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strain and muscle strain (72%) were the highest Mymensingh, Bangladesh. Bang. J. Fish. Res.,
among the women workers with high recurrence.
Most of the women workers strongly agreed on the
issues of better salary (100%), transportation by
employer (76%), working for more than eight
hours (74.66%), free medicare (94%), safe
drinking water (92%), maternity leave (86.66%)
and trade union rights (83.33%).
533 CHOWDHURY, M.M.; RAKNUZZAMAN,
M. (Dept. of Fisheries, Dhaka University, Dhaka)
& IQUBAL, K.F. (Dept. of Environmental
Science, State University of Bangladesh, Dhaka).
Control of Argulus Sp. Infestation in Goldfish
(Carassius Auratus) with Sumithion. Bang. J.
Zool., 2006, 34(1), 111-115.
An effective does of organophosphate pesticide.
Sumithion was determined in controlling Argulus
sp. Infection In Goldfish (Carassius auratus)
bought from market. The fishes were reared in
laboratory condition maintaining the following
physico-chemical variables: water temperatures
°
varied from 26.50 ± 0.55 to 27.00 ± 0.12 C, DO
ranged from 6.32 ± 0.15 to 6.80 ± 50 mg/1. free
CO 2 ranged from 10.01 ± 0. 12 to 1 1.20 ± 0.50
mg/1 and pH varied from 7.60 ± 0.30 to 7.70 ±
0.20. Four dosages were used, such as 0.01, 0.05,
0.1 and 0.2 ppm with three replicates for each.
After 48 hours of treatment, 0.01 and 0.05 ppm
failed to control Argulus sp. infection as the fishes
were reared for 14 days after the treatment. 100%
mortality of Argulus sp. was achieved with 0.1
ppm with a minimum deleterious effect on the
fishes. Treatment with 0.2 ppm showed abnormal
behavior resulting in death.
534 FARUK, M.A.R. (Dept. of Aquaculture,
Bangladesh Agricultural University, Mymensingh).
Health and disease status of Thai pangas, Pangasius
hypophthalmus cultured in rural ponds of
185
2005, 9(1), 51-53.
Thai pangas, Pangasius hypophthalmus is one of
the important aquaculture species in Bangladesh.
Over the last few years spectacular development
has been taking place in Thai pangas farming in
Mymensingh district. Due to availability of easy
breeding and culture techniques as well as quick
return, more and more people are converting their
rice fields into pangas farms overnight. The present
study was carried out to examine health and
disease status of Thai pangas mainly through
clinical, histopathological and bacteriological
techniques. In addition, for collecting primary data
on disease and health status of Thai pangas and the
resultant socioeconomic impacts on rural
households, questionnaire interview and
participatory rural appraisal tools were used with
selected farming households in three upazilas of
Mymensingh district. The most prevalent diseases
as reported by the farmers were red spot, followed
by anal protrusion, tail and fin rot, pop eye, dropsy
and gill rot. Other conditions like cotton wool type
lesion, ulceration and white spot were reported but
with lower incidence. Four isolates of Aeromonas
hydrophila were recovered from kidney and lesion
of diseased fish. Hemorrhage over the body
especially near mouth and caudal region was
noticed in the fishes associated with aeromonad
infection. Internally, kidney, liver and spleen
became swollen and enlarged. The isolates varied
with their pathogenicity. All the four isolates were
sensitive to Nitrofurantoin, Cotrimoxazole and
Tetracycline but were resistant to Amoxycilline.
An attempt was made to treat diseased fish with
extracts from neem leaf, garlic and turmeric.
Recovery of infection was monitored through
mortality and histopathology. General
histopathological changes of different organs were
also studied. Extract from neem (Azadirachta
indica) leaf gave better result. Telangiectasis,