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用12种天然或经酶修饰的动物及人红细胞测定罗氏沼虾的血清和肌肉提取液的凝集能力,同时进行糖抑制、热稳定性、pH及Ca^2+影响试验.结果显示,罗氏沼虾血清对鹤鹑红细胞的凝集效价比肌肉提取的高,且糖抑制、热稳定性、pH适应范围及对Ca^2+的依赖性都存在明显差别.表明罗氏沼虾血清和肌肉提取液所含凝集素的类型不同. 相似文献
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罗氏沼虾眼柄神经分泌细胞的超微结构 总被引:6,自引:0,他引:6
姚泊 《中山大学学报论丛》1995,(3)
对产卵前罗氏沼虾眼柄的神经分泌细胞胞质,能观察到高尔基体和线粒体等细胞器结构,在高尔基体的生成面和成熟面均有许多高尔基小泡,核膜仅在部份区域有核周腔增宽现象,对产卵后罗氏沼虾眼柄的神经分泌细胞胞质,能观察到线粒体和许多大小不一的泡状结构,但没有观察到高尔基体,核膜都有明显的和不同程度的核周腔增宽现象. 相似文献
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在水温19.0—24.0℃时,测定水体DO值,在流水情况下,对日本沼虾和秀丽白虾不同时刻对水体DO值的影响情况进行比较,试验对象为充分曝气的自来水。结果表明,日本沼虾和秀丽白虾对水体DO值的影响具有昼夜节律性,随虾的耗氧变化其影响高峰出现在中午12:00,低谷在凌晨2:00,且日本沼虾对DO值的影响大于秀丽白虾。 相似文献
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罗氏沼虾亲虾越冬是育苗的关键,采用大水体高水位、设置隐蔽体、引入水葫芦、伴养鳙鱼、多种饵料组合、交叉投喂、偏低温越冬等技术举措,能提高亲虾越冬成活率、育苗孵化率.本实验亲虾越冬成活率为98%.每尾抱卵亲虾孵出1.93万尾状幼体. 相似文献
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The structural change of the oviduct of freshwater shrimp (Macrobrachium nipponense) during spawning was examined by electron microscopy. The oviduct wall structural characteristics seem to be influenced significantly by the spawning process. Before the parturition and ovulation, two types of epithelial cells (types Ⅰ and Ⅱ) are found in the epithelium. The free surfaces of type Ⅰ and type Ⅱ cells have very dense long microvilli. Under the type Ⅰ and type Ⅱ cells, are a relatively thick layer of secreting material and a layer of mostly dead cells. After ovulation, two other types of epithelial cells (types Ⅲ and Ⅳ) are found in the oviduct wall epithelium. The free surface of type Ⅲ cells only has short microvilli scattered on the surface. The thick layer with secreting material and the dead cell layer disappeared at this stage. In some type Ⅲ cells, the leaking out of cytoplasm from broken cell membrane led to the death of these type Ⅲ cells. The transformation of all four types of epithelial cells was in the order: Ⅳ→Ⅰ→Ⅱ→Ⅲ. 相似文献
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