maximum, not a replicated individual aquarium survival distribution.
The lifecycle of Neocaridina denticulata and N. palmata in aquariums
Reports an aquarium life-stage sequence, but one initial tank per market label, unclear offspring allocation, missing survival denominators and inconsistent tables prevent a universal 75-day maturity calendar or lifespan inference.
Estimation of the size of sexual maturity in reproducers of Neocaridina heteropoda under laboratory conditions
Begins with selected adult broodstock and does not document the F1 hatch or age-assignment method needed to validate its reported maturity weeks.
Ageing the unageable: investigating novel methods of ageing crustaceans
Uses bounded-age aquarium cohorts to test two molecular markers, but it is cross-sectional, samples one selected cohort tank per age group, follows no individual to death and cites rather than measures the approximate 13-month lifespan used to describe sampling coverage.
Search outcome
The review now includes an open known-age-cohort thesis that rules out two simple molecular age markers under its protocols. It does not supply a lifespan distribution because no animal was followed to death and the approximate 13-month value was cited from another source. The lifespan gap remains open.
Knowledge gaps governed by this search
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Submit a stable source, missed search surface or correction. A candidate is not added to biological evidence until its methods and claim boundary pass review.