著者

鳥居 春己 高野 彩子 村上 興正 白子 智康

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.10, pp.43-50, 2022 (Released:2022-10-25)

参考文献数

35

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The stomach contents of six adult female nutrias captured in June 2021 were analyzed using DNA metabarcoding to confirm foraging of Unionoid mussel and other invertebrate animal taxa in the Shirokita cove in the lower reaches of the Yodogawa River, Osaka prefecture. Nodularia douglasiae, N. nipponensis, Sinanodonta calipygos, S. sp., Beringiana japonica, Corbicula fluminea or C.leana. were detected in three nutrias. In particular, N. douglasiae was the dominant on the number of read. Ladybug beetles Propylea japonica or P. quatuordecimpunctata and whitefly (Aleurochiton sp.) were also observed, but these are thought to have been taken in along with plants. N. nipponensis has not been found in the Yodogawa river system, and Corbicula spp. have not been found in the midden of dead shell caused by nutria feeding, which was previously reported. This is the first record of the nutria preying on N. nipponensis, S. calipygos, B. fukuharai, but Lanceolaria oxyrhyncha which was previously reported was not detected. These results indicate that DNA metabarcoding is available for further analysis to clarify the nutria feeding habit including aquatic and terrestrial plants and impact on the ecosystems.

著者

上杉 哲雄 丸山 直樹 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.3, no.2, pp.85-94, 1998-03-01 (Released:2017-10-03)

参考文献数

30

被引用文献数

1

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Japanese weasels (Mustela itati itati) were introduced into Miyake-jima Island, Tokyo, to reduce the number of brown rats (Rattus norvegicus) and black rats (R. rattus). They currently threaten the endemic component of this island's fauna. Public attitude toward nature, introduced Japanese weasels and the future of the island were studied using a questionnaire survey. One hundred eighty seven families were nominated for the survey, of which 80 individuals responded (2% of all residents). Eighty six percent of the respondents were interested in nature, and 56% thought it important to protect nature or develop industries that integrate nature conservation practices into their activities. Ninety five percent of the respondents recognized that Japanese weasels had been introduced and 94% knew the purpose of that introduction. A significantly greater number of respondents agreed that control after Japanese weasel on Miyke-jima Island was necessary than those who disagreed (X2-test, p < 0.001).

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.4, no.2, pp.69-70, 1998-12-17 (Released:2017-07-22)

著者

細谷 忠嗣

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.25, no.1, pp.20-22, 2020 (Released:2022-04-28)

著者

小池 伸介 羽澄 俊裕 古林 賢恒

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.8, no.1, pp.19-30, 2003

参考文献数

44

被引用文献数

9

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The authors studied the likelihood that seeds were being dispersed by the Japanese black bear (<i>Ursus thibetanus japonicus</i>) in a deciduous forest near Ashikawa Village, Yamanashi Prefecture. The forest was composed of 113 tree species. Japanese black bear ate fruits and seeds belonging to 37 species (including 7 unidentified). About 86.7 to 99.7% of seeds identified in 360 samples of bear feces were in good condition for 17 species (10 drupes, 5 berries, 1 multiple fruit of droplets and 1 pome). However, no intact seeds were found for 5 nut species. The germination rate of Yamasakura (<i>Prunus jamasakura</i>) seeds taken from feces was the same as for uneaten seeds. The results of this investigation suggest a high likelihood of seed dispersal by the Japanese black bear.

著者

満尾 世志人 西田 一也 千賀 裕太郎

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.1-9, 2010-03-01 (Released:2017-09-20)

参考文献数

28

被引用文献数

1

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To evaluate how Lefua echigonia use paddy fields, we studied the so-called "yatsuda" paddy fields in Tokyo from April through November of 2006. The investigation consisted of trapping fish that migrate between the paddy fields and the irrigation channel, followed by a distributional survey at the channel. In the analysis, we compared the results of each item assessed for Lefua echigonia with those for Misgurnus anguillicaudatus and found that while both L. echigonia and M. anguillicaudatus bred in the paddy fields, the main breeding site for L. echigonia was apparently the channel. These results along with the observation that many juvenile L. echigonia enter the paddy fields suggest that the paddy fields function mainly as the growth place for L. echigonia. It was also found that L. echigonia tended to exit the paddy fields at the point of water entry.

著者

角田 裕志 土井 真樹絵 大平 充 満尾 世志人 千賀 裕太郎

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.13, no.2, pp.59-66, 2012

参考文献数

26

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We investigated fish fauna in the littoral areas of Lake Saiko and Shojiko, Yamanashi Prefecture, Central Japan and compared them with those in previous studies. Two species have newly appeared in each lake: <i>Oncorhynchus masou masou</i> (Salmonidae) and <i>Pseudogobio esocinus esocinus</i> (Cyprinidae) in Lake Saiko and two Gobiidae species, <i>Tridentiger brevispinis</i> and <i>Gymnogobius urotaenia</i>, in Lake Shojiko. Three of these fishes are non-indigenous Japanese fishes and may have been introduced unintentionally in recent years, whereas <i>O. masou masou</i> was stocked for fishing by fishery managers of Lake Saiko. In Lake Saiko, the fish species composition has greatly changed and a goby, <i>Rhinogobius</i> sp. OR, has been dominated by another goby, <i>T. brevispinis</i>, during the past decade. In Lake Shojiko, species composition and dominant species has not changed and a goby, <i>R.</i> sp. OR, was the dominant benthic fish in littoral areas. However, we found that <i>T. brevispinis</i> has also invaded Lake Shojiko recently and greatly increased in number during the study period. The results indicated that unintentional introduction of non-indigenous fish species may have frequently occurred with fish stocking in recent years.

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

参考文献数

9

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To analyze the status of wild boar (<i>Sus scrofa</i>), 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

曽我 昌史 今井 葉子 土屋 一彬

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.20, no.2, pp.24-27, 2016-02-15 (Released:2017-11-03)

被引用文献数

1

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.3, no.1, pp.73-83, 1997

著者

三谷 奈保 諸澤 崇裕 山下 亮 喜岡 正吏 後藤 義仁 橋本 琢磨 北浦 賢次 山田 文雄 阿部 愼太郎 石川 拓哉

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.11-22, 2014-12-01 (Released:2017-06-16)

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The density of invasive alien mongooses on Amami-oshima Island has recently been controlled to a low level by trapping. Aiming for eradication, three dogs were specially trained to detect the location of the animals to improve the efficiency of trapping. The detection efficiency of the dogs was higher than the efficiency of sensor cameras and pipe-type kill traps in each area, which had different mongoose densities. It was also significantly higher in high density areas (p<0.05) and higher than those methods plus hair traps in lower density areas. Dogs could also contribute to capture by handlers. The capture rates of the dog handlers were lower than those of the pipe traps in higher densities areas. However, a mongoose was caught by a dog handler in an area where none had been caught in the past five years. It was revealed that detection dogs are a sensitive means that have the potential for capture by the handler. While it takes a few years to train a detection dog. The area that one pair of a detection dog and a handler could scan thoroughly in a year was estimated at 16-28 km^2. The utilization of detection dogs preferentially in extremely low density areas is considered to be efficient.

著者

寺尾 愛也 日野 貴文 吉田 剛司

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.1-10, 2014-12-01 (Released:2017-06-16)

被引用文献数

2

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The increasing number of deer-vehicle collisions (DVCs) has had a significant impact on public safety. Scientific countermeasures require the systematization of DVC data. In Japan, however, DVC countermeasures are still insufficient due to the lack of DVC data systematization. The objective of this study was to review the progressive approach used for DVC data systematization in Germany, North America (Canada and the USA.), Sweden, and the United Kingdom. Additionally, we describe the prospect of DVC data systematization in order to develop scientific countermeasures in Japan.

著者

正富 宏之

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.7, no.2, pp.31-42, 2001-09-30 (Released:2017-09-05)

被引用文献数

1

著者

助野 実樹郎 宮木 雅美

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.11, no.1, pp.43-66, 2007

参考文献数

36

被引用文献数

5

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We surveyed the vascular flora on the Nakanoshima Islands in Toya Lake, Hokkaido, Japan, during the years 2002-2004. Here, the impacts of an excessive population of sika deer (<i>Cervus nippon</i> Temminck) have lasted for more than 20 years. The present survey found 150 plant species in 68 families on the islands (excluding the species recorded only in the areas impossible for the deer to enter), a decrease to 32.6% of the 460 species surveyed in 1977. The survival ratios of herbaceous, shrub and tree species were 18.8% (n = 67), 35.0% (n = 14), and 62.5% (n = 40), respectively. The survival ratios of herbaceous and shrub species were lower than for tree species. These results suggest that shrub and herbaceous species, which utilize the same space as deer, were more affected by the deer compared to the tree species. Numbers of alien plants did not change since the first survey, and the failure to increase was probably because of heavy foraging pressure. In recent years, deer have started foraging on unpalatable plants such as <i>Cephalotaxus harringtonia</i> var. <i>nana</i> and <i>Senecio cannabifolius</i>. The current findings suggest that the flora on the island change rapidly in response to pressure from browsing deer.

著者

鈴木 克哉

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.2, pp.29-34, 2014-05-01 (Released:2017-06-16)

被引用文献数

2

著者

鈴木 正嗣

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.17, no.1, pp.26-27, 2012-07-31

著者

Huygens Oscar C. Hayashi Hidetake

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.3, no.2, pp.115-129, 2001-07

被引用文献数

2

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The government of Nagano Prefecture, central Japan, financed research in 1992 and 1993 to document Asiatic black bear (Ursus thibetanus) ecology, density, and population parameters throughout the prefecture. The prefectural government published the methods and results of this research in 1994, followed by an Asiatic black bear management proposal in 1995. However, most of the research methods used were not adapted to the credible documentation of bear ecology, density, and population parameters. Consequently, most of the results obtained and the management proposal are of dubious value. In Nagano Prefecture, municipal governments are entrusted with the management of the bears within their jurisdictions, limiting input from the prefectural government. Nevertheless, the Nagano prefectural government should not finance flawed bear research nor propose a bear management plan based on such research. A responsible bear management plan should be based on scientifically obtained data. We use existing literature to point out flaws in the research methodology used in the prefecture and to suggest alternative methods. We wish this commentary to be constructive and hope it will encourage sounder bear research in the prefecture and throughout Japan in the future.

著者

Huygens Oscar C. Goto Mitsuaki Hoshino Toshio Koyama Masaru Tokita Eiji Hayashi Hidetake Yoshida Toshio

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.4, no.1, pp.37-41, 2001-12

被引用文献数

2

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Regular monitoring of bear (Ursus spp.) populations is important to ensure that conservation policies are appropriate. Although population estimates may be less ambiguous than population trend estimates, they are more difficult and expensive to obtain. Bait station surveys are commonly used in North America to monitor bear population trends. We tested sardine bait stations as a monitoring tool for Asiatic black bear (U. thibetanus) populations in Nagano Prefecture, central Japan, in summer and fall 1999 and in spring 2000. We established 341 sardine bait stations in five study areas. Eighteen (X^^-=5.45%; range=0-10.8%) bait stations were visited by bears and 21 (X^^-=6.36%; range=0-17.8%) were visited by non-target animals, and 11 were discarded due to data collection concerns. In the only area we tested during three seasons (Northern Japanese Alps), we obtained the highest (8.3%) visitation rates in summer, the lowest (4.5%) in spring, and intermediate rates (5.6%) in fall. These visitation rates are too low to be a reliable indicator of bear abundance.

著者

土屋 俊幸

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.5, no.4, pp.104, 2000-08-28 (Released:2017-09-05)

著者

浅川 満彦 ブラジル マークA. 千葉 晃

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.9, no.1, pp.1-8, 2004-10-01