The Borlaug Scholar Field Notes. Sardines.
Four published Field Notes. Four operational decoders. One reference atlas. The Borlaug method, demonstrated on one global food system in detail.
This is the sardines subject of the Borlaug Scholar Field Notes series. A global-industry case study that runs the same structural method the cultural-analysis line uses, applied here to one tractable food system in detail. A single can on a shelf in Doha, Lagos, Manila, or San Francisco passes through twenty regulatory regimes, four publicly listed companies, a private ownership layer larger than the public one, and roughly 2,400 years of preservation history. This subject reads each layer in turn, with explicit evidence-confidence levels stated throughout. Each Field Note is paired with an operational decoder so that any reader can audit the can in their hand.
The subject · in four numbers
23
Sardine species permitted on a label under Codex CXS 94-1981
20
Sardine-producing countries mapped across the regulatory ladder
4
Listed companies that surface as clean public-equity proxies for the industry
~2,400
Years between earliest fish-salting attestations and the can on a 2026 shelf
Across the twenty mapped countries, only four publicly listed companies surface as clean public-equity proxies for the canned-sardine industry, namely Thai Union Group on the SET, Century Pacific Food on the PSE, Oceana Group on the JSE, and Unimer Group on the BVC. Beyond those four, the private ownership layer is, by several measures, larger than the public one. The Codex Alimentarius lists 23 sardine species; the European Union reserves the bare unqualified word “Sardines” for one of them, namely Sardina pilchardus.
This series does not tell readers what to eat. It tells readers what their cans are made of, who owns the brand, what regulatory regime the can comes from, and what tradition the fish belongs to. The structural diagnosis comes first. The buying decision is the reader’s.
Independent · No Brand Sponsorship
Authored by Kerim Demirkol, a Borlaug Scholar through the inaugural World Food Prize and Wageningen Youth Institute. Not sponsored by, paid for by, or affiliated with any food brand, retailer, exchange, or industry association. The author holds no positions in any company named in any Field Note or decoder, and has no commercial relationship with any company in the series database.
Every record in every decoder carries an explicit evidence-confidence level. Every claim in every Field Note is sourced. The audit happens entirely in the reader’s browser; nothing is stored, no email is required, and no tracking pixels are loaded.
Four published Field Notes, one anchor frame.
Each Field Note opens with a question a label cannot answer on its own. Each one closes by extending the anchor sentence by one verb. The sentence grows as the series grows.
Five layers, one can.
Every can on every shelf can be read as a five-layer document. Each layer has its own operational decoder. Layer 3, the country and regulatory layer, is the cross-cutting reference atlas that all five decoders consult.
The Five-Layer Audit
A reader who finishes a Field Note can immediately audit the can in their own hand.
- Front of pack. What words is the can selling? What story does the front-of-pack design tell? Health Premium Decoder
- Back of pack. Sodium per serving, protein per gram, packing medium. What is the gap between the front-of-pack claim and the nutrition-facts math? Health-Washing Decoder
- Country of regulation. What regulatory regime does this can come from? What tier on the world’s twenty-country ladder of canning tradition does it sit on? Global Sardine Standard Map · the cross-cutting reference atlas
- Equity register. Who owns the brand? Where is the parent company headquartered? Is the parent listed on a stock exchange or held privately? Brand Owner Decoder
- Preservation history. What food tradition does the fish belong to? How old is the canning industry that produced it? What labour history sits behind the cannery floor? Preservation Timeline
Four operational decoders. One reference atlas.
Each tool runs entirely in the reader’s browser. Nothing is stored. No email is required. No tracking pixels are loaded.
How every record is sourced.
Evidence-confidence levels
Every record in every decoder carries an explicit evidence-confidence level. The reader sees a coloured pill on every record so that a Strong record is never confused with a Preliminary one.
Strong is reserved for primary historical sources, dated artefacts, audited financial filings, and named acquisitions on the public record. Moderate is used for industry-history references, corporate-heritage materials, and disclosures from privately held companies. Preliminary is used for unaudited industry estimates and contested attributions; the reader is invited to consult the named sources directly before drawing strong conclusions.
No claim in this series is presented at higher confidence than its underlying evidence supports. Where the evidence is genuinely thin, the claim is flagged as Preliminary and the reader is told so. The series prefers a smaller set of well-evidenced claims to a larger set of confidently-stated ones.
The other subject in the series
The Borlaug Scholar Field Notes also runs a sibling line of work that descends directly from the 2022 paper, namely the cultural-analysis line on Filipino food systems. That subject hub is anchored by the April 2026 Revised Paper on obesity and food insecurity in the Philippines, alongside the Borlaug Forward companion essay, the Same System, Two Countries bridge case note, the action ladder, and the supporting essay cluster. Both subjects apply the same structural method, namely diagnose the system rather than the consumer, locate the writer rather than pretend to be from nowhere, and name the evidence-confidence level of every claim.
Read the April 2026 Revised Paper → · The Filipino food systems subject hub → · ↑ The series hub
Read the can. Name the premium.
Trace the equity. Remember the centuries.