Redoubt Lake Russian America. The Russians established a small settlement near the lake's outlet known variously as Ozersk Redoubt, Ozyorsk Redoubt, The Redoubt, Seleniye Dranishnikova, or Dranishnikov Settlement. Salmon traps were set in the lake and the catch was salted and dried at Ozersk Redoubt. Between 1817 and 1832 the Russians at Sitka and Ozersk Redoubt salted an average of 20,000 salmon annually. Fish harvests by the Russians at Redoubt Lake sometimes exceeded 50,000 sockeye salmon per year. Annual escapements possibly exceeded 100,000 sockeye. In the 1980s, sockeye escapement or returns of adult fish had declined to an average less than 10,000
Kokanee salmon of landlocked sockeye has occurred more than once with different kokanee populations, showing genetic differences between populations. Most evidence points to events that land-locked the lake-type sockeye (which spawns in streams and lakes, rather than tributaries like the sea-type sockeye, but is still anadromous and spends most of its adult life out at sea), which evolved into the non-anadromous form. Genetic evidence from kokanee in the Fraser River drainage and Columbia River drainage shows that ancestors of the kokanee came from the lake-type sockeye. The data also suggests that the kokanee may have evolved back into a lake-type anadromous form