Synodontis nigrita size?

JG · Post by JG » 10 Sep 2005, 10:04

Hi all,

I've kept a small group of nigrita in a 42 gallon since April of this year and they've grown quite well. My concern is in regards to their adult size. Since the profile lists that they can reach 6.8"+ I would need to find new living quarters for the group or give them to another hobbyist. Can anyone confirm the adult size of the nigrita?

Also, can they only be sexed by venting or are there other traits that one can look for?

Thanks,

J

Post by **Birger** » 10 Sep 2005, 23:16

I think the sizes are right.

For sexing look for this flap of skin(genital papillae I think its called)
Healthy males have it females do not.
It's ahead of the anal fin.
Not the best picture but it shows what I want to show.
It's not always as easy to see on other syno's as it is on this multi.
[img][img]http://img295.imageshack.us/img295/7400/boo24et.png[/img]

Birger

Oliver D. · Post by **Oliver D.** » 12 Sep 2005, 20:50

Hi!

My Synodontis cf. nigrita have a size of 13-14cm.
They are more than 10 years old.

some pics...

old female:

old male:

young female(1 year):

youngsters:

sorry for the pics...
Oliver

JG · Post by JG » 13 Sep 2005, 08:34

Wow! Nice pictures! I definitely need to find a larger home for them. Could document the breeding in an article? If so, I'd really like to read it and post it on my own personal aquaria website.

J

JG · Post by JG » 13 Sep 2005, 08:47

Hi Oliver,

I just visited your website and struggled with the German. What a nice surprise to find that you're from Vienna. I'm from Canada myself but did a stint in Vienna between 2000-2002. I know this is a long shot but do you know Helga Rozzman, another hobbyist living in Vienna and involved with the local club there? She has some very nice tanks and lives in the 10th District on Otto Probststrasse. Check out her website at http://www.zierfischfutter.at.

J
http://www.freewebs.com/jays_aquaria

PS: What other species of fishes do you keep?

worton[pl] · Post by **worton[pl]** » 13 Sep 2005, 08:47

Hello Oliver,

I've just visited your site. Nice photos you got there :). Are you sure that "zebrinus" is a hybrid? Very nice fish indeed.

Regards.

sidguppy · Post by **sidguppy** » 13 Sep 2005, 16:44

Outstanding, Oliver!!

I didn't know that any riverine Syno had been bred without them being injected with hormones, as S eupterus, S decorus and a few more are. (wich might be bad, but it's a lot better than those hybrid trashies)

And no hybrids; well done!

I'll take it, they're in a speciestank?

Oliver D. · Post by **Oliver D.** » 16 Sep 2005, 15:42

Hi!

worton[pl] wrote: Are you sure that "zebrinus" is a hybrid? Very nice fish indeed.

Yes, I think...
They comes from Czech and the body looks similar to S. eupterus...

Oliver

Oliver D. · Post by **Oliver D.** » 16 Sep 2005, 15:51

sidguppy wrote:I didn't know that any riverine Syno had been bred without them being injected with hormones, as S eupterus, S decorus and a few more are. (wich might be bad, but it's a lot better than those hybrid trashies)
And no hybrids; well done!
I'll take it, they're in a speciestank?

In Europe some species are bred without hormone-injektions... officinal literature!

They live together with some other species in a 300 liter tank.

Oliver

worton[pl] · Post by **worton[pl]** » 28 Sep 2005, 16:47

Hiya,

what about <a href="http://fishbase.sinica.edu.tw/summary/S ... 3">this</a> fish? Nice body pattern, similar to zebrinus I think.

Regards.

sidguppy · Post by **sidguppy** » 28 Sep 2005, 17:25

The pic shows another hybrid!

ornatipinnis has a broad snout with thin whiskers; and the head should be spotted or with a very fine pattern, very contrasting to the body wich should have this 'wormy' pattern, or in very small baby fish many bands like it's a stubby S brichardi.

one of THE typical marks of Synodontis ornatipinnis is that it looks like it's head has been taken from another Syno.....wich is not common in Synodontis.

I saw a buch of the Syno's in that pic in a LFS here, recently; they were absolutely stunning.....

but I don't do hybrids, no matter how cool they look.
and yes, those were sold as ornatipinnis, with a ditto price-tag.

worton[pl] · Post by **worton[pl]** » 29 Sep 2005, 10:33

:(

Anyone got photos of oryginal ornatipinnis? (or maybe a drawings?)
I saw this fish in few pet shops here not long time ago.
Thanks Sid for your description - I just cannot imagine that - I saw to few synos in my life to be able to do it :/.
However these in pet shops look exactly like this fish in fishbase :(.
It's strange that here in Poland there is no way to buy any spiecies from Tanganyika - however hybrids appear very often with very low prices (around 1$ US).

Regards.
P.S.
Damn hybridizations :(

Erwin · Post by **Erwin** » 30 Sep 2005, 19:28

Servus Oliver,

a little bit a late replay, but still I hope it helps. I think your fish are S. robbianus. The small membrane at the barbels of the upper lip (maxillary barbels), the dots on the body which are not closely set, and the form of the shoulder appendix (humeral process) is very much alike S. robbianus. S. nigrita owns more closely set dots and maxillary barbels which do not show such a well developed membrane, also they seem to be longer.

Erwin