In English below

Bonjour à tous,

Nous avons eu le même problème des faibles taux de survie des juvéniles de poisson-chat africain Djo provient principalement de cannibalisme, mais a réussi à surmonter ce problème par quatre procédures:
1. Le classement des alevins chaque 8-10 jours (pas moins et pas plus).
2. Dépôt direct alimentaires (rotifères) pour la nouvelle alevins hachurée.
3. Construire petite brique plus approprié pour le poisson-chat de fingerlings de réservoirs d'élevage les hapas de charbon net.
(Et la quatrième procédure était de réduire l'agressivité des géniteurs, si vous n'appréhendé à partir de ce problème, vous pouvez l'éliminer)
Les mâles et les femelles 4. Injecter avec ovaprim ® réduit l'agressivité et nombre accru mà d'œufs.


Meilleures salutations,
Nabil

> <>> <>> <> <> <<> <<> <
Dr. Nabil A. Ibrahim,
Scientifique, Aquaculture durable (Genetics)
T: + 2055-3404227, Abbassa, Abou Hammad, Sharkia, Egypte GMT + 2
      - 3405579 (Ext 222.)
M: + 2010-20043128, PO Box 1261 Maadi, Le Caire, Egypte-11728-
Skype: nabibr1
F: + 20 55 3405578 www.worldfishcenter.org

From: Ibrahim, Nabil Ahmed (WorldFish) [mailto:N.Ibrahim@cgiar.org]
Sent: 08 November 2016 13:34
To: William Leschen <william.leschen@stir.ac.uk>; sarnissa-french-aquaculture Mailing List <sarnissa-french-aquaculture@lists.stir.ac.uk>
Subject: RE: Problems with survival rates of Clarias juveniles in the hatchery ....

Dear All,

We had the same problem of low survival rates of juveniles of African catfish which mainly came from cannibalism, but we managed to overcome this problem through the following four procedures:

1. Grading the fry each 8 – 10 days (not less and not more).

2. Introduced live food (rotifers) for the new hatched fry.

3. Built small brick tanks which is more suitable for rearing the catfish fingerlings than net hapas.   

(And the fourth procedure was to reduce the aggressiveness of the broodstock, if you don’t suffering from this problem you can eliminate it)

4. Inject both males and females with ovaprim ® which reduced the aggressiveness and increased egg numbers.

Hope to find it useful.

Best regards,

Nabil  

><> ><> ><> <>< <>< <><
Dr. Nabil A. Ibrahim,
Scientist, Sustainable Aquaculture (Genetics)

T:  + 2055-3404227,            Abbassa, Abou Hammad, Sharkia, Egypt GMT+2

      - 3405579 (Ext. 222)

M:+2010-20043128,           PO Box 1261 Maadi, Cairo-11728- Egypt                                          

Skype: nabibr1

F: + 20 55 3405578              www.worldfishcenter.org

From: Sarnissa-african-aquaculture [mailto:sarnissa-african-aquaculture-bounces@lists.stir.ac.uk] On Behalf Of William Leschen via Sarnissa-african-aquaculture
Sent: Tuesday, November 08, 2016 11:37 AM
To: sarnissa-african-aquaculture Mailing List; sarnissa-french-aquaculture Mailing List
Subject: FW: Problems with survival rates of Clarias juveniles in the hatchery ....

Traduire en francais au dessus

From: Leslie [mailto:leslie@aquaafrica.co.za]
Sent: 08 November 2016 03:42
To: William Leschen <william.leschen@stir.ac.uk>; sarnissa-french-aquaculture Mailing List <sarnissa-french-aquaculture@lists.stir.ac.uk>
Subject: RE: Problems with survival rates of Clarias juveniles in the hatchery ....

Good morning Koba

With clients and on our own R&D facility we have put enormous effort into perfecting the survival and growth rate of African catfish over the past years.  I can tell you that there are several factors that are key to obtaining this, including optimising both water quality & feed, but even so a 50% survival is not realistic.  If you get a 20% survival from egg to 1kg you are doing well.

Regards,

Leslie

Bonjour Koba

Avec nos clients et notre propre centre de R & D, nous avons déployé des efforts considérables pour améliorer le taux de survie et de croissance du poisson-chat africain au cours des dernières années. Je peux vous dire qu'il ya plusieurs facteurs qui sont essentiels à l'obtention de ce, y compris l'optimisation de la qualité de l'eau et de l'alimentation, mais même si une survie de 50% n'est pas réaliste. Si vous obtenez une survie de 20% de l'œuf à 1kg vous faites bien.

Cordialement,
Leslie

From: Sarnissa-african-aquaculture [mailto:sarnissa-african-aquaculture-bounces@lists.stir.ac.uk] On Behalf Of William Leschen via Sarnissa-african-aquaculture
Sent: 07 November 2016 05:10 PM
To: sarnissa-african-aquaculture Mailing List; sarnissa-french-aquaculture Mailing List
Subject: Problems with survival rates of Clarias juveniles in the hatchery ....

English translation  below

From: AHOCOU Alexandre K [mailto:alexahocou@gmail.com]
Sent: 07 November 2016 12:48
To: William Leschen <william.leschen@stir.ac.uk>
Subject: Re: FW: [catfishfarmersnig] 10, 000 Catfish fingerlings available for sale in Mowe ( close to market) The power of networks.......

Bonjour à tous

Juste savoir si quelqu'un peut me donner des infos sur comment faire pour avoir un taux de survie d'au moins 50% des alevins de clarias gariepinus.

En effet, le taux d'éclosion est bon mais déja à partir du 3ème jour de nourrissage à l'artémia décapsulé on observe une forte mortalité et pour les jours suivants. Et pourtant on fait un bon siphonnage, l'eau (eau de forage à ph =5.3) sur les larves est renouvelée au moins 2 fois dans la journée après s'être oxigénée.

J'ai à un moment donné pensé que la cause de la mortalité des alevins pouvait être soit des virus, bactéries, levures ou champignons. Alors j'ai fait installer un stérilisateur UV de 30 watt à travers lequel l'eau transite avant d'atteindre les larves mais pas d'amélioration.

Si quelqu'un a donc une expérience en la matière je serai très sensible à sa bonne volonté de partage.

Merci

AHOCOU Koba

alexahocou@gmail.com

Tél : 90 22 15 83

2016-11-07 10:23 GMT+00:00 William Leschen via Sarnissa-african-aquaculture <sarnissa-african-aquaculture@lists.stir.ac.uk>:

Hello everyone
Just to  know if anyone can give me information on how to get a survival rate of at least 50%  catfish fingerlings gariepinus.
Indeed, the hatching rate is good but already from the 3rd day of feeding  decapsulated Artemia there are  high mortalities and for the following days. And yet we also  siphoned  off water and replaced it  (well water at pH = 5.3) for the   larvae  repeating this at least 2 times a day after the water  had been well  oxygenated.
At  first  I thought that the cause of the mortality of the fry could be either virus, bacteria, yeast or fungi. So I installed a 30 watt UV sterilizer through which the water passes before reaching the larvae but no improvement.
So if anyone has experience in this area I will be very willing to hear from you .
Thank you
Koba AHOCOU
alexahocou@gmail.com Tel: 90 22 15 83

Email and mobile phone whats app networks  developing  commercial aquaculture in  Nigeria

Dear all  

Please see below  note how this  simple yahoo   email catfish farmers forum in Nigeria  now with hundreds of members all over the country  are  buying and selling   not  just fingerlings and market fish    but also inputs  feed     fertilisers etc  also  for questions and advice   There is also a similar equally popular Nigerian catfish farmers mobile  phone  whats app group   which has daily  messages on  the same subjects and thus  huge networks of fish farmers communicating with each other  on daily   basis- In the last weeks on the   catfish farmers app they have been  discussing    market  process for  their grow out fish and how they can potentially    state and then country wide   try to control prices -  as their margins are ever declining due to the continually   increasing prices per  tonne  of commercial  feed in the country………………….

Please note   this for sarnissa  fish farmers  in other countries     -   also for those involved in   aquaculture  development across   SS Africa   both govts and also  national and international  donors and investors -  These email and mobile phone whats  app networks   cost next to nothing to set up and   normally just the  time of a dedicated individual to run them  -  And the impacts and concrete    positive outcomes from them are huge ….

Best wishes Will  

Sustainable Aquaculture  Research Group

Institute  of  Aquaculture, University of Stirling  UK

www.aqua.stir.ac.uk

Read about the Sustainable Aquaculture Research Group’s new projects and activities  at http://www.susaquastirling.net/

Follow Daily updated  Facebook  sites (news, publications, videos, employment, funding, investment and  other)   for:

Inst of  Aquaculture  Stirling  Scotland UK

SARNISSA African Aquaculture  Network

Aquaculture Enterprise Malawi

SEAT Sustaining Ethical Aquaculture  Trade Asia (SEAT)

From: catfishfarmersnig@yahoogroups.co.uk [mailto:catfishfarmersnig@yahoogroups.co.uk]
Sent: 07 November 2016 09:03
To: catfishfarmersnig <catfishfarmersnig@yahoogroups.co.uk>
Subject: [catfishfarmersnig] 10,000 Catfish fingerlings available for sale in Mowe ( close to market)

Dear Farmers,
Good morning.

We are offering 10,000 Catfish ( Clarias Garipenus) fingerlngs for sale at our farm site in mowe.

Serious buyers should please call Okey on 09034871998 for pricing information and pickup arrangements.

Regards and God Bless,
OkeE

sent from myMTN Sm@rtphone

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