Honyurui Kagaku (Mammalian Science)
Online ISSN : 1881-526X
Print ISSN : 0385-437X
ISSN-L : 0385-437X
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Volume 43, Issue 2
Displaying 1-10 of 10 articles from this issue
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Original Article
  • Annual changes in testicular size, plasma testosterone concentration, home range and active time in wild male marten, Martes melampus melampus
    Norihiro Kawauchi, Yuji Yamamoto, Kiyoshi Imai
    2003 Volume 43 Issue 2 Pages 93-98
    Published: 2003
    Released on J-STAGE: June 04, 2008
    DOIhttps://doi.org/10.11238/mammalianscience.43.93
    JOURNAL FREE ACCESS
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    Characteristics relating to the reproductive performance of wild male Japanese marten (Martes melampus melampus) were studied in Mt. Nyugasa, Nagano prefecture through the period from September 1996 through August 1997. Annual changes in testicular size, plasma testosterone concentration, home range and active time were analyzed in wild captured male marten and using the radio-telemetry method. The total number of animals captured and plasma samples obtained during this period were 46 individuals and 36 samples, respectively. Mean size of testes of the male marten started to increase from April and showed a peak during late June to mid July. Plasma testosterone concentrations exhibited a high level during May to June and slightly decreased in July. Home range area of the male expanded markedly in July and active time was at its peak in July and August. From these results, we concluded that the mating period in the local population of marten was mainly in July.
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  • Density estimation of Japanese hare Lepus brachyurus by fecal pellet count and INTGEP in Akita-komagatake mountainous area
    Hitoho Yatake, Makoto Nashimoto, Rikyu Matsuki, Toru Takeuchi, Seiya A ...
    2003 Volume 43 Issue 2 Pages 99-111
    Published: 2003
    Released on J-STAGE: June 04, 2008
    DOIhttps://doi.org/10.11238/mammalianscience.43.99
    JOURNAL FREE ACCESS
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    We estimated the Japanese hare (Lepus brachyurus) densities in eight different types of vegetation, using Fecal pellet count and INTGEP between 1999-2002. Vegetation was classified under forest type; Fagus crenata scrub, natural F.c. forest, secondary F.c. forest, secondary Quercus mongolica forest, mature Cryptomeria japonica forest, young C.j. forest, and grassland type; cutover land and pasture. Hare densities in the grassland were higher than those in the forest. The highest density was observed in the cutover land, showing that this type of vegetation was favorable habitat for hares. As for seasonal changes, hare densities in the forest were higher in the snow-thawing period (May and June) and snow-falling period (November-April) than in the snow-free period (July-October). Conversely, in grassland hare densities were higher in the snow-free period than in snow thawing and snow-falling period. However, the hare densities in the forest were lower than that of cutover land in the snow-thawing and snow-falling period. The seasonal changes of hare densities showed similar tendencies for four years. Distribution of fecal pellets and tracks varied among the types of vegetation and these two methods were useful in evualuating the habitat use of hares. Also, distribution of fecal pellets and tracks showed the intensity of habitat use was different among the forest, forest edge and grassland.
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  • Seasonal activity of common Japanese pipistrelle bat (Pipistrellus abramus) in urban area in relation to feeding-site selection
    Taro Tosuji, Ei'ichi Shibata
    2003 Volume 43 Issue 2 Pages 113-120
    Published: 2003
    Released on J-STAGE: June 04, 2008
    DOIhttps://doi.org/10.11238/mammalianscience.43.113
    JOURNAL FREE ACCESS
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    We investigated the seasonal activity of pipistrelle bats over the 60-ha area of Nagoya University Campus during 2000 and 2001 using the line census method and a bat detector. We divided the campus into 52cells of 100m×100m each and assessed the environmental condition of each cell as open area, secondary forest, pond, etc. We confirmed that the bats fly after sunset in February when the air temperature exceeded 15°C. The number of flights increased through the spring as air temperature increased but decreased during mid-May and early July and then increased again in late July. Flights were not detected in December when the air temperature was below 15°C. Although most insects were captured in the forest cells, bat flights were more frequent over the pond cells followed by the open area and forest cells. Perhaps the bats fly more frequently over the pond and open areas because they offer more space rather than more food.
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Short Communication
  • Distribution of Apodemus speciosus and Mogera wogura on islands in the inland sea
    Satoshi Kawaguchi
    2003 Volume 43 Issue 2 Pages 121-126
    Published: 2003
    Released on J-STAGE: June 04, 2008
    DOIhttps://doi.org/10.11238/mammalianscience.43.121
    JOURNAL FREE ACCESS
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    Trapping surveys of small mammals were made on 15 islands in the Inland Sea and on Shikoku from 11, October 2002 to April 2003. Apodemus speciosus was trapped on Yashirojima, Innoshima, Nakajima, Tajima, Yokosima and Shikoku Islands. Mogera wogura was trapped on Yashirojima Island and some mole tunnels were found on Nakajima I. A. speciosus was found in various habitats, but this species was not found in the orange orchards with bare ground surface.
    It was shown that in the Inland Sea A. speciosus was generally found on the islands whose areas are over 13km² and often found on the other smaller islands connected to some of the bigger islands, including Honshu and Shikoku, by artificial bridges. It is suggested that A. speciosus may have dispersed through the bridges.
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Appeal: The Mammalogical Society of Japan, Special Comitee on the Taxonomical names and Collections, Working Group on the Ordinal names
Series: Power of Morphology
Series: Methods and techniques for studying carnivores (Carnivora) in Japan
Reports of the MSJ Annual Meeting
Book Review
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