著者

中西 喜栄 ADULYANUKOSOL Kanjana 荒井 修亮 細谷 誠一 中西 佳子 小谷 和彦 勝越 清紀

雑誌

Journal of Advanced Marine Science and Technology Society = 海洋理工学会誌 (ISSN:13412752)

巻号頁・発行日

vol.14, no.2, pp.1-8, 2009-05-07

参考文献数

28

著者

荒井 修亮

出版者

農林水産技術情報協会

雑誌

農林水産技術研究ジャーナル (ISSN:03879240)

巻号頁・発行日

vol.32, no.8, pp.42-45, 2009-08-01

参考文献数

5

著者

新家 富雄 江本 博俊 今津 安成 清水 浩 服部 真人

出版者

海洋理工学会

雑誌

Journal of Advanced Marine Science and Technology Society = 海洋理工学会誌 (ISSN:13412752)

巻号頁・発行日

vol.15, no.1, pp.47-54, 2009-11-07

参考文献数

10

被引用文献数

1

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Passive acoustic biotelemetry for Dugong dugon enabled us to monitor the presence and the position of dugongs by receiving their calls using underwater sound techniques. The principle of the acoustic biotelemetry is to identify the sound source directions of their calls calculated from the time arrival differences between plural hydrophones. This method requires stereo automatic underwater sound monitoring systems. From 2003 to present, we have been developing the stereo underwater recording system. AUSOMS-D (Automatic Underwater Sound Monitoring System for Dugong). AUSOMS-D records underwater sound of frequency band between 20 Hz to 20 kHz by stereo (2ch) hydrophones at sampling frequency of 44.1 kHz with 16 bits resolution for many days. Progresses of AUSOMS-D have been made such as down sizing of the pressure resistant housing, longer recording time and additional scheduling functions. The latest AUSOMS-D is 7 kg in the air weight. It can record up to 15 days continuously with 16 alkaline D cells. AUSOMS-Dwas applied for the survey of dugong in Thailand's water many times.On the other hand, we have developed a stereo towed hydrophone system. The system is called "Towed Aquafeeler". Towed Aquafeeler can receive underwater sound of frequency band between 100 Hz to 20 kHz by 2ch. Recommended tow speed of the system in listing mode is 6 knots or less. Towed Aquafeeler is 11 kg in the air and neutral buoyancy in the water. It was also used for the dugong surveys in Thailand water twice.

著者

市川 光太郎 荒井 修亮 赤松 友成 新家 富雄 ADULYANUKOSOL Kanjana

出版者

海洋理工学会

雑誌

Journal of Advanced Marine Science and Technology Society = 海洋理工学会誌 (ISSN:13412752)

巻号頁・発行日

vol.15, no.1, pp.63-66, 2009-11-07

参考文献数

8

著者

笠原 勉 原 宏江

出版者

海洋理工学会

雑誌

Journal of Advanced Marine Science and Technology Society = 海洋理工学会誌 (ISSN:13412752)

巻号頁・発行日

vol.15, no.1, pp.67-72, 2009-11-07

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The Fishery Agency conducted the investigations and researches on the restoration of tropical sea grass beds, which serves as feeding sites for dugongs. from FY 2001 to FY 2008. as a part of its project aiming at the coexistence of dugongs and the fishery. In addition to the results of the project, such as seedling production and transplanting techniques, the existing knowledge and information on the sea grass beds were collected and complied in a booklet. The former part of the booklet " A review for the restoration of tropical sea grass beds" summarizes existing knowledge and information on 1) the component species, functions and roles. 2) habitats and environmental conditions. 3) the distribution area and standing stock and 4) dugongs' biology and the relationship with tropical sea grass beds, while the latter part explains 1) restoration techniques of sea grass beds using hand grass planting. 2) seedling production techniques using Thalassia hemprichii, 3) transplanting techniques of artificially produced Thalassia hemprichii and 4) monitoring of created or restored tropical sea grass beds.

著者

向井 宏

出版者

海洋理工学会

雑誌

Journal of Advanced Marine Science and Technology Society = 海洋理工学会誌 (ISSN:13412752)

巻号頁・発行日

vol.15, no.1, pp.73-87, 2009-11-07

参考文献数

10

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Knowledge of feeding ecology which have been studied on reared and wild dugong are described. So far. 15-20 kg (wet wt)/day has been reported as feeding rate of a dugong in Toba aquarium. And, two estimations of feeding rate on wild dugong by author are introduced. Feeding rate of dugong on Halophila ovalis was estimated based on observation of dugong behavior and feeding trails in Khao Bae Na sesagrass bed. Trang, Thailand, and on long term observation of dugong behavior in New Argao seagrass bed. Davao Gulf. Mindanao. Philippines. From these results, it was discussed the possibility that the knowledge of feeding rates have been published was overestimation. Because the estimation have been published was based upon short-term observation. The feeding rate considerably varied seasonally and monthly. Feeding rate per day obviously fluctuated with lunar cycle. Also the rate increased in dry season and decreased in wet season.

著者

海勢頭 豊

出版者

藤原書店

雑誌

環

巻号頁・発行日

vol.43, pp.212-216, 2010

著者

籠橋 隆明

出版者

社会民主党全国連合機関紙宣伝委員会

雑誌

社会民主 (ISSN:13420615)

巻号頁・発行日

no.656, pp.11-16, 2010-01

著者

新家 富雄 江本 博俊 今津 安成

出版者

海洋音響学会

雑誌

海洋音響学会誌 (ISSN:09165835)

巻号頁・発行日

vol.37, no.2, pp.117-121, 2010-04

著者

天本 奈々子 市川 光太郎 荒井 修亮 赤松 友成 新家 富雄 ADULYANUKOSOL Kanjana

雑誌

Journal of Advanced Marine Science and Technology Society = 海洋理工学会誌 (ISSN:13412752)

巻号頁・発行日

vol.15, no.2, pp.149-157, 2010-04-12

参考文献数

38

著者

藤野 光太郎

出版者

プレジデント社

雑誌

プレジデント (ISSN:00327751)

巻号頁・発行日

vol.48, no.19, pp.27-29, 2010-07-19

著者

当山 昌直

出版者

沖縄県教育委員会

雑誌

史料編集室紀要 (ISSN:09144137)

巻号頁・発行日

no.34, pp.1-10, 2011-02

著者

松本 博之 Matsumoto Hiroyuki マツモト ヒロユキ

出版者

人間文化研究機構国立民族学博物館

雑誌

国立民族学博物館調査報告 (ISSN:13406787)

巻号頁・発行日

no.97, pp.169-193, 2011-03-01

著者

濱口 寿夫

出版者

沖縄県立博物館・美術館

雑誌

沖縄県立博物館・美術館博物館紀要 (ISSN:18831591)

巻号頁・発行日

no.5, pp.11-18, 2012

著者

蜷川 義章

出版者

環境技術学会

雑誌

環境技術 = Environmental conservation engineering (ISSN:03889459)

巻号頁・発行日

vol.41, no.5, pp.297-302, 2012-05-20

参考文献数

1

著者

松尾 侑紀 市川 光太郎 溝端 紀子 荒井 修亮

出版者

海洋理工学会

雑誌

海洋理工学会誌 (ISSN:13412752)

巻号頁・発行日

vol.19, no.1, pp.1-4, 2013

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We examined relationship between vocal behavior of dugongs (<i>Dugong dugon</i>) and (1) time of day and (2) tide around Talibong Island, using passive acoustical observation. Also, we compared the results of several data and investigate whether the same behavior can be observed over different time of year. We used underwater sound data recorded in February and March 2004, November 2006 and January 2008 off southeast of Talibong Island and analyzed the number of calls detected in unit time in relation to time and tide. We also compared the result of the analysis among three months and investigated whether there was any difference. In terms of the effects of time, more calls were detected in nighttime than in daytime (p<0.05). In terms of the effects of tide, there were significant correlation between maximum tidal range and many calls were detected when tidal range was narrow. Our findings suggest that vocalization pattern of the dugongs is influenced by such external factors as time and tidal range.

著者

大林 啓吾

出版者

日本法政学会

雑誌

法政論叢 (ISSN:03865266)

巻号頁・発行日

vol.51, no.1, 2014

著者

大泰司 紀之 太子(石船) 夕佳

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.1, pp.16-18, 2015

著者

宋唐愼微撰

出版者

楊先春刊 (歸仁齋)

巻号頁・発行日

vol.[6], 1579

著者

青野 誠次

出版者

福音館書店

雑誌

子どものしあわせ : 母と教師を結ぶ雑誌 (ISSN:21881189)

巻号頁・発行日

no.772, pp.8-12, 2015-06