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东乡伊蚊自殖株和非自殖株卵巢发育动态的比较研究 被引量:3
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作者 孙建新 谭璟宪 《第二军医大学学报》 CAS CSCD 北大核心 1989年第2期133-137,144,共6页
本文报道了东乡伊蚊自殖株和非自殖株蚊虫卵巢发育动态的研究结果。实验先在恒温室内从野生东乡伊蚊中选育出遗传表达稳定的自殖株和非自殖株,然后在不同的发育时间观察两株蚊虫的卵巢发育情况。结果显示东乡伊蚊自殖株和非自殖株卵巢... 本文报道了东乡伊蚊自殖株和非自殖株蚊虫卵巢发育动态的研究结果。实验先在恒温室内从野生东乡伊蚊中选育出遗传表达稳定的自殖株和非自殖株,然后在不同的发育时间观察两株蚊虫的卵巢发育情况。结果显示东乡伊蚊自殖株和非自殖株卵巢发育的生物学特征明显不同,成熟卵泡的大小、数量,卵泡发育过程的均衡性和连续性均有显著差异。 展开更多
关键词 东乡伊蚊 卵巢发育 自殖 非自殖
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Mosquito autogeny in Aedes caspius (Diptera: Culicidae): alterations of larval nourishments reservation upon bacterial infection
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作者 Ashraf M. Ahmed 《Insect Science》 SCIE CAS CSCD 2013年第4期472-484,共13页
The present study recorded mosquito autogeny for the first time amongst Aedes caspius species in the Eastern region of Saudi Arabia. Laboratory rearing showed an obligatory autogenous species of Ae. caspius since it f... The present study recorded mosquito autogeny for the first time amongst Aedes caspius species in the Eastern region of Saudi Arabia. Laboratory rearing showed an obligatory autogenous species of Ae. caspius since it foregoes blood feeding during its first ovarian cycle, even in the presence of the hosts (CD mouse), but produces its second egg batch only if ingested a blood meal. Both morphological and molecular identification confirmed that both autogenous and anautogenous strains belong to the same species of Ae. caspius. Data from biochemical analysis showed significant 2, 1.6, and 1.4 folds higher total carbohydrates, proteins, and lipids reserves respectively in the fourth larval instar of the autogenous strain compared to that of the anautogenous ones. In addition, exposing the fourth larval instars of autogenous strain to the infection stress by the mosquito larvicidal bacterium, Bacillus thuringiensis var kurstaki has significantly reduced total carbohydrates, proteins and lipids reserves by 29%, 35%, and 46%, respectively, at 12 h postinfection compared to those of uninfected ones. These reductions in nourishment reserves were more pronounced at 24 h postinfection in the case of proteins and lipids, but not carbohydrates. These results may indicate that bacterial infection is a health stress that significantly reduced nourishments reservation, which may interrupt the success of adult autogeny. However, the impact of infection-induced decline in larval nourishments reservation on successful adult autogeny is still to be investigated. 展开更多
关键词 Aedes caspius anautogeny AUTOGENY Bacillus thuringiensis nourishmentsreservation
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Promiscous female Euxesta eluta derive nutrients for ovarian development by expelling and consuming ejaculates 被引量:1
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作者 Solana Abraham Gisela Castillo +3 位作者 Viviana Diaz Guido Van Nieuwenhove Gabriela Murua Juan Rull 《Insect Science》 SCIE CAS CSCD 2020年第3期545-557,共13页
Seminal gifts range from important material donations to items that provide little direct benefit to females.Promiscuous,female silk corn flies Euxesta eluta expel and consume male ejaculates immediately after mating.... Seminal gifts range from important material donations to items that provide little direct benefit to females.Promiscuous,female silk corn flies Euxesta eluta expel and consume male ejaculates immediately after mating.The evolution and function of this peculiar behavior are currently unknown.We performed a series of experiments aimed to:determine if females under different dietary regimes derive nutrients or water for survival and/or reproduction from ejaculate consumption,if males suffer a fitness cost from supplying females with ejaculates,and if females prefer to mate and/or are more likely to store sperm from well fed than nutritionally stressed presumably inferior males.Experiments revealed that protein deprived E.eluta females derive nutrients for ovarian development through consumption of ejaculates of protein fed males.No seminal products affecting survival appear to be transferred in the consumed ejaculate.However,ovarian development,in contrast to testes growth,occurs in detriment of longevity.Females preferred to mate with protein fed males,yet sperm retention in spermathecae was extremely rare after a single mating.This finding suggests that females could be exerting post copulatory control.A key question that remained to be addressed for the understanding of this puzzling and promiscuous mating system is what ecological factors or male traits drive females to retain sperm from one or several males in order to achieve and/or maximize fertilization potential. 展开更多
关键词 anautogeny POLYANDRY postcopulatory female control seminal gifts sperm storage
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东乡伊蚊自殖株和非自殖株卵黄发生动态的比较研究
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作者 孙建新 谭璟宪 《第二军医大学学报》 CAS CSCD 北大核心 1990年第1期39-42,共4页
以实验室分离所得的东乡伊蚊自殖株和非自殖株为材料,用组织化学法、免疫组织化学法对两株蚊虫卵黄发生的动态进行了比较研究。结果发现,卵黄发生规律在同种不同生理株蚊虫各有特征,自殖株卵黄原蛋白合成在成蚊羽化后不久即启动,发生过... 以实验室分离所得的东乡伊蚊自殖株和非自殖株为材料,用组织化学法、免疫组织化学法对两株蚊虫卵黄发生的动态进行了比较研究。结果发现,卵黄发生规律在同种不同生理株蚊虫各有特征,自殖株卵黄原蛋白合成在成蚊羽化后不久即启动,发生过程循序渐进,直至卵母细胞吸收沉积卵黄蛋自发育成熟;非自殖株卵黄原蛋白的合成则必须在吸血之后才开始,卵黄发生过程在吸血前有明显的休止期。结果还显示,两株蚊虫卵黄原蛋白的合成能力也有差异。 展开更多
关键词 东乡伊蚊 卵黄发生 自殖 非自殖
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