著者
Yokohata Yasushi Ikeda Yukio Yokota Masatsugu Ishizaki Hideharu
出版者
「野生生物と社会」学会
雑誌
Biosphere conservation : for nature, wildlife, and humans (ISSN:13446797)
巻号頁・発行日
vol.5, no.1, pp.39-46, 2003-03
被引用文献数
1

The ecosystem of Uotsuri-jima, one of the islands in the Senkaku Archipelago, off southwestern Japan, has probably been devastated by a dramatic increase in goats (Capra aegarus) since their deliberate introduction in 1978. Because the Senkaku Islands are claimed as national territory by China, Taiwan, and Japan, scientific researchers have been unable to land on Uotsuri-jima, nor have there been opportunities to eradicate the goats there. The effects of the goats on the vegetation of the island were assessed therefore using remote-sensing techniques : aerial photographs, Landsat satellite images, and an IKONOS satellite image. The results showed that bare patches have emerged in several areas, and that particular floral communities on the raised coral reefs may have already been lost. Since the flora of the sub-canopy layers are not visible beneath the dense forest canopy that covers most of the island, using current remote-sensing methods, very little is known about the extent of damage to the flora of these layers. Land-based surveys are thus urgently required to assess the condition of the flora and to control the introduced goats.
著者
松浦 友紀子 伊吾田 宏正 寺田 千里 鈴木 正嗣
出版者
「野生生物と社会」学会
雑誌
野生生物と社会 (ISSN:24240877)
巻号頁・発行日
vol.2, no.2, pp.1-8, 2015-07-01 (Released:2017-06-16)

We carefully evaluated hunting incidents to identify risk factors and develop preventive measures. We analyzed 1,471 cases that were reported to the Japanese Hunting Association as fraternal insurance between 2007 and 2011. Most hunters responsible for the incidents were in their sixties and were veterans. Although these cases were treated as "hunting" incidents, the number of incidents associated with firearms was low. Only 144 (9.8%) of all "hunting" incidents were related to firearms, and 18.6% of the cases resulted in death. The most frequent factor responsible for firearm-related incidents was improper handling of firearms. In cases where the victim was mistaken for game, at least 61.5% of the victims were wearing fluorescent orange clothing. It was clear that the main cause of firearm-related incidents was violation of basic hunting rules. Therefore, a new qualification system is required for hunters and managers so that they can demonstrate their understanding of basic hunting principles.
著者
小池 伸介 岩井 大輔 佐藤 伸彦 高野 徹
出版者
「野生生物と社会」学会
雑誌
野生生物保護 : Wildlife conservation Japan (ISSN:13418777)
巻号頁・発行日
vol.11, no.1, pp.31-41, 2007-09-10

We investigated the environmental conditions of Alnus japonica forests as Neozephyrus japonicus habitat along the Arakawa-River, Saitama Prefecture, in 2004 and 2005. N. japonicus was observed in 40 of the 87 forests (46.0%). We measured 11 microhabitat characteristics in each forest and compared them to determine the specific requirements of the butterfly. A. japonica forests inhabited by the butterfly were younger, and the total stem diameter and coverage of flowering plants in June and July were larger than those not inhibited. This suggests that younger trees are suitable for larval growth and that flower abundance in June and July is an important factor. Significant negative correlations were detected between average tree age and total stem diameter and coverage of flowering plants, suggesting that more flowering plants are found in younger forests. This also indicates that younger forests are more suitable for the butterfly. The younger A. japonica forest has more flowering plants than mature forest edges. To conserve and maintain butterfly habitat, we recommend that A. japonica trees be cut down periodically and allowed to regenerate. This approach can be expected to promote young A. japonica forests with many flowering plants, suitable for both the larvae and adults.
著者
三戸 幸久
出版者
「野生生物と社会」学会
雑誌
野生生物保護 (ISSN:13418777)
巻号頁・発行日
vol.1, no.3_4, pp.111-126, 1995 (Released:2017-09-06)
参考文献数
53
被引用文献数
1

From the mid-1800s to around 1950, the Japanese monkey (Macaca fuscata) was rarely seen by humans, because this animal had decreased greatly due to being harvested as a natural resource. After 1950, however, wild monkey parks were opened one after another, contributing to the local economy, nature-education of the general public, conservation of monkeys, reduction of crop damages and scientific studies. In 1972, there were 35 parks in total. But from thereon, the number of parks started to decrease again, which was caused by various problems, such as an increase in the running cost, decrease in the number of visitors and poor sanitary conditions. A steady rise in the number of wild monkeys also caused an increase in damages to crops and human dwellings. Important recommendations by naturalists, scientists and nature conservationists for improving the situation of the parks in regard to educational, scientific and nature conservation aspects have been ignored by commercial and administrative authorities. Nevertheless, efforts to improve the situation continued because of the overpopulation of park monkeys and the serious damages caused by them. As a possible solution to this problem it was suggested recently to return the animals to their natural habitat by gradually decreasing and then completely stopping their support, slowly integrating them into the ecosystem again, thereby contributing to public education and nature conservation in cooperation with local museums of natural history.
著者
三戸 幸久
出版者
「野生生物と社会」学会
雑誌
野生生物保護 (ISSN:13418777)
巻号頁・発行日
vol.1, no.3, pp.111-126, 1995
参考文献数
53
被引用文献数
1

From the mid-1800s to around 1950, the Japanese monkey (<i>Macaca fuscata</i>) was rarely seen by humans, because this animal had decreased greatly due to being harvested as a natural resource. After 1950, however, wild monkey parks were opened one after another, contributing to the local economy, nature-education of the general public, conservation of monkeys, reduction of crop damages and scientific studies. In 1972, there were 35 parks in total. But from thereon, the number of parks started to decrease again, which was caused by various problems, such as an increase in the running cost, decrease in the number of visitors and poor sanitary conditions. A steady rise in the number of wild monkeys also caused an increase in damages to crops and human dwellings. Important recommendations by naturalists, scientists and nature conservationists for improving the situation of the parks in regard to educational, scientific and nature conservation aspects have been ignored by commercial and administrative authorities. Nevertheless, efforts to improve the situation continued because of the overpopulation of park monkeys and the serious damages caused by them. As a possible solution to this problem it was suggested recently to return the animals to their natural habitat by gradually decreasing and then completely stopping their support, slowly integrating them into the ecosystem again, thereby contributing to public education and nature conservation in cooperation with local museums of natural history.
著者
伊藤 徹魯 藤田 明良 久保 金弥
出版者
「野生生物と社会」学会
雑誌
野生生物保護 : Wildlife conservation Japan (ISSN:13418777)
巻号頁・発行日
vol.6, no.2, pp.51-66, 2001-07-31

We studied nine marine mammal records from two old Korean texts, Chinese writting, Goshu-enjimon-chosen-sanko (Goshu's long, scattered manuscripts) and Chosen-Ocho-jitsuroku (A Korean True Account on the Monarchial Age). Four of the records were identified or assumed to be on the Japanese sea lion (Zalophus californianus japonicus) and five on larga seals (Phoca largha). The Japanese sea lion lived from the end of 17th c. to the beginning of the 19th c. and the larga seal from the 3rd c. B.C. to the end of 18th c. Two places where the sea lion are reported to have lived were Ullung-do in the Sea of Japan, and the estuary of the Tumangang in northeastern Korea, bordering on Russia. One place that the seal is reported to have lived was Kangnung located on the eastern coast of the Korean Peninsula. The other four places were somewhere around "the eastern waters", broad area containing the Bo Hai, Huang Hai and Sea of Japan. We confirmed that sea lions had had a breeding colony at Ullung-do at the end of 18th c., and estimate that their population size was substantial during three periods, the end of 17th and 18th c. and the beginning of 19th c.
著者
山田 芳樹 佐々木 功 佐々木 均 原内 裕
出版者
「野生生物と社会」学会
雑誌
野生生物保護 (ISSN:13418777)
巻号頁・発行日
vol.14, no.1-2, pp.1-8, 2013-07-01 (Released:2017-09-07)
参考文献数
25

We examined the escape rate and escape time of 4 carabid beetles, namely, Cychrus morawitzi, Carabus granulatus yezoensis, Damaster blaptoides rugipennis, and Leptocarabus arboreus ishikarinus, for 4 types of ditch blocks, namely, U-shaped ditch blocks, modified U-shaped ditch blocks with textured inner surfaces, Hydsel® type I ditch blocks, and Hydsel® type II ditch blocks. D. blaptoides rugipennis alone could escape from the U-shaped ditch blocks within the predetermined amount of time. Among the ditch blocks examined, the U-shaped ditch blocks were the most difficult to escape from, and the Hydsel®(types I and II) were the easiest to escape from. Although the escape rates for the modified U-shaped ditch blocks and the Hydsel® ditch blocks were the same, the beetles took more time to escape from the modified U-shaped ditch blocks than from the Hydsel® ditch blocks (types I and II).
著者
伊原 禎雄 宇根 有美 大沼 学 佐藤 洋司 新国 勇
出版者
「野生生物と社会」学会
雑誌
野生生物と社会 (ISSN:24240877)
巻号頁・発行日
vol.2, no.1, pp.37-41, 2014-12-01 (Released:2017-06-16)

We studied the circumstances and cause of a sudden mass mortality of frogs that occurred in May 2012 in Kurotanigawa, Tadami, Fukushima Prefecture. A total of 341 dead frogs of four species were observed: (Rhacophors arboreus, Rhacophors schlegelii, Rana nigromaculata, and Hyla japonica). Most of the dead individuals (91.8%) were forest green tree frog (Rhacophors arboreus). Based on pathological and molecular biological examination for pathogen, the primary cause of death appeared to be mammalian bites. We concluded that a mammalian predator caused this mass mortality by attacking. Automatic cameras provided evidence of raccoon dog (Nyctereutes procyonides), civet (Paguma larvata), and raccoon (Procyon lotor). The injuries to the frogs were consistent with reports of damage by raccoons. Raccoons may cause this mass mortality of frogs.
著者
櫻井 龍彦
出版者
「野生生物と社会」学会
雑誌
野生生物保護 (ISSN:13418777)
巻号頁・発行日
vol.4, no.2, pp.63-92, 1999-12-28 (Released:2017-10-06)
参考文献数
64

Many myths, legends and old folktales tell the story of the negotiation process between a human being and nature. By retelling the story through the perspective of development, we can see how human beings objectify the natural environment, and how they contextualize and relate to it. To assess these processes, this paper does the following : 1) analyzes these tales in relation to paddy field development, forest development, and urban development, 2) abstracts the Japanese view of nature and concept of the divine, 3) explains the power of the 'epistemological discourse' of folktales, 4) considers whether this power can be efficacious in dealing with today's urgent global problem of protecting the natural environment. 5) The problems included in Environmental Ethics such as 'Native Title', the issue of land ownership rights for aboriginal peoples, 'The Rights of Nature', awarding the right to existence for all natural things including inanimate objects, the concept of 'stewardship' which is found through a close reading of the Bible are considered from the perspective of the potential of folktales.