Survey of trombiculid mites in Yokohama-city (original) (raw)

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

A summary of the Chiba Section, Japan

The Journal of the Geological Society of Japan, 2019

We propose the extensively studied Chiba section of the Chiba composite section (CbCS) as the Global Boundary Stratotype Section and Point (GSSP) to define the base of the Middle Pleistocene Subseries and Chibanian Stage. The CbCS is a continuous and expanded marine sedimentary succession within the middle of the Kokumoto Formation, Boso Peninsula, Chiba Prefecture. It contains well-preserved pollen, marine micro-and macrofossils, a tightly-defined Matuyama-Brunhes (M-B) paleomagnetic polarity boundary, and numerous tephra beds, allowing the establishment of a robust and precise chronostratigraphic framework across the Lower-Middle Pleistocene boundary. Its deep-marine, open-ocean continental slope setting, coupled with high sedimentation rates with no evidence of abrupt deposition, has resulted in preserving both terrestrial and marine environmental changes in and around Marine Isotope Stage (MIS). We have performed high-resolution oxygen isotope analysis, as well as detailed sedimentological, geochemical, and biostratigraphic studies of the CbCS, confirming the completeness of the stratigraphic interval spanning the Lower-Middle Pleistocene boundary. The M-B polarity boundary serves as the agreed primary guide for the Lower-Middle Pleistocene boundary, and the CbCS represents one of the most detailed marine sedimentary records yet obtained for this reversal, yielding an astronomical age of. ka with a duration of ca.. kyr. This section therefore offers an exceptional opportunity to calibrate the geological time scale as well as understand the dynamics of the geodynamo. The widespread Byk-E tephra lies close to the reversal, allowing precise regional lithostratigraphic correlation. The CbCS is easy to access from international airports. The section will be permanently preserved and maintained by the local government as a natural monument. Based on these attributes, the base of the Byk-E tephra bed in the Chiba section is the best horizon for establishing the GSSP that will define the Lower-Middle Pleistocene boundary.

The oviposition situations of gypsy moth Lymantria dispar in Nara campus of Kindai University after 5 years for their outbreak

1990

Synopsis Oviposition sites and egg batches of gypsy moth, Lymantria dispar were studied in Nara campus of Kinki University after 5 years for their outbreak in June 2013. Ten egg batches were found among on the ceilings, walls and pillars in outdoor facilities, but no egg batch was found on trunks and branches of their host trees. This tendency might be caused by oviposition site selection if they avoided laying their eggs on tree trunks and branches where the direct light entered, and they laid on the artificial structures in the shade.