Quote:
Originally Posted by maddmatt
its "yoy" "young of year" index
its a 3.92 for 2009
the last good year was 2003 at a 10.83
anything over an 8 is considered "good"
those are our 28-32" fish
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Just as an FYI--you are using the geometric mean (3.92) in your post, and I don't believe that an "8" is accurate for a "good" year using the geometric mean. 10 is considered an average year using the arithmetic mean. The chart in Sandman's posts also shows the YOY index as the arithmetic mean. Last year's arithmetic mean was 3.82, but the geometric mean was only something like 1.6. This year's YOY index of 3.92 geometric translates into an arithmetic mean slightly under 10---a little below average but still 2-3 times higher than last year's YOY index.
To give some frame of reference, from 1954 when MD started compiling these YOY indices until the record spawns of the early and mid 1990s, an "average" year would consist of an artithmetic mean of 8.0. The great spawns pushed an average mean to 12.0. Today a 10.0 is considered "average".