Repeated bouts of dehydration deplete nutrient reserves and reduce egg production in the mosquito Culex pipiens
Repeated bouts of dehydration deplete nutrient reserves and reduce egg production in the mosquito Culex pipiens
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DOI：
10.1242/jeb.044883
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发表时间：
2010-08-15
影响因子：
2.8
通讯作者：
Denlinger, David L.
中科院分区：
文献类型：
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作者：
Benoit, Joshua B.;Patrick, Kevin R.;Denlinger, David L.
在这项研究中，我们研究了多次脱水和复水化对非滞育和滞育雌性库蚊的生存、代谢储备消耗和产卵的影响。在补水过程中获得糖的蚊子比那些没有糖的蚊子存活的时间更长，它们的存活时间与没有脱水的同龄蚊子相似。在没有提供糖的蚊子中，每次脱水都会减少蚊子的干质量——这种效果可能是由于利用了碳水化合物和脂质储备。糖原和脂质储备的损失可能对依赖这些储备过冬的滞育蚊子来说代价尤其高昂。在多次脱水条件下，非滞育和滞育后的库蚊的产卵量均有所降低。虽然鸡蛋的质量没有受到影响，但产蛋的数量却减少了。非滞育和滞育雌蚊都可以通过取食糖来弥补因脱水而造成的营养损失，但在滞育雌蚊的越冬栖息地中，取食糖的机会可能很少，因此脱水的影响在越冬种群中可能特别明显。
In this study of the mosquito, Culex pipiens, we examined the impact of multiple bouts of dehydration and rehydration on survival, depletion of metabolic reserves and egg production in both non-diapausing and diapausing females. Mosquitoes provided with access to sugar during rehydration survived longer than those allowed to rehydrate without sugar, and their survival was similar to that of mosquitoes of the same age that were not dehydrated. Among mosquitoes not provided with sugar, each dehydration bout reduced the mosquito's dry mass - an effect likely to be due to the utilization of carbohydrates and lipid reserves. The toll on glycogen and lipid reserves is likely to be especially costly for diapausing mosquitoes that are dependent on these stored reserves for winter survival. Egg production in both non-diapausing and post-diapausing C. pipiens was also reduced in response to multiple bouts of dehydration. Although egg quality was not compromised, the number of eggs produced was reduced. Both non-diapausing and diapausing females can compensate for the nutrient loss due to dehydration by sugar feeding but the opportunity to feed on sugar is likely to be rarely available in the overwintering habitat of diapausing females, thus the impact of dehydration may be especially pronounced in overwintering populations of C. pipiens.