Medical Entomology and Zoology
Online ISSN : 2185-5609
Print ISSN : 0424-7086
ISSN-L : 0424-7086
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Volume 31, Issue 1
Displaying 1-15 of 15 articles from this issue
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  • [title in Japanese]
    Article type: Cover
    1980 Volume 31 Issue 1 Pages Cover2-
    Published: March 15, 1980
    Released on J-STAGE: September 03, 2016
    DOIhttps://doi.org/10.7601/mez.31.Cover2
    JOURNAL FREE ACCESS
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  • The spatial distribution pattern of the daytime-resting populations of adult mosquitoes in the paddy area
    Yoshiaki KAROJI
    Article type: Article
    1980 Volume 31 Issue 1 Pages 1-6
    Published: March 15, 1980
    Released on J-STAGE: September 03, 2016
    DOIhttps://doi.org/10.7601/mez.31.1
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    The spatial distribution pattern of the populations of adult mosquitoes resting in the daytime was estimated by using Morisita's I_δ-index. Mosquitoes were collected once a week in the daytime with a sampling cage at a swamp and adjacent rice fields in the suburbs of Kyoto in 1973 and 1974. I_δ-index was calculated for males, females and the different stages of females (unfed, fed and gravid) as far as possible in Culex pipiens pallens, Cx. tritaeniorhynchus and Anopheles sinensis which were the dominant species at each sampling site. As a result, the greater part of I_δ-indices was larger than unity meaning that the spatial distribution was generally the contagious distribution irrespective of species, sex and stage. It was considered that the contagious distribution might chiefly be caused by the environmental gradient such as the differences in light intensity in the resting places.
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  • Susceptibility of the smoky-brown cockroach, Periplaneta fuliginosa, to the cockroach virus
    Chiharu SUTO, Fumihiko KAWAMOTO, Nobuo KUMADA
    Article type: Article
    1980 Volume 31 Issue 1 Pages 7-13
    Published: March 15, 1980
    Released on J-STAGE: September 03, 2016
    DOIhttps://doi.org/10.7601/mez.31.7
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    As a part of our investigation of the cockroach virus, isolated in 1977 and tentatively placed in the Densovirus group, studies were made of some factors governing the susceptibility of the smoky-brown cockroach, Periplaneta fuliginosa, to the virus. 1) When infected perorally with the virus, the susceptibility of the late instar nymphs seemed to be higher than that of the first instar nymphs. In the group subjected to intrahemocoeliac infection of the virus, the adults were more susceptible than the late instar nymphs, Thus, it can be said that susceptibility to the virus increases with the age of the cockroaches. 2) The first instar nymphs inoculated perorally with a higher dose of the virus were apparently retarded in their development compared with those inoculated with a lower dose. 3) The late instar nymphs were more susceptible to intrahemocoeliac than peroral infection by the virus. 4) The mean lethal time following virus infection in the late instar nymphs was shortened as the ambient temperature was increased up to 30℃. However, they were resistant to the infection when reared at a higher temperature of 35℃. The minimum effective temperature for the development of the infection was estimated to be 13℃, regardless of the inoculum sizes tested. 5) About 80% of some three hundred late instar nymphs reared in a breeding cage abruptly died over about two months. The cause was later determined to be the virus infection because of symptoms peculiar to the virus infection and successful recovery of the virus from the dead cockroaches.
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  • Notes on the Japanese species of the genus Corethrella, with the description of a new species : Diptera Chaoboridae
    Ichiro MIYAGI
    Article type: Article
    1980 Volume 31 Issue 1 Pages 15-21
    Published: March 15, 1980
    Released on J-STAGE: September 03, 2016
    DOIhttps://doi.org/10.7601/mez.31.15
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    The present paper deals with 4 species belonging to Corethrella Coquillett. One new species is described, and a new combination and a new name are proposed.
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  • Arbovirus infections in the mosquitoes of Fukuoka area, Kyushu, Japan : 2. Natural infection of mosquitoes with the viruses of Getah complex in the period from 1963 to 1972
    Hideho YAMAMOTO
    Article type: Article
    1980 Volume 31 Issue 1 Pages 23-30
    Published: March 15, 1980
    Released on J-STAGE: September 03, 2016
    DOIhttps://doi.org/10.7601/mez.31.23
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    The natural infection of mosquitoes with the viruses of Getah complex was studied in Fukuoka area in the period from 1963 to 1972. During the period, virus isolation attempts were held with 205,095 females of Culex tritaeniorhynchus Giles and 7,636 females of the other four species of mosquitoes, and 254 isolates were obtained. All the isolates came from the C. tritaeniorhynchus mosquitoes. Nine of them were tentatively identified as the viruses of Getah complex through the hemagglutination-inhibition tests. The results of the perennial searches for the viruses in the mosquitoes showed that the natural infection with the viruses occasionally took place among C. tritaeniorhynchus mosquitoes but never became prevalent among them in the area.
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  • Revision of the genus Prosimulium Roubaud (Diptera : Simuliidae) of Japan : III. The subgenus Twinnia Stone and Jamnback, 1955 stat. n.
    Kiichi UEMOTO
    Article type: Article
    1980 Volume 31 Issue 1 Pages 31-40
    Published: March 15, 1980
    Released on J-STAGE: September 03, 2016
    DOIhttps://doi.org/10.7601/mez.31.31
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    A taxonomic revision is given for the species, Prosimulium (Twinnia) japonense (Rubzov), 1973 stat. n. and comb. n. and it is emphasized that the segregate Twinnia should be accepted as a subgenus of the genus Prosimulium Roubaud in accordance with the current development on the larval morphology of black flies.
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  • Ecological studies of the mosquito fish (Gambusia affinis) in Tokushima City, Japan
    Yoshinori HIROSE, Seiichi KASUGA, Shinya OKUBO
    Article type: Article
    1980 Volume 31 Issue 1 Pages 41-48
    Published: March 15, 1980
    Released on J-STAGE: September 03, 2016
    DOIhttps://doi.org/10.7601/mez.31.41
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    An ecological study of the mosquito fish, Gambusia affinis, was carried out at two typical habitats in Tokushima City (34°4′N) in Japan from September 1975 to March 1977. The first habitat (St. 1) was a pond in a park, about 500m^2 in area and about 1.5m deep..Shrimp (Palaemon paucidens), crayfish (Cambaroides japonicus and Procambarus clarki), and carp (Cyprinus carpio) were present but no particular food had been given to them. The other habitat (St. 2) was an irrigation ditch of brackish water, 1.2-2m wide and 10-50cm deep. Crayfish, crucian carp (Carassius gibelio langsdorfi), and tadpoles (Rana catesbeiana etc.) were present in this habitat. The differences in the ecology and physiology of the fish at the two stations were as follows. 1. The rate of young fish in the breeding season was lower at St. 1 than at St. 2. 2. Fecundity was significantly lower at St. 1 than at St. 2. 3. The beginning of the breeding season was earlier at St. 2 than at St. 1. 4. The gonadosomatic index (GSI=wet ovary weight×100/wet body weight) was lower at St. 1. than St. 2. 5. No increase of the female hepatosomatic index (HSI=wet liver weight×100/wet body weight) before the breeding season occurred at St. 1. 6. An abnormal parenchyma of male liver was observed only at St. 1. From these observations, it is suggested that foods for the fish are scarce at St. 1. Many Gambusia were overwintering at places more than 50cm deep in both St. 1 and 2. Such overwintering places will be necessary to maintain a stock population of the fish for the use of biological control.
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  • Pheromone study on acarid mites III : Citral isolation and identification from four species of acarid mites, and its possible role
    Yasumasa KUWAHARA, Hiroshi FUKAMI, Shojiro ISHII, Katsuhiko MATSUMOTO, ...
    Article type: Article
    1980 Volume 31 Issue 1 Pages 49-52
    Published: March 15, 1980
    Released on J-STAGE: September 03, 2016
    DOIhttps://doi.org/10.7601/mez.31.49
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    The alarm pheromone was isolated from Carpoglyphus lactis through the bioassay against the mold mite, Tyrophagus putrescentiae, and the compound was identified to be citral, (E and Z)-3,7-dimethylocta-2,6-dienal. The occurence of citral in three other related species, Aleuroglyphus ovatus, Lardoglyphus konoi and Dermatophagoides farinae were also chromatographically demonstrated.
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  • Descriptions of three species of muscid larvae and eggs newly recorded from cow dung in Japan : Diptera : Muscidae
    Mitsuhiro IWASA
    Article type: Article
    1980 Volume 31 Issue 1 Pages 53-56
    Published: March 15, 1980
    Released on J-STAGE: September 03, 2016
    DOIhttps://doi.org/10.7601/mez.31.53
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    The 3rd instar larvae and eggs of one species of the genus Polietes and two species of the genus Hydrotaea are described and figured. These are P. nigrolimbatus (Bonsdorff), H. albipuncta (Zetterstedt), and H. meteorica (Linnaeus). Among these, P. nigrolimbatus and H. meteorica are newly described, and H. albipuncta is redescribed.
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  • Field studies on the gonotrophic cycle of Culex tritaeniorhynchus
    Kazuo BUEI, Sumiyo ITO, Hiroshi NAKAMURA, Masahiro YOSHIDA
    Article type: Article
    1980 Volume 31 Issue 1 Pages 57-62
    Published: March 15, 1980
    Released on J-STAGE: September 03, 2016
    DOIhttps://doi.org/10.7601/mez.31.57
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    The gonotrophic cycle of Culex tritaeniorhynchus, the principal vector of Japanese encephalitis, was studied in the field by the method of release and recapture of marked mosquitoes. It was found that the time period was 2.6 days between the emergence and the first blood ingestion, 2.9 days between the first and the second blood ingestion, and 2.9 days between the second and the third blood ingestion, and the pre-oviposition period was 5.4 days.
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  • Effects of insecticide oils on mosquito larvae of Culex pipiens pallens under the semi-field condition
    Ikuko SAKAKI
    Article type: Article
    1980 Volume 31 Issue 1 Pages 64-66
    Published: March 15, 1980
    Released on J-STAGE: September 03, 2016
    DOIhttps://doi.org/10.7601/mez.31.64
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    A small scale field trial applying oil spray formulation of six kinds of insecticides-1% fenitrothion, 1% malathion, 0.5% diazinon, 0.5% fenthion, 0.5% naled and 0.3% dichlorvos-was carried out in Saitama Prefecture during August-Novenber, 1976 in order to determine the practical effective dosage as well as the duration of activity for the control of mosquito larvae. It was confirmed that minimum effective rates of application of the oil formulations were 5-10ml per m^2. Although the spreading capacity of these formulations over water surfaces was good enough, the effectiveness continued for 2 days for fenitrothion and diazinon, and only one daysfor the other insecticides. In autumm however, the residual effects extended remarkably more than those described above in all the oil solution type insecticides, especially in diazinon. Naled was inferior in this respect.
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  • Mites of household pet animals and their pathogenic effects on the owners (supplement)
    Munetsugu OGATA, Hiroshi ITAGAKI, Tatsuo SUZUKI, Fumio ISHIDA
    Article type: Article
    1980 Volume 31 Issue 1 Pages 67-68
    Published: March 15, 1980
    Released on J-STAGE: September 03, 2016
    DOIhttps://doi.org/10.7601/mez.31.67
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    The authors (1978b) described the mites of house-hold pet animals and their pathogenic effects on the owners. Since then, four species of mites were obtained from cats, a rabbit, and budgerigars. The mites detected were Cheyletiella blakei (Smiley, 1970) from two cats, Cheyletiella parasitivorax (Megnin, 1878) from a rabbit, and feather mites belonging to the family Dermoglyphidae (Megnin et Troussart, 1883) and Tyrophagus putrescentiae (Shrank, 1781) from some of the budgerigars. Of these four species of mite, C. blakei and C. parasitivorax are suspected to attack the owners of the animals.
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  • Multiplication of chikungunya virus in male Culex pipiens molestus
    Hiroshi YAMANISHI, Toshiko SAWAYAMA, Takeo MATSUMURA
    Article type: Article
    1980 Volume 31 Issue 1 Pages 69-70
    Published: March 15, 1980
    Released on J-STAGE: September 03, 2016
    DOIhttps://doi.org/10.7601/mez.31.69
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    [in Japanese]
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  • A record of Hippobosca longipennis (Fabricius, 1805) (Diptera, Hippoboscidae) from Japan
    Motoyoshi MOGI
    Article type: Article
    1980 Volume 31 Issue 1 Pages 71-72
    Published: March 15, 1980
    Released on J-STAGE: September 03, 2016
    DOIhttps://doi.org/10.7601/mez.31.71
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    [in Japanese]
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  • [title in Japanese]
    Article type: Cover
    1980 Volume 31 Issue 1 Pages Cover4-
    Published: March 15, 1980
    Released on J-STAGE: September 03, 2016
    DOIhttps://doi.org/10.7601/mez.31.Cover4
    JOURNAL FREE ACCESS
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