The biology and seasonal phenology of Aacanthocnema dobsoni (Froggatt) were studied at a single site in Victoria over a 2 year period between 2013 and 2015. This species is monophagous on the dioecious host, Allocasuarina verticillata (Lam.) L. Johnson (Casuarinaceae). Laboratory studies found that females attained reproductive maturity 24 h post‐eclosion, lived for 28.6 ± 2.8 (mean ± SE) days and laid 182 ± 23 (mean ± SE) eggs each. Egg development was most rapid at 26 °C, ceased below 7 °C and above 33 °C; hatching required 188 degree‐days. Nymphs could not be reared to adulthood on excised host branchlets maintained under controlled conditions, so no developmental data were obtained for these life stages. Seasonal phenology data revealed pronounced developmental asynchrony, i.e. with overlapping generations and multiple life stages occurring simultaneously. Three generations per year were observed, and there was no evidence of either developmental (egg and nymph) or reproductive diapause. A 4 day heat wave in January 2014 drastically reduced psyllid abundance at the study site and the size of the adults that eclosed from the surviving nymphs. These smaller adults produced substrate‐borne vibrational signals with altered characteristics, i.e. with significantly higher intensities and power. The altered signals might have facilitated communication over longer distances and increased mate finding opportunities when populations were low. The abundance of adults had recovered to preheat wave levels 3 months after the heat wave. High fecundity, multivoltinism and effective mate attraction signalling are life history traits that may mitigate against localised extinction of populations as a consequence of extreme weather events.

中文翻译：

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Aacanthocnema dobsoni（Hemiptera：Triozidae）的发育生物学和季节性物候以及气候介导的体型变化对振动信号的影响

在2013年至2015年的两年内，对维多利亚州的一个物种进行了Aacanthocnema dobsoni（Froggatt）的生物学和季节性物候研究。该物种在雌雄异株寄主Allocasuarina verticillata上单食（湖）约翰逊（木麻科）。实验室研究发现，雌性在出没后24小时达到生殖成熟，存活28.6±2.8（平均±SE）天，每只产下182±23（平均±SE）卵。在26°C时卵发育最快，在7°C以下和33°C以上停止。孵化需要188度日。若虫不能在受控条件下被切除的宿主小枝上恢复成年，因此没有获得这些生命阶段的发育数据。季节性物候数据显示明显的发育异步，即世代重叠和多个生命阶段同时发生。每年观察到三代，没有证据表明发育滞育（卵和若虫）或生殖滞育。2014年1月的4天热浪极大地降低了研究地点的木虱的丰度，并降低了存活的若虫所成虫的成虫大小。这些较小的成年人产生的基质传播的振动信号具有改变的特性，即具有更高的强度和功率。改变的信号可能有助于长距离的交流，并在人口少的时候增加了寻找伴侣的机会。热浪后3个月，大量成年人恢复到预热浪水平。高繁殖力，多电压和有效的伴侣吸引信号是生活史特征，可以缓解由于极端天气事件导致的人口局部灭绝。这些较小的成年人产生的基质传播的振动信号具有改变的特性，即具有更高的强度和功率。改变的信号可能有助于长距离的交流，并在人口少的时候增加了寻找伴侣的机会。热浪后3个月，大量成年人恢复到预热浪水平。高繁殖力，多电压和有效的伴侣吸引信号是生活史特征，可以缓解由于极端天气事件导致的人口局部灭绝。这些较小的成年人产生的基质传播的振动信号具有改变的特性，即具有更高的强度和功率。改变的信号可能有助于长距离的交流，并在人口少的时候增加了寻找伴侣的机会。热浪后3个月，大量成年人恢复到预热浪水平。高繁殖力，多电压和有效的伴侣吸引信号是生活史特征，可以缓解由于极端天气事件导致的人口局部灭绝。热浪后3个月，大量成年人恢复到预热浪水平。高繁殖力，多电压和有效的伴侣吸引信号是生活史特征，可以缓解由于极端天气事件导致的人口局部灭绝。热浪后3个月，大量成年人恢复到预热浪水平。高繁殖力，多电压和有效的伴侣吸引信号是生活史特征，可以缓解由于极端天气事件导致的人口局部灭绝。