14 Works

Venus Climate Orbiter Akatsuki IR1 Longitude-Latitude Map Data

Shin-ya Murakami, Kazunori Ogohara, Masahiro Takagi, Hiroki Kashimura, Manabu Yamada, Toru Kouyama, Takeshi Horinouchi & Takeshi Imamura
This dataset contains longitude-latitude map data created from images acquired by the IR1 instrument of the Venus Climate Orbiter (VCO, also known as PLANET-C and AKATSUKI) spacecraft. This dataset consists of NetCDF and FITS files. The longitude-latitude map data are included as Level 3 product in NetCDF. During process of creating longitude-latitude map data, pointing of spacecraft was corrected using limb-fitting technique. Detected limb points and information on fitted ellipse are provided as auxiliary data,...

Venus Climate Orbiter Akatsuki IR2 Longitude-Latitude Map Data

Shin-ya Murakami, Kazunori Ogohara, Masahiro Takagi, Hiroki Kashimura, Manabu Yamada, Toru Kouyama, Takeshi Horinouchi & Takeshi Imamura
This dataset contains longitude-latitude map data created from images acquired by the IR2 instrument of the Venus Climate Orbiter (VCO, also known as PLANET-C and AKATSUKI) spacecraft. This dataset consists of NetCDF and FITS files. The longitude-latitude map data are included as Level 3 product in NetCDF. During process of creating longitude-latitude map data, pointing of spacecraft was corrected using limb-fitting technique. Detected limb points and information on fitted ellipse are provided as auxiliary data,...

Data from: Acoustic emissions of Sorex unguiculatus (Mammalia: Soricidae): assessing the echo-based orientation hypothesis

Lida Sanchez, Satoshi D. Ohdachi, Atsushi Kawahara, Lazaro M. Echenique-Diaz, Shinichiro Maruyama & Masakado Kawata
Shrew species have been proposed to utilize an echo-based orientation system to obtain additional acoustic information while surveying their environments. This system has been supported by changes in vocal emission rates when shrews encounter different habitats of varying complexity, although detailed acoustic features in this system have not been reported. In this study, behavioral experiments were conducted using the long-clawed shrew (Sorex unguiculatus) to assess this orientation system. Three experimental conditions were set, two of...

Data from: Heterochromatin suppresses gross chromosomal rearrangements at centromeres by repressing Tfs1/TFIIS-dependent transcription

Akiko K. Okita, Faria Zafar, Jie Su, Dayalini Weerasekara, Takuya Kajitani, Tatsuro S. Takahashi, Hiroshi Kimura, Yota Murakami, Hisao Masukata & Takuro Nakagawa
Heterochromatin that is characterized by histone H3 lysine 9 (H3K9) methylation assembles on repetitive regions including centromeres. Although centromeric heterochromatin is important for faithful segregation of chromosomes, its role in maintaining centromere integrity remains elusive. Here, we found in fission yeast that heterochromatin suppresses gross chromosomal rearrangements (GCRs) at centromeres. Mutations in Clr4/Suv39 methyltransferase increased the formation of isochromosomes whose breakpoints are present in centromere repeats. H3K9A and H3K9R mutations also increased GCRs, suggesting that...

Data from: A key metabolic gene for recurrent freshwater colonization and radiation in fishes

Asano Ishikawa, Naoki Kabeya, Koki Ikeya, Ryo Kakioka, Jennifer N. Cech, Naoki Osada, Miguel C. Leal, Jun Inoue, Manabu Kume, Atsushi Toyoda, Ayumi Tezuka, Atsushi J. Nagano, Yo Y. Yamasaki, Yuto Suzuki, Tomoyuki Kokita, Hiroshi Takahashi, Kay Lucek, David Marques, Yusuke Takehana, Kiyoshi Naruse, Seiichi Mori, Oscar Monroig, Nemiah Ladd, Carsten J. Schubert, Blake Matthews … & Jun Kitano
Colonization of new ecological niches has triggered large adaptive radiations. Although some lineages have made use of such opportunities, not all do so. The factors causing this variation among lineages are largely unknown. Here, we show that deficiency in docosahexaenoic acid (DHA), an essential ω-3 fatty acid, can constrain freshwater colonization by marine fishes. Our genomic analyses revealed multiple independent duplications of the fatty acid desaturase gene Fads2 in stickleback lineages that subsequently colonized and...

Data from: Genomic reconstruction of 100 000-year grassland history in a forested country: population dynamics of specialist forbs

Yuichi Yamaura, Ayu Narita, Yoshinobu Kusumoto, Atsushi J. Nagano, Ayumi Tezuka, Toru Okamoto, Hikaru Takahara, Futoshi Nakamura, Yuji Isagi & David Lindenmayer
Grassland ecosystems worldwide have been extensively converted to other land uses and are globally imperiled. Because many grasslands have been maintained by human activities, understanding their origin and history is fundamentally important to better contemporary management. However, existing methods to reconstruct past vegetation can produce contrasting views on grassland history. Here, we inferred demographic histories of 40 populations of four grassland forb species throughout Japan using high-resolution genome sequences and model-flexible demographic simulation based on...

Data from: When spring ephemerals fail to meet pollinators: mechanism of phenological mismatch and its impact on plant reproduction

Gaku Kudo & Elisabeth Cooper
The flowering phenology of early-blooming plants is largely determined by snowmelt timing in high-latitude and high-altitude ecosystems. When the synchrony of flowering and pollinator emergence is disturbed by climate change, seed production may be restricted due to insufficient pollination success. We revealed the mechanism of phenological mismatch between a spring ephemeral (Corydalis ambigua) and its pollinator (overwintered bumble bees), and its impact on plant reproduction, based on 19 years of monitoring and a snow removal...

Data from: Early-life lessons of the courtship dance in a dance-duetting songbird, the Java sparrow

Masayo Soma, Midori Iwama, Ryoko Nakajima & Rika Endo
Vocal-learners, such as songbirds, must practice singing in a developmentally sensitive period to master songs. Yet, knowledge remains limited about the development of visual displays in birds, even when courtship includes well-coordinated vocalizations (songs) and body motions. The Java sparrow (Lonchura oryzivora) is a species of songbird that exhibits a courtship duet dancing exchange between the sexes, with this behaviour driving mating success. In this study, juvenile male Java sparrows were observed in captivity, showing...

Data from: Incidence of multiple paternity and inbreeding in high-density brown bear populations on the Shiretoko Peninsula, Hokkaido, Japan

Michito Shimozuru, Yuri Shirane, Hifumi Tsuruga, Masami Yamanaka, Masanao Nakanishi, Tsuyoshi Ishinazaka, Shinsuke Kasai, Takane Nose, Yasushi Masuda, Yasushi Fujimoto, Tsutomu Mano & Toshio Tsubota
Understanding the breeding ecology of a species is essential for the appropriate conservation and management of wildlife. In brown bears, females occasionally copulate with multiple males in one breeding season, which may lead to multiple paternity in a single litter. In contrast, inbreeding, a potential factor in the reduction of genetic diversity, may occur, particularly in threatened populations. However, few studies have reported the frequency of these phenomena in brown bear populations. Here, we investigated...

Data from: Mechanisms underlying predator-driven biotic resistance against introduced barnacles on the Pacific coast of Hokkaido, Japan

Takefumi Yorisue, Julius A. Ellrich & Kyosuke Momota
Introduced species are a major threat to coastal ecosystems worldwide. Thus, understanding biotic resistance (i.e. the ability of native species to limit introduced species) is a central goal of invasion biology. This paper examines mechanisms underlying biotic resistance. Consumption can limit introduced prey provided that native predators prefer such prey. Furthermore, predator nonconsumptive effects (NCEs), mediated through predator-released cues perceived by prey, can limit prey recruitment, a key demographic process for prey populations. However, information...

Plant community assembly in suburban vacant lots depends on earthmoving legacy, habitat connectivity, and current mowing frequency

Yoichi Tsuzuki, Tomoyo Koyanagi & Tadashi Miyashita
In suburban regions, vacant lots potentially offer significant opportunities for biodiversity conservation. Recently, in Japan, due to an economic recession, some previously developed lands have become vacant. Little is known, however, about the legacy of earlier earthmoving, which involves topsoil removal and ground levelling before residential construction, on plant community composition in such vacant lots. To understand (dis)assembly processes in vacant lots, we studied 24 grasslands in a suburban region in Japan: 12 grasslands that...

Venus Climate Orbiter Akatsuki UVI Longitude-Latitude Map Data

Shin-ya Murakami, Kazunori Ogohara, Masahiro Takagi, Hiroki Kashimura, Manabu Yamada, Toru Kouyama, Takeshi Horinouchi & Takeshi Imamura
This dataset contains longitude-latitude map data created from images acquired by the UVI instrument of the Venus Climate Orbiter (VCO, also known as PLANET-C and AKATSUKI) spacecraft. This dataset consists of NetCDF and FITS files. The longitude-latitude map data are included as Level 3 product in NetCDF. During process of creating longitude-latitude map data, pointing of spacecraft was corrected using limb-fitting technique. Detected limb points and information on fitted ellipse are provided as auxiliary data,...

Data from: Contribution of small isolated habitats in creating refuges from biological invasions along a geomorphological gradient of floodplain waterbodies

Nobuo Ishiyama, Kazuki Miura, Satoshi Yamanaka, Junjiro Negishi & Futoshi Nakamura
1. Habitat fragmentation, which involves habitat size reduction and isolation, is a major cause of biodiversity decline. However, interest in small isolated habitats has increased among ecosystem managers because these fragments can serve as remnant refuges for unique and/or endangered species in human-altered landscapes. 2. In a fragmented floodplain of northern Japan, we demonstrate how habitat fragmentation and habitat quality shape the refuges for a unique endangered minnow (Rhynchocypris percnurus sachalinensis) from biological invasions. We...

Venus Climate Orbiter Akatsuki LIR Longitude-Latitude Map Data

Shin-ya Murakami, Kazunori Ogohara, Masahiro Takagi, Hiroki Kashimura, Manabu Yamada, Toru Kouyama, Takeshi Horinouchi & Takeshi Imamura
This dataset contains longitude-latitude map data created from images acquired by the LIR instrument of the Venus Climate Orbiter (VCO, also known as PLANET-C and AKATSUKI) spacecraft. This dataset consists of NetCDF and FITS files. The longitude-latitude map data are included as Level 3 product in NetCDF. During process of creating longitude-latitude map data, pointing of spacecraft was corrected using limb-fitting technique. Detected limb points and information on fitted ellipse are provided as auxiliary data,...

Registration Year

  • 2019
    14

Resource Types

  • Dataset
    14

Affiliations

  • Hokkaido University
    14
  • Chiba Institute of Technology
    4
  • National Institute of Advanced Industrial Science and Technology
    4
  • Kobe University
    4
  • The University of Tokyo
    4
  • Japan Aerospace Exploration Agency
    4
  • Kyoto Sangyo University
    4
  • Ryukoku University
    2
  • Hokkaido Research Organization
    2
  • Forestry and Forest Products Research Institute
    2