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首页> 外文期刊>Zoological Science >Life history of Milnesium tardigradum Doyere (Tardigrada) under a rearing environment
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Life history of Milnesium tardigradum Doyere (Tardigrada) under a rearing environment

机译：饲养环境下的南方米尔斯（Tardigrada）的生活史

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A strain of carnivorous tardigrade, Milnesium tardigradum, was reared in water on agar plates at 25degreesC. The monogonont rotifer Lecane inermis was presented as a food source. This rearing system permitted detailed observation of tardigrade behaviour. Daily measurements of body length allowed the growth rate and moulting cycle of this species to be determined. The life history of M. tardigradum raised under these conditions included up to seven periods of moult. The first and second moults occurred at intervals of 4-5 days, and individuals reached reproductive maturity at the 3rd-instar stage; the first period of egg laying accompanied the third moult. The most rapidly developing animal in the study population laid eggs 12 days after hatching. The egg-laying intervals or moulting intervals of adult animals were around 6-10 days. The mean clutch size was 6.9 eggs. All tardigrades in this laboratory population were female and reproduced by parthenogenesis. The duration of the embryonic stage ranged from 5-16 days. The most long-lived female survived for 58 days after hatching, and laid a total of 41 eggs in 5 separate clutches. The entire life cycle of tardigrades reared under these conditions was recorded and photographed. A brief description of the embryonic development of M. tardigradum was also reported.
机译：将食肉的油菜菌Miltarium tardigradum菌株在水中于25℃在琼脂平板上饲养。单性轮虫Lecane inermis被认为是食物来源。该饲养系统允许详细观察缓凝剂的行为。每天测量体长可以确定该物种的生长速度和换羽周期。在这些条件下饲养的tardigradum的生活史包括多达七个换羽期。第一次和第二次换羽间隔为4-5天，个体在三龄期达到生殖成熟。产卵的第一期伴随着第三次换羽。研究种群中发育最快的动物在孵化后12天产卵。成年动物的产卵间隔或换羽间隔约为6-10天。离合器的平均大小为6.9卵。该实验室种群中所有的缓步动物均为雌性，并通过孤雌生殖繁殖。胚胎期的持续时间为5-16天。寿命最长的雌性在孵化后存活58天，并在5个独立的离合器中共产下41个卵。记录并拍照在这些条件下饲养的节肢动物的整个生命周期。还报道了tardigradum的胚胎发育的简要描述。

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