Comparison of planktonic microbial abundance and dissolved oxygen consumption between the aquaculture ponds of mudskippers and shrimps in the Mekong Delta, southern Vietnam
Comparison of planktonic microbial abundance and dissolved oxygen consumption between the aquaculture ponds of mudskippers and shrimps in the Mekong Delta, southern Vietnam
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DOI：
10.1007/s12562-016-1000-1
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发表时间：
2016-07
影响因子：
1.9
通讯作者：
M. Wada;Fumi Mori;K. Yokouchi;Mitsuharu Yagi;T. Takita;A. Ishimatsu;M. Iwataki;Kazuya Takahashi;H. V. Mai;T. T. Vo-T.;Hung Phuoc Ha;D. D. Tran-D.
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文献类型：
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作者：
M. Wada;Fumi Mori;K. Yokouchi;Mitsuharu Yagi;T. Takita;A. Ishimatsu;M. Iwataki;Kazuya Takahashi;H. V. Mai;T. T. Vo-T.;Hung Phuoc Ha;D. D. Tran-D.
过去10年来，在越南南部湄公河三角洲省份，弹涂鱼的养殖规模迅速扩大。这种鱼的空中呼吸能力使其能够在没有通风或很少交换水的土池塘中养殖。我们比较了鱼类养殖池塘中藻类和细菌细胞的组成和丰度、微生物的耗氧量以及溶解氧（DO）浓度的每日波动，并将这些数据与同一地区虾类养殖池塘的数据进行了比较。我们发现藻类的数量持续增加（高达1.8 × 107细胞/ml），主要由“小球藻”组成。，鱼塘的细菌（超过108个/毫升）比虾塘多。鱼塘水体的耗氧速率能够在夜间的几个小时内耗尽DO，这一点被鱼塘记录的一系列24小时DO测量数据所证实。目前的研究是第一个清楚地证明了极高丰度的微生物和由此导致的夜间缺氧在p水中的流行。elongatusaquaculture池塘。
Aquaculture of the mudskipperPseudapocryptes elongatushas expanded rapidly over the past 10 years in the provinces of the Mekong Delta of southern Vietnam. The fish’s capacity for aerial breathing enables its farming in earthen ponds with no aeration or little water exchange. We compared the composition and abundance of algal and bacterial cells, the rates of oxygen consumption by microorganisms, and daily fluctuations in dissolved oxygen (DO) concentration in fish aquaculture ponds, and compared these to data obtained from shrimp aquaculture ponds in the same locality. We found consistently higher numbers (up to 1.8 × 107cells/ml) of algae, comprising mostly “Chlorellasp.”, and of bacteria (over 108cells/ml) in fish ponds than in shrimp ponds. The rate of oxygen consumption in the water of the fish ponds was able to deplete DO within a few hours at night, which was corroborated by a series of 24-h DO measurement data recorded in the fish ponds. The present study is the first to clearly demonstrate the extremely high abundance of microorganisms and the resulting prevalence of nighttime anoxia in the water ofP. elongatusaquaculture ponds.