by Scott | Oct 17, 2012 | Radio-Tagged Trout
Tag Number: #016 Tagged: 10/17/2012 Released: River mile 20.0 Fork Length: 336mm / 13.2″ Species: Rainbow Trout Angler: Arlen Thomason Surgery Specialist: Jeff Ziller,...
by Scott | Oct 17, 2012 | Radio-Tagged Trout
Tag Number: #002 Tagged: 10/17/2012 Released: River mile 22.6 Fork Length: 329mm / 13.0″ Species: Rainbow Trout Angler: Jeff Ziller Surgery Specialist: Jeff Ziller,...
by Scott | Oct 17, 2012 | Radio-Tagged Trout
“Sven” and “Ole” were a package deal – hooked at the same time (!) on a double-fly rig during our sample collection. Tag Number: #021 Tagged: 10/17/2012 Released: River mile 20.0 Fork Length: 304mm / 12.0″ Species: Rainbow Trout Angler: Scott Kinney Surgery Specialist: Jeff Ziller,...
by Scott | Oct 13, 2012 | Radio-Tagged Trout
“Radio,” as he was dubbed by Arlen Thomason and Steve Brehm, was the first fish tagged in our study. Tag Number: #010 Tagged: 10/13/2012 Released: River mile 20.8 Fork Length: 401mm / 15.8″ Species: Rainbow Trout Angler: Arlen Thomason Surgery Specialist: Jeff Ziller,...
by Scott | Oct 12, 2012 | Five Year Mark & Recapture Study
Interested in why fish bite some days and not others? So were we! One of the side benefits of a rigorous sampling program like we have for the Five-Year Mark & Recapture Study is that we now have robust, quality-checked datasets to ruminate on! The 2010-2011 dataset includes over 1,400 angler hours on the river, and some 1,000 fish events. Since our data is date-specific, we can (and have!) associated it with date-specific environmental variables. We did preliminary exploration of the dataset using the following variables: Productivity variables – the ones we wanted to try to get to the bottom of! Bull trout productivity (fish per angler hour) Chinook salmon smolt productivity (fish per angler hour) Wild cutthroat trout productivity (fish per angler hour) Wild rainbow trout productivity (fish per angler hour) Hatchery rainbow trout productivity (fish per angler hour) Steelhead smolt productivity (fish per angler hour) Whitefish productivity (fish per angler hour) Tagged fish (wild cutthroat + wild rainbow) productivity (fish per angler hour) Total productivity, all species (fish per angler hour) Environmental variables – a cross-section of weather, flow, and temperature variables which speak to common conceptions of when fish tend to bite: Trip Data: Day of calendar year (indicator of early versus late in the season) Number of anglers in boat Names of anglers Total trip time Flow: CFS at Walterville Daily mean Day-over-day (1-day) change Day-over-day (1-day) trend (rising/falling/steady) 3-day moving average 3-day average change 3-day trend (rising/falling/steady) 10-day moving average 10-day average change 10-day trend (rising/falling/steady) CFS at Vida Daily mean Day-over-day (1-day) change Day-over-day (1-day) trend (rising/falling/steady) 3-day moving average 3-day average change 3-day trend (rising/falling/steady) 10-day moving...
