Claim

In the first few generations after tsunami-induced hybridization, Gasterosteus nipponicus alleles were purged at major loci associated with reproductive isolation, including ancestral-X and neo-X chromosomes.

Type OBSERVATIONAL · truth-evaluable: yes · status at snapshot: ACTIVE · created seq 17789 · qualifiers {"location":"Tohoku Region, Japan.","population":"A tsunami-induced hybrid stickleback population.","time_range":"The first few generations after the 11 March 2011 tsunami."}

a comma-separated series may list several propositions

Referenced 99 times: checked 2, looked up by assistants 0, viewed 65, shared 32. A count of attention, not evidence.

Topics

Biology · 1efd24fe Wildlife · 1efd24fe

Assessment

Supported

Score: 0.9781 under ledger-default@0.3.0 at snapshot 27745

2 of 4 review checks done · 1 counted · 1 by the author only

2 independent evidence lineages · review checks 1 of 4 · stability HIGH

Main unresolved issue: 3 counted evidence items have no independence review; repeats of one origin may be counted as several coverage:57c6cbb0-4ed0-80d5-8a2d-038922a42931

Not yet independently audited.Evidence reviewed so far supports this claim, but only 1 of 4 review checks has been done.A quoted passage from phys.org was not found on the page when Galedra fetched it.

Why?

Strongest counted support: The abstract reports early purging of marine alleles at ancestral-X and neo-X reproductive-isolation loci. weight 2.000000 evidence

Suppressed as dependent: The quoted passage directly reports purging of G. nipponicus alleles within the first few generations at ancestral-X and neo-X reproductive-isolation loci.

Review gaps: qualifiers reviewed, opposing search done, independence reviewed

What would most change this: One independent, direct measurement that contradicts this claim would move it from Supported to Supported.

Hide calculation

0.9781 under ledger-default@0.3.0 at snapshot 27745 · state Supported · Review checks: 1 of 4 · stability HIGH · 3 sources, 2 independent lineages

Model ledger-default@0.3.0 (the default model, not the answer) · snapshot 27745 · trace sha256:441fd410d0464f061add11bde82cb81da8e2c2bb6b0a5f2a1698e09809644ab7

Last changed at entry seq 25818; nothing logged since has borne on this claim.

How the number was reached

Each counted link is weighed by multiplying the factors the model declares; a factor it does not declare is not shown. Every factor name below links to what that number means.

Link	Working	Weight	Counted as
12ca5d11 support	relevance DIRECT 2.0 × observation MEASUREMENT 1.0 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	2.000000	2.000000
2ab475c1 support	relevance DIRECT 2.0 × observation DIRECT_TEXT 0.9 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	1.800000	0.000000 (dependent strongest only, kept 12ca5d11)
afe8e3d7 support	relevance DIRECT 2.0 × observation DIRECT_TEXT 0.9 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	1.800000	1.800000

prior 0.50 → log-odds 0.000000 + 3.800000 (the counted weights) = 3.800000 → probability 0.9781

Under neighbouring settings of the same model: 0.9346 to 0.9929, a spread of 0.0583.

Half-even rounding, six places for weights and four for the probability. The same inputs under the same model reproduce this exactly; that is what the trace hash above is for. How a score is worked out explains every factor, why it is there, and what the model sets it to.

Your view

Registered views

Nobody has registered a view yet.

Registered views are personal belief, not evidence: they never change Galedra's assessment. Affiliations are self-declared and shown only for groups of 5 or more.

Checked as part of

Statements this claim was broken out of. The claim is scored on its own; a statement's reading only counts its claims.

“In the first few generations after tsunami-induced hybridization, Gasterosteus nipponicus alleles were purged at major loci associated with reproductive...” · 1 claim · 29 September 2026
“A nine-year genomic study of tsunami-induced stickleback hybridization in Japan found rapid genome-wide purging within a few generations, including loss of...” · 2 claims · 29 September 2026

Evidence for

The abstract reports early purging of marine alleles at ancestral-X and neo-X reproductive-isolation loci.

From Rapid genome-wide purging following tsunami-induced hybridization in a stickleback population Read 2026-09-29 Relevance DIRECT Steps 0 Counted
Phys.org reports especially rapid decline of marine ancestry at loci tied to freshwater adaptation, migration, mate choice, and hybrid male sterility.

From Japan's 2011 tsunami sparked fish hybridization, but species boundaries largely held Read 2026-09-29 Relevance DIRECT Steps 0 Counted

Independent secondary report corroborates the new claim; it traces the same study origin.
The quoted passage directly reports purging of G. nipponicus alleles within the first few generations at ancestral-X and neo-X reproductive-isolation loci.

From Rapid genome-wide purging following tsunami-induced hybridization in a stickleback population Read 2026-09-29 Relevance DIRECT Steps 0 Counted

The excerpt states timing, allele identity, and both named chromosome loci.

Evidence against

None.

Qualifications

None.

Suppressed as dependent

Evidence	Group	Kept instead
831d0dbe		12ca5d11

Inferences

Concluded from

None.

Used as a premise in

None.

An inference is interpretation, not evidence: it never changes the assessment of its conclusion. Each premise is a claim with its own evidence.

Threads

None. Threads are for disagreements about how a determination was made — a statement whose figures are not in the passage it rests on, two sources that may share an origin. Something about the world belongs in the evidence above.

Claim edges

None. Edges are stored and displayed; v0.1 does not propagate probability across them.

Review checklist

Review checks: 1 of 4

2 checks by this claim's own author, alongside the independent review above. 1 QUALIFIER CHECK · 1 EVIDENCE VERIFICATION. A check by the person who recorded a claim does not raise its review coverage.

Check	Done	By
qualifiers reviewed	no
opposing search done	no
independence reviewed	no
primary source reviewed	yes	12ca5d11, 2ab475c1

Summary

Supported. The main support is: The abstract reports early purging of marine alleles at ancestral-X and neo-X reproductive-isolation loci. 67e282aa

1 further item repeats the same origin and is not independent evidence. 831d0dbe

Review checks: 1 of 4. coverage:57c6cbb0-4ed0-80d5-8a2d-038922a42931

Generated by stub-v0.1; every sentence cites graph ids.

Contribution history

seq	event	detail
17789	APPENDED
17790	ACCEPT	AUTOMATIC_AFTER_VALIDATION
17799	LINK_EVIDENCE	by 1efd24fe (accepted)
17878	LINK_EVIDENCE	by 1efd24fe (accepted)
24682	TASK_RESULT	by 1efd24fe (accepted)

Score trace

{
  "claim": "57c6cbb0-4ed0-80d5-8a2d-038922a42931",
  "links": [
    {
      "link": "10f51e77-834f-8f37-baf3-03db12ca5d11",
      "group": null,
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "0230ed2d-d9f4-870e-b905-4ae567e282aa",
      "direction": "SUPPORT",
      "magnitude": "2.000000",
      "relevance": "DIRECT",
      "extraction": "UNVERIFIED",
      "provenance": "INDEPENDENT",
      "observation": "MEASUREMENT",
      "source_type": "PRIMARY_TEXT",
      "authenticity": "UNVERIFIED",
      "audit_confirmed": false,
      "effective_weight": "2.000000",
      "interpretive_steps": 0
    },
    {
      "kept": "10f51e77-834f-8f37-baf3-03db12ca5d11",
      "link": "b223e402-70e3-89c6-9f7a-bb1c2ab475c1",
      "group": null,
      "reason": "dependent_strongest_only",
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "c5e2e3b0-f0d7-8ae6-8580-d29a831d0dbe",
      "direction": "SUPPORT",
      "magnitude": "1.800000",
      "relevance": "DIRECT",
      "extraction": "UNVERIFIED",
      "provenance": "INDEPENDENT",
      "observation": "DIRECT_TEXT",
      "source_type": "PRIMARY_TEXT",
      "authenticity": "UNVERIFIED",
      "audit_confirmed": false,
      "effective_weight": "0.000000",
      "interpretive_steps": 0
    },
    {
      "link": "eac47910-4fa0-88ea-8372-cedaafe8e3d7",
      "group": null,
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "60d7a711-8df9-868c-96ab-c5c534fb4a23",
      "direction": "SUPPORT",
      "magnitude": "1.800000",
      "relevance": "DIRECT",
      "extraction": "UNVERIFIED",
      "provenance": "INDEPENDENT",
      "observation": "DIRECT_TEXT",
      "source_type": "SECONDARY_TEXT",
      "authenticity": "UNVERIFIED",
      "audit_confirmed": false,
      "effective_weight": "1.800000",
      "interpretive_steps": 0
    }
  ],
  "model": "ledger-default@0.3.0",
  "prior": "0.50",
  "variants": {
    "spread": "0.0583",
    "permissive": "0.9929",
    "conservative": "0.9346"
  },
  "code_hash": "sha256:c61a6fdf35a754a0d7e958df149036a083c0eaeb7d2d2e52704ec32b0c36def7",
  "contested": false,
  "stability": "HIGH",
  "claim_type": "OBSERVATIONAL",
  "config_hash": "sha256:86768038080b8ab5233f1e4b7aba10af05b5bb44caa432095150b90e81209809",
  "probability": "0.9781",
  "provisional": true,
  "evidence_sum": "3.800000",
  "snapshot_seq": 25818,
  "prior_log_odds": "0.000000",
  "support_groups": 2,
  "model_dependent": false,
  "review_coverage": "0.25",
  "truth_evaluable": true,
  "assessment_state": "SUPPORTED",
  "review_checklist": {
    "qualifiers_reviewed": {
      "by": [],
      "ok": false
    },
    "opposing_search_done": {
      "by": [],
      "ok": false
    },
    "independence_reviewed": {
      "by": [],
      "ok": false
    },
    "primary_source_reviewed": {
      "by": [
        "10f51e77-834f-8f37-baf3-03db12ca5d11",
        "b223e402-70e3-89c6-9f7a-bb1c2ab475c1"
      ],
      "ok": true
    }
  },
  "contradict_groups": 0,
  "rounding_boundary": false,
  "posterior_log_odds": "3.800000",
  "not_applicable_reason": null,
  "independence_unreviewed": 3
}