Medical Entomology and Zoology
Online ISSN : 2185-5609
Print ISSN : 0424-7086
ISSN-L : 0424-7086
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Volume 73, Issue 4
Displaying 1-4 of 4 articles from this issue
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Short Communications
  • First recorded of Ixodes kerguelenensis (Acari: Ixodidae) collected from a short-tailed shearwater Puffinus tenuirostris in Japan
    Kaito Kotani, Kandai Doi, Nana Ushine, Takuya Kato, Tatsuo Sato, Masak ...
    2022 Volume 73 Issue 4 Pages 157-159
    Published: December 25, 2022
    Released on J-STAGE: December 25, 2022
    DOIhttps://doi.org/10.7601/mez.73.157
    JOURNAL FREE ACCESS
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    An engorged ixodid tick was collected from a rescued short-tailed shearwater, Puffinus tenuirostris (Temminck), at Funabashi Sanbanse Seaside Park in Chiba Prefecture, Japan. Based on morphological features, we identified the specimen as Ixodes kerguelenensis (André and Colas-Belcour), which is a species known to infest seabirds in Oceania. To our knowledge, this is the first case report of I. kerguelenensis in Japan. The case of infestation to the shearwater suggests the possibility of the long-distance translocation of the tick in Oceanian region to Japan.

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  • Observation of parous rate, shedding of scales in the single white stripe on the scutum in Aedes albopictus females at a thicket in Kobe City
    Hiroshi Yamanishi
    2022 Volume 73 Issue 4 Pages 161-166
    Published: December 25, 2022
    Released on J-STAGE: December 25, 2022
    DOIhttps://doi.org/10.7601/mez.73.161
    JOURNAL FREE ACCESS
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    Determination of the parity in mosquito involves dissecting the females under a stereomicroscope to look for parous ovaries. While dissecting Aedes albopictus females for the determination of their parity, I observed an individual wherein the scales of the single white stripe on the scutum appeared peeled off. As parous mosquitoes are more active for a longer period of the time than nulliparous mosquitoes, this increased activity in parous females could likely induce the shedding of the scales of the single white stripe. The association between parity and the shedding of the single white stripe on the scutum was examined. Ae. albopictus individuals were collected one at a time using an insect net and carefully transferred to a small plastic container. I then calculated the ratio between the length of the single white stripe and the scutum length based on the photomicrograph of the scutum. Individuals with a ratio of 0.5 or more were considered normal-type and individuals with a ratio below 0.4 as peeling-type. There was a significant difference (p<0.05) in the number of peeling-type individuals between nulliparous and parous, but the shedding of scales of the single white stripe on the scutum can’t be used as an indicator of parity in females.

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Japanese summaries of papers written in English in this issue
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