Metamorphosis and gonad maturation in the horn fly Haematobia irritans
Metamorphosis and gonad maturation in the horn fly Haematobia irritans
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DOI：
10.1673/031.011.17401
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发表时间：
2011-12-31
影响因子：
2.2
通讯作者：
Quesada-Allue, Luis A.
中科院分区：
文献类型：
--
作者：
Basso, Alicia L.;Forneris, Natalia S.;Quesada-Allue, Luis A.
刺激性血吸虫Haematobia刺激性血吸虫Haematobia ishians(L.)(双翅目：蝇科)，是世界上许多地区危害最严重的牧牛害虫之一。雄性和雌性成虫都在寄主身上度过成年期，而未成熟期则在粪便中发育。我们的目标是确定刺激性隐翅虫性腺成熟的进展是否可以与发生在蛹内成虫发育过程中的眼睛和角质层色素沉着相关。分析了3龄幼虫(卵孵化后48h)至成虫蜕皮的生殖系细胞分裂进程。在发育中的雄性幼虫性腺中，减数分裂在卵孵化后72小时开始，而雌性卵原细胞在72小时开始减数分裂。雌虫减数分裂是在羽化120小时后，也就是节节中期才能检测到的。因此，雌性的性腺成熟似乎比雄性晚144小时。在蛹内阶段，生殖系细胞分裂事件的发生时间与作为外部标记的眼睛和角质层的色素沉着进程相关。
The bloodsucking horn fly, Haematobia irritans (L.) (Diptera: Muscidae), is one of the most damaging pests of pasture cattle in many areas of the world. Both male and female imagoes spend their adult stage on the host, while immature stages develop in dung. Our goal was to determine if the progress of H. irritans gonad maturation can be correlated with eye and cuticle pigmentation events that occur during development of the imago within the puparium. The progression of germline cell divisions in immature gonads was analyzed from the beginning of the third larval instar (48 hours after egg hatch) until imago ecdysis. In the developing male larval gonad, meiosis began 72 hours after egg hatch, whereas in females oogonia were premeiotic at 72 hours. Meiosis was not detected in females until the mid-pharate adult stage, 120 hours after puparium formation. Therefore, gonad maturation in females appears to be delayed 144 hours with respect to that in males. In the stages within the puparium, the timing of germline cell division events was correlated with the progress of pigmentation of the eyes and cuticle as external markers.