National Geographic : 1939 Feb
FRESH-WATER DENIZENS OF THE FAR WEST © National Geographic Society Painting by lHashime Murayama TO REACH THE SHALLOW HEADWATERS. SALMON OFTEN MUST CLIMB CASCADES Costly fishways preserve for them an all-water route to upper reaches of many rivers blocked by dams. Sometime between the third and seventh years of their life, and between March and November, most salmon swarm back to fresh water to reproduce. This RED SALMON (Oncorhynchus nerka) differs from its kin, since it spawns in streams tributary to lakes. Soon after emerging from the eggs, the young move down to the lakes for a one-to-three-year stopover before going to sea. This species is much sought after because, when canned, its flesh is deep red and especially flavorous.