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Bonjour à tous,

J'ai posté un message dans la rubrique "Other Catfishes" à propos de mes Porochilus (ou Neosilurus) rendahli. Ceux-ci sont arrivés en Belgique via un import que j'ai fait d'Australie avec un ami allemand.

Vu leur élégance et leur gentillesse (ce ne sont absolument pas des prédateurs), j'aimerais les reproduire. Je sais que certains autres Plotosidae d'eau douce l'ont été en captivité.

Est-ce que quelqu'un aurait une idée, une suggestion ou une expérience ?

Christian

Je posterai des photos dès que j'en aurai

Hello!

Pour ma part aucune idée!
Je me une traduction, je pense que d'autres pourront t'aider:

Chris is seeking experiences, informations and suggestions on breeding Neosilurus (Porochilus) rendahli.If anyone could help him with this!

Cheers
Yann

Thank you for searching informations, Yann.

Merci de demander des infos.

En Australie, ils reproduisent Tandanus tandanus à l'aide d'hormones et par fécondation artificielle. C'est un poisson de table fort apprécié. Mais le but n'est pas le même en aquarium où il faut amener les animaux à être bien.

Beaucoup de poissons des Northern territory se reproduisent quand l'eau est chaude. Je vais essayer ça en automne (le printemps pour eux). Si ça ne marche pas, j'essayerai la technique des orages comme pour les corydoras.

Je vous tiens au courant

A bientôt

Christian

Salut à tous,

J'avais promis de poster des photos et de donner des nouvelles de mes Neosilurus rendahli

Ce poisson-chat est très pacifique et vraiment innofensif avec les petits poissons (au-dessus de 4 cm quand même). Il adore les daphnies, les artemias mais mange aussi des comprimés pour poissons de fond, des paillettes etc

La reproduction, c'est pas encore gagné mais je vous tien au courant le cas échéant

Christian

PS : Peut-on me donner la procédure pour envoyer mes photos ?[/img]

Salut à tous,

J'avais promis de poster des photos et de donner des nouvelles de mes Neosilurus rendahli

Ce poisson-chat est très pacifique et vraiment innofensif avec les petits poissons (au-dessus de 4 cm quand même). Il adore les daphnies, les artemias mais mange aussi des comprimés pour poissons de fond, des paillettes etc

La reproduction, c'est pas encore gagné mais je vous tien au courant le cas échéant

Christian

PS : Peut-on me donner la procédure pour envoyer mes photos ?[/img]

Salut Christian!!!

Cool!!!
ici tu trouvera + d'infos...(fin du message)

A++
Yann

Hello Christian and Yann, sorry to reply here in English but I am interested in this family of fishes and currently have two P. rendahli in my care. I have a good reference book that has a few notes on reproduction as observed in wild populations. The book is â??Freshwater Fishes of North-Eastern Australiaâ?? by Pusey, Kennard & Arthington, here is a link to the publisher: http://www.publish.csiro.au/nid/18/pid/3922.htm

To summerise the information in the book, all of what is known about the reproduction of Porochilus rendahli is from a 2001 study by Bishop and others of the Alligator Rivers Reigon in the Northen Territory. The fish reportedly attains sexual maturity at 100mm for male and 110mm for females and the breeding season occurs early in the wet season. Warmer temperatures (28C) trigger reproductive changes and the fish are reported to migrate to lowland lagoons prior to spawning.

Other useful information provided regarding the care of this species is that it is frequently associated with aquatic plants. This has been borne out in my experience, my fish prefer to rest in the more densely planted areas of their tank and they are much more shy and easily spooked than the species of Neosilurus I keep with them, although no serious agression has been shown between the species. ANGFA surveys have reported P. rendahli to be found occuring with and , which are the two other species of eel-tail catfish I keep.

I have not yet attempted to breed my fish, I do not have the room right now, although I did notice some brief spawning-like behaviour in my trio of N. hyrtlii immediately after they were moved to a new tank, which does suggest that large water changes may stimulate spawning.

Anyway I hope this information will be of use to you, best of luck with your spawning attempts and be sure to keep us updated with your fish.

Regards,
Andrew

Hi Andrew,
Thank you for the information. I was thinking exactly the same about behaviour of our Neosilurus. They are relatively shy and stand the all days in the plants, sometimes hanging vertically, very funny. A German friend of mine has seen the same but in the spawning mops he has set to reproduce rainbows. So that must be the correct place were they live, probably also with Mogurnda species that have the same behaviour.

I had an information from ANGFA about Syncomistes buttleri (that I am holding too) telling that they were spawning under high temperature. They are founded in the same rivers that our catfishes, so that would be a good track. Also large waterchanges are a track.

I will try it and keep you updated. But it will be a bit later (no place for another tank for instant). I have first of all to distribute my 200 Ptychochromis I have reproduce and that's not a easy way in Belgium because Madagascan Cichlids are not well known.

Regards

Christian

Thanks to Christian, we now have online

Jools

Thanks for postig pictures of this wonderful catfish

Maybe it can be adjuncted to the comments that there is no problems with small tankmates and that those fishes likes to hang in the plants.

They are living in shoals and females are bigger than males.

Temperature seems to me to cold. They are normally frying around 28 °c.

I noticed some attouchments between pairs when I change water and on a temperature of 26-27 °c.

I will tell the following of the story

Cheers

Christian

Good work Christian, the fish in the photos look in quite good condition. How many do you have in total?

I have sent Jools a PM with some additional information on this fish such as temperature etc. Also it should be in the genus Porochilus and not Neosilurus, despite its classification on fishbase.

Here is a link to the ANGFA database with further information:
http://db.angfa.org.au/display.php?tbl=fish&id=78

snowball wrote:Good work Christian, the fish in the photos look in quite good condition. How many do you have in total?

I have sent Jools a PM with some additional information on this fish such as temperature etc. Also it should be in the genus Porochilus and not Neosilurus, despite its classification on fishbase.

Here is a link to the ANGFA database with further information:
http://db.angfa.org.au/display.php?tbl=fish&id=78

If you post such corrections in the "Bugs" forum, I can make updates (except for changing the genus) to the data-sheet. Jools is very busy, so it may take a few days (or weeks) before he makes such updates. Keeping it in the Bugs forum is a constant reminder that it needs fixing. Once it's been fixed, it gets moved to the "resolved" forum.

--
Mats

Hi Andrew

"Good work Christian, the fish in the photos look in quite good condition. How many do you have in total?"

I have four wich I think there are two pairs. I think more would be better but these are not small fishes. Often the biggest female is "flirting" with two males but still no eggs . Should it be possible they spawn in groups like Corydoras ?

Cheers

Christian

Hi Christian, as mentioned there is very little information about the spawning of P. rendahli, however there are a few details relating to the spawning behaviour of N. ater and N. hyrtlii, which may give an indication of what to expect from the Rendahl's catfish. To quote from the afore mentioned reference book:

"... N. ater apparently swim together in pairs immediately prior to spawning with the head pointed downward coupled with frequent tumbling and intertwining, whereas in N. hyrtlii, the male follows the female, holding the snout adjacent to the female's flank, followed by a short dart ahead to arch the body around the female's snout."

This would suggest that P. rendahli may also pair off in a similar manner, but this is an assumption. In that respect these fish do have superficial similarities with Corydoras spawning behaviour, but more observations are required to determine what goes on in the hours prior to the act of spawning and how and why pairs form together.

cheers,
Andrew

Hi,

It's done. I'd set a trio Porochilus in a 150 l tank with a big bamboo, really bushy, with lots of Java Moss and some caves and rolling stones on fine sand.
Temperature is on 29 °c (± 83°f).
They are now four days in the tank. When the sun begins to get down (a small lightning only on the tank), the smallest, wich I think it's a male, follows the two other one with twining around and touching the flanks of the biggest. Some touches to the genital papilla happen too.

All along the day, they stay in the Java moss. They only are active when feeding (bloodworms, brine shrimps, pellets). I will try with mussels meat (they are eating molluscs as it seems).

Tomorrow, I will try with a big water change, some degrees cooler.

I'll tell you the next step.

Cheers

Christian

Hi,

About Porochilus rendahli, another question is to know of the female or/and the male are guarding the eggs or if the fry happens over sand, rocks or even in full water.

If Andrew could help me...

Cheers

Christian

Christian, I can't find any details about P. rendahli spawning, but N. ater & N. hyrtlii are known to drop their eggs into the substrate, apparently a mix of gravel. Their eggs sink quickly and expand slightly as they absorb water.

Perhaps P. rendahli will spawn in a similar manner? If not above gravel, perhaps they will scatter eggs in plants, as this is where they spend most of their time. I would try to make both habitats available to your fish, the java moss would probably work well.

I can not find anything mentioned about parental care, although in the related species T. tandan the male guards the eggs (and in captivity so too does the female). However this species also builds large nests, and its behaviour is probably very different from the Rendahls.


On a side note, I've noticed that in the past weeks my largest Neosilurus hyrtlii has developed a swollen belly. I believe it to be a female and the other two I have I think are males. No unusual activity occurred after the last water change, but I will be keeping a close eye on them. Good luck to both of us!

cheers,
Andrew

Christian,

I have just returned from the ANGFA conference in Darwin where I met Dave Wilson who has successfully bred Porochilus obbesi. Unfortunately there are few details available - they spawned and grew in a 5,000l pond - but it suggests that the genus can be bred in captivity. Judging from the numbers in which many Neosilurus and Porochilus appear as juveniles, it seems that they are not too hard to raise.

I have also found an account of successful spawning of Neosilurus gloveri in an aquarium, it is in an old issue of Fishes of Sahul. I will dig it up and send you the relevant info.

Andrew

snowball wrote:Christian,

I have just returned from the ANGFA conference in Darwin where I met Dave Wilson who has successfully bred Porochilus obbesi. Unfortunately there are few details available - they spawned and grew in a 5,000l pond - but it suggests that the genus can be bred in captivity. Judging from the numbers in which many Neosilurus and Porochilus appear as juveniles, it seems that they are not too hard to raise.

I have also found an account of successful spawning of Neosilurus gloveri in an aquarium, it is in an old issue of Fishes of Sahul. I will dig it up and send you the relevant info.

Andrew

Any chance I could have a copy too? I wonder if the information could be pulled together somehow for the site?

Jools

Sure thing Jools, I will see if I can get permission to reprint the entire article for Planet Catfish.