论文部分内容阅读
万氏对虾(Penaeus vannamei)稚虾(平均最初体重=1.6g)在盐度5,15,25,35和49×10~(-3)下养殖35d。在最低盐度5和15×10~(-3)中获得了最大平均最后体重和大于2g/周的生长。平均最后体重在5和15×10~(-3)下并没有明显地差异,但比在较高的盐度下要明显地大一些。在25和35×10~(-3)盐度下的平均最后体重没有明显差异,但是比在盐度49×10~(-3)下要明显大些。在一定盐度下的平均最后体重是12.4g(5×10~(-3)、12.2g(15×10~(-3)),10.8g(25×10~(-3)),11.1g(35×10~(-3))和9.8g(49×10~(-3))。在各种盐度中存活率没有明显差异。第2个试验组的稚虾(平均最初体重=2.2g)在有 IHHNV(传柒性皮下和造血组织坏死病毒)感染的情况下,同时在25×10~(-3)和49×10~(-3)盐度下进行比较。其生长情况相似,而且在25×10~(-3)比49×10~(-3)有更大的平均最后体重。此外,个体和不同盐度之间明显地相互作用(双向方差分析,P=0.035)表明:带 IHHNV 阳性个体在高盐度下具有相对低的生长。在第2个试验组中,对虾平均最后体重分别为10.3g(25×10~(-3))和8.5g(49×10~(-3))。当对虾未受 IHHNV 感染时,则存活率在各种盐度下就没有明显地差异。
Penaeus vannamei juveniles (average initial body weight = 1.6 g) were cultured for 35 days at salinities of 5, 15, 25, 35 and 49 x 10 ~ (-3). The maximum average final body weight and the growth of more than 2 g / week were obtained in the lowest salinity 5 and 15 × 10 -3. The average final body weight did not differ significantly at 5 and 15x10 ~ (-3), but was significantly larger than at higher salinity. The average final body weight was not significantly different at 25 and 35 × 10 -3 salinity, but significantly greater than at salinity 49 × 10 -3. The average body weight at a certain salinity was 12.4 g (5 × 10 -3), 12.2 g (15 × 10 -3), 10.8 g (25 × 10 -3), 11.1 g (35 × 10 -3) and 9.8 g (49 × 10 -3), respectively.No significant difference in survival was observed among all salinities.The juvenile shrimps in the second experimental group (mean initial body weight = 2.2 g) Comparisons between 25 × 10 -3 and 49 × 10 -3 salinity in the presence of IHHNV (disseminated subcutaneous and hematopoietic necrosis virus), similar in growth , And had a greater mean final body weight at 25 × 10 -3 than 49 × 10 -3 In addition, there was a clear interaction between individuals and different salinities (two-way ANOVA, P = 0.035) The results showed that individuals with IHHNV had relatively low growth at high salinity.In the second experiment group, the average body weight of shrimp was 10.3 g (25 × 10 -3) and 8.5 g (49 × 10 ~ (-3)). When shrimp was not infected with IHHNV, there was no significant difference in survival at various salinities.