FATE OF THE BLOOD MEAL IN FORCE-FED, DIAPAUSING CULEX-PIPIENS (DIPTERA, CULICIDAE)
FATE OF THE BLOOD MEAL IN FORCE-FED, DIAPAUSING CULEX-PIPIENS (DIPTERA, CULICIDAE)
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DOI：
10.1093/jmedent/26.4.332
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发表时间：
1989-07-01
影响因子：
2.1
通讯作者：
BRIEGEL, H
中科院分区：
文献类型：
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作者：
MITCHELL, CJ;BRIEGEL, H
滞育淡色库蚊不表现出寻找宿主的行为，只有在长时间接触或接近宿主的情况下才能被诱导采血。这种“强制喂养”的雌性并不使用血液来进行脂肪生成，只有一些雌性动物使用血液来启动卵黄生成。滞育CX。被诱导进食的蚊子在夜间进食期间平均射出4.2-4.6µl的血液，而非滞育对照组的平均射血量为0.1µl。滞育雌性对血液的亲和力降低，即使在最佳条件下，被喂养的雌性排出的血量超过通常保留的体积，这表明这种雌性在生理上没有采集和保留血液的程序。滞育雌性滞育期间尿酸和血红素排泄量和血粉量与滞育终止和卵黄沉积呈正相关。不需要引用性腺营养解离的发生来解释为什么一些滞育的雌性在吃了一顿血后没有启动卵黄发生。相反，这是由少量血液滞留随后不完全消化造成的，这是由阈值血容量决定的剂量依赖现象的预期结果。我们的数据支持CX的越冬策略。在自然环境中，越冬雌性在滞育结束前不采血或产卵，仅限于性腺营养协调。
Diapausing Culex pipiens L. do not display host-seeking behavior and can be induced to take blood only by being placed in contact with or in proximity to a host for prolonged periods. Such "force-fed" females do not use the blood for lipogenesis, and only some of them use the blood to initiate vitellogenesis. Diapausing Cx. pipiens that are induced to feed eject an average of 4.2-4.6 .mu.l of blood during overnight feeding periods compared with an average of 0.1 .mu.l for nondiapausing controls. The reduced avidity of diapausing females for blood, even under optimum conditions, and the ejection by fed females of blood volumes in excess of volumes usually retained indicate that such females are not physiologically programmed for taking and retaining blood. Data for uric acid and hematin excretion and bloodmeal volumes retained by diapausing females are positively correlated with diapause termination and yolk deposition. The occurrence of gonotrophic dissociation need not be invoked to explain the failure of some diapausing females to initiate vitellogenesis following a blood meal. Instead, this is explained by retention of small quantities of blood followed by incomplete digestion and is the expected result of a dose-dependent phenomenon determined by threshold blood volumes. Our data support the concept that the overwintering strategy of Cx. pipiens is limited to gonotrophic concordance in which overwintering females in nature do not take blood or develop eggs until diapause is terminated.