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Inbreeding Question
August 7, 2010
12:18 pm
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thelizzious
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/blush.gif" style="vertical-align:middle" emoid=":blush:" border="0" alt="blush.gif" /> Hi guys. i have a maybe very stupid question. I have been trying to find an article about inbreeding from fish in your aquarium. In my case this is about the juveniles of my Corydoras paleatus, and next to it of my Neocaridina heteropoda red. I know that the young Pepper cory's are not at "that" age yet, but do I have to find other houses for them in a while or can they just stay at home in my 120 l. tank?
They are "accidents" because I am not actively breeding with them. I have tried DB and all other aquaria websites on internet, even them on Wiki's. Also I have three "left over" corys, 1 Panda, 1 Aeneus and 1 Aeneus Albino. Are they staying single for the rest of their lives untill I get them new spouses? Or do the mingle with the Peppers? I can't find anything about this. I would be very glad if you can help me with this. Thx, Lizzy.

August 7, 2010
7:59 pm
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Matt
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Hey Lizzie don't worry about your corys - the majority of shop-sold ones have been farmed so in terms of genetics aren't of great stock anyway. With wild fishes you have to be more careful. Different types of cory will school together so your 'odd ones out' should also be fine.

Cake or death?
August 8, 2010
2:47 pm
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thelizzious
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Thanks so much, Matt. That's such a relief, I didn't want to miss them anyway.

This is a drawing picture of how my tank looks at this moment.

lizzysaquarium.jpgImage Enlarger

August 13, 2010
10:54 am
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pondmanuk
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Nice drawing lizzie - wish I had artistic talent! /smile.gif" style="vertical-align:middle" emoid=":)" border="0" alt="smile.gif" />

August 14, 2010
10:41 am
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Senor Bastardo
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Hi Lizzie,

I wouldn´t worry about inbreeding to much. As long as you breed the specimens that look healthy. A friend of mine has been keeping and breeding fish for some 30 years and he has been breeding on a single line (from a single pair) for several years without any apparent ill effects. Though it might be wise to bring in some fresh blood now and again if trying to keep a healthy stock.

August 14, 2010
12:26 pm
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thelizzious
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QUOTE (pondmanuk @ Aug 13 2010, 11:37 AM) < {POST_SNAPBACK}>
Nice drawing lizzie - wish I had artistic talent! /smile.gif" style="vertical-align:middle" emoid=":)" border="0" alt="smile.gif" />


Thanks Pondmanuk. I was just trying to give an impression of how my 120 l tank looked, but it isn't accurate anymore. It has become a real jungle again and it looks like the barber scissors are once more needed../wink.gif" style="vertical-align:middle" emoid=";)" border="0" alt="wink.gif" />

August 14, 2010
12:43 pm
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thelizzious
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QUOTE (Senor Bastardo @ Aug 14 2010, 11:24 AM) < {POST_SNAPBACK}>
Hi Lizzie,

I wouldn´t worry about inbreeding to much. As long as you breed the specimens that look healthy. A friend of mine has been keeping and breeding fish for some 30 years and he has been breeding on a single line (from a single pair) for several years without any apparent ill effects. Though it might be wise to bring in some fresh blood now and again if trying to keep a healthy stock.


30 years of one line, impressive! I hope my pair of Pepper corys can match up to that too. They're the only fish that actually reproduce besides of the Red cherry shrimps in my tank. I have an Aeneus cory bronze and one Aeneus cory albino, they have had ( a lot of) eggs, but no off spring so far. I also have one Cory panda (last in the tank at my pet shop) which is about the same age of the Pepper youngsters, they intermingle but I wonder if they will ever pair up. Is that even possible? /unsure.gif" style="vertical-align:middle" emoid=":unsure:" border="0" alt="unsure.gif" />

August 14, 2010
1:54 pm
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Eyrie
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The panda corydora won't breed with either of the other two as they are of different species.

Mature, sensible signature required for responsible position. Good prospects for the right candidate. Apply within.
August 14, 2010
3:38 pm
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Senor Bastardo
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QUOTE (thelizzious @ Aug 14 2010, 12:26 PM) < {POST_SNAPBACK}>
30 years of one line, impressive! I hope my pair of Pepper corys can match up to that too. They're the only fish that actually reproduce besides of the Red cherry shrimps in my tank. I have an Aeneus cory bronze and one Aeneus cory albino, they have had ( a lot of) eggs, but no off spring so far. I also have one Cory panda (last in the tank at my pet shop) which is about the same age of the Pepper youngsters, they intermingle but I wonder if they will ever pair up. Is that even possible? /unsure.gif" style="vertical-align:middle" emoid=":unsure:" border="0" alt="unsure.gif" />

Sorry bit of an misunderstanding, he hasn´t kept one line for thirty years, but has been breeding fish for thirty years. The longest he has kept a line going is ten years but he lost due, partly an exceptionally hot summer and partly loss of interest in the species. But he meant he could have kept breeding them if he wanted to.

August 15, 2010
2:12 pm
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Nomad
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Although it isn't really a huge issue, it is best to avoid inbreeding when and where possible. To continue breeding down a line is only recommended if you are doing so for a recognisable feature, i.e. long fins, otherwise you run the risk of genetic mutations leading to undesirable characteristics, most especially bent spines and crooked fin rays.

To avoid line breeding, simply remove the young of one sex, take them into your dealer/freshwater-and-brackish-water-fishes society and swap them for others of the same sex. With most fish, this is a really simple process.

Meantime, just the fact that your corys bred means you are doing something right. Congratulations!

August 25, 2010
9:39 pm
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MatsP
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Albino and regular colour Corydoras aeneus will breed (assuming you have at least one of each sex), and the fry should be normal coloured if the parent's are "pure".

It is not entirely unusual, however, that Cory females lay eggs without a male at all.

Most corys do not cross breed with other species, but there have been records of some species crossing (making hybrids). It is much less likely to happen if the corys are kept in a group of at least 6 of the same species.

--
Mats

August 31, 2010
1:22 pm
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Nomad
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QUOTE (MatsP @ Aug 26 2010, 07:22 AM) < {POST_SNAPBACK}>
Albino and regular colour Corydoras aeneus will breed (assuming you have at least one of each sex), and the fry should be normal coloured if the parent's are "pure".

It is not entirely unusual, however, that Cory females lay eggs without a male at all.

Most corys do not cross breed with other species, but there have been records of some species crossing (making hybrids). It is much less likely to happen if the corys are kept in a group of at least 6 of the same species.

--
Mats

I had some paleatus cross with a large aeneus female. The spawn hatched, but most were malformed and all died within a month.

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