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South Delta Salmon Trap

Posted on May 5, 2019 by Tom Cannon

Unless there are high Delta inflows, south Delta export pumping creates a hydrologic “trap” for emigrating salmon and other Delta fishes. Even under moderate Delta inflows and outflows, as occurred in January 2019 (Figure 1), south Delta pumping traps salmon … Continue reading →

Posted in Bay-Delta, Chinook Salmon

The Delta as Salmon Nursery

Posted on November 17, 2020 by Tom Cannon

The Delta is an important nursery area for Central Valley Salmon. This fact continues to be ignored or under-appreciated. The phenomenon is fully consistent with the general science on salmon in their southern range in the eastern Pacific. Nearly all … Continue reading →

Posted in Bay-Delta, Chinook Salmon

A Month of High Exports Pulls Salmon and Smelt to Delta Pumps

Posted on April 22, 2020 by Tom Cannon

Increased Delta exports by the federal Bureau of Reclamation in early April resulted in increased salvage of salmon and longfin smelt at the Central Valley Project’s south Delta Tracy Pumping Plant. Salmon smolts salvaged were predominately from the San Joaquin … Continue reading →

Posted in Bay-Delta, Chinook Salmon, Smelt

Delta Exports Reduced in Winter 2020 to Protect Salmon and Smelt

Posted on March 18, 2020 by Tom Cannon

One of the ramifications of dry conditions in winter 2020 has been the need to cut Delta exports to protect salmon and smelt listed under the state and federal endangered species acts. Lack of rain has led to reduced Delta … Continue reading →

Posted in Bay-Delta, Smelt

The Importance of the Bay-Delta Estuary to the Recovery of Wild Chinook Salmon

Posted on April 23, 2019 by Tom Cannon

Common sense says salmon recovery efforts should focus on the most important factors that control fish population dynamics. In reviewing Central Valley population dynamics, I have seen each life stage and each individual controlling factor become important at one time … Continue reading →

Posted in Bay-Delta, Chinook Salmon

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