En francais au dessous

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 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.


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