CAJ | 학술논문

以高密度的黄颡鱼（ Pelteobagrus fulvidraco）－鳙（ Aristichthys nobilis）分隔养殖池塘为研究对象，分析养殖期间（2013年4月—10月）池塘浮游生物和水体理化因子的变化情况。结果显示，池塘水体温度、 pH、 DO和总氮指标在养殖期间存在显著差异（ P＜0．01）。 Duncan′s多重比较显示，温度在6—8月显著高于其他时间（ P＜0．05）；总氮在7—9月的含量显著升高（ P＜0．05）；氨氮和亚硝态氮在8—10月的含量明显升高（ P＜0．05）。池塘浮游生物的变化表现为：枝角类和桡足类物种数随养殖时间的延长而逐渐减少，其中秀体溞属（ Diaphanosoma）占优势；轮虫物种数呈上升趋势，其中臂尾轮虫属（ Brachionus）占优势；原生动物物种数在各月份之间差异不明显，以球吸管虫属（ Sphaerophrya）为优势种；藻类物种数呈先上升再下降的趋势，其中绿藻门（ Chlorophyta ）种类占优势，其次为裸藻门（ Euglenophyta ）种类。基于Dice相似系数的UPGMA聚类和Pearson相关系数的MDS排序均显示池塘水体中浮游生物群落在整个养殖期间可分为2大类，4、5、6、7月各样本聚在一起，8、9、10月各样本聚在一起，表现为前4个月（4—7月）相似性高，而后3个月（8—10月）相似性高；说明池塘浮游生物的群落结构随养殖时间延续发生了改变。
이고밀도적황상어（ Pelteobagrus fulvidraco）－용（ Aristichthys nobilis）분격양식지당위연구대상，분석양식기간（2013년4월—10월）지당부유생물화수체이화인자적변화정황。결과현시，지당수체온도、 pH、 DO화총담지표재양식기간존재현저차이（ P＜0．01）。 Duncan′s다중비교현시，온도재6—8월현저고우기타시간（ P＜0．05）；총담재7—9월적함량현저승고（ P＜0．05）；안담화아초태담재8—10월적함량명현승고（ P＜0．05）。지당부유생물적변화표현위：지각류화뇨족류물충수수양식시간적연장이축점감소，기중수체소속（ Diaphanosoma）점우세；륜충물충수정상승추세，기중비미륜충속（ Brachionus）점우세；원생동물물충수재각월빈지간차이불명현，이구흡관충속（ Sphaerophrya）위우세충；조류물충수정선상승재하강적추세，기중록조문（ Chlorophyta ）충류점우세，기차위라조문（ Euglenophyta ）충류。기우Dice상사계수적UPGMA취류화Pearson상관계수적MDS배서균현시지당수체중부유생물군락재정개양식기간가분위2대류，4、5、6、7월각양본취재일기，8、9、10월각양본취재일기，표현위전4개월（4—7월）상사성고，이후3개월（8—10월）상사성고；설명지당부유생물적군락결구수양식시간연속발생료개변。
Plankton community structures and physicochemical factors were studied in pond polyculture modes with high in -tensity Pelteobagrus fulvidraco and Aristichthys nobilis from April to October in 2013 .The results showed that: the water temperature, pH and the concentrations of DO and total nitrogen had significant differences during the breeding period (P<0.01).Furtherly, Duncan′s multiple comparison revealed temperature was significantly higher during June , July and August ( P<0.05 ); total nitrogen content increased significantly in July , August and September ( P<0.05 ) , while the concentrations of ammonia nitrogen and nitrite nitrogen increased significantly in August , September and October ( P<0.05 ) .In terms of the plankton communities , results showed that the species number of cladocera and copepods de -creased with prolongation of culture time , while the genus Diaphanosoma was dominant .However , rotifer species number was on the rise , and the genus Brachionus was dominant .There are no significant decreases for species numbers of Proto-zoa during the breeding period , and the genus Sphaerophrya was dominant .The algae species number increased first and then decreased.Of which, the phylum Chlorophyta was dominant , followed by phyla Euglenophyta .In addition, UPG-MA clustering and MDS ordination respectively based on Dice and Pearson similarity coefficient showed that plankton com -munity structure separated two groups during the breeding period , the former four months (April, May, June and July)clustered one group while the other months (August, September and October) clustered another group.