Green Sturgeon

Green sturgeon are an anadromous species, meaning they can live in both fresh and saltwater. From late-spring to autumn, they migrate from nearshore marine environments into coastal bays and estuaries of the West Coast. Spawning adults migrate to natal rivers in the winter and early spring to spawn from April to July. Females release eggs, which are sticky and adhere to the rocky bottom. Eggs hatch within 10 days.

Juveniles remain in the river for up to one year, then live in estuaries for up to four years before entering the marine environment. Subadults and adults remain in nearshore marine environments, coastal bays and estuaries.

There are two genetically identifiable populations, or Distinct Population Segments, of green sturgeon. The southern designated population segment (SDPS) spawns in California within the Sacramento River watershed and is found in the San Francisco Estuary. The northern designated population segment (NDPS) migrates to the Klamath river in northern California and the Rogue river in Oregon to spawn.

Unlike salmon, green sturgeon spawn several times during their long lives, returning to their natal rivers every 3 to 5 years. Green sturgeon reach maturity around age 15. They can live up to 60 to 70 years!