Adaptive significance of egg size plasticity in response to temperature in the migrant skipper, Parnara guttata guttata (Lepidoptera: Hesperiidae)
Adaptive significance of egg size plasticity in response to temperature in the migrant skipper, Parnara guttata guttata (Lepidoptera: Hesperiidae)
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迁徙船长 Parnara guttata guttata（鳞翅目：Hesperiidae）蛋大小可塑性对温度的适应性意义
DOI：
10.1007/s10144-006-0253-4
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发表时间：
2006
影响因子：
1.7
通讯作者：
F. Nakasuji
中科院分区：
文献类型：
--
作者：
T. Seko;F. Nakasuji
在较低温度下饲养的迁徙弹涂鱼Parnara guttata guttata的雌性产卵较小。卵大小可塑性对温度的反应在该物种中的适应意义尚不清楚。我们建议，基于以下实验结果，P。Guttalaas利用温度作为间接线索来预测下一代的寄主条件(叶片韧性)。第一代、第二代和越冬(第三代)幼虫在典型的温光条件下饲养(25℃下LD16：8，25℃下LD14：10，20℃下LD14：10)。20℃下LD14：10饲养的雌虫产卵量比25℃下的LD14：10和LD16：8饲养的多，但产卵量较小。其次，测定了在三种光周期/温度处理下饲养的雌性一龄幼虫在幼叶(软叶)和硬叶、老叶(硬叶)上的存活率。在25℃下，在LD16：8和LD14：10下饲养的雌性幼虫在软叶和硬叶上的存活率没有差异，但在20℃下，在软叶上饲养的幼虫的存活率显著高于在硬叶上饲养的幼虫。Guttalame可能是一种阈值反应。在未成熟阶段经历的20℃以下的温度可能有助于在越冬世代OFP产生更小更多的卵。G.杜仲胶。
Females of the migrant skipper,Parnara guttata guttata, that are reared under lower temperatures lay smaller eggs. The adaptive significance of egg size plasticity in response to temperature is unknown in this species. We suggest, based on the following experimental results, thatP. g. guttatauses temperature as an indirect cue to predict the host condition (leaf toughness) of the next generation. First, larvae were reared under the typical conditions of temperature and photoperiod experienced during the immature stages in the first, second, and overwintering (third) generations (LD 16:8 at 25°C, LD 14:10 at 25°C and LD 14:10 at 20°C). Females reared under LD14:10 at 20°C produced more, smaller eggs than those reared under LD14:10 and LD16:8 at 25°C. Secondly, survival rates of first instar larvae derived from females reared under the three photoperiod/temperature treatments were measured on young soft rice leaves (“soft”), or tough, old rice leaves (“tough”). Survival rates of hatchlings reared on soft and tough leaves did not differ when females were reared under LD16:8 and LD14:10 at 25°C. However, hatchling survival was significantly higher on soft than on tough leaves when females were reared under LD14:10 at 20°C. Thirdly, we found that egg size plasticity in response to temperature inP. g. guttatamay be a threshold response. Temperatures below 20°C experienced during the immature stages may be effective for production of smaller and more eggs in the overwintering generation ofP. g. guttata.