Effect of food deprivation on response of the mite, Dermanyssus gailinae, to heat
Effect of food deprivation on response of the mite, Dermanyssus gailinae, to heat
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DOI：
10.1111/j.0269-283x.2004.00522.x
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发表时间：
2004-12-01
影响因子：
1.9
通讯作者：
Mullens, BA
中科院分区：
文献类型：
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作者：
Kilpinen, O;Mullens, BA
取食新鲜血液的鸡体革螨成虫在1、2-3、8-10、14-16和22-23天内均处于禁食状态。在受控的实验室条件下(24摄氏度，模拟黑暗条件2 lx)，这些螨类被分成10组进行测试，以确定它们对60 S周期内发出的热信号的敏感性。对不活动的粉尘进行了摄像，发现在60 S期间，粉尘开始活动的时间和百分比与温度的变化有关。在温度梯度为0.003-0.005℃/S的条件下，取食前一天摄食的粉尘，其活化率(20%)显著低于其他组。摄食后2-3天(60%)和8-10天(75%)激活程度最高。摄食后14-16天，激活率显著下降至45%，22-23天，激活率降至30%。激活模式可能反映了尘螨的生理条件和对热暗示的反应能力下降，并伴随着饥饿和与长时间不存在宿主的激活相关的更高风险。
Freshly blood-fed adult females of the chicken mite Dermanyssus gallinae DeGeer (Acari: Dermanysidae) were food-deprived during 1, 2-3, 8-10, 14-16 and 22-23 days. These mites were tested in groups of 10 to determine their sensitivity to a heat cue delivered for a 60 s period under controlled laboratory conditions (24degreesC, simulated dark conditions of 2 lx). Immobile mites were videotaped and start of activation (for individual mites) and percentage of mites activated in the 60 s period were related to temperature changes. Mites were activated with temperature gradients as low as 0.003-0.005degreesC/s. Mites that had fed the previous day had a significantly lower activation (20%) than other groups. Activation was highest at 2-3days (60%) and 8-10 days (75%) post-feeding. Activation declined significantly to 45% at 14-16 days and to 30% at 22-23 days post-feeding. Activation patterns probably reflect mite physiological condition and declining responsiveness to heat cues concomitant with starvation and higher risks associated with activation in the prolonged absence of a host.