From: Karen L. Veverica [mailto:veverkl@gmail.com]
Sent: 27 October 2015 14:33
To: William Leschen
Subject: Re: Tilapia Fingerling Lesions Uganda - Tilapia Fingerling lésions Ouganda
these look like encysted trematodes. They could also be in the gills. Please poke the cysts and see if a small worm comes out. You should also look at the gills and check the kidney for similar cysts.
If it is trematodes, I will let you know more about my experience with these; mostly in Rwanda which is not too far from you. We had similar problems in Kenya but were able to manage around it.
Karen L. Veverica
Director, E.W. Shell Fisheries Research Center
School of Fisheries, Aquaculture and Aquatic Sciences
Auburn University, AL USA
office: 1-334-844-4667
cell: +1 334-332-1560
En francais au dessous
De: Karen L. Veverica [mailto: veverkl@gmail.com]
Envoyé le 27 Octobre ici à 2015 14h33
Pour: William Leschen
Sujet: Re: Tilapia Fingerling lésions Ouganda - Ouganda de Tilapia Fingerling
ceux-ci ressemblent trématodes enkystées. Ils peuvent également se présenter sous les branchies. S'il vous plaît fouiller les kystes et de voir si un petit ver sort. Vous devriez aussi regarder les branchies et vérifier le rein pour les kystes semblables.
Si elle est trématodes, je vous le ferai savoir plus sur mon expérience avec ces; la plupart du temps au Rwanda qui est pas trop loin de vous. Nous avons eu des problèmes similaires au Kenya mais nous avons pu gérer autour d'elle.
Karen L. Veverica
From: Lulijwa Ronnie Ronald [mailto:rlulijwa@yahoo.com]
Sent: 24 October 2015 17:29
To: sarnissa-african-aquaculture Mailing List
Subject: Re: Tilapia Fingerling LesionsDear 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> 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]
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.
The University is ranked in the QS World Rankings of the top 5% of universities in the world (QS World University Rankings, 2014)
The University of Stirling is a charity registered in Scotland, number SC 011159.