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首页> 外文期刊>Review in aquaculture >Pond shutdown as a strategy for preventing outbreaks of white spot disease in shrimp farms in Mexico
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Pond shutdown as a strategy for preventing outbreaks of white spot disease in shrimp farms in Mexico

机译:池塘关闭是防止墨西哥虾养殖场爆发白斑病的策略

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Pond shutdown is a strategy used to eliminate residual pathogens. For 2005-2011, we analysed the relationship between the prevalence of white spot disease (WSD) and the length of pond shutdown (LPS) and discussed its effectiveness for the prevention of WSD in Mexico. The LPS increased significantly from 2.1 months in 2005 to 3.1 months in 2011. The prevalence of WSD diminished significantly from 2005 to 2009, but no evidence of diminution was found when 2010 and 2011 were included in the time series. A chi(2)-test for trend indicated that the prevalence of WSD diminished significantly as LPS increased in 2005 through to 2009 and 2005 through to 2011 (P 0.05). When analysed on an annual basis, the prevalence decreased significantly in relation with LPS in 2006 (P = 0.048), 2007 (P = 0.002), 2008 (P = 0.0001) and 2009 (P = 0.001); no evidence for decreasing the prevalence occurred in 2005 (P = 0.1), 2010 (P = 0.17) or 2011 (P = 0.52). The chi(2)-test adjusted for confounding indicated that decreases in prevalence in 2005 to 2009 could be attributed to increases of LPS rather than confounding variables such as increased resistance of shrimp, diminished virulence and improved cultivation practices. We discuss the possible relationship between the warm water temperatures in the Gulf of California and increases in the prevalence of WSD. We conclude that LPS has been an adequate management strategy for preventing WSD, supporting recent compulsory measures taken by the Mexican government to improve biosecurity in shrimp farms.
机译:池塘关闭是一种用于消除残留病原体的策略。在2005-2011年,我们分析了白斑病(WSD)的患病率与池塘停水时间(LPS)之间的关系,并讨论了其在墨西哥预防WSD的有效性。 LPS从2005年的2.1个月显着增加到2011年的3.1个月。从2005年到2009年,WSD的流行率显着降低,但是在时间序列中包含2010和2011时,没有发现减少的迹象。趋势的chi(2)检验表明,随着LPS在2005年至2009年和2005年至2011年的升高,WSD的患病率显着降低(P <0.05)。按年度分析,与LPS的患病率相比,2006年(P = 0.048),2007年(P = 0.002),2008年(P = 0.0001)和2009年(P = 0.001)显着下降;在2005年(P = 0.1),2010年(P = 0.17)或2011年(P = 0.52)均没有降低流行率的证据。调整混杂因素的chi(2)检验表明,2005年至2009年患病率的下降可能归因于LPS的增加,而不是混杂因素,例如虾的抗药性增加,毒力降低和改良的养殖方式。我们讨论了加利福尼亚湾的热水温度与WSD患病率上升之间的可能关系。我们得出结论,LPS是预防WSD的适当管理策略,支持墨西哥政府最近采取的强制措施,以改善虾养殖场的生物安全。

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