Trout weight by length

[bobo23]

Wondering if you more experienced guys agree with this chart. I was wondering how long a 7 lb trout is, on average. Found this chart on the web. Do you guys agree with it?



Spotted Sea Trout Inches Weight (lb-oz)
14 1-0
15 1-1
16 1-4
17 1-7
18 2-0
19 2-4
20 2-8
21 3-2
22 3-7
23 4-2
24 4-8
25 5-4
26 6-1
27 6-8
28 7-6
29 8-5
30 9-5
31 10-5
32 11-5
33 12-6
34 13-8
35 15-2

[YellowMouth7]

Man in my opinion it need to at least take into acount girth as well.....most calc that I have seen use length and girth

[swamp snorkler]

Depends on... if its spawning, if its measured on a boga grip bought from academy or CCA and also depends if its caught in TX or LA

[boatdriver]

May work in some estuaries, but in Big Lake, it differs considerably. I've caught 24" 5 lb trout several times and even have caught a 25" 7.3 pounder. Last year, a guy on my boat caught a 26 1/4" 8.6 pounder. These last two fish were footballs. Bunch of my guide podnuhs have done the same as well. In my opinion, we have some fat trout in our lake. It amazes me how healthy the females are. They gorge themselves and just want that one last meal, and chances are, it could be your super spook.

[bobo23]

"I've caught 24" 5 lb trout several times and even have caught a 25" 7.3 pounder. Last year, a guy on my boat caught a 26 1/4" 8.6 pounder. These last two fish were footballs"

That's some good info., right there!

[meaux fishing]

yeah what they said...It all depends on the fish. I caught a 23.5" 2.75lber one time at big lake too

[boatdriver]

Originally Posted by meaux fishing

yeah what they said...It all depends on the fish. I caught a 23.5" 2.75lber one time at big lake too

Absolutely. Fish will range on both ends of the spectrum.

[bobo23]

Maybe "W" and "Inch" can give us some lengths vs. weights Sunday afternoon.

["W"]

That chart works two ways

Like boat driver said, I've caught a 24inch 6+ and two years ago caught a 29inch 6.5lb

Go back to 2009- I caught a 25inch 7.6lb in August

[bobo23]

Guess I'll worry about catching them, first, and their weight, second.

[wtretrievers]

Can't go by that chart.
W is 4'8" & outweighs me by 50lbs & I'm 5'8"

[MathGeek]

The above graph shows weight vs. length of spotted sea trout measured by colleagues and I from Big Lake in 2011 and 2012. The blue line is the best fit line which produces the weights in the table below. Note that there are no measured fish longer than 27", so the table might be less accurate for longer fish. However, also note that of 247 fish measured, the trendline is within 1/2 lb for all of the 247 fish with the largest error being 0.427 lbs, so it is unlikely that a fish between 12" and 27" long would be more than 0.5 lbs different in weight from the table below. 91% of the fish measured were within 0.2 lbs of the trendline.


TL (in) Wt (lbs)
12 0.58
13 0.74
14 0.93
15 1.15
16 1.39
17 1.67
18 1.99
19 2.34
20 2.74
21 3.17
22 3.65
23 4.18
24 4.75
25 5.38
26 6.05
27 6.78
28 7.57
29 8.42
30 9.33
31 10.30
32 11.34
33 12.44
34 13.62
35 14.87

Oh, yeah, some of the fish in the graph were even caught by "W".

[bobo23]

Very informative, MathGeek. Thanks for that.

[Duck Butter]

Originally Posted by MathGeek

The above graph shows weight vs. length of spotted sea trout measured by colleagues and I from Big Lake in 2011 and 2012. The blue line is the best fit line which produces the weights in the table below. Note that there are no measured fish longer than 27", so the table might be less accurate for longer fish. However, also note that of 247 fish measured, the trendline is within 1/2 lb for all of the 247 fish with the largest error being 0.427 lbs, so it is unlikely that a fish between 12" and 27" long would be more than 0.5 lbs different in weight from the table below. 91% of the fish measured were within 0.2 lbs of the trendline.


TL (in) Wt (lbs)
12 0.58
13 0.74
14 0.93
15 1.15
16 1.39
17 1.67
18 1.99
19 2.34
20 2.74
21 3.17
22 3.65
23 4.18
24 4.75
25 5.38
26 6.05
27 6.78
28 7.57
29 8.42
30 9.33
31 10.30
32 11.34
33 12.44
34 13.62
35 14.87

Oh, yeah, some of the fish in the graph were even caught by "W".

Did you figure in the months that these were caught? Male vs female?

[Salty]

These charts are more indicative of Big Lake trout than Lake Pontchartrain.

[Duck Butter]

Originally Posted by YellowMouth7

Man in my opinion it need to at least take into acount girth as well.....most calc that I have seen use length and girth

Exactly. When you want to know the weight of something going only by length, the variability is going to be too great. When you throw in another variable such as girth, the calculations will be more precise. Just going by length, if you caught a bass the day before she moved onto a bed, she is going to be her heaviest (same length though) and you catch that same fish the day after she moves off her bed (same length), you may be looking at a difference of 2 lbs in some instances. IF girth was figured in, it would be much more closer to the actual weight, than just length.

In trout, I would think male vs female weight determined by length only would have variability as well, as the females carry eggs at different times of the year. The spawning season may last several months

[MathGeek]

Originally Posted by Duck Butter

Did you figure in the months that these were caught? Male vs female?

The spotted seatrout in our study were not sexed and were all caught between June 9 and June 15 (both in 2011 and 2012). The graph below is based on a much larger data set from the Louisiana Department of Wildlife and Fisheries. It shows only a small difference between weights of males and females in spring in Louisiana, and also little difference between spring and fall, with spring fish being slightly heavier at a given length.

[BossHog]

Time of year plays a huge role in the weights. Back when I was guiding I seen a lot of 30 inch trout caught in the summer that didn't even break 7lbs. That's why here in louisiana nobody cares about length just weight.

["W"]

Originally Posted by BossHog

Time of year plays a huge role in the weights. Back when I was guiding I seen a lot of 30 inch trout caught in the summer that didn't even break 7lbs. That's why here in louisiana nobody cares about length just weight.

That's why I laugh at Texas Reports when they say

"yep had 2-24inch 1-27inch great day"

LMAO.!!

[bmac]

Seems like what the graphs show is that hard data cannot overcome anecdotal evidence.