The Planted Tank Forum - View Single Post - The Breeding Project: Dark Rams ( Update: + New EBR/GBR Pairs)
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post #6 of (permalink) Old 10-05-2019, 07:53 PM
Blue Ridge Reef
snails are your friend
 
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Quote:
Originally Posted by Discusluv View Post
These fish are lost in USPS no -mans land. Heart-broken as they should have been to me 3 days ago. Not worried that the vendor wont make good at this point ( I am getting assurances it will be made good) I am just sick that such a beautiful pair of fish are suffering or dead.

This is why I don't like to use vendors that ship USPS with fish.
Oh no! I'm so sorry to hear this. Just awful. Hopefully they arrive alive and still manage to acclimate, but I know the feeling in your gut right now. Fingers crossed for them.

Quote:
Originally Posted by Seattle_Aquarist View Post
Hi @Discusluv,

I too enjoy dwarf cichlids including Apistogramma and M. ramirezi. One of our local club members, Dean, has been breeding the 'black rams' for about a year now and has found out something interesting. First they are very sensitive as to water quality, since you know discus that should not be an issue. Second, unlike blue Rams, the size is of the spawn is much, much smaller. Lastly, only about 25% of the spawn are black, the remainder are light colored. I don't believe they are 'albino' per se but almost that color of pigment, it appears that the 'black' / 'dark' gene is recessive. I hope they do well for you! ( I am guessing they were a little on the 'pricey' side / I know what our member paid for his?)
I wonder if that's not a matter of more than simple recessive genes, then? If crossing two visual animals with the same simple recessive gene (or set of genes), you'd expect all offspring to resemble the parents. I bred corn snake mutations for a couple of decades and got pretty familiar with genetics on that scale -think back to the punnet squares from science class. My immediate thought is that the yellow (typical) rams are co-dominant themselves, or else the black individuals will show dark color even if only carrying the gene.
For example:
BB (true dark ram)
Bb (visually a dark ram, but only carries one allele)
bb (normal ram)
But in that supposition, you'd still expect all dark fry from a spawn of 2 dark individuals. This thread has taken me down a rabbit hole. Just read a 66 page topic on another forum with people discussing their breeding trials. Seems some folks are experiencing 100% black fry. Which would lead me back toward thinking it's a recessive gene with a visual heterozygous form. At any rate, I hope these make it and we get to learn more!

Nothing good happens fast in an ecosystem.
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