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Herring
Herring were smaller, oilier than cod—characteristics that complicated preservation but did not prevent it. The higher fat content meant herring could not be simply air-dried like cod—fat turned rancid, creating unpalatable, potentially dangerous product.
Instead, herring were heavily salted. Freshly caught fish were gutted and packed in barrels with layers of salt between layers of fish. The salt preserved by creating environment hostile to bacterial growth and by extracting moisture. Properly salted herring lasted months, providing important protein source different from dried cod.
Smoked herring was alternative preservation method. The fish were hung in smokehouses, exposed to cool smoke for extended periods. The smoking preserved through combination of moisture removal, surface drying, and deposit of antibacterial compounds from smoke. Smoked herring had distinctive flavor and longer storage life than fresh fish though not as long as heavily salted herring.
Salmon
Salmon were prized but challenging to preserve. The rich, fatty flesh resisted drying, tended toward rancidity. Still, preservation was possible through careful technique.
Salmon were split open, most bones removed, flesh scored to increase surface area and promote moisture evaporation. The prepared fish were lightly salted—enough to aid preservation without overwhelming salmon’s delicate flavor—then slowly smoked. The process took days, required constant attention to smoke level and temperature, resulted in product that combined smoking’s preservation benefits with salmon’s characteristic richness.
Alternatively, salmon could be heavily salted like herring—less elegant solution but more reliable in terms of storage life and less demanding of specialized equipment and constant attention.
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