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with rice bran and mustard oil cake (3:1). Soft has no additional advantages on breeding
green grass and banana leaves were provided performance of A. testudineus. Therefore, single
mainly for grass carp. At harvest, the production injection may be preferred over the second
obtained in treatments 1, 2 and 3 were injection for breeding of this fish.
2,325±74.75, 2,620±49.66 and 2,982± 171.52
kg/ha, respectively. The results demonstrated 574 MAHMUD, T.A. & BANU, G.R.
higher growth of fish in treatment 1 than those of (Fisheries and Marine Resource Technology
treatments 2 and 3. However, treatment 3 Discipline, Khulna University, Khulna).
contributed relatively higher production than those Commonly Used Chemotherapeutics in Fish
of treatments 1 and 2, whereas, highest net benefit Hatcheries at Jessore Sadar Upajila, Bangladesh.
was received from treatment 2. South Asian J. Agric., 2006, 1(2), 1-4.
573 MAHMOOD, S.U. (Dept. of Zoology, Aquaculture in Bangladesh is largely of extensive
Dhaka University, Dhaka). Comparison Between type and the available information on the use of
Single and Double Injection of Pituitary Gland chemotherapeutics in culture systems is very
(Pg) on the Breeding Performance of Climbing limited. Concerning this, a field survey was
Perch, Anabas Testudineus (Bloch). J. Bio-Sci., conducted from May to July, 2005 to study various
2006, 14, 57-60. drugs and chemicals used in fish hatcheries in
brood fish management and fry production. The
An investigation was carried out to study the data were collected from twelve fish hatcheries
effects of single and double injection of given dose from various thanas (Chandra, Arabpur, Palpara
of pituitary gland (PG) on the breeding etc.) of Jessore sadar upazilla, Jessore. The results
performance viz., ovulation response, fertilization, of the investigation on hatcheries revealed that
and hatching of climbing perch, Anabas different types of antibiotics (oxytetracycline,
testudineus was tested. Pituitary gland dose of 1.2 erythromycin, chloramphenicol, oxolinic acid),
mg/l00g was used in this experiment. Twenty inseclisides (sumithion, nogos, dipterex, ustaad
female fish was arranged into two treatments: T 1 etc.) and other chemicals (malachite green, copper
and T 2, each with 10 replications. In T 1, the entire sulphate, bleaching powder, methyline blue, quick
dose was administered in a single injection and in lime etc.) had been used in successful hatchery
T 2 the same dose was given in two equal injections operations to prevent various bacterial diseases
three hr apart. The experiment was laid in (vibriosis, fin and tail rot disease, abdominal
completely randomized design (CRD). It was dropsy, pseudomonad infection etc.). Among the
found that administration of PG in split doses antibiotics used in hatcheries, oxytetracycline was
(double injection) had no additional advantages the most common. The result also revealed that
(ovulation 100%, fertilization 81.56% and hatching most of the hatchery operators did not follow
72.68%) over the single injection (ovulation 100%, proper application methods. Urgent initiatives
fertilization 83.03% and hatching 75.48%) should be undertaken so that the farmers as well as
treatment. Similarly, the ovulation time of the fish hatchery operators could be able to apply various
did not vary significantly in either single or double chemotherapeutics properly. Further research must
injection of PG (single injection 7.12 hr; double be done on recommended dosages, usages, method
injection 7.20 hr). The results demonstrated that of application and effectiveness of various
splitting of pituitary gland dose (double injection)
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