Which location, outside the native Pacific range, had documented White Sturgeon stockings starting around 1967 where reproduction evidence is lacking?
Answer
The Colorado River, including Lake Havasu on the Arizona/California border.
Multiple documented attempts to establish White Sturgeon populations outside their native range, often linked to aquaculture or stocking programs, have generally failed to create self-sustaining groups. A notable example involves stockings initiated around 1967 in the Colorado River system, specifically within Lake Havasu, which lies on the border between Arizona and California. Despite these earlier introduction efforts, the current status of that population remains uncertain, and critically, there has been no detected evidence confirming that reproduction has successfully occurred in that non-native environment.
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