Black rams (Mikrogeophagus ramirezi)

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ryansmith83

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May 2, 2008
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One of the newest morphs of M. ramirezi are the black rams, also known as Dark Knight rams. I first came across this morph on Shahar Danziger's Facebook. He's also the supposed creator of "albino dantum" angelfish (which are nothing more than albino x Peruvian scalare, IMO) and a few other unusual things. There is also a breeder in South Africa working to refine the strain and make it deeper black.

I was lucky enough to get some fish from Martin B. in Illinois. They are not solid black but they definitely carry the dark genes. His pair throws both dark rams and normal colored rams, with a handful of jet black rams per spawn. My hope is to do some line-breeding and get a deeper color without sacrificing the health and vigor of the fish. The ones he sent me are very healthy, happy, aggressive fish. The dark ones seem particularly aggressive compared to normal M. ramirezi. I received them at about 12 weeks old and had my first spawn within about 2 weeks. They parent-raise.

Here is the male with the eggs.

 
After nearly a week free-swimming, the parents continued to get more anxious and aggressive. The female went nuts every time I got close to the tank which made it very difficult to take videos. I mostly left them alone because I didn't want them to get upset and eat the fry.

 
A few observations so far:

- These fry are bizarre. They barely eat from what I can tell. I never see bulging, orange stomachs after a brine shrimp meal the way I do with other cichlid fry. I never see them actually going for the brine. I was concerned that there was an issue and the fry were sickly, yet we are at 2 weeks and they're obviously growing, so they must be getting an adequate amount of nutrition.

- There is a ton of mulm and debris every day requiring at least a 50% water change. I'm guessing it's a combination of feces and dead brine but considering how small the fry are it just seems to be an unreal amount. You can see it in some of the videos, and that amount is what accumulates in less than 24 hours because I vacuum it daily.

- I initially feared the fry were sickly because they hang listlessly at the top of the tank or lie on the bottom. It took me a while to realize that this is a defense mechanism -- they only do it when I'm in the room. If I sneak in on them they're happy schooling about in the middle of the tank. The second they spot me, it's crammed into the top corners or lying flat on the sand.

- It looks like I have a handful of normal-colored rams, a very small number of jet black rams (and they seem to be the smallest and weakest ones), and about 90% of them seem to be a dark (while not black) color like the parents. This was noticeable even at a couple days free-swimming.

My hope is these fry continue to grow well and don't show any abnormalities. It's always hard to tell at this size. The goal is to keep line-breeding them to see if I can get darker fry, or even a line that breeds true. Right now they throw three distinct colors that I can see: normal, dark, and a couple jet black.
 
A few observations so far:

- These fry are bizarre. They barely eat from what I can tell. I never see bulging, orange stomachs after a brine shrimp meal the way I do with other cichlid fry. I never see them actually going for the brine. I was concerned that there was an issue and the fry were sickly, yet we are at 2 weeks and they're obviously growing, so they must be getting an adequate amount of nutrition.

- There is a ton of mulm and debris every day requiring at least a 50% water change. I'm guessing it's a combination of feces and dead brine but considering how small the fry are it just seems to be an unreal amount. You can see it in some of the videos, and that amount is what accumulates in less than 24 hours because I vacuum it daily.

- I initially feared the fry were sickly because they hang listlessly at the top of the tank or lie on the bottom. It took me a while to realize that this is a defense mechanism -- they only do it when I'm in the room. If I sneak in on them they're happy schooling about in the middle of the tank. The second they spot me, it's crammed into the top corners or lying flat on the sand.

- It looks like I have a handful of normal-colored rams, a very small number of jet black rams (and they seem to be the smallest and weakest ones), and about 90% of them seem to be a dark (while not black) color like the parents. This was noticeable even at a couple days free-swimming.

My hope is these fry continue to grow well and don't show any abnormalities. It's always hard to tell at this size. The goal is to keep line-breeding them to see if I can get darker fry, or even a line that breeds true. Right now they throw three distinct colors that I can see: normal, dark, and a couple jet black.


GL with your breeding project.
 
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