[env-trinity] 2024/25 CDFW Trinity River Project trapping summary through Julian week 35 (September 2)

[Kier, Mary Claire@Wildlife]

Greetings!
Attached please find the TRP trapping summary through JW 35 (Sep 2).

Here's some stuff of which you need to be aware...

  *   We normally close our traps before sunset and trap fish overnight, working them up the next morning, and then, if all is well, throughout the morning for an early afternoon work-up too.
  *   The water temperature in the lower Trinity (where the Willow Creek weir is located) has been elevated this past week. Our upper water temperature threshold for trapping is 70°F or 21°C, which has precluded us from trapping overnight every night..
  *   Because the evening water temperatures have been too high to trap, our crew has been checking water temperature upstream of the trap every morning, and if it has been under those upper temperature thresholds, they have been setting the trap for a few hours of morning trapping
  *   We love to trap fish (and get tags on them) but we will never trap if that trapping is going to put the fish in danger
  *   We have not had a single tagged fish "wash back" dead this season. We hope to keep it that way...
  *   When the water is warm(er), fish tend to hang in deeper holes/refugia and not move upstream a lot. 'Though the water temperature is far lower in the upper Trinity (where the Junction City weir is located), Fall fish are waiting to move upstream until cooler water entices them upstream.

For those of you who are clued in to WCWs catch numbers from last year, I think we've got the new site dialed in better this year. Fingers crossed (if that's okay to say in SCIENCE)!
Cheers!
MC

******************************************************
Mary Claire Kier
CA Department of Fish and Wildlife - Trinity River Project
Environmental Scientist - Fisheries
(I'm often teleworking, or in the field. Please use my email address if you need to contact me.)
5341 Ericson Way, Arcata CA 95521
******************************************************
Klamath/Trinity Program reports can be found online @
https://nrmsecure.dfg.ca.gov/documents/ContextDocs.aspx?cat=KlamathTrinity
If you'd like to be added to the distribution list of the Trinity River Project's trapping summaries let me know.

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