Migration Ecology of Green Sturgeon

The green sturgeon (Acipenser medirostris) is an anadromous fish species whose life history encompasses long‐distance movements between coastal marine environments and natal freshwater rivers. Adults undertake spring upriver migrations to spawning grounds characterised by deep, cool channels and gravel substrates, while juveniles rear for several years within estuarine and deltaic habitats before initiating seaward migration. Migration timing exhibits both population‐level synchrony and individual variation, with some fish departing early in summer and others delaying exit until late autumn. Environmental cues such as river discharge and temperature modulate the onset of both upriver and downriver movements. In marine settings, green sturgeon frequent areas of complex seafloor topography at depths of 20–60 metres and temperatures of 9.5–16 °C, likely reflecting prey availability and predator avoidance. Fidelity to natal rivers and specific coastal overwintering grounds underscores the species’ reliance on habitat connectivity. Insights into migration patterns across life stages underpin spatial planning, fisheries management and conservation efforts aimed at mitigating threats from habitat alteration, water withdrawals and climate‐driven changes in flow regimes.

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Migration Ecology of Green Sturgeon publication trend

The graph below shows the total number of articles in migration ecology of green sturgeon across all publications each year (not limited to Nature Index journals).

Technical terms

Anadromous: A life‐history strategy in which fish migrate from marine to freshwater environments to spawn.

Biotelemetry: The remote monitoring of animal movements and behaviour using electronic tags.

Rheotaxis: The orientation or movement of an organism in response to water currents.

Spawning migration: The directed movement of adult fish from feeding grounds to reproductive sites.

References

1. Green Sturgeon Physical Habitat Use in the Coastal Pacific Ocean. PLOS ONE (2011).
2. Intraspecific variation in migration timing of green sturgeon in the Sacramento River system. Ecosphere (2022).
3. Movement patterns of juvenile green sturgeon (Acipenser medirostris) in the San Francisco Bay Estuary. Environmental Biology of Fishes (2022).