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Volume 61 (2010)
- Issue 4 Pages 327-
- Issue 3 Pages 211-
- Issue 2 Pages 97-
- Issue 1 Pages 1-
Volume 61, Issue 4
Displaying 1-6 of 6 articles from this issue
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Original Articles
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Rie KATANO, Yoshio TSUDA, Yasuhide SAITOH, Mutsuo KOBAYASHI2010 Volume 61 Issue 4 Pages 327-333
Published: December 15, 2010
Released on J-STAGE: June 15, 2011
JOURNAL FREE ACCESSLaboratory experiments were carried out on the effects of salinity and temperature on larval development of Culex inatomii, and the oviposition and blood-feeding activity of emerging females during the cool season. Hatchability, survival rate of larvae, and developmental period from hatch to adult emergence were examined in water containing 0 to 1.6% NaCl. The highest hatching rate (0.91) and pupation rate (0.91) was observed when eggs and larvae were reared in water with 0.6% NaCl. Developmental period from hatch to adult emergence for females was about 12 days within a salinity range of 0 to 1.0%, and larval development was delayed at higher salinities from 1.2 to 1.6%. Development and survival of hatched larvae were examined under 6 different air temperatures between 18°C and 29°C, and the results indicated an optimum air temperature for larval survival of approximately 25°C. The relationship between air temperature and developmental rate of Cx. inatomii larvae was analyzed by the linear regression method, and threshold air temperature for larval development was 8.75°C and 9.51°C for females and males. Cohorts of young larvae were reared in the laboratory without temperature control to examine development to adult and reproduction of emerging adults during the cool season. The results of exposure experiments in October-November and early March showed a low adult emergence rate of 0.01 to 0.14 and no egg production. The females oviposited when they were reared under changing temperatures in mid-March and April during the larval stage. Fifty-five to 88% of emerging females laid eggs autogenously, and 41% of the females took more than two blood meals during their life.View full abstractDownload PDF (638K) -
Mitsuhiro IWASA, Naotaka ISHIGURO2010 Volume 61 Issue 4 Pages 335-344
Published: December 15, 2010
Released on J-STAGE: June 15, 2011
JOURNAL FREE ACCESSMolecular analysis based on mitochondrial DNA (mtDNA) sequence was performed to elucidate the genetic difference between Haematobia irritans (Linnaeus) and H. exigua (de Meijere), and the phylogenetic relationship among Japanese Stomoxyini species (Stomoxys calcitrans (Linnaeus), S. indicus Picard, S. uruma Shinonaga et Kano, and Haematobosca sanguinolenta (Austen) including Haematobia). Two populations obtained from Obihiro and Morioka which were morphologically identified as H. irritans were genetically identical. Two populations obtained from Taiwan and Vietnam which were morphologically identified as H. exigua were almost genetically identical, but there was a small divergence (0.3-0.4%) between them. Nucleotide sequence divergences between H. irritans from Obihiro-Morioka and H. exigua from Taiwan-Vietnam were 1.8-1.9%, and those between Haematobia and other separate species of Stomoxys and Haematobosca were 6.7-10.9%. In cluster analysis based on mtDNA, Haematobia species were close to Haematobosca sanguinolenta. S. calcitrans and S. uruma were closely related to each other, and S. indicus was distantly related to these two species. We discussed the status of H. irritans and H. exigua based on mtDNA, and the discrepancies of molecular phylogeny versus the previous hypotheses based on morphological criteria in Japanese Stomoxyini.View full abstractDownload PDF (383K) -
Tomoyuki HASHIMOTO, Tomoko KOIZUMI, Keiko MINAGAWA, Tohru KAZUMA, Atsu ...2010 Volume 61 Issue 4 Pages 345-351
Published: December 15, 2010
Released on J-STAGE: June 15, 2011
JOURNAL FREE ACCESSQuantities of house dust mite allergens, Der 1 and Der 2, extracted from artificially-reared Dermatophagoides farinae Hughes (Df) were compared. Relationships among the allergen levels, numbers of mites (1-1,000 mites), and life stages (adult females and larvae) were analyzed. The mite samples were prepared with or without grinding. The adult females of D. pteronyssinus (Trouessart) (Dp) were also examined after grinding. The quantities of Der 1 and Der 2 were determined by ELISA using monoclonal antibodies. Overall, the allergen quantities increased depending on the numbers of mites. The Der 1 levels of 100 mites calculated were 34.6 (Df larvae) to 304 (Dp females) ng. The Der 2 levels per 100 mites were also equivalent to 85.2 (Df larvae) to 758 (Dp females) ng. The ratio of Der 1 : Der 2 was 1 : 0.95-2.65. The Df females showed significantly higher levels of allergens than the larvae. The Dp females yielded larger amounts of Der 2 than Df females, but the differences in Der 1 were not significant. The commercialized test kits to inspect mite infestation detect Der 2. There is not a standard of Der 2 for allergen avoidance, so determination of Der 2 standard is required.View full abstractDownload PDF (190K) -
Ichiro MIYAGI, Takako TOMA2010 Volume 61 Issue 4 Pages 353-361
Published: December 15, 2010
Released on J-STAGE: June 15, 2011
JOURNAL FREE ACCESSA new species, Topomyia (Suaymyia) kelabitense is described from Bario and Ba'Kelalan highlands in Sarawak, Malaysia. The adult male and female, pupa and larva are described in detail and illustrations of the male genitalia, pupa and larva are provided. This species is easily distinguished from all known species of the subgenus Suaymyia by the male genitalia and larval characters. The larva is predacious with well developed maxillae apparently adapted for grasping prey. Larvae were collected from the leaf axils of Daun Itip (Phrynium capitatum), a common plant found in mountain forests.View full abstractDownload PDF (732K) -
Hiroyuki TAKAOKA, Wichai SRISUKA, Atiporn SAEUNG, Yasushi OTSUKA, Chih ...2010 Volume 61 Issue 4 Pages 363-374
Published: December 15, 2010
Released on J-STAGE: June 15, 2011
JOURNAL FREE ACCESSThe female, male and pupa of Simulium (Montisimulium) laoleense Takaoka and Choochote are described for the first time based on adults reared from pupae and pupal exuviae collected from Siribhume Waterfall (type locality), Chiang Mai, Thailand. The number of the pupal gill filaments is corrected as 14 (not 12) on the basis of reexamination of the type larval specimens. Simulium (M.) nanense sp. nov., a close ally of S. (M.) laoleense, is also described. The morphological and molecular differences between the two species are noted.View full abstractDownload PDF (611K) -
Hiromu KURAHASHI2010 Volume 61 Issue 4 Pages 375-382
Published: December 15, 2010
Released on J-STAGE: June 15, 2011
JOURNAL FREE ACCESSTwo new species of flesh flies, Goniophyto kakinumai sp. nov. and G. ubeensis sp. nov. are described and keyed. Male genitalia and head profiles are illustrated for a practical identification.View full abstractDownload PDF (322K)
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