27 Oct
2015
27 Oct
'15
12:21 p.m.
En francais au dessous
From: Christophe.D [mailto:christophe_otropic@yahoo.fr]
Sent: 27 October 2015 08:05
To: sarnissa-french-aquaculture Mailing List
Cc: sarnissa-african-aquaculture Mailing List
Subject: Re: [Sarnissa] Tilapia Fingerling Lesions Uganda - Tilapia Fingerling lésions
Ouganda
Dear all,
I have just seen the pics …… I don’t know if you find your problem but, looks like
saturation of gaz (N) ???? Maybe the first cause and certainly some parasite because your
fish are stressed.
Investigate your hydraulic to see what’s happen with this water who come from the ground :
altitude / deep of borehole / flow / T°C and atmosphéric condition can maybe be guilty;
All the best
Christophe Dupuy
- Expert en Aquaculture -
∼ ∼∼ ∼∼ ∼∼∼ ∼∼∼ ∼∼∼ ∼∼∼∼∼∼∼∼ ><))))°>
Mobile : + 33 (0)6 20 57 12 22
Skype : Aqualog2
@ : christophe_otropic@yahoo.fr<mailto:christophe_otropic@yahoo.fr>
Chers tous,
Je viens de voir les photos ...... Je ne sais pas si vous trouvez votre problème, mais,
ressemble à saturation de gaz (N) ???? Peut-être la cause première et certainement
parasite parce que vos poissons sont stressés.
Enquêter sur votre hydraulique pour voir ce qui ce passe avec cette eau qui viennent de la
terre: l'altitude / profondeur de forage / débit / T ° C et les conditions
atmosphériques peuvent peut-être être coupable;
Bonne chance
Christophe Dupuy
- Expert en aquaculture -
Le 26 oct. 2015 à 14:15, William Leschen
<william.leschen@stir.ac.uk<mailto:william.leschen@stir.ac.uk>> a écrit :
En francais au dessous
From: Lulijwa Ronnie Ronald [mailto:rlulijwa@yahoo.com<mailto:rlulijwa@yahoo.com>]
Sent: 24 October 2015 17:29
To: sarnissa-african-aquaculture Mailing List
Subject: Re: Tilapia Fingerling Lesions
Dear Members,
Could anyone have experienced these lesions in Tilapia fingerlings
If any, what could be the possible cause (fungal or bacterial?)
Nice evening
See below for more details
LULIJWA Ronald
Aquaculture Scientist
National Agricultural Research Organisation (NARO)
Rwebitaba Zonal Agricultural Research and Development Institute. P. O. Box, 96, Fort
Portal, Uganda.
________________________________
Dear Will,
These fingerlings are coming from earthen ponds, that gets water from an underground
spring connected to a farm reservior
The area of operation is at high altitude and average temperatures are around 26°C, water
quality is acceptable but with high levels of suspended solids and green water. These
fish receive a supplementary diet made of formulated floating feed, and there has been no
cases of mortality but that is the first case sofar reported. The stocking density is low
and fingerlings size is about 5g, originating from the same farm.
Thank you
Lulijwa Ronald
Msc Aquaculture
Bsc Fisheries and Aquaculture
Chers membres,
Pouvait-on connu ces lésions en alevins de tilapia
Le cas échéant, ce qui pourrait être la cause possible (fongique ou bactérienne?)
Bonne soirée
Voir ci-dessous pour plus de détails
LULIJWA Ronald
Aquaculture Scientiste
National Agricultural Research Organisation (NARO)
Rwebitaba Zonal Agricultural Research and Development Institute. P. O. Box, 96, Fort
Portal, Ouganda.
________________________________________
Cher Will,
Ces alevins sont en provenance des étangs de terre, qui obtient de l'eau d'une
source souterraine reliée à un reservior agricole
La zone d'opération est à haute altitude et les températures moyennes sont autour de
26 ° C, qualité de l'eau est acceptable, mais avec des niveaux élevés de solides en
suspension et l'eau verte. Ces poissons reçoivent une alimentation complémentaire en
aliments flottants formulé, et il n'y a eu aucun cas de mortalité, mais qui est le
premier cas rapporté so far. La densité de peuplement est faible et alevins taille est
environ 5 g, provenant de la même exploitation.
Merci
On Sat, Oct 24, 2015 at 9:07 PM, William Leschen
<william.leschen@stir.ac.uk<mailto:william.leschen@stir.ac.uk>> wrote:
Dear Ronald
Thank you – Ive compressed down the size of your photos – also made them lighter and
hopefully clearer - please can you resend again to the forum but this time include
some background information about the fingerlings themselves ie
From earthpond? Tank? Raceway? Hapa? Area/volume of pond? Tank etc
Water source Spring? River? Borehole? Other?
Water temp?
Water quality ? good ? cloudy ? high suspended solids?
Fed regularly? Which feed?
Mortalities? Nos per day ?
Size in g of fingerlings
Nos in pond ?Stocking density in pond? Tank? Etc
Other species in holding unit ? Polyculture or just tilapia
Origin of the tilapia fingerlings ? stocked from ?
If you can give these further details it will help people on the forum to give you a
better informed reply
Best wishes Will
From: Lulijwa Ronnie Ronald [mailto:rlulijwa@yahoo.com<mailto:rlulijwa@yahoo.com>]
Sent: 24 October 2015 17:29
To: sarnissa-african-aquaculture Mailing List
Subject: Re: Tilapia Fingerling Lesions
Dear Members,
Could any one have experienced these lesions in Tilapia fingerlings
If any, what could be the possible cause (fungal or bacterial)
Nice evening
LULIJWA Ronald
Aquaculture Scientist
National Agricultural Research Organisation (NARO)
Rwebitaba Zonal Agricultural Research and Development Institute. P. O. Box, 96, Fort
Portal, Uganda.
________________________________
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world (QS World University Rankings, 2014)
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