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Effect of Photoperiod on Follicular Development of Females of Culex Mosquitoes


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Title: Effect of Photoperiod on Follicular Development of Females of Culex Mosquitoes
Other Titles: イエカ類の濾胞の発育に及ぼす日長の影響
Authors: Oda, Tsutomu / Mori, Akio / Eshita, Yuki / Uchida, Keikichi / Kurokawa, Kenji / Suenaga, Osamu / Mine, Mariko
Authors (alternative): 小田, 力 / 森, 章夫 / 江下, 優樹 / 内田, 桂吉 / 黒川, 憲次 / 末永, 斂 / 三根, 真理子
Issue Date: 31-Mar-1992
Citation: 長崎大学医療技術短期大学部紀要 = Bulletin of the School of Allied Medical Sciences, Nagasaki University. 1992, 5, p.135-142
Abstract: アカイエカやコガタアカイエカでは吸血欲を欠き,未成熟濾胞を持った,いわゆる休眠雌が越冬する.休眠状態は短日条件により誘起される.他のイエカ類でも休眠雌が越冬に入ると推測される.そこで,長崎産のカラツイエカ,ミナミハマダラウスカ,トラフカクイカ,スジアシイエカと沖縄産ネッタイイエカの4令幼虫を21℃の長日または短日条件下で飼育羽化させて雌の第1濾胞の発育状態を調べた.長日条件下では,いずれの種類もよく発達した濾胞を持ったが,短日条件下では前4種のほとんどの雌は未成熟濾胞を保有した.野外ではミナミハマダラウスカとコガタクロウスカの休眠雌が採集された.したがって,これらのイエカも休眠状態に入って越冬するものと思われる.また,ネッタイイエカでも短日条件下で未成熟濾胞保有雌が,少数ではあるが,出現した.しかし,ネッタイイエカは短日条件下でもよく吸血するので,未成熟濾胞の雌は休眠状態にあるとしても,極めて浅いものと思われる. / The mosquito of Culex pipiens pallens mosquito overwinters in diapausing females which have undeveloped follicles and do not feed on animals blood. To determine the state of such diapause, follicular development was examined using the 1st follicles of unfed females in the Culex mosquitoes, Culex bitaeniorhynchus, Cx. halifaxii, Cx. mimetics. Cx. p. quinquefasciatus, and Cx. vagans reared from 4th instar larvae to adulthood under long or short photoperiods. Under a long photoperiod,the females had well-developed follicles, and under a short photoperiod they had undeveloped follicles in 4 mosquito species besides Cx, p. quinquefasciatus. In the field, diapausing females of Cx, hayashii and Cx. mimetics were collected. This suggests that these mosquitoes overwinter in the diapausing females with undeveloped follicles and that do not feed on blood. In Cx. p. quinquefasciatus, a few females with undeveloped follicles appeared under the short photoperiod, but this diapause will be extremely light.
Keywords: Diapause / undeveloped follicles / overwinter / Culex mosquitoes
URI: http://hdl.handle.net/10069/18165
ISSN: 09160841
Type: Departmental Bulletin Paper
Text Version: publisher
Appears in Collections:Volume 5

Citable URI : http://hdl.handle.net/10069/18165

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