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disease of aquatic organisms
释义
disease of aquatic organisms
Encyclopedia
农学
水产养殖病害
释
disease of aquatic organisms
水产养殖病害
通常由细菌、寄生虫、病毒等病原体或环境因素等引起的水产养殖动物的疾病。表现为水产养殖动植物的正常生理活动遭受破坏,对外界环境的适应能力降低并伴随生产能力和经济价值的下降。狭义的水产养殖病害指鱼病。广义上包括棘皮动物、甲壳类动物、鱼贝类等众多水产养殖动植物种类的病害。此处为广义的水产养殖病害。
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upper main sequence
upper mantle
upper mantle project
upper marginal dimension
upper measure
upper memory area
upper memory area, UMA
upper mixed layer entrainment
upper-most crust
uppermost level
Upper Nile
Upper Nile Basin
upper nil-radical
upper one-sided limit
upper ontology
upper outer density
upper Privalov operator
upper process capability index
upper pure value
upper quadrant
upper quartile
upper quartile length
upper radical
upper radical class
upper relaxation
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