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首页> 外文期刊>Aquaculture Research >Lethal doses of ammonia on the late stage larvae of Chinese mitten handedcrab, Eriocheir sinensis (H.Milne Edwards), (Decapoda : Grapsidae) rearedin the laboratory
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Lethal doses of ammonia on the late stage larvae of Chinese mitten handedcrab, Eriocheir sinensis (H.Milne Edwards), (Decapoda : Grapsidae) rearedin the laboratory

机译：在实验室饲养的中华绒螯蟹（Eriocheir sinensis）（H.Milne Edwards）（Decapoda：Grapsidae）后期幼虫的致死剂量氨

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摘要

Four successive life stages (zoea-III, zoea-IV, zoea-V and megalopa) of the Chinese mitten-handed crab, Eriocheir sinensis (H. Milne-Edwards), were exposed to ammonia in a series of short-term bioassays with the static-renewal method at 22 degrees C, pH 8.0 and 25 parts per thousand salinity. The greatest sensitivity was observed in the zoea-III stage. The 24-h LC50 values for zoea-III, zoea-IV, zoea-V and megalopa were 32.8, 73.1, 84.0 and 90.1 mg L-1 for NH3 + NH4+, and 1.11, 2.36, 2.77 and 3.18 mg L-1 for NH3, respectively. The 72-h LC50 values for zoea-III, zoea-IV and zoea-V were 11.9, 23.6 and 38.2 mg L-1 for NH3 + NH4+, and 0.40, 0.76 and 1.26 mg L-1 for NH3, respectively, The 96-h LC50 values for megalopa were 37.3 mg L-1 for NH3 + NH4+ and 1.31 mg L-1 for NH3. It was found that ammonia tolerance increased with larval development from zoea-III to megalopa, especially from zoea-III to zoea-IV and from zoea-IV to zoea-V. A comparison of safe levels of ammonia among the different life stages indicated that all stages were significantly different with respect to safe levels of ammonia (P < 0.05) except zoea-V and megalopa, which had the highest safe levels. In general, both the larvae and juveniles of E. sinensis are less resistant to ammonia than those of other crustacean species studied so far.
机译：中华绒螯蟹中华绒螯蟹（H. Milne-Edwards）的四个连续生命阶段（zoea-III，zoea-IV，zoea-V和megaloopa）在一系列短期生物测定中被氨暴露于氨中。在22摄氏度，pH 8.0和25千分之一盐度下的静态更新方法。在zoea-III阶段观察到最大的灵敏度。 zoea-III，zoea-IV，zoea-V和美加洛巴的24小时LC50值分别为NH3 + NH4 +为32.8、73.1、84.0和90.1 mg L-1，而对于NH3 + NH4 +为1.11、2.36、2.77和3.18 mg L-1 NH3分别。 zoea-III，zoea-IV和zoea-V的72-h LC50值分别为NH3 + NH4 +为11.9、23.6和38.2 mg L-1，以及NH3为0.40、0.76和1.26 mg L-1，The 96美加洛巴的-h LC50值对于NH3 + NH4 +为37.3 mg L-1，对于NH3为1.31 mg L-1。已发现，氨的耐受性随着幼虫从zoea-III到美加洛巴的发展而增加，特别是从zoea-III到zoea-IV以及从zoea-IV到zoea-V。在不同生命阶段中氨的安全水平的比较表明，除了最高安全水平的zoea-V和美加洛巴以外，所有阶段的氨安全水平均存在显着差异（P <0.05）。通常，中华绒螯蟹的幼虫和幼虫对氨的抵抗力都比迄今为止研究的其他甲壳类动物的要弱。

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