I was arguing with this guy today..........

  • We are currently upgrading MFK. thanks! -neo
How do you know this? What species is this observation based on? Do you have negative controls?

I've picked pairs out from a group and spawned them when they were young. Compared to the rest of the group that didn't get to spawn, there was absolutely no difference in growth later. I've seen this with miltiple species. Given proper care, the effect of spawning activity on growth is neglectable.

That's the key phrase there. If you provide the pair with a large tank and good clean water then growth may not be affected. Most people probably do not provide an optimal environment for this. I know Mel's pair of freds spawned very young but if you look at his later vids the pair look just as big as any other pair of freds out there. Large tank + clean water = optimal growth.
 
He's an idiot :) No but seriously that doesn't make sense. Also did he work for petco or petsmart?
 
No, it wasn't a pet store employee thankfully. He was just one of those people who think they know everything and if they don't, they just make up stuff that they think sounds good


Sent from my iPhone using MonsterAquariaNetwork app
 
False...my Geophagus Altifron female kept growing after breeding. However it did slow her growth (being that they are mouth brooders and abstain from food for months).
 
Fish exhibit what is referred to as "indeterminate growth" which means they don't grow to a certain size. Their size at death is determined by a number of factors (diet, temp, O2, hormone concentrations, ammonia, et cetera). While breeding at a young age could possibly affect the maximum adult size to some degree, I don't believe it necessarily would.

Correct, with the added caveat that due to the energy required for breeding (egg production) by females, early & continual breeding at an early age can cause slower overall growth, compared to males of the same species. This is what many hobbyists typically experience, and many do not keep their fish long term (until death) so may not see the eventual mature female sizes. (at death)

Also, as Bob stated some female cichlids (such as mouth brooders) will generally not eat much, if any, for long periods while breeding, and this can also sometimes be seen even by substrate spawners if they are spawning in a community tank, where they spend a great deal of time & energy protecting their eggs/fry from their tank mates. In many cases these fish will also go of their feed for extended periods of time.
 
Correct, with the added caveat that due to the energy required for breeding (egg production) by females, early & continual breeding at an early age can cause slower overall growth, compared to males of the same species. This is what many hobbyists typically experience, and many do not keep their fish long term (until death) so may not see the eventual mature female sizes. (at death)
.........
only Fw/F growth should be used for comparisons, and IMO, F's from same parents.

I had the same thought about ppl not keeping respective females until death at old age.
 
LOL, fine .........early & continual breeding at an early age can cause slower overall growth in females, compared to females that are not continually spawning. Better?


This isn't exactly rocket science. Egg production requires energy, energy that beyond normal metabolic functions would typically go towards growth. Males are not as greatly affected by spawning as sperm production requires less energy than egg production.

Then factor in that spawning females often feed less, some far less, than when not spawning, and the slower overall growth part of the equation should become rather obvious. Less energy intake via feed, more energy going to egg production vs growth = slower overall growth.
 
LOL, fine .........early & continual breeding at an early age can cause slower overall growth in females, compared to females that are not continually spawning. Better?


This isn't exactly rocket science.............the slower overall growth part of the equation should become rather obvious. Less energy intake via feed, more energy going to egg production vs growth = slower overall growth.
LOL. I wasn't debating, just sayin..
and Lolz @rocket science. more relief.
can you also re-post that in comic sans?
 
MonsterFishKeepers.com