4 Temporal and spatial variation of the number of Aedes albopictus eggs in ovitraps in small hill surrounded by human dwellings in Nagasaki (original) (raw)

Impacts of population decline of hillside residential areas on the nightscape of Nagasaki City

Journal of The Japanese Institute of Landscape Architecture, 2016

The study aims to identify the impacts of population decline on the nightscape of Nagasaki City, which has been acknowledged by tourists as one of three major nightscapes in Japan. In particular, the focus was given to hillside residential areas, which frame the landscape of Nagasaki. The study was conducted by following three steps procedure as a) visualizing the present nightscape by using ArcMap and ArcScene, b) developing scenarios on future population decline, and c) visualizing future nightscapes based on the scenarios. The scenarios developed are based on two hypotheses on the future population of Nagasaki as the decline will occur; 1) equally throughout the entire city, and 2) exclusively at the hillside residential areas because of their inconvenience especially for elderly people. The study identifies that the nightscape following the scenario 1 will become deteriorated compared to the present but still may maintain its character, while the scenario 2 will lead the nightscape to lose its identity. It is therefore concluded that taking measures to suppress depopulation of the hillside residential areas are indispensable to maintain the identity of Nagasaki's nightscape.

Occurrence of vector mosquitoes at Tsunami disaster areas of the Great East Japan Earthquake

Medical Entomology and Zoology, 2012

To evaluate vector situations in the disaster areas of the Great East Japan Earthquake we conducted eld studies on the occurrence of mosquitoes in Rikuzentakata City, Iwate Prefecture and Kesennuma City, Miyagi Prefecture almost every three weeks from June to October and in Minamisoma City, Fukushima Pefecture in September 2011. For adult collections we placed dry-ice baited CDC-light traps at selected sites and captured totals of 3,088 Culex pipiens, 1,430 Cx. tritaeniorhynchus, 62 Aedes albopictus, 58 Cx. inatomii, 13 Anopheles sinensis, and 8 Ae. togoi. e rst two species were captured in large quantities. Mean adult density of Cx. pipiens pallens, Cx. tritaeniorhynchus and Cx. inatomii at Tsunami sub-area was signi cantly higher than No Tsunami and boundary sub-area. In

Epidemiological Survey of Leptospira Antibodies in Raccoons and Dogs in Osaka and Hyogo Prefectures

Journal of the Japan Veterinary Medical Association, 2010

In the present study, serum samples were collected from feral raccoons (n 186) captured in the southern part of Osaka Prefecture (A) and the eastern part of Hyogo Prefecture (B), as well as from pet dogs (n 52) in the same regions. Anti-Leptospira interrogans antibodies were evaluated with a microscopic agglutination test (MAT), using five major L. interrogans serovars as antigens. In both regions, the most frequently detected serovar was hebdomadis (A : 31.5% and B : 51.5%) in raccoons, but these serovars were not detected from the pet dogs. L. interrogans-specific PCR analysis revealed that eight out of 66 (12.1%) raccoons were infected with the pathogen. These observations revealed that a high percentage of feral raccoons are infected with Leptospira interrogans, but that transmission may not occur between the raccoons and dogs.