| dc.description.abstract | Cage culture of fish allows intensive production in water bodies without conventional
preparation for aquaculture. This is highly important to a country like Bangladesh, which has
a large amount of inland waters. Haor region of Bangladesh is blessed with huge potential of
fisheries. To meet up the growing demand of fish it needs to introduce aquaculture in haor
areas. Cage culture might be one of the suitable options for aquaculture in the floodplains of
haors. On the other hand, there are many ponds in haor area most of which become flooded
during monsoon. So it needs to introduce fast growing species like tilapia both in cages as
well as pond aquaculture. So the present study was undertaken to assess the production of
tilapia (Oreochromis niloticus) advanced fingerling in cages involving women in the haor
region of Bangladesh for a period of 52 days from 10
July 2013 in five villages
viz. Pangao, Dattagram, Dulpushi, Anwarpur and Dolua of Derai upazilla at Sunamganj
district. There were 5 treatments with 7 replicates each. A total of 35 cages were distributed
over 35 families. The size of each cage was 1m
th
th
June to 31
. The cages were settled up in nearby river
and canal of the said villages. In each treatment the differences was in stocking densities.
Stocking density was 800, 900, 1000, 1100 and 1200 in treatment-1, treatment-2, treatment-3,
treatment-4 and treatment-5, respectively. The mean initial body weights of fingerlings were
1.94g for all cages. Fingerlings were fed with floating commercial feed named mega feed
with protein percent of 35%. The final average weight varies between 42.7-46.2g in different
treatments. Average survival was found 97.8-99.1%. Specific growth rate observed almost
equal in all treatments 6.4-6.6%. Net yield varied between 33.8-49.4 kg m
3
-3
in different
treatments with comparatively higher (P<0.05) production in treatment-5. Financial return
was calculated Tk. 4705.7 ± 35.1, Tk. 5301.4 ± 23.7, Tk. 5870.6 ± 27.5, Tk. 6540.0 ± 28.8
and Tk. 7071.4 ± 70.8, in treatments 1, 2, 3, 4 and 5, respectively. Significantly higher
(P<0.05) return was found in treatment-5. Significantly higher (P<0.05) net benefit was also
observed in treatment-5. From this study it is found in terms of growth, production and
economics treatment-5 was best followed by treatment-4. Therefore it is suggested that tilapia
fry rearing in cages can be a good option for the farmers and stocking density 1100 and 1200
m
-3
is good for advanced fingerling production. Therefore, tilapia fingerling production in
cages can be considered as a good option for alternate income generation for the fisher
households involving women. | en_US |
