[env-trinity] (no subject)

[Tom Stokely]

Trinity River Restoration Program
  · Concerning news of spring chinook infected with columnaris, aka gill rot have been reported at higher rates than years prior and has the attention of agencies, anglers and those on the river. Although the average rates and the location of these reports have been concerning, some daily rates of reported infections have been alarming and have definitely garnered the attention of regulatory agencies. The evidence of disease is somewhat surprising because upper river temperatures are not exceptionally high (yet). A key differentiating factor speculated by fish biologists, is that the heavy sediment and ash loads from thunderstorms in June may have damaged the gills of the spring chinook that were making their way upriver at that time, stressing them and thus making them vulnerable to disease. It is helpful to know that there is an advisory group that meets every other week to discuss Trinity & Klamath River conditions and would recommend FAR action if conditions deteriorate. The Klamath Flow Augmentations Releases (FARs) are meant to protect migrating salmon in the summer and fall months, when conditions can become poor in the lower Klamath River. The flows, water temperature, fish observations, and disease rates are all monitored using data collected by the California Department of Fish and Wildlife (CDFW) to determine if a FAR recommendation is needed. [Photo Credit: Charlie Holthaus, North Fork Trinity Confluence with the Trinity River on June 13, 2023]

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