Carp production using domestic sewage. - Central Inland Fisheries ...

Table 1 : Commom diseases of fishes in sewage-fed ponds
r.
Sl. DiseaseName organism Causative host
- Dropsy Aeromonas sp. Indian of
Incidence Symptoms of
disease
Clinical signs
Predisposing factors
Remedial
measures
2. Tail & fin rot -do- -do-
Summer
months
-do~
Accumulation of Dysfunction of
water in body ca- kidney.
vity or scale pockets.
Whitish margin in Putrifaction of fins
fins.
High organic load at
pond bottom.
Maintenance of pond
sanitation 100. mg of
terramycin or sulphadiazine
per kg of fish
feed to be supplemented
at the tune of 3% of
the body weight.
-do-
\0
3. Myxosporidiasis.
-do- Myxobolus sp. Winter
Thelohanellus months
sp.
Chloromyxum
White cysts on Excessive secretion of Overstocking presence of
gills and body, mucus, perforation of sporcs in the ecosystem.
reduced appetite scales, clubbed gill
and weakness. filaments.
Maintenance of pond
sanitation, thinning of
pupolation. Provision
of yeast in feed.
sp.
4. Trichodinosis -do- Trichodina sp. Post mon- Frayed fins, ex_ Pale gill, worn out
soon & cessive secretion gill filaments.
winter of mucus.
months.
5., Dactylogy- -dorosis
& Gyrodactylosis.
6. Argulosis
Dacty/ogyrus
spp.
Gyrodactylus
sp.
-do- Argulus sp.
-do-
Summer
& premonsoon
months.
Fading of colour Excessive scretion of
dropping & fold- mucus, damage of
ing of fins, surfac- gill epithelium.
ing & splashing.
Rubbing body Excitation, extra pigagainst
pond dy- mentation.
kes, splashing.
Higher organic load at
pond bottom, chronic exposure
to low D.O, low
apetite in winter.
-do-
-do-
Higher organic load at
pond bottom.
Maintenance of pond
sanitation. Dip treatment
in 2-3% NaCl for
3-5 minutes.
Dip treatment in 2-3%
NaCl for 3-5 minutes.
pond
sanitation.