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Joetsu, Japan

Joetsu University of Education is a national university in Joetsu, Niigata, Japan, founded in 1978. Wikipedia.

Kiel S.,University of Gottingen | Amano K.,Joetsu University of Education
Journal of Paleontology | Year: 2013

Bathymodiolin mussels are a group of bivalves associated with deep-sea hydrothermal vents and other reducing deep-sea habitats, and they have a particularly rich early Cenozoic fossil record in western Washington State, U.S.A. Here we recognize six species from middle Eocene to latest Oligocene deep-water methane seep deposits in western Washington. Two of them are new: Vulcanidas? goederti from the middle Eocene Humptulips Formation and Bathymodiolus (sensu lato) satsopensis from the late Oligocene part of the Lincoln Creek Formation. Very similar to the latter but more elongate are specimens from the early Oligocene Jansen Creek Member of the Makah Formation and are identified as B. (s.l.) aff. satsopensis. Bathymodiolus (s.l.) inouei Amano and Jenkins, 2011 is reported from the Lincoln Creek Formation. Idas? olympicus Kiel and Goedert, 2007 was previously known from late Eocene to Oligocene whale and wood falls in western Washington and is here reported from Oligocene seep deposits of the Makah and Pysht Formations. Vulcanidas? goederti occurs at a seep deposit from a paleodepth possibly as great as 2000 m, suggesting that its living relative, Vulcanidas insolatus Cosel and Marshall, 2010, which lives at depths of only 150-500 m, is derived from a deep-water ancestor. The bathymodiolins in western Washington indicate that the group originated at least in the middle Eocene and underwent a first diversification in the late Eocene to Oligocene. Early ontogenetic shells of all fossil species investigated so far, including the middle Eocene Vulcanidas? goederti, reflect planktotrophic larval development indicating that this developmental mode is an ancestral trait of bathymodiolins.Copyright © 2013, The Paleontological Society.

Kiel S.,University of Kiel | Amano K.,Joetsu University of Education
Veliger | Year: 2010

Six fossil vesicomyid species from the Katalla district in Alaska are described and illustrated, and three of them are described as new. Calyptogena katallaensis, Archivesica marincovichi, and Archivesica sp. are from the Oligocene Kulthieth Formation, and Archivesica redwoodia and Adulomya spp. A and B are from the lower Miocene Redwood Formation. The Oligocene Calyptogena katallaensis represents the oldest record of Calyptogena, which had previously been traced only into the late Miocene. Archivesica redwoodia shows an unusual mix of characters, including a Calyptogena-like hinge dentition, palliai sinus, and the lack of a nymphal ridge. © CMS, Inc., 2008.

Amano K.,Joetsu University of Education | Jenkins R.G.,University of Tokyo | Aikawa M.,2 8 5 Osachishizume | Nobuhara T.,University of Shizuoka
Palaeogeography, Palaeoclimatology, Palaeoecology | Year: 2010

Two large carbonate bodies within deep-water sediments of the uppermost middle Miocene Ogaya Formation at Kita-Kuroiwa, Niigata Prefecture, central Japan, are identified as an ancient hydrocarbon-seep site based on petrographic features such as acicular and sparry calcite cements, and clotted micrite with δ13C values as low as - 38.0‰ (vs. VPBD), and a low-diversity fauna of vesicomyid and mytilid bivalves, and provannid gastropods. Compared to well-studied coeval seep communities from the Japan Sea back-arc basin, species diversity is particularly low at the Kita-Kuroiwa site, while the percentage of seep-obligate taxa (taxa that are restricted to this type of environment) is very high, largely due to the absence of predatory gastropods such as naticids and buccinids. Modern seep communities show a decrease in species diversity and an increase in seep-obligate taxa with depth, due to the lower abundance and diversity of background colonists entering cold-seep habitats. Likewise, depth is here considered as the most likely cause for the observed differences in community structure, because the Kita-Kuroiwa seep site was located in considerably deeper water (1000-2000 m) than the comparable coeval seep sites in the Japan Sea back-arc basin. © 2009 Elsevier B.V. All rights reserved.

Yamamoto R.,Joetsu University of Education
Sleep and Biological Rhythms | Year: 2016

This paper reviews epidemiological findings on sleep problems among school-age children and discusses the current status and future directions of public health activities for ensuring adequate sleep. The main sleep problems for school-age children are delayed bedtimes caused by a change in the surrounding environment and resultant consequences related to sleep loss and irregular sleep–wake schedules. Health education activities and interventions aiming at improving certain environmental factors and behavioral changes have been conducted. However, some problems exist among current public health programs for ensuring adequate sleep. First, perspectives regarding physiological changes, accompanied by secondary sexual development, are lacking. Second, most existing public health activities for ensuring adequate sleep aim to disseminate knowledge and cannot achieve behavioral change. Finally, intervention perspectives within the parental and home environment are deficient. Considering such problems, the present review examines future directions for epidemiological studies on sleep problems among school-age children, with a specific emphasis on improving the effectiveness and efficacy of public health activities for ensuring adequate sleep. © 2016, Japanese Society of Sleep Research.

Amano K.,Joetsu University of Education | Jenkins R.G.,Yokohama National University
Nautilus | Year: 2011

A new species of the genus Bathymodiolus (sensu lato) is herein described from the lower Oligocène Nuibetsu Formation in eastern Hokkaido, Japan. This is the oldest species of diis genus in Japan and the second oldest world wide. Based on occurrence and distribution of fossil Bathymodiolus (sensu lato), we suggest that the "genus" spread to the whole world by the late Miocene. This dispersal pattern is supported by molecular studies and similar to that of the large vesicomyids.

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