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コガタアカイエカの栄養生殖分離雌の濾胞の発育状態


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Title: コガタアカイエカの栄養生殖分離雌の濾胞の発育状態
Other Titles: Follicular development in Culex tritaeniorhynchus females showing gonotrophic dissociation
Authors: 小田, 力 / 森, 章夫 / 藤田, 紘一郎 / 和田, 義人
Authors (alternative): Oda, Tsutomu / Mori, Akio / Fujita, Koichiro / Wada, Yoshito
Issue Date: 30-Jun-1981
Publisher: 長崎大学熱帯医学研究所 / Institute of Tropical Medicine, Nagasaki University
Citation: 熱帯医学 Tropical medicine 23(2). p105-110, 1981
Abstract: 前報で秋の短日条件下で採集されたコガタアカイエカの吸血雌は低率において栄養生殖分離を起こすが,短日実験条件下で羽化した吸血活性の低い雌が吸血すると,そのほとんどが本現象を起こすことを報告した.これは両者の吸血活性の程度が異なり,後者のような吸血活性の低いものは秋に動物に吸血に来ないためと想像された.この点を確かめるために,秋に動物舎で採集された吸血雌で栄養生殖分離を起こしたもの及び短日の実験条件下で羽化して吸血した雌の中で本現象を示した雌について濾胞の発育状態を調査した.前者の濾胞はI期あるいはそれ以上に発育していたが,後者の濾胞は一般には吸血活性の低い未吸血雌のそれとほぼ同じで,50μ位の小型で,N期の未成熟であった.このような小型濾胞を持つ未吸血未経産雌は秋に動物に吸血に来る雌の中には含まれていない.したがって,我々が予想したように,実験環境の短日条件下で羽化した吸血活性の低い雌は秋自然界では動物に吸血に来ないことがわかる. / In Culex tritaeniorhynchus, examinations were made on follicular development in fed females showing gonotrophic dissociation, which were collected in animal houses in autumn, and fed females with this phenomenon, which were reared as adults in laboratory conditions of short photoperiod. The former females had well-developed follicles of stage I to III, but the latter females had usually small-sized follicles of stage of N and size of 50μ, which were about similar in size and stage to follicles in unfed females with low feeding activity. Such mosquitoes with small-sized follicles were not found in unfed nulliparous females collected in animals houses in autumn. From these facts, it is concluded that females with low feeding activity, which would feed on animals in experimental conditions of short day-length, would not be attracted to animals in the field in autumn.
URI: http://hdl.handle.net/10069/4303
ISSN: 03855643
Type: Departmental Bulletin Paper
Appears in Collections:Volume 23, No. 2

Citable URI : http://hdl.handle.net/10069/4303

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