The wonders of fishkeeping, huh? I don't know the answer to this, but I have seen information about certain female livebearers being able to store several 'donations' from different males, and selectively using one or the other based on her desired outcome. Is it something like that? Is it temperature (which can determine the gender of crocodile hatchlings)? Is it pH? Fascinating.
In some of my community breeding tanks most the male guppy fry get eaten since they are smaller than the female fry. If I separate the fry the first couple hours after birth I get more males.
I love this channel ! I watched a documentry on lizards once, in poluted enviroments the lizards would only produce a single sex. Perhaps fish work the same. What the trigger is for fish , I have no clue.
Interesting, Scott! Last year my neon orange swordtails only put out males. Since then I saw a channel @HarlanFord and Australian doing a video on the subject. What he came up with was a function of pH and temperature. And based on Mark's comment below I tend to agree. My two cents.
Some species of fish and amphibians/ turtles etc give birth to only one sex depending on Temp.. for most of the livebeares I have kept before I get lots of both in the 72-74 temps
From what I know,having bred Many types!! of Livebearers. Higher temperature will Always produce more females to males. It's a way some fish and amphibians have developed to ensure the survival of the species. (ie) 1 male will breed with 20 females. Just my theory.
I remembered an Aquarium Co-op video from about 5 years ago where Cory visited a fish farm that produced a lot of guppies, and the guy said that a generation of mostly female guppies would later produce many more males in the next generation. He said his ratio was 1 male to every 10 females. Here’s a link to the video. His description of the male to female ratio starts about 4 minutes in: th-cam.com/video/xc2LsND-OAE/w-d-xo.htmlsi=u2E9d1X3KBZrPFjG
Im not 100 percent on this but I was getting lots of females and i push my temp up to 80 degrees and then started getting a mix? Use to run temp around 74? That might help.
I had swordtail get fry Thought all we’re female it took about a year turned out all were male, except for one I think the rest of the males will hide their gender to the dominant male
The wonders of fishkeeping, huh? I don't know the answer to this, but I have seen information about certain female livebearers being able to store several 'donations' from different males, and selectively using one or the other based on her desired outcome. Is it something like that? Is it temperature (which can determine the gender of crocodile hatchlings)? Is it pH? Fascinating.
In some of my community breeding tanks most the male guppy fry get eaten since they are smaller than the female fry. If I separate the fry the first couple hours after birth I get more males.
I love this channel ! I watched a documentry on lizards once, in poluted enviroments the lizards would only produce a single sex. Perhaps fish work the same.
What the trigger is for fish , I have no clue.
Interesting, Scott! Last year my neon orange swordtails only put out males. Since then I saw a channel @HarlanFord and Australian doing a video on the subject. What he came up with was a function of pH and temperature. And based on Mark's comment below I tend to agree. My two cents.
@@garageaquatics2023 yea I seem to remember you talking about your sword tails
I have read temperature can play a part on it but I have no scientific evidence to back that so take it as it is 😁
Some species of fish and amphibians/ turtles etc give birth to only one sex depending on Temp.. for most of the livebeares I have kept before I get lots of both in the 72-74 temps
@@stubbsaquatics6080 well my tanks are all in that range
@razinfishes1918 good thing about swords is if they are all females... Some will morph into males
From what I know,having bred Many types!! of Livebearers.
Higher temperature will Always produce more females to males.
It's a way some fish and amphibians have developed to ensure the survival of the species.
(ie) 1 male will breed with 20 females.
Just my theory.
I remembered an Aquarium Co-op video from about 5 years ago where Cory visited a fish farm that produced a lot of guppies, and the guy said that a generation of mostly female guppies would later produce many more males in the next generation. He said his ratio was 1 male to every 10 females. Here’s a link to the video. His description of the male to female ratio starts about 4 minutes in:
th-cam.com/video/xc2LsND-OAE/w-d-xo.htmlsi=u2E9d1X3KBZrPFjG
@@bobmorgan476 awesome I'll check it out thank you
@ you’re welcome. Good luck with them!
Im not 100 percent on this but I was getting lots of females and i push my temp up to 80 degrees and then started getting a mix? Use to run temp around 74? That might help.
Hum thanks interesting. My guppy tank is un heated and my sword tail tank is heated
I had swordtail get fry Thought all we’re female it took about a year turned out all were male, except for one I think the rest of the males will hide their gender to the dominant male
@@Jimsfish well not sure how true that is as I have pull fry and put in a tank with no other sword tail's and still all female