What's your biggest SM Yellowfish

[Richard Simpkins]

I still say the first pic is a LM.

it is a SMY

[smallstreams.co.za]

How do I post Photo's larger than 2 MB in a reply ?

You need to add a >2Mb option to the poll 1st ...

[SilverShadows]

This was undoubtedly my most memorable, maybe not my biggest though. Caught at sterkies(obviously) on dry.

[Pappa Roach]

Hi guys, went fishing last week to the Vaal managed to catch a lovely healthy yellow definately my biggest. No scale or pic but i did measure the fish, it was 55cm (forklenght). Any estimates on the weight? I assume it was around 3.5 kg, is there a lenght to weight convertor for fresh water fished? I searched the web but only found one for salt water fish.

[GGY]

Hi guys, went fishing last week to the Vaal managed to catch a lovely healthy yellow definately my biggest. No scale or pic but i did measure the fish, it was 55cm (forklenght). Any estimates on the weight? I assume it was around 3.5 kg, is there a lenght to weight convertor for fresh water fished? I searched the web but only found one for salt water fish.

Unfortunately there is not a proper one for SM.
A 60cm SM generally weighs around 2.7kg (6lb) - but that measurement is nose-to-tip & not fork length.

Based on that, your fish should be pushing 3kg

[FlyFanatic]

Did you measure the girth of the fish as well? The only way to accurately calculate the mass is by using both the length as well as the girth. I have an excel calculator which I once got somewhere. My PB was a nice and fat yellow of 62cm fork length, and 45cm girth, according to the calculator it weighed 4.04kg. We measured the fish with 2 different scales after it was caught, both gave the fish at 4kg's, so I would say it is quite accurate!

The ratio of the length vs girth of this fish is 0.73, therefore for your fish you could assume the girth to be in the region of 40cm, which according to the calculator would be about 2.83kg's. Remember this all depends on the girth of the fish, by changing the girth to 45 cm, the weight of the fish becomes 3.58kg's!

Do you perhaps have a photo of the fish?

Here is the calculation code for who-ever is interested:

Fish type K-value :

Yellowfish/Trout/Mudfish = 31.1
Bass/Carp/Catfish = 27.8 (dont know how accurate the catfish one will be...)

Weight = (((Girth^2)*Length)/K-value)/1000

Best Regards

Jaco

[FlyFanatic]

Unfortunately there is not a proper one for SM.
A 60cm SM generally weighs around 2.7kg (6lb) - but that measurement is nose-to-tip & not fork length.

Based on that, your fish should be pushing 3kg

Well then, listen to the master! Seems like the calculator is not to bad for yellow's after all!

Would be good to test this, please post your fish weight, length and girth values, then we can create an array table to see how accurate the results are!

[Gerrit Viljoen]

I dont understand you formula please explain???

Weight = (((Girth^2)*Length)/K-value)/1000

[FlyFanatic]

What must I explain G-man? I dont know how they came to this formula, if I remember correctly it was for trout, which some-one correlated to our freshwater fish.

WEIGHT = LENGTH x GIRTH² / SHAPE FACTOR


Come now Gerrit, you probably have the most fish data of all of us, punch in the numbers and give us feedback!

[Gerrit Viljoen]

Thanx Jakes,het nie die formula so mooi verstaan nie.