Results 1 to 5 of 5

Thread: King sizing formula

  1. #1

    Default King sizing formula

    I can't remember where it was that "Fish n physician" (sorry if I didn't get the name exactly right) was talking about the formula for getting the weight of a king from length and girth.

    I tried it out yesterday on the two kings we caught and on both of them it gave their weight as being 1.5 lbs. less than my fairly accurate scale said they were (I've tested it on various known weights and it's within an ounce or so at the worst).

    But I'm not sure now if I measured their girths properly and wanted to check on that.

    I was thinking about it and was wondering if maybe the fact that you were doing it on spawning kings that maybe they had a little more girth due to the massive egg skeins in their belly.

  2. #2

    Default

    Never mind. I found it.

  3. #3
    Member fishNphysician's Avatar
    Join Date
    Jun 2006
    Location
    Aberdeen WA
    Posts
    4,516

    Default

    Thanks for the feedback.

    My philosophy on stating fish weights is just like on the show "The Price is Right".... to be closest without going over. Overstating the weight of any fish is just too embarrassing.

    Just curious, were your measurements in that 3 x 5 ballpark?
    "Let every angler who loves to fish think what it would mean to him to find the fish were gone." Zane Grey
    http://www.piscatorialpursuits.com/uploads/UP12710.jpg
    The KeenEye MD

  4. #4

    Default

    On our 23 pounder the length was 36" and the girth was 21", but the problem is I was using a metal tape measure that I wrapped around it's girth. So that measurement is by no means "scientific" if you know what I mean. But that's not far off from the "3 x 5" scale.

    The 12 pounder was 30" and 15.75 ". But I have a feeling when you get down to kings that are in that size range making very precise measurements is going to be critical. We were in 5 ft. seas bouncing all over the place, so I wouldn't swear in court that my measurements were that precise.

    It was a fun experiment, but next time I need to be a little more careful. I've tested my scale on known weights, though, and I know for a fact that it's only off by an ounce or two at the most, so I'll stand by that for now.

  5. #5
    Member fishNphysician's Avatar
    Join Date
    Jun 2006
    Location
    Aberdeen WA
    Posts
    4,516

    Default

    Here's another scientific fish weight estimator developed on Skeena-strain steelhead. The Keelin formula uses a divisor of 690.

    http://flyfishingresearch.net/fishweight.html
    "Let every angler who loves to fish think what it would mean to him to find the fish were gone." Zane Grey
    http://www.piscatorialpursuits.com/uploads/UP12710.jpg
    The KeenEye MD

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •