Those eggs that successfully hatch to "alevin" stage continue to grow, and then emerge from the gravel as "fry." Fry become subjected to a whole new batch of obstacles and predators, since salmon at this stage are near the bottom of the food chain. Pink and chum salmon juveniles head out to sea immediately. The other species may spend as many as two years in freshwater before they head out to sea. During times of these seaward migrations you can find corresponding concentrations of predators, such as beluga whales, Arctic terns, gulls, and other fish species..
Credits: U.S. Fish and Wildlife Service |