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Volume 62 (2011)
- Issue 4 Pages 211-
- Issue 3 Pages 181-
- Issue 2 Pages 85-
- Issue 1 Pages 1-
Volume 62, Issue 2
Displaying 1-5 of 5 articles from this issue
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Original Articles
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Yoshio TSUDA, Wannapa SUWONKERD, Masahiro TAKAGI2011 Volume 62 Issue 2 Pages 85-92
Published: June 15, 2011
Released on J-STAGE: December 15, 2011
JOURNAL FREE ACCESSMark-release-recapture studies with anopheline mosquitoes were conducted 2 times in Northern Thailand in October and November 1995. In the first experiment, 3,744 females of 12 anopheline species were collected, marked and released to examine flight distances. The mosquitoes were recaptured at 5 sites with different distances from the release site (60, 400, 1,000, 2,000, and 2,700 m) by human and buffalo bait collections for 4 days. The recapture rate of the 5 major anopheline species ranged from 0.72 to 1.23%. The recapture rate of An. aconitus, the dominant species of the study area, was 0.92% and 3 marked An. aconitus were recaptured at 2,700 m away from the release site. In the second experiment, a total of 9,374 females of 11 anopheline species were released to estimate the daily survival rate of An. aconitus and confirm flight distance. The recapture rate of An. aconitus was 1.46% and An. aconitus (1), An. minimus (1), An. tessellatus (1) and An. hyrcanus gr. (7) were recaptured at 2,700 m distant from the release site. The survival rates of An. aconitus were estimated as 0.618 and 0.624/day by the modified triple catch method and log-regression analysis, respectively. Degree of anthropophily was evaluated by the ratios of human to buffalo landing rates of released anopheline species. Based on flight distance, survival rate and degree of anthropophily, the vector competence of An. aconitus is discussed.View full abstractDownload PDF (408K) -
Ichiro MIYAGI, Takako TOMA, Takao OKAZAWA, Moi Ung LEH2011 Volume 62 Issue 2 Pages 93-99
Published: June 15, 2011
Released on J-STAGE: December 15, 2011
JOURNAL FREE ACCESSPupa and larva of Topomyia (Topomyia) rubithoracis are described and illustrated for the first time on the basis of specimens collected in Sarawak, Malaysia. This is a new distribution record of this species outside of the type-locality, Selangor, Peninsular Malaysia. The larvae breed exclusively in bamboo stumps and internodes. It is compared to Topomyia (Topomyia) gracilis Leicester.View full abstractDownload PDF (313K) -
Yuichiro TABARU, Sakura KAMIYA, Yasuhiro WATABE2011 Volume 62 Issue 2 Pages 101-107
Published: June 15, 2011
Released on J-STAGE: December 15, 2011
JOURNAL FREE ACCESSThe capture ratio of adhesive traps for German cockroaches, Blattella germanica, American cockroaches, Periplaneta americana, and brown cockroaches, P. brunnea, was examined every day in a test arena for 8 or 6 days. The capture ratio decreased day by day during the experiments. When nymphs and adult German cockroaches were introduced together at the same time, the males were more easily trapped than the females and nymphs. The females and nymphs of the German cockroach seemed to be more reluctant to cross the sticky surface in consecutive days. The trap ratio was compared between the experienced cockroaches that survived without being trapped for a week and the inexperienced cockroaches that were newly introduced to the test arena from a breeding chamber. The trap ratio of the experienced cockroaches was significantly lower than the inexperienced cockroaches suggesting an escape behavior in experienced cockroaches. Escape behavior was effective to reduce the trap ratio after an interruption period of 5 wk during which the experienced cockroaches were reared without exposure to adhesive traps. Learning of escape behavior to avoid crossing the adhesive surface suggests a possible explanation for trap results.View full abstractDownload PDF (629K) -
Shogo SHIRAISHI2011 Volume 62 Issue 2 Pages 109-116
Published: June 15, 2011
Released on J-STAGE: December 15, 2011
JOURNAL FREE ACCESSField collections of mosquito larvae were conducted from 12 different larval habitats found at 34 collection sites in Ehime prefecture, western Japan during 2009-2010. A total of 24 mosquito species in 8 genera were collected, including the following 6 newly recorded species from Ehime Prefecture; Culex infantulus, Aedes oreophilus, Ae. koreicoides, Ae. kobayashii, Topomyia yanbarensis and Orthopodomyia anopheloides. Three dominant species, Ae. japonicus, Tripteroides bambusa and Cx. sasai, occupied a wide variety of larval habitats and occurred in the entire period of mosquito breeding season from April to November. Four of the newly recorded species, Aedes oreophilus, Ae. koreicoides, Ae. kobayashii, To. yanbarensis were found from restricted types of larval habitats, such as stone pot, bamboo stump and bamboo internode, and larvae occurred in a limited period of breeding season from April to July, suggested a low chance of encounter during larval collections.View full abstractDownload PDF (640K)
Short Communications
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Hisayoshi YOSHIDA, Mitsuko MATSUO, Kiyoko UCHINO, Tatsuya MIYOSHI, Tom ...2011 Volume 62 Issue 2 Pages 117-124
Published: June 15, 2011
Released on J-STAGE: December 15, 2011
JOURNAL FREE ACCESSRecent entomological studies carried out in Sakai City, Osaka, Japan showed a high density of Culex pipiens complex. We performed PCR-based molecular identification of Cx. pipiens complex to show local distribution of the members of Cx. pipiens complex and variation of the species composition in Sakai City. CDC miniature suction traps without a lamp enhanced with 1 kg of dry ice were used to collect adult mosquitoes at 12 collection sites from April 2009 to March 2010. Among 1,591 Cx. pipiens complex collected in this study, 1,044 (65.6%) were identified as Cx. p. pallens, 474 (29.8%) were Cx. p. form molestus, 62 were hybrids between Cx. p. pallens and Cx. p. form molestus, and 3 were identified as Cx. quinquefasciatus. Culex p. pallens were not collected in winter from December 2009 to March 2010. Culex p. form molestus were not collected in January to March 2010. Hybrids between Cx. p. pallens and Cx. p. form molestus were not collected in December 2009 and January 2010. Culex quinquefasciatus was collected at 3 different collection sites in summer from July to September 2009. The Cx. pipiens complex composition was significantly different among 3 different categories of collection site.View full abstractDownload PDF (1467K)
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