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首页> 外文期刊>Journal of Insect Physiology >Induction of egg hatching by high humidity in the cicada Cryptotympana facialis
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Induction of egg hatching by high humidity in the cicada Cryptotympana facialis

机译：蝉蝉高湿诱导卵孵化

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摘要

The timing of egg hatching in Cryptotympana facialis was examined in relation to short-term weather conditions. The brief underwater submergence, once a week, of dead twigs bearing cicada egg nests resulted in high hatching rates both at 25 degrees C and under outdoor conditions protected from rainfall. Under outdoor conditions with natural rainfall, most eggs hatched on rainy days. There was a significant positive correlation between the number of hatching eggs and daily relative humidity (RH). When eggs picked from twigs were exposed to various humidity levels, many eggs hatched quickly at higher humidity without direct contact with liquid water. Newly hatched nymphs showed a low tolerance to desiccation; at 81% RH at 25 degrees C, most of them died within 6h. Under outdoor conditions, most nymphs died within 2h on sunny days, whereas nymphs survived longer on rainy days. When newly hatched nymphs were released on dry ground, only 24% of them succeeded in burrowing into the soil, and many were killed by ants or desiccation. However, 92% of nymphs released onto wet ground successfully burrowed into it. The direct induction of hatching by high humidity ensures the survival and establishment in the soil of newly hatched nymphs in this species.
机译：检查了面部隐孢子虫卵孵化的时间与短期天气状况的关系。每周一次在水下一次短暂浸没带有蝉卵巢的枯树枝导致在25摄氏度和室外条件下避免雨水的高孵化率。在自然降雨的室外条件下，大多数鸡蛋在雨天孵化。孵化卵的数量与每日相对湿度（RH）之间存在显着的正相关。当从树枝上摘下的鸡蛋暴露在各种湿度下时，许多鸡蛋会在较高的湿度下迅速孵化，而无需直接与液态水接触。新孵化的若虫对干燥的耐受性低;在25°C下相对湿度为81％时，大多数在6小时内死亡。在室外条件下，大多数若虫在晴天2h内死亡，而若虫在雨天存活更长的时间。当新孵化的若虫在干燥的地面上释放时，只有24％的若虫成功钻入土壤，许多蚂蚁或被干燥杀死。但是，释放到潮湿地面上的若虫有92％成功钻入其中。高湿度直接孵化可确保该物种新孵化的若虫在土壤中的存活和建立。

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