Pith Number

pith:YTBBOFGI

pith:2026:YTBBOFGIESOH6JHBJKE33XHHCF

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Multiple timescales in collective motion: daily and intraday upstream fish migration focusing on Feller condition

Hidekazu Yoshioka

Daily fish migration is less randomized and intermittent than intraday migration according to the Feller condition on diffusion bridges.

arxiv:2602.06606 v2 · 2026-02-06 · q-bio.PE · math.DS

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\pithnumber{YTBBOFGIESOH6JHBJKE33XHHCF}

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Record completeness

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2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

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The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Claims

C1strongest claim

The daily and intraday fish count data correspond to distinctive Feller indices, showing that the former is qualitatively less randomized and intermittent.

C2weakest assumption

That the time-dependent parameterized average and variance curves fitted to fish count data correctly capture the true drift and diffusion coefficients of the underlying migration process, and that the Feller condition on those coefficients directly determines the qualitative intermittency of sample paths.

C3one line summary

Diffusion bridges fitted to Ayu fish counts show daily migration is less randomized and intermittent than intraday migration via distinct Feller indices.

References

71 extracted · 71 resolved · 0 Pith anchors

[1] Evolutionary game theory and the adaptive dynamics approach: adaptation where individuals interact 2020 · doi:10.1098/rstb.2019.0377

[2] Ridgway, W. J., Dalwadi, M. P., Pearce, P., & Chapman, S. J. (2023). Motility -induced phase separation mediated by bacterial quorum sensing. Physical review letters, 131(22), 228302. https://doi.org/ 2023 · doi:10.1103/physrevlett.131.228302

[3] Smith, A., Ghosh, D., Tan, A., Cheng, X., & Daoutidis, P. (2025-1). Multi-scale causality in active matter. Computers & Chemical Engineering, 197, 109052. https://doi.org/10.1016/j.compchemeng.2025.10 2025 · doi:10.1016/j.compchemeng.2025.109052

[4] K., & Haest, B 2024 · doi:10.1186/s40462-024-00496-4

[5] Kumar, S., Kler, T. K., Sekhon, G. S., & Sahni, T. (2024). Impacts on avian migratory patterns due to climate change and hormonal disruption: a review. Mitigation and Adaptation Strategies for Global 2024 · doi:10.1007/s11027-024-

Formal links

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Receipt and verification

First computed	2026-05-29T01:04:36.844298Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c4c21714c8249c7f24e14a89bddce711612407f882f5a232e332a484aa4e95ba

Aliases

arxiv: 2602.06606 · arxiv_version: 2602.06606v2 · doi: 10.48550/arxiv.2602.06606 · pith_short_12: YTBBOFGIESOH · pith_short_16: YTBBOFGIESOH6JHB · pith_short_8: YTBBOFGI

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/YTBBOFGIESOH6JHBJKE33XHHCF \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: c4c21714c8249c7f24e14a89bddce711612407f882f5a232e332a484aa4e95ba

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "97a22fafa1a0a0962cef9ed9e03df7d4718161aedbd49ce900bf5812ad1f795b",
    "cross_cats_sorted": [
      "math.DS"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "q-bio.PE",
    "submitted_at": "2026-02-06T11:09:00Z",
    "title_canon_sha256": "e82f3346e6025cde42829d0e3f6cb71b88a5c7c54662a4cbef7b9aaa5889f1c2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2602.06606",
    "kind": "arxiv",
    "version": 2
  }
}