CAJ | 학술논문

为了探讨密度胁迫对日本囊对虾(Marsupenaeus japonicus)生长、存活及水质因子的影响，作者设置了100尾/m2(DD)、200尾/m2(GD)、400尾/m2(GZ)、600尾/m2(GG)4个养殖密度，分析了不同养殖密度下日本囊对虾的生长量、存活率、肥满度及水质因子的差异。结果表明，实验所监测的水质因子均在对虾生长的安全阈值内，氨态氮、亚硝态氮、总氮和总磷含量表现出随养殖密度增加逐渐升高的趋势；体长和体质量增长量、存活率与养殖密度呈负相关，其中存活率处理间均达到极显著水平(P<0.01)，且当养殖密度高于200尾/m2时存活率迅速降低；低养殖密度(DD)处理的对虾肥满度与其他处理间差异均达到显著水平(P<0.01)。因此，在相似养殖条件下，日本囊对虾的适宜养殖密度应该不高于200尾/m2。本实验过程中，各处理间水质因子均在对虾生长的适宜范围内，说明水质不是造成对虾死亡的主要原因。所以，推测密度胁迫可能是造成日本囊对虾存活率低的主要原因。
위료탐토밀도협박대일본낭대하(Marsupenaeus japonicus)생장、존활급수질인자적영향，작자설치료100미/m2(DD)、200미/m2(GD)、400미/m2(GZ)、600미/m2(GG)4개양식밀도，분석료불동양식밀도하일본낭대하적생장량、존활솔、비만도급수질인자적차이。결과표명，실험소감측적수질인자균재대하생장적안전역치내，안태담、아초태담、총담화총린함량표현출수양식밀도증가축점승고적추세；체장화체질량증장량、존활솔여양식밀도정부상관，기중존활솔처리간균체도겁현저수평(P<0.01)，차당양식밀도고우200미/m2시존활솔신속강저；저양식밀도(DD)처리적대하비만도여기타처리간차이균체도현저수평(P<0.01)。인차，재상사양식조건하，일본낭대하적괄의양식밀도응해불고우200미/m2。본실험과정중，각처리간수질인자균재대하생장적괄의범위내，설명수질불시조성대하사망적주요원인。소이，추측밀도협박가능시조성일본낭대하존활솔저적주요원인。
To examine the effects of density-stress on growth, survival rates and water quality during Marsupenaeus japonicas farming, four stocking densities (100 (DD), 200 (GD), 400 (GZ) and 600 (GG) individuals/m2) were set in this study. The body length, body weight, survival rate and water quality factors under different farming densities were determined. The results showed that the water quality factors were all within the safe range for shrimp growth. The concentrations of TAN, NO2-N, TN and TP increased with the increase of stocking density. The gain of shrimp weight, and length and survival rate reduced with the increase of stocking density. The survival rate reduced sig-nificantly when the stocking density was more than 200 individuals/m2. The relative fatness had significant differ-ence between DD and other treatments (P<0.01). This study suggests that the suitable stocking density for M. ja-ponicus is less than 200 individuals/m2. Furthermore, the density-stress, not the water quality might be the main cause resulting in low survival rate of shrimp.