I have tried to write this page in English with Google translator. Click the Danish version and see the original Danish website. Note the English page is under construction and therefore not finished. I need to read the proofs of the page.

Is a sea trout "Conditioning Factor" Fiction or Fact?

Here you can calculate the "conditioning factor" for your sea trout, calculated according to Fulton formula. Fulton is working with values between 1.00 and 1.20. Want to learn more about the "conditioning factor", then go to these websites: Snygaard and R. Piil. They describe a little about why the trout and salmon have different "conditioning factor" depending on habitat.

The two websites are preferably applicable to sea trout. Salmon is usually longer per weight unit. You can use the calculation, but you get lower numbers, and the comments are not quite correct. Typical values for spring salmon are between 0.90 and 1.10. Calculations of more than 50 salmon from Varde Å show an average of 0.95. It will be interesting to see what the condition factor will be when all 130 salmon are caught. By 2018 I have calculated an average of small salmon to 0.95 and too large salmon 1.05. It gives 1,00 on average for salmon in Varde Å.

In the image on the right you will find a table of sea trout weight in kg and length in cm. The outer column to the right shows the conditioning factor for sea trout, when it is a good fish. Of course there are variations in the conditioning factor. It is depending on where the sea trout have lived and taken his food. The large "Herring-eater" have a high condition factor.

Click the image for Weight destination formula.
Weight g Length cm Conditioning Factor
Smoke oven dressed in snow
Smoke oven dressed in snow

Enter fish weight in grams and fish length in cm. Use decimal sentence, if required.
Then press "Calculate Conditioning Factor." The unit of measurement is grams per cm ³ * with a constant (100).
Weight in g
Length in cm
Conditioning Factor
Comment to "Conditioning Factor". Must be between 1.00 and 1.20

  Try it on your own fish and see if you agree.
Let me bring an example of a good sea trout of 5.5 kg and 77 cm long. Conditioning factor is 1.20. It is a sea trout in very good condition, which is worth cold smoking. Once the trout has been up to spawn, and you catch it, the conditioning factor remains at 0.99. Since the length is constant, it must be the weight that has gone down to less than 4.5 kg. So the sea trout lost over 20 % in weight. The sea trout lost protein is loose in the flesh, and not worth eating. Release the fish so you can enjoy the catch in the autumn. It will weigh 9.1 kg and 91 cm long and with the same conditioning factor as before 1.20.

The Facts!
Back to the page where you came from.