-----Original Message----- From: Ingénieur Halieute [mailto:hulianzangue@gmail.com] Sent: 08 November 2016 10:23 To: William Leschen <william.leschen@stir.ac.uk> Subject: Re: Problems with survival rates of Clarias juveniles in the hatchery .... bien vouloir me contacter au +237 676840456 pour expertise conseils pour votre soucis larvaire. 2016-11-07 16:10 UTC+01:00, William Leschen via Sarnissa-african-aquaculture <sarnissa-african-aquaculture@lists.stir.ac.uk>:

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<mailto: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<mailto: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<mailto: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

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From: catfishfarmersnig@yahoogroups.co.uk<mailto:catfishfarmersnig@yahoogrou ps.co.uk> [mailto:catfishfarmersnig@yahoogroups.co.uk<mailto:catfishfarmersnig@y ahoogroups.co.uk>] Sent: 07 November 2016 09:03 To: catfishfarmersnig <catfishfarmersnig@yahoogroups.co.uk<mailto:catfishfarmersnig@yahoogro ups.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

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-- Hulian ZANGUE Ingénieur Conception Aquaculture Responsable des Projets Cameroun Industrie & Service BP. 5770 Douala, Siège social: Douala - Akwa Portable: (237) 699686639 Bureau: (237) 233 42 39 27