Hood Canal hatchery chum are genetically predominately HC chum. I don't think enough outside chum were ever introduced to cause any genetic shift in the chum population. Hatchery coho are a combination of local HC stock, plus other Puget Sound stocks imported from time to time, mainly Green River. There may be endemic historic HC genetic material in the coho population, especially fish that have markedly different run timing than the main hatchery population.

Except for the Dungeness spring chinook, the rest of the HC chinook population is genetically linked to outside hatchery chinook populations. Quilcene obtained spring chinook broodstock from numerous sources to augment the native stock, diluting if not eliminating the native stock. Green River fall chinook are the most abundant and common chinook in HC, both in hatcheries and spawning naturally. Native Skokomish spring and fall chinook were extirpated decades ago.

Hood Canal is a textbook case for how to destroy wild salmon populations with hatcheries and hatchery harvest rates on wild stocks.

Sg