Abstract
The present experiment was carried out in the household ponds (0.04 to 0.08 ha in area with 1.3 to 2.4 m in depth) of small indigenous people at Barind Tract region, northwest Bangladesh during September, 2017 to June, 2018 to know the growth performance of bivalve with carp. Two different treatments with 3 replicates were used, in treatment one (T1) only the carp polyculture was performed and in treatment two (T2) carp and bivalve polyculture was performed. Good quality of carp fingerlings (Labeo rohita, Gibelion catla, Cirrhinus cirrhousus, Hypophthalmichthys molitrix and Ctenopharyngodon idella) and freshwater bivalve (Lamellidens marginalis) seeds were stocked in the ponds. Stocking density and size of the seeds were similar for all of the study ponds. During the experiment there were no significant differences was observed in growth performance of the fishes between the two different treatments (p<0.05). The weight gain was recorded for L. rohita 420.31 g in T1 and 436.25 g in T2, for G. catla 237.01 g in T1 and 329.66 g in T2, for C. cirrhosus 263.53 g in T1 and 301.74 g in T2, for H. molitrix 559.6 g in T1 and 593.57 g in T2, for C. idella 510.11 g in T1 and 619.57g in T2. The weight gain of L. marginalis was 12.3 g in T2. During this experiment the production of carp was recorded 2524.5 kg/ha in T1 and 2618.2 kg/ha in T2 and the bivalve production was 1284.4 kg/ha in T2. This study is the first report on growth performance of bivalve with carp in the Barind Tract region of northwest Bangladesh. The result of this study will be helpful for the development of bivalve aquaculture in this climatically vulnerable region. J. Bio-Sci. 29(2): 99-110, 2021 (December)
Highlights
Aquaculture is the farming and husbandry of aquatic organisms under controlled or semi-controlled conditions
The present experiment was conducted in the homestead ponds at Jugisho village of Tanore upazila under Rajshahi district in northwest Bangladesh for a period of 10 months during September 2017 to June 2018 (Fig. 1)
The experimental ponds were selected from the indigenous people community having 0.04 to 0.08 ha in area with 1.3 to 2.4 m in depth
Summary
Aquaculture is the farming and husbandry of aquatic organisms under controlled or semi-controlled conditions. With the increase in human population and diminished natural fisheries resources, aquaculture is rapidly gaining importance. Pond aquaculture is growing fast in many resource-constrained Asian countries (Hossain et al 2020). In order to maintain the present per capita fish demand, further growth of aquaculture production is needed as the supply through capture fisheries cannot grow any more. Aquaculture has turned to a promising economic sector in Bangladesh. Aquaculture contributes over 50% of the total fish production of Bangladesh (DoF 2017). Advancement of technologies leads to aquaculture as a more profitable approach day by day
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