Evidence of spawning by green sturgeon, Acipenser medirostris, in the upper Sacramento River, California

  • Brown K
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Abstract

This study reports the only direct evidence of spawning of green sturgeon, Acipenser medirostris, in the upper Sacramento River, CA. Two green sturgeon eggs were collected with substrate mats immediately below Red Bluff Diversion Dam. One green sturgeon larva was collected with a larval net at Bend Bridge. We concluded that green sturgeon spawn in the upper Sacramento River, both above and below RBDD. Temperature ranges in the study area (10–15°C) are similar to conditions used in successful artificial rearing of green sturgeon and do not appear to be a limiting factor to successful spawning of green sturgeon; however, suitable habitat upstream of RBDD is inaccessible when dam gates are lowered.

Author-supplied keywords

  • Artificial substrates
  • Larval nets
  • Migration
  • Red Bluff Diversion Dam
  • Rotary-screw traps

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Authors

  • Kurtis Brown

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