著者
山田 晋也 大竹 正剛 大場 孝裕 山口 亮 大橋 正孝
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.1, no.1, pp.1-5, 2013-12-20 (Released:2017-06-16)

We evaluated the stress in deer that were captured using corrals, foot snare traps, grand hunt, and sharp shooting by determining the cortisol and creatine kinase levels. The means of the cortisol levels were 2.5±1.3μg/dL, 11.3±5.3μg/dL, 2.1±2.5μg/dL, and 0.4±0.1μg/dL for deer captured using corrals, foot snare traps, grand hunt, and sharp shooting, respectively. The means of the creatine kinase levels for deer captured using corrals, foot snare traps, grand hunt, and sharp shooting were 93.5±129.1×10^3U/L, 253.6±303.3×10^3U/L, 46.6±70.1×10^3U/L, and 2.6±2.0×10^3U/L, respectively. The means of the cortisol levels of the deer captured using corral, grand hunt, and sharp shooting were significantly lower than that of the deer captured using foot snare traps (p<0.01). The mean of the creatine kinase levels of deer captured using corrals was significantly higher than that of the deer captured using sharp shooting (p<0.01), but was equal to that of the deer captured using foot snare traps and grand hunt.
著者
横畑 泰志 横田 昌嗣
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.5, no.1, pp.1-12, 2000-07-19

Uotsuri-jima Island in the Senkaku Islands, southwestern Japan is a small island characterized by very valuable biota with high endemicity which has formed over a long period of isolation. The ecosystem on this island is under the risk of total destruction because of the presence of domestic goats, Capra aegarus, were introduced in 1978 by a private political party in Japan and increased to more than 300 individuals. This problem is made more difficult due to the territorial conflicts over the Islands by Japan, China and Taiwan.
著者
橋本 啓史 須川 恒 西野 麻知子 石川 俊之
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.15-29, 2013-07-01 (Released:2017-09-07)
参考文献数
40

We studied the impacts of human disturbances by boats on wintering waterbirds at 2 sites, in the North and South of Lake Biwa, a Ramsar wetland in Shiga Prefecture, Japan. Most land-feeding ducks (Anas platyrhynchos, An. poecilorhyncha, An. crecca, and An. formosd) slept offshore during the daytime. Herbivorous ducks (An. penelope, An. strepera, and An, falcata) foraged on the water surface. Diving herbivorous waterbirds (Fulica atra) foraged by diving offshore in the North, and by surface-feeding over a wide area of the water surface in the South. Most diving ducks (Ayihya ferina, Ay. fuligula, Ay. marila, and Bucephala clangula) slept on the water surface near the shoreline during the daytime, and some individuals started diving to forage in the afternoon. At both sites, waterbirds were often disturbed by fishing boats. Some birds flew away from the disturbance, but the species foraging in the daytime tended to come back to the same area and resume foraging promptly, whereas the species sleeping in the daytime tended not to come back.
著者
森光 由樹
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.3, no.1, pp.35-40, 2015-11-01 (Released:2017-06-16)

Conflicts between wild animals and humans have been increasing during the recent years, resulting in damage to human environments and infrastructure as well as injuries to humans. In urban areas, capturing the wild animals is a difficult task because, by law, firearms cannot be used. As a method for rapidly incapacitating and capturing these animals, it has become legal to use tranquilizer guns, as they are non-lethal, and there is little danger of damage to the property. Capturing via tranquilizer gun is a safe method; however, operational problems remain. Because tranquilizer guns are drug delivery systems and not firearms, written tests and practical exams for the use of tranquilizer guns are not imposed. A person who does not have basic firearm training can still use the guns, as long as he/she passes police inspection. Because there are various problems in the positioning and operation of tranquilizer guns in the amended law, there is an immediate need to create user manuals and to formulate rules to prevent accidents.
著者
小寺 祐二 神崎 伸夫
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.6, no.2, pp.67-78, 2001-07-31 (Released:2017-10-17)
参考文献数
9

To analyze the status of wild boar (Sus scrofa), crossbred of pig×wild boar farming, and those feral populations, a written questionnaire was sent to 47 prefectural government offices, 679 branches of Dainippon Ryoyukai (Hunters Club) and 42 farmers. A verbal survey was also conducted on farmers in Gunma, Wakayama, Hokkaido, and Aomori prefectures. Breeding farms of wild boar and crossbreeds existed in 30 (63.8%) and 22 (46.8%) prefectures, respectively. The number of farms trippled between 1955 and 1964. It was the highest in the 1980s and the most popular motivation was to attract tourists. Feral crossbreds have been discovered in 36 prefectures (76.6%). The sources of feral animals were mostly unknown (69.8%). However, 0.9% of feral animals were reported to have been released intentionally. Almost half of the hunters (43.3%) surveyed responded to a question concerning their opinion of feral animals and they agreed to eliminate the animals. 23.0% welcomed them as hunting resources. Breeding was regarded as an industry that reinvigorated the local economy in Wakayama and Gunma prefectures. Delay of counter measures caused the feral crossbreed population to survive in Hokkaido.
著者
中沢 智恵子
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.12, no.2, pp.19-38, 2010-03-01 (Released:2017-09-20)
参考文献数
41

The causes of the extinction of the Japanese wolf (Canis lupus hodophilax), once found in three-Honshu, Shikoku, and Kyushu-of the four Japanese large islands, were documented by surveying official documents of northeastern Honshu from the Meiji era (1868-1912). The results showed many instances of nuisance killings of the animals, motivated by attacks on free-ranging livestock by the animals. The extirpation policies and their implemental measures were planned and authorized by the prefectural administrations of Aomori, Iwate, Iwai (then occupying parts of both present-day Iwate and Miyagi Prefectures), and Miyagi. In Aomori Prefecture, the police killed wolves. In Iwai Prefecture, the police commanded hunters to conduct the nuisance killings. The government of Iwate Prefecture enacted a bounty system in 1875, and 201 wolves were killed in 6 years. The government of Miyagi Prefecture followed it in 1877. In Fukushima Prefecture, local people conducted nuisance killings. Besides, the documents showed that fur, meat, and other parts of wolves were traded and used in northeastern Honshu. Thus, it can be concluded that the nuisance killings and hunting of wolves in the late 19th century contributed to the extinction of these animals in northeastern Honshu.
著者
和田 一雄
出版者
「野生生物と社会」学会
雑誌
ワイルドライフ・フォーラム (ISSN:13418785)
巻号頁・発行日
vol.6, no.2, pp.67-73, 2000-12-22
被引用文献数
1
著者
小川 潔 本谷 勲
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.1, pp.1-14, 2001-02-28
被引用文献数
2

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's 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 diminished, and increased on areas such as parking lots and children's 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.