Growth, Survival and Cost-benefit Analyses of Nutrient Rich Small Indigenous Species in Carp Polyculture System under Barind Area in Rajshahi District of Bangladesh

Arjit Kumar Basak, Anik Talukdar, M. Rahman, Amrita Shaha, Jesmin Ara, Md. Akhtar Hossain
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Abstract

This study was conducted in Tanore upazila (sub district) of Rajshahi district, Bangladesh for a period of six months from July 2019 to December 2019. Investigation was carried into the economics of polyculture of Indian major carps with small indigenous fish species (SIS) Shing          (H. fossilis), Magur (C. batrachus), and Pabda (O. pabda). The species composition was carps with shing (T1), carps with Magur (T2), carps with Pabda (T3) and only carps (T4). The economic feasibility of four different combinations was analyzed on the basis of the expenditure incurred and total return from sale price of fish in the local market. The net benefits per hectare from 6 months culture period for T1, T2, T3 and T4 were Bangladesh currency (Taka) as BDT. 635730.42, 805548.25, 580948.95 and 291489.07, respectively which largely reflected the gross fish production levels of 7680.42 ± 6.68, 8324.94 ± 16.64, 7581.13 ± 24.94 and 6344.55 ± 10.30 kg ha-1. However, carp polyculture with Magur (T2) provided highest benefit (BDT. 805548.25 ha-1), followed by carps-shing polyculture (BDT. 635730.42/ha-1), carps-Pabda polyculture (BDT. 580948.95 ha-1) and only carps (BDT. 291489.07 ha-1). BCR (Benefit Cost Ratio) was obtained highest in Carp-Magur polyculture, followed by carp-shing and carp-Pabda polyculture systems. So, Carp-Magur polyculture may be better as it has ensured better production of protein enriched SIS Magur and also economic point of view and this system is encouraging for rural people because they would get Magur regularly for consumption and carps as a cash crop.
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孟加拉国Rajshahi地区Barind地区鲤鱼混养系统中富营养小型本地物种的生长、生存和成本效益分析
该研究于2019年7月至2019年12月在孟加拉国拉杰沙希区Tanore upazila(街道)进行,为期6个月。对印度主要鲤鱼与本地小型鱼类(SIS) Shing (H. fossilis)、Magur (C. batrachus)和Pabda (O. Pabda)混养的经济学进行了调查。鱼种组成为带shing鲤(T1)、带Magur鲤(T2)、带Pabda鲤(T3)和只有鲤(T4)。根据鱼在当地市场的销售价格所产生的支出和总收益,分析了四种不同组合的经济可行性。T1、T2、T3和T4在6个月的栽培期内每公顷的净效益以孟加拉国货币(塔卡)作为BDT。分别为635730.42、805548.25、580948.95和291489.07,在很大程度上反映了鱼类总产量水平为7680.42±6.68、8324.94±16.64、7581.13±24.94和6344.55±10.30 kg ha-1。然而,与Magur (T2)混养的鲤鱼具有最高的BDT效益。805548.25 ha-1),其次是鲤鱼-鱼复合(BDT)。635730.42/ha-1),鲤鱼- pabda混养(BDT。580948.95 ha-1),仅限鲤鱼(BDT)。291489.07农业)。鲤鱼-马格尔混养体系的BCR(效益成本比)最高,其次是鲤鱼-盛和鲤鱼-帕布达混养体系。因此,鲤鱼-马古鱼混合养殖可能更好,因为它确保了富含蛋白质的SIS马古鱼的更好生产,而且从经济角度来看,这个系统对农村人口来说是鼓舞人心的,因为他们可以定期获得马古鱼供消费,而鲤鱼则是一种经济作物。
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