Lake Tanganyika Species • Crassus spawns..

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Crassus spawns..

Postby fishoverlivingspace » Wed Nov 07, 2007 9:27 pm

I've got an apparently mated pair of Neo. Crassus Moliro bluefin in my 20-long tang. tank, and they just laid about 35-40 eggs. They beat the 3rd member of the species like you wouldn't believe. Anyway, I was wondering if anyone feels its possible to raise young in this community (with 2 Phylonemus typus and 2 Eretmodus cyanostictus). I am doubtful to begin with because of the catfish, but if anyone has any feeding tips or any kind of advice, it would be much appreciated!.
Thanks
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Postby the_evil_dickfeldi » Thu Nov 08, 2007 2:06 am

Congrats on spawning crassus! They are my FAVORITE brichardiine cichlid.

But, IMO, TBH, I don't know where to start to answer your question. Maybe you could remove the catfish or put the crassus into a different tank?
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Postby triscuit » Thu Nov 08, 2007 7:47 am

In my tanks, gobies are avid fry predators and syno cats eat all the eggs. So, no. I wouldn't suspect that many eggs will make it full term, and any fry that hatches will have to be quick to avoid being snacked on. I haven't kept crassus, so I could be wrong!

Congrats on the spawn! :thumb:
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Postby fishoverlivingspace » Thu Nov 08, 2007 12:42 pm

the issue here is that im in a dorm room with an RA that would bust me if i put another tank in here. I want to get some survivors, but all i ever hear about phylonemus is that they are big time fry eaters. Maybe I'll just put the eggs in a net inside the tank or something.
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Postby Longstocking » Thu Nov 08, 2007 12:48 pm

No way with the typus in there. They will eat anything that can fit into their mouths. I've seen them eat a full grown female guppy.
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Postby fishoverlivingspace » Fri Nov 09, 2007 11:28 am

just thought id keep you updated. about 25-30 of them have reached the free-swimming stage, and it seems like the power filter is the biggest threat to them at the present time. The parents are being extremely attentive, one not even leaving the burrow to feed, i have to feed it with a turkey baster. One phyllonemus never leaves a conch shell that is in the tank, and the other seems to keep to himself on the other side of the tank. The crassus that got beat up by the parents also never leaves the conch shell, and the eretmodus, although extremely active, don't seem to be showing much interest in the babies. Wish me luck!
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Postby fishoverlivingspace » Mon Dec 03, 2007 11:21 am

So all the babies were, as expected, eaten. But over the weekend while I wasn't home, there was another spawn. I'm uncertain, but it almost appears like the male may have spawned with two different females, because there are two swarms of young, both with about 25-30 babies. That seems like a lot of eggs to have come from one female, doesn't it? Just about every fish in the tank seems to have been taught a lesson as to who occupies the middle of the tank, and one parent seems to be controlling the entire tank. Of course, that may all change when the lights go out. Solution: leave the lights on. Alternatively, I might scoop up as many babies as possible and keep them in a large net for a few weeks until they are stronger swimmers. Again, wish me luck!
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Postby ubergoober » Thu Dec 13, 2007 10:41 pm

Good Luck!!
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Postby fishoverlivingspace » Fri Dec 14, 2007 3:31 pm

so its been about two weeks, and my estimated losses are probably 10-15 fry, with around 40 remaining in the tank. One of the typus was killed in the parents efforts to protect the fry, which is probably one of the big reasons why the survival rate has been so high. The tank's getting pretty green because I've been leaving the lights on 24 hours a day, but that has contributed to their survival as well, I believe. In addition, whatever weird hairy stuff is growing on the rocks probably houses some food for the fry, as I dont really have the means to hatch brine or any other small live foods for them. The smallest food I've been feeding has been ground aquadine, and they seem to be faring well. Aside from the typus loss, so far so good!!
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Postby triscuit » Fri Dec 14, 2007 8:38 pm

Fish can die from sleep deprivation. I'm not joking. They do need sleep. :zz: I had a basement bedroom that was slightly creepy, and managed to kill off my tank after using it as a nightlight for a couple months.

http://www.timesonline.co.uk/tol/news/uk/science/article2666531.ece
http://www.practicalfishkeeping.co.uk/pfk/pages/item.php?news=1424

I'm glad it's saving your fry, but is leaving the light a poor fix for removing the typus?
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Postby Multies » Fri Dec 14, 2007 10:34 pm

Wow, great link triscuit. i do turn off my lights but i never knew too much light exposure can kill them. just take the fishes i or move them to a 15G. will be alot more comfortable for all the fishes in your tank.
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Postby YoungAquaticPhotos » Sat Dec 15, 2007 12:16 am

I have 6 of them and can't wait for them to breed! Two have paired off and chase everyone else like there is fry but when I pick up the rocks no fry yet.
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Postby Dave » Sat Dec 15, 2007 9:49 am

The spawning is great. However, shouldn't a 20 gallon long be a single species tank for a breeding pair of any fish from the brichardi-complex? That would go the same for nearly any Julie or non- shellie lamp. Why but the fish throught the stress, and death(s) as in this case? One way or another you will end up removing all the extra fish. The only question will be if they are alive or dead when you do it.
Come join us at the Madison Area Aquatic Hobbyists (MAAH) meeting. http://madisonaquatichobby.com/
Current project: spawning Paretroplus kieneri
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Postby Multies » Sat Dec 15, 2007 9:53 am

i second that.
just taking out the extra fish will help out in both cases.
your crassus and the extra fish will both benifet frolm that.
losing fish=sad.
fry=happy.
surviving fry=happy parents and you.
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Postby fishoverlivingspace » Sun Dec 16, 2007 1:54 am

I appreciate the links and stuff, and I am aware of the risk, but if you read my initial entries, I am unable to put the fish anywhere else as there are rules in my dorm not only on size of aquariums kept, but on quantities as well. I've tried to work my way around it, but things don't always work out the way you want them to. I am aware that it is not intelligent to leave the lights out all the time, I hear stories like this all the time at the lfs I work at at home. Also, I realize its kind of inhumane to potentially sacrifice other fishes' lives for the sake of the fry. However, its a bit inhumane either way, I think. I will be going home in one week where I have dozens of aquariums to raise the fry, allow the parents to recooperate, and let the rest of the tankmates recover their nipped fins. Yes, a 20-long should be a pair only tank for breeding brichardine cichlids, but this was meant to be a nice tanganyikan community when I started school, as I was starting to miss my display aquariums at home. I usually let nature take its course with breeding, and end up with a few survivors, but since I have never bred crassus before, I wanted to get a good turnout rate. I don't think one more week of the lights being on will kill my fish, particularly with how many caves there are(and large shells that are completely dark). My fish must be getting some sleep somewhere, although certainly not enough. I know that what I'm doing here is probably not the best way to go about things, but I'm kind of stuck between a rock and a hard place.
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