Floodplain wetlands located in Ganga-Brahmaputra basin are some of the major inland fisheries resources of India with substantial resource size of 554,213 ha. These resources are amenable to capture fisheries and fisheries enhancement. The Guwahati Regional Centre of Indian Council of Agricultural Research-Central Institute of Fisheries Research Institute, Barrackpore, West Bengal, India has developed protocols for scientific fish stock enhancement (through supplementary stocking) for floodplain wetlands (beels) of Assam. These enhancements aim to increase fish yield based on extensive field studies in the beels of the state during 2007–12. In order to assess the impact of fish stock enhancement following the Institute's guidelines, data on fish production of 183 beels under the administrative control of Assam Fisheries Development Corporation Ltd., Guwahati, India were collected and analysed for the period from 2007–08 to 2016–17. The data were analysed for two periods of 5 years each (2007–08 to 2011–12: period-I and 2012–13 to 2016–17: period-II) for unstocked beels (that are not subjected to supplementary stocking, thereby representing capture fisheries) and stocked beels (where supplementary stocking with Indian major and minor carps for fish stock enhancement is practised) in reference to different agro-climatic zones of Assam. The average fish yield from unstocked beels (96 no.) was 156.6 kg ha-1yr-1 during period-I, which increased to 206.4 kg ha-1yr-1 during period-II, showing an increase of 31.8% over the five-year period. As much as 47.5% of the beels (87 no.) of the state are now subjected to supplementary stocking for fish stock enhancement. The average fish yield rate of stocked beels was 258.5 kg ha-1yr-1 during period-I, which increased to 455.2 kg ha-1yr-1 during period-II. Thus, average fish yield rates increased as much as 76.1% over the five year periods in stocked beels showing that supplementary stocking resulted in significant enhancement of fish production from the beels of Assam after the Institute's intervention.

中文翻译：

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印度阿萨姆邦不同农业气候区鱼类种群增加对洪泛区湿地鱼类产量的影响

位于恒河-布拉马普特拉河盆地的泛滥平原湿地是印度主要的内陆渔业资源之一，资源规模可观，达 554,213 公顷。这些资源可用于捕捞渔业和渔业增强。位于印度西孟加拉邦巴拉克波尔的印度农业研究理事会古瓦哈蒂区域中心 - 中央渔业研究所制定了阿萨姆邦洪泛区湿地（野牛）科学鱼类资源增加（通过补充放养）的协议。这些改进旨在根据 2007-12 年间对该州贝类进行的广泛实地研究来提高鱼类产量。为了根据研究所的指导评估鱼类种群增强的影响，收集并分析了 2007-08 年至 2016-17 年期间印度古瓦哈提阿萨姆渔业发展有限公司行政控制下的 183 条蜜蜂的鱼类产量数据。数据分析了两个时期，每个时期为 5 年（2007-08 年至 2011-12 年：第一期和 2012-13 年至 2016-17 年：第二期），用于未放养的蜜蜂（未进行补充放养，从而代表根据阿萨姆邦不同的农业气候区，进行捕捞渔业）和放养比目鱼（在这些地方补充放养印度主要和小型鲤鱼以增加鱼类资源）。第一期非放养蜂（96 号）的平均鱼产量为 156.6 kg ha-1yr-1，第二期增加到 206.4 kg ha-1yr-1，比第五期增加了 31.8%。年期间。多达 47.5% 的蜜蜂（87 号）) 国家的鱼类资源增加现在受到补充放养。第一期放养黄蜂的平均鱼产量为 258.5 kg ha-1yr-1，第二期增加到 455.2 kg ha-1yr-1。因此，在五年内放养的比目鱼平均鱼产量增加了 76.1%，这表明在研究所的干预后，补充放养导致阿萨姆邦比目鱼的鱼类产量显着提高。