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野生生物保護 第6巻 第1号(要旨)

Wildlife Conservation Japan 6(1) :1−14,2001

南関東の10年後調査から見た在来2倍体種タンポポと外来種タンポポの出現状況変化
小川 潔1・本谷 勲2

  1. 東京学芸大学教育学部地球環境科学研究室 〒184-8501小金井市貫井北町4-1-1
  2. 〒194-0043町田市成瀬台3-18-9

Changes in the occurrence of native and introduced diploid dandelion species in the southern Kanto district during the past decade
Kiyoshi Ogawa 1 and Isao Mototani 2

  1. Laboratory of Natural History and Environmental Science, Faculty of Education, Tokyo Gakugei University, 4-1-1 Nukui-Kitamachi, Koganei, Tokyo, 184-8501 Japan
  2. 3-18-9 Narusedai, Machida, Tokyo 194-0043 Japan
Abstract

A follow-up survey of dandelion plants (Taraxacum) in 1990-1992, ten years after the initial survey using the same site designation methods in the southern Kanto district, revealed the following facts. Firstly, in the Tokyo urban area, the occurrence of both dandelion species had little changed; that is, the introduced one dominated there. Secondly, in the suburban areas, the number of lots in the recent survey where the native diploid species dominated had decreased compared with the previous survey, whereas the number of lots where the introduced species dominated had increased. Third, analysis of land-use in the two surveys revealed that a sharp decrease in cultivated fields, which are preferred by the native diploid species, caused a 48.7% drop in this dandelion痴 occurrence in the suburban areas. The count of the introduced dandelions also dropped by 3.5% in southern Tama, one suburb area. This species decreased in sites such as roadsides and vacant areas that have di inished, and increased on areas such as parking lots and children痴 playgrounds that have been expanded over the last ten years. These findings clarified the fact that decreases in habitat resulted in the retreat of ranges and declines in the frequency of occurrence for both dandelion species in the urban and suburban areas.
Key words: dandelion, follow-up survey, land-use, native and introduced plants, Taraxacum

Wildlife Conservation Japan 6(1) :15−24,2001

東京都日の出町,あきる野市におけるニホンテンの食性の季節的変化
中村俊彦・神崎伸夫・丸山直樹
東京農工大学農学部野生動物保護学研究室 〒183-8509 東京都府中市幸町3-5-8

Seasonal changes in food habits of Japanese martens in Hinode-cho and Akiruno-shi, Tokyo
Toshihiko Nakamura, Nobuo Kanzaki, and Naoki Maruyama
Wildlife Conservation, Department of Ecoregion Sciense, Faculty of Agriculture, Tokyo Noko University, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-8509, Japan

Abstract

Food habits of the Japanese marten (Martes melampus) were studied by scat analysis, and 11 questionnaires send to camp-site managers in Hinode-cho and Akiruno-shi, 50 km west of Tokyo Metropolitan district, between October 1997 and November 1998. In this area martens mainly ate fruits, insects and small mammals but not human food remains. A similar trend was found when 4 other studies in Kisokomagatake, Nikko, and Tsushima were compared with this data by using cluster analysis.
Key words: Japanese marten, food habit, Tokyo suburb

Wildlife Conservation Japan 6(1) :25−32,2001

山梨県における狩猟の現状とその問題点
原田正子1・神崎伸夫1・丸山直樹1・今木洋大2

  1. 東京農工大学農学部野生動物保護学研究室 〒183-8509東京都府中市幸町3-5-8
  2. 山梨県環境科学研究所動物生態学研究室 〒403-0005山梨県富士吉田市上吉田字剣丸尾5597-1

The present condition and problems of game hunting in Yamanashi Prefecture, central Japan
Masako Harada1, Nobuo Kanzaki1, Naoki Maruyama1, and Hiroo Imaki2

  1. Department of Ecoregion Science, Faculty of Agriculture, Tokyo Noko University, Saiwaicho 3-5-8, Fuchu, Tokyo 183-8509, Japan
  2. Yamanashi Institute of Environmental Sciences, Kamiyoshida Turugimaruo 5597-1, Fujiyoshida, Yamanashi 403-0005, Japan
Abstract

A questionnaire was conducted to analyze hunters・attitudes toward the hunting condition, hunting regulation and wildlife in Yamanashi Prefecture. There were 327 respondents, and the response rate was 59.5%. Wild boar (Sus scrofa) was the most popular game species, and nuisance animals tended to be selected. The average age of respondents was 56.1ア9.6(SD), and hunters older than 50 years of age made up over fifty percent. The annual number of days spent hunting tended to decrease, and that main reason was 澱usy with other activity・ The shortage of hunters was the main problem of the present nuisance control system. But neither the hunting association nor the administrative agencies have actively tried to recruit new hunters.
Key words: attitude, hunting, nuisance control, game management, Yamanashi Prefecture

Wildlife Conservation Japan 6(1) :33−39,2001

宮城県北上町十三浜沿岸の海藻
中田恵英・吾妻行雄・谷口和也
東北大学大学院農学研究科 〒981-8555 宮城県仙台市青葉区堤通雨宮町1番1号

Marine algal flora off the coast of Jusan-Hama at Kitakami in Miyagi Prefecture, Japan
Yoshihide Nakata, Yukio Agatsuma, and Kazuya Taniguchi
Graduate School of Agricultural Science, Tohoku University Tsutsumi-dori Amamiya 1-1, Aoba, Sendai, Miyagi 981-8555

Abstract

Marine algal flora off the coast of Jusan-Hama in Kitakami, Miyagi Prefecture was studied from April 1998 to February 1999. 102 species of marine algae were listed, 13 of which belong to Chlorophyta, 28 to Phaeophyta, 61 to Rhodophyta, and one species of sea grass. Over ten species of the small annual algae matured throughout the year. The small perennial algae mainly matured from autumn to winter. Among the large perennial brown algae, those are Hizikia fusiformis, Sargassum micracanthum, S. siliquastrum, S. thunbergii, and S. yezoense of Fucales, and Arame kelp (Eisenia bicyclis) of Laminariales, matured in summer and autumn-winter, respectively.
Key words: marine algae, marine flora, maturation, succession

Wildlife Conservation Japan 6(1) :41−46,2001

福島県いわき市下神白沿岸の海藻
佐藤太津真1・中田恵英2・吾妻行雄2・谷口和也2

  1. 福島県水産試験場 〒970-0316福島県いわき市小名浜下神白字松下13-2
  2. 東北大学大学院農学研究科 〒981-8555宮城県仙台市青葉区堤通雨宮町1-1

Marine algal flora off the coast of Shimo-Kajiro in Iwaki City, Japan
Tatsuma Sato1, Yoshihide Nakata2, Yukio Agatsuma2, and Kazuya Taniguchi2

  1. Fukushima Prefecture Fisheries Experimental Station 13-2 Matsushita Onahama, Iwaki, Fukushima, 970-0316, Japan
  2. Graduate School of Agricultural Science, Tohoku University 1-1 Tsutsumi-dori Amamiya, Aoba, Sendai, Miyagi, 981-8555, Japan
Abstract

Marine algal flora off the coast of Shimo-Kajiro in Iwaki city was studied during the period from November 1998 through October 1999. A total of 84 species of marine algae were listed, 7 of which belong to Chloropyta, 19 to Phaeophyta and 57 to Rhodophyta, and one speice of sea grass. The small annual algae matured throughout the year. Many small and large perennial algae matured from summer to autumn. Summer is considered to be the most suitable season for construction of artificial reef afforestation.
Key words: marine algae, marine flora, maturation, succession

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