Thursday, August 14, 2008

More Tyee Graphs

Here's a couple more Tyee graphs for folks to review.
Information courtesy of Ministry of Environment, Smithers

Clicking on the image gives a larger view.

The Tyee Steelhead Index is now ranked the 9th best for this date since 1956.
The top graph compares 2008 Daily Tyee Index to the Best year 1998; the worst year 1957; and the All Years Average.

The second graph is the Cumulative Steelhead Index at Tyee from July 1st. to Aug.24 with the same parameters as above. And please take note of the caveat below regarding the Tyee Index.

NB: The regular caveat applies: The Tyee Test Fishery is a sockeye salmon test fishery; it is only calibrated for sockeye (Babine River Weir counts), although the DFO use data from all salmon species for management, as we do for steelhead. As such, Tyee catches are not standardized and therefore, comparing data between years or even individual days or gillnet sets is not valid in the strictest scientific sense. That said, the Tyee Test Fishery has been operated in the same manner since 1956 and a conventional gillnet vessel makes a 60 minute set with 200 fathoms (1200 feet) of net on every slack tide that occurs during daylight from early June to late August/early September.

Graphs and information courtesy and copyright Mininstry of Environment, Smithers

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