Induction of egg hatching by high humidity in the cicada Cryptotympana facialis.
Induction of egg hatching by high humidity in the cicada Cryptotympana facialis.
复制标题
DOI：
10.1016/j.jinsphys.2006.09.005
复制
发表时间：
2006-11
影响因子：
2.2
通讯作者：
M. Moriyama;H. Numata
中科院分区：
文献类型：
--
作者：
M. Moriyama;H. Numata
研究人员检查了隐鼓卵孵化时间与短期天气条件的关系。每周一次，将带有蝉蛋巢的枯枝短暂浸入水下，在 25°C 和不受降雨影响的室外条件下，孵化率都很高。在自然降雨的室外条件下，大多数卵在雨天孵化。孵化蛋数量与日相对湿度（RH）呈显着正相关。当从树枝上采摘的卵暴露于不同的湿度水平时，许多卵在较高湿度下快速孵化，而无需直接接触液态水。刚孵化的若虫对干燥的耐受性较低；在25℃、81%RH的条件下，大多数在6小时内死亡。在室外条件下，晴天大多数若虫在2小时内死亡，而雨天若虫存活时间较长。当刚孵化的若虫被释放到干燥的地面上时，只有24%的若虫成功钻入土壤，许多人被蚂蚁或干燥杀死。然而，释放到潮湿地面上的若虫中有 92% 成功地钻入其中。高湿度直接诱导孵化可确保该物种新孵化的若虫在土壤中生存和定居。
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°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°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.