Cap'n Fishy
Well-known member
The moon rising last night...


If you PS'd the moon picture into the tunnel opening at the far end it would make an excellent surreal image ColOn the cycle path yesterday...
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My Angel fish has decided to spawn tonight despite not having a male in the tank
View attachment 34717
Not that I know of. They wont survive the night though the snails were already heading for them even before the lights went out, they must smell/taste them in the water.Interesting to see if they hatch, Sandy. Are Angel fish known for parthenogenesis?
Col
Not that I know of.
Well. You never know. If Komodo dragons can do it...![]()
I have not kept fish since I was a teenager, but I remember we had a tank with tropical fish for a few years, and was surprised to see one of the adult fish change sex. Might have been a platy or a swordtail? It was orange. Changed from a female to a male, totally out the blue.
Col
Are the white ones not deaders... which might mean... ???
Found this...
Those are supposed to be the ones that aren't fertilised but I wont be holding my breath![]()
Aye, that was what I was hinting at... maybe... just maybe...
I read about guppies doing a bit of parthenogenesis, but they are viviparous. However, the Komodos lay eggs...
Guppies need a male to start with but they can store sperm for up to three more spawnings, as can all the livebearers, that is when a female turns into a male if there are none about in the shoal. This is where phantom births come from. Somebody buys a load of Guppies from a tank that are all females but, unbeknown to him, one of them has come in contact at some point with a male and they get babies which appears to be a virgin birthIt happens if the breeder doesn't separate the boys from the girls at an early enough age.
This refers to them being separated at 12 days old...
https://www.nature.com/articles/171437a0
Dunno if that would be soon-enough? Also seems to be a bit of a one-off.
This looks interesting, but can't seem to access it without signing-up...
https://www.the-scientist.com/the-nutshell/endangered-fish-can-reproduce-without-mating-35366
Interesting.
I wonder though if it is the mated mother that gives birth to females that have a fertilised egg already in their body in case they don't get a male to mate with if they are in isolation?
There are things that do that. I'm struggling to remember them...
Under the microscope, a newly-born summer female already contains the embryo of the next generation, like a tiny Russian doll. In autumn, the females finally produce some males, allowing for mating and some healthy shuffling of genes.A single aphid could spawn enough descendants to cover the Earth in a layer of aphids 149km deep within a year