Japanese Journal of Entomology (New Series)
Online ISSN : 2432-0269
Print ISSN : 1343-8794
Volume 16, Issue 2
Displaying 1-21 of 21 articles from this issue
  • Hiroshi KAGO, Masashi YOKOGAWA, Takahiro FUJISAWA, Naohiko NOMA
    Article type: Article
    2013 Volume 16 Issue 2 Pages 87-96
    Published: April 05, 2013
    Released on J-STAGE: September 21, 2018
    JOURNAL FREE ACCESS
    To elucidate the possible impact of bamboo culm thinning on ground beetle species diversity, we carried out a survey of species diversity and community structure of ground beetles (Coleoptera: Carabidae) using unbaited pitfall trapping in riparian forest dominated by broad-leaved trees and bamboos along the Inukami River in Shiga Prefecture, Japan. Ground beetles were captured once a week at four experimental squares each with different bamboo culm density treatments; all culm cutting (AC: 0 culm/m2), heavily thinned (HT: 0.5 culm/m2), lightly thinned (LT: 0.7 culm/m2) and abandonment (AB: 1.8 culm/m2), during July to December, 2010. A total of 2,739 individuals of ground beetles belonging to 33 species were captured at the four squares. Species richness of ground beetles was the highest in the AC square and the lowest in the AB square. Individuals of many species increased and individuals of very few species decreased by bamboo cutting. In addition, detrended correspondence analysis revealed that the species composition at the AC square differed from the other squares. The characteristic species in the AC square were Harpalini spp., Chlaenius variicornis and C. naeviger. The former two are known as open habitat species, contributing to the higher species richness and the characteristic species composition. These results showed that although there was no replication in present study, removal of bamboo culms in broad-leaved forest had a positive impact on the species richness and community structure of ground beetles primary due to the increase of the open habitat species.
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  • Manabu KISHI, Kenji FUJISAKI
    Article type: Article
    2013 Volume 16 Issue 2 Pages 97-103
    Published: April 05, 2013
    Released on J-STAGE: September 21, 2018
    JOURNAL FREE ACCESS
    We compared seasonal prevalences, proportion of long-winged morphs, and reproductive traits of females, in two water strider species, the alien species Rhagadotarsus kraepelini and the native species Aquarius paludum paludum, in Wakayama Prefecture, Japan. We sampled both species at four permanent and two vernal ponds from March to December 2009. In their natural habitats, R. kraepelini can show more than four generations per year, and A. paludum can do two ones, respectively. Eggs of R. kraepelini, which were deposited in floating plant litter, could survive dry and cold habitats for 4 months or more in winter. Whereas the proportion of long-winged A. paludum morphs decreased during the summer, that of long-winged R. kraepelini morphs was very low except during late summer. The number of reproductively viable A. paludum females decreased in September. Conversely, many females of R. kraepelini developed reproductive systems into November and only disappeared in early December. These results suggest that both traits of r strategist in R. kraepelini can be succeeded in Japan.
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  • Yoshiyuki NAGAHATA, Yozo KOSHIYAMA, Kazuo UMETSU, Michiyo GOTO
    Article type: Article
    2013 Volume 16 Issue 2 Pages 104-112
    Published: April 05, 2013
    Released on J-STAGE: September 21, 2018
    JOURNAL FREE ACCESS
    Skins of pupa in two empty cocoons and a dead larva of Cetoniinae were found in a nest of crow that was collected from a telegraph pole. DNA samples were extracted from pupal cast-off skins left in the empty cocoons and a larval dead body for species identification of the insects, and from nest materials for the bird identification. COI region of mtDNA was examined for insect identification. DNA sequence of 779bp of PCR products, which was generated by using a universal primer set for Coleoptera, was determined by direct sequence method. Cytochrome b region of mtDNA was examined for bird identification. PCR products, which were generated by using species-specific primers for each Corvus macrorhynchos Wagler, C. corone Linnaeus and C. frugilegus Linnaeus with a common primer for all the three species, were applied to polyacrylamide gel electrophoresis for visualization of the product size. The results indicated all the cocoons and a dead larva were Anthracophora rusticola Burmeister, and the owner of a nest was C. corone. Two haplotypes of mtDNA were discriminated among three individuals of A. rusticola, indicating at least two female adults visited the nest for oviposition. Although larvae of A. rusticola were known to develop in large nests of carnivorous birds such as raptors by feeding on both of remnants of the birds' prey and decaying plant matter, we revealed they also used the nest of C. corone, which is omnivorous and builds a relatively small nest, as a reproductive resource.
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  • Seiji TANAKA
    Article type: Article
    2013 Volume 16 Issue 2 Pages 113-121
    Published: April 05, 2013
    Released on J-STAGE: September 21, 2018
    JOURNAL FREE ACCESS
    A white grub beetle, Lepidiota mansueta, which had been regarded as a rare species, recently built up large populations on Majuli Island, Assam, India and started causing serious damage to various crops such as sugarcane, potatoes, green gram and Colocasia. This species has a semi-voltine life cycle, requiring 2 years to complete one generation. The main purposes of this article are to describe the life cycle of this beetle, its damage to crops and the control measures being applied and to discuss some specific problems associated with this species on this island in terms of pest management.
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  • Utsugi JINBO, Kyoichiro UEDA, Toshio INOMATA, Yoshinobu UEMURA, Masaya ...
    Article type: Article
    2013 Volume 16 Issue 2 Pages 122-125
    Published: April 05, 2013
    Released on J-STAGE: September 21, 2018
    JOURNAL FREE ACCESS
    The website "Current Checklist of Japanese Butterflies" (http://binran.lepimages.jp/) is made for a handy reference from the checklist of Japanese Lepidoptera, which is edited and will be issued by the Entomological Society of Japan. A total of 328 species are listed and arranged systematically. This website is constructed based on a web-based database system for species names built by one of the authors. Recently, a Creative Commons license has been granted for the contents to disseminate information to a wide range of users and to promote its effective use.
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