Wongyai Natkritta, Jutagate Achara, Grudpan Chaiwut, Jutagate Tuantong
Faculty of Agriculture, Ubon Ratchathnai University, Warin Chamrab, Ubon Ratchathani, 34190 Thailand.
Trop Life Sci Res. 2020 Jul;31(2):159-173. doi: 10.21315/tlsr2020.31.2.8. Epub 2020 Aug 6.
Condition index, reproduction and feeding of three non-obligatory riverine Mekong cyprinids namely , and were examined. The samples were from the Nam Ngiep (NN) River and Bueng Khong Long (BKL) Swamp, which are the representative of the lotic- and lentic-environments, respectively. These two habitats lay in the same geographical area but on the opposite banks of the Mekong mainstream. The samplings were conducted between May 2017 and April 2018. There were 365 , 259 and 298 samples in this study. The condition index of all three species were beyond 90% implying they can live well in both lotic and lentic environments. Reproductions of all three species were taken place in both environments with two peaks at the onset and end of rainy season. The samples from BKL showed early maturation than NN samples in all three (3) species. Feeding plasticity, though dominant by insects, was observed in spp., while can utilise any available detritus in both environments. Results clearly show that all the three selected non-obligatory riverine fish species can live very well in either lotic or lentic environments and imply that they can adjust themselves to reservoir environment.
对三种非 obligatory 湄公河鲤科鱼类（即 、 和 ）的状况指数、繁殖和摄食情况进行了研究。样本分别采自南涅普河（NN）和孔隆湖（BKL）沼泽，它们分别代表了流水环境和静水环境。这两个栖息地位于同一地理区域，但在湄公河主流的两岸。采样在2017年5月至2018年4月期间进行。本研究中有365份 样本、259份 样本和298份 样本。所有三种鱼类的状况指数均超过90%，这意味着它们在流水和静水两种环境中都能良好生存。所有三种鱼类在这两种环境中都有繁殖，在雨季开始和结束时有两个高峰。来自BKL的样本在所有三种鱼类中都比来自NN的样本早熟。摄食可塑性方面， 属鱼类虽以昆虫为主，但在 属鱼类中也有观察到，而 在两种环境中都能利用任何可得的碎屑。结果清楚地表明，所有三种选定的非 obligatory 河流鱼类在流水或静水环境中都能很好地生存，这意味着它们能够适应水库环境。 （注：原文中“non-obligatory”及一些物种名未给出具体中文，保留英文）
