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How much weight do bass lose after spawning

7397 Views 23 Replies 18 Participants Last post by  ducr459
I am just wondering about this because i caught a fish last year around late may (post spawn for the lake i was at) and the fish was huge measuring 24" However it was very skinny and only weighed in at 6 pounds 13oz. The fish had a frame where if it was fat looked like it could potentially reach 8 pounds when full. I could almost fit both fists in its mouth. How big do you guys think this fish would have been if it was caught prespawn, and how much weight is lost on average during the spawning period.

Thanks

novice
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it all depends on the capacity of eggs that a fish can hold.mature females range from weights of 2and half pounds and bigger.the bigger the fish,the more eggs they can hold...im sure a fish can hold up to a pound of eggs and im sure that there is other nutrient depletions during the apwn as well....
I caught my personal best just two days ago and it was a touch shy of 24 1/2". If that fish wasnt a darn 8#+ bass then I'm Cyndi Lauper. I have caught that length before, but never this chunky. I fish mostly for stripers and this felt like it could have gone ten! MOnster!
NOTE: THIS WAS AT A LEGAL TO C&R BASS LOCATION IN SUFFOLK CO.

It did have a very sore right ventral fin, very reddish and not looking well. Its tail was also sort of nipped at and sliced (not wounded or sore) and otherwise was in good health. She was a BRUTE!!, was fat as all get out but not bulging with eggs, her thick slime coat makes me think she getting ready for brood (do the fry feed off the slime?) No indication of hook marks or recently being caught anywhere.

8# copoly line. Senko 3/0 ewg gammy I ghasped when I saw the purchase my hook had upon landing, it was hanging inside the mouth hooked to a piece of the roof, one good tug from ripping free! She was measured for length and quickly released within ten seconds.

I would like to learn more about largemouth spawning and there post spawn activity. Anyone have any links to good articles??


Thanks much.

JC
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Judging by the 2 pounders I have been catching lately, I venture to guess they loose double or triple their body weight LOL!!
Lose ... sorry I had a Paladin moment..
I think it is safe to just tell people that you caught a 10 lb fish.
I've never cleaned a prespawn largemouth, but the 5-10 lb. trout usually have 12-24 oz. of skein. That may be totally useless info, though. My advice: catch the big ones prespawn.
Good question, I bet it's a lot
im sure a fish can hold up to a pound of eggs and im sure that there is other nutrient depletions during the apwn as well....
Would have to agree, depending on the size of the fish you could be looking at anywhere from a 1lb to 2lb swing.
I don't ever recall seeing the egg sack of a largemouth. I know in a large perch, the egg sac is nearly the size of your fist, but in a large crappie, it is only the size of your pinky finger.
I recall LM skeins from when I was a kid in Texas - we cleaned all our fish back then. Pre spawn females had significant mass in their egg skeins. There's a reason they have big fat bellies - there are two big egg skeins in there - bigger than you might think.
I have the same question as you Novice. Today I caught a 23" 6.5.lb largemouth. The head on this bass was huge however, the rest of the body was skinny.

I believe in one of Doug Hannon's books he mentions that a bass will most likely be at their heaviest weight during the summer when their metabolism and food intake combine to produce the maximum weight gain. How much heavier? I guess it's hard to say.

The bass I caught today was an inch longer than my previous personal best yet today's bass had a completely different body. It's hard to explain, but just the head and the overall body seemed to be able to hold much more weight. I would think that if I caught this bass later in the year she may go 7.5-8lbs or more. Who knows, but I'll be looking for her! :thumb:
Don't want to bust any bubbles, but the weight of eggs in bass is approximately 10% of its body weight. To get a 2-lb. mass of eggs your fish would have to weigh between 18-20 pounds without the eggs.
Lose ... sorry I had a Paladin moment..
so did I which is why I went in an corrected the spelling...
and now the grammar

so did I which is why I went in and corrected the spelling...
so did I which is why I went in and corrected the spelling...
so did I, which is why I went in and corrected the spelling....
I am just wondering about this because i caught a fish last year around late may (post spawn for the lake i was at) and the fish was huge measuring 24" However it was very skinny and only weighed in at 6 pounds 13oz. The fish had a frame where if it was fat looked like it could potentially reach 8 pounds when full. I could almost fit both fists in its mouth. How big do you guys think this fish would have been if it was caught prespawn, and how much weight is lost on average during the spawning period.

Thanks

novice
I can't lay my hands on it at the moment, but somewhere around here, I have a copy of a scientific paper that rips the 2# of eggs myth apart.

Actual weight of the eggs in a prespawn bass rarely approach 1 pound, and that was in a fish of more than 11 pounds! But the real part of the study, after they set a baseline with weighing the eggs from bass that were caught just before bedding started, was to weigh and tag a bunch of prespawn fish from a controlled pond, then weigh them again immediately after the spawn. The researcher found that there was more to the weight loss during spawning than just the weight of the eggs. He attributed the difference to an extended period of high energy expenditure with little or no calorie intake. The average spawn related weight-loss for females worked out to somewhere just over 10%, while for males it was 4 to 5%. Note that males don't carry any eggs, but they go a much longer period without eating, while spending a lot of energy protecting the nest.
So from what i am getting out of this thread was the fact that this fish was missing eggs but that wasnt the real reason it was underweight, it was basically malnurished? Not finding enough food?
Basically female bass do not eat from the onset of the spawn and then for approximately 7-10 days post-spawn. Hence the term post-spawn blues.
I can't lay my hands on it at the moment, but somewhere around here, I have a copy of a scientific paper that rips the 2# of eggs myth apart.

Actual weight of the eggs in a prespawn bass rarely approach 1 pound, and that was in a fish of more than 11 pounds! But the real part of the study, after they set a baseline with weighing the eggs from bass that were caught just before bedding started, was to weigh and tag a bunch of prespawn fish from a controlled pond, then weigh them again immediately after the spawn. The researcher found that there was more to the weight loss during spawning than just the weight of the eggs. He attributed the difference to an extended period of high energy expenditure with little or no calorie intake. The average spawn related weight-loss for females worked out to somewhere just over 10%, while for males it was 4 to 5%. Note that males don't carry any eggs, but they go a much longer period without eating, while spending a lot of energy protecting the nest.
That makes a ton more sense to me now. Thanks for posting that. If you find a reference to the study, post back. I'd be interested. Thanks again Rich!
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