Research Institute for Humanity and Nature

Staff Profile

NameICHIKAWA Kotaro
AffiliationResearch Institute for Humanity and Nature
PositionProject Researcher
Arrival day2010年10月1日
Leaving the office day 
Year of Birth1978
Academic CareerFaculty of Agriculture, Kyoto University(B.S. 1999-2003)
Biosphere Informatics, Graduate School of Informatics, Kyoto University(M.S. 2003-2005)
Biosphere Informatics, Graduate School of Informatics, Kyoto University(Ph. D. 2005-2007)
Professional Career2005.4-2007.9. Research fellow of the Japan Society for the Promotion of Science (DC1)
2007.10.-2008.3 Research fellow of the Japan Society for the Promotion of Science (PD)
2008.4-2010.9 Research fellow of the Japan Society for the Promotion of Science (PD)
2010.10- Project researcher at Research Institute for Humanity and Nature
Higher DegreesBachelor of Agriculture (Kyoto University, 2003)
Master of Informatics (Kyoto University, 2005)
Doctor of Philosophy of Informatics (Kyoto University, 2007)
Fields of SpecializationBioacoustics
Academic Society MembershipsJapanese Society of Fisheries Science
Acouctical Society of America
Advanced Marined Science and Technology
Japanese Society of Biologging Science
Awards1. TOP 10 ARTICLES PUBLISHED IN THE SAME DOMAIN SINCE YOUR PUBLICATION (2010), BioMedLib, Ichikawa K, Akamatsu T, Shinke T, Sasamori K, Miyauchi Y, Abe Y, Adulyanukosol K, Arai N: Detection probability of vocalizing dugongs during playback of conspecific calls. J Acoust Soc Am; 2009 Oct;126(4):1954-9, September 10, 2010.
2. 海洋理工学会平成19年度業績賞 (2008), 海洋理工学会, 5月16日(京都大学情報学研究科バイオテレメトリーチームの一員として受賞)
3. Poster award (2004): Kotaro Ichikawa, Tomonari Akamatsu, Tomio Shinke, Nobuaki Arai, Chika Tsutsumi & Kanjana Adulyanukosol, Acoustical monitoring of dugong, OCEANS’04/TECHNO-OCEAN, November 10-12, 2004
AppealI have been studying dugong acoustics mainly in Thailand and Australia. My research interest is to reveal "when", "where" and "what" about the dugongs. All the research acitivities are in the aim of peaceful co-existence of the dugong protection and the coastal fisheries. I will be working on finding effective conservation measures for the dugongs in Arab human subsistenfe ecosystems under the RIHN project, "A Study of Human Subsistence Ecosystems in Arab Societies: To Combat Livelihood Degradation for the Post-Oil Era (PL: Dr. Hiroshi Nawata)".
Home Pagehttp://bg66.soc.i.kyoto-u.ac.jp/ichikawa/kotaro/HP.htm

 

Books

【Chapters/Sections】

ICHIKAWA, Kotaro 2013 Notes on the aerial surveys. Hiroshi NAWATA (ed.) Dryland Mangroves. Arab Subsistence Monograph Series, 2. Shoukadoh Book Sellers, Kamigyo-ku, Kyoto, pp.31.

Papers

【Original Articles】

Kotaro Ichikawa, Tomonari Akamatsu, Tomio Shinke, Nobuaki Arai and Kanjana Adulyanukosol 2012,11 Clumped distribution of vocalising dugongs (Dugong dugon) monitored by passive acoustic and visual observations in Thai waters. Proceedings of Acoustics 2012-Fremantle:130-133. (reviewed).

Ichikawa, K., Akamatsu, T., Arai, N., Shinke, T., and Adulyanukosol, K. 2011,06 Callback response of dugongs to conspecific chirp playbacks. Journal of Acoustical Society of America 129(6):3623-3629. (reviewed).

Noriko Ando-Mizobata, Kotaro Ichikawa, Nobuaki Arai, Hidehiro Kato 2011,03 Dugong vocalization in relation to ambient noise. Proceedings of the 6th International Symposium on SEASTAR2000 and Asian Bio-logging Science (The 10th SEASTAR2000 workshop),: 55-59. (reviewed).

Kotaro Ichikawa, Tomonari Akamatsu, Nobuaki Arai, Tomio Shinke, Kanjana Adulyanukosl 2010,02 Spatial distribution of dugongs by acoustic and visual observation in Thailand. Proceedings of the 5th international Symposium on SEASTAR2000 and Asian Bio-logging Science:39-42. (reviewed).  http://hdl.handle.net/2433/107338

Nanako Amamoto, Kotaro Ichikawa, Nobuaki Arai, Tomonari Akamtatsu, Tomio Shinke, and Kanjana Adulyanukosol 2009 The depth of water effects the feeding ground selection by dugongs in dry season. Journal of Advanced Marined Science and Technology 15(2):149-157. (reviewed).

Rika Shiraki, Kotaro Ichikawa, Tomio Shinke, Nobuaki Arai, Tomonari Akamatsu, Takeshi Hara, Kanjana Adulyanukosol 2009 Development of detection devise for dugong calls. Proceedings of 4th International Symposium on SEASTAR 2000 and Asian Bio-logging Science. (Proceedings of the 8th SEASTAR 2000 Workshop:59-62. (reviewed).  http://hdl.handle.net/2433/71020

Nanako Amamoto, Kotaro Ichikawa, Nobuaki Arai, Tomonari Akamatsu, Tomio Shinke, Takeshi Hara, Kanjana Adulyanukosol 2009 Seasonal characterization of dugong feeding and biomass utilization on selected site in Talibong Island. Proceedings of 4th International Symposium on SEASTAR 2000 and Asian Bio-logging Science. (Proceedings of the 8th SEASTAR 2000 Workshop).:41-44. (reviewed).  http://hdl.handle.net/2433/71024

Kotaro Ichikawa, Tomonari Akamatsu, Nobuaki Arai, Tomio Shinke, Takeshi Hara, Kanjana Adulyanukosl 2009 Preliminary estimation of detection rate of dugong acoustical observation. Proceedings of 4th International Symposium on SEASTAR 2000 and Asian Bio-logging Science. (Proceedings of the 8th SEASTAR 2000 Workshop).:47-50. (reviewed).  http://hdl.handle.net/2433/71022

Kotaro Ichikawa, Tomonari Akamatsu, Tomio Shinke, Kotoe Sasamori, Yukio Miyauchi, Yuki Abe, Kanjana Adulyanukosol, and Nobuaki Arai. 2009 Detection probability of vocalizing dugongs during playback of conspecific calls. Journal of Acoustical Society of America 126( 4):1954-1959. (reviewed).

Naoko Okumura, Kotaro Ichikawa, Tomonari Akamatsu, Nobuaki Arai,Tomio Shinke, Takeshi Hara, Kanjana Adulyanukosol. 2007,05 Stability of Call Sequence in Dugongs' Vocalization. Proceedings of OCEANS’06 Asia Pacific IEEE –Singapore:12-15. DOI:http://dx.doi.org/10.1109/OCEANSAP.2006.4393936 (reviewed).

Naoko Okumura, Kotaro Ichikawa, Tomonari Akamatsu, Nobuaki Arai,Tomio Shinke, Takeshi Hara, Kanjana Adulyanukosol. 2007,05 Stability of Call Sequence in Dugongs' Vocalization. Proceedings of OCEANS’06 Asia Pacific IEEE –Singapore:12-15. DOI:http://dx.doi.org/10.1109/OCEANSAP.2006.4393936 (reviewed).

Naoko Okumura, Kotaro Ichikawa, Tomonari Akamatsu, Nobuaki Arai,Tomio Shinke, Takeshi Hara, Kanjana Adulyanukosol. 2007,05 Stability of Call Sequence in Dugongs' Vocalization. Proceedings of OCEANS’06 Asia Pacific IEEE –Singapore:12-15. DOI:http://dx.doi.org/10.1109/OCEANSAP.2006.4393936 (reviewed).

Naoko Okumura, Kotaro Ichikawa, Tomonari Akamatsu, Nobuaki Arai,Tomio Shinke, Takeshi Hara, Kanjana Adulyanukosol. 2007,05 Stability of Call Sequence in Dugongs' Vocalization. Proceedings of OCEANS’06 Asia Pacific IEEE –Singapore:12-15. DOI:http://dx.doi.org/10.1109/OCEANSAP.2006.4393936 (reviewed).

Naoko Okumura, Kotaro Ichikawa, Tomonari Akamatsu, Nobuaki Arai,Tomio Shinke, Takeshi Hara, Kanjana Adulyanukosol. 2007,05 Stability of Call Sequence in Dugongs' Vocalization. Proceedings of OCEANS’06 Asia Pacific IEEE –Singapore:12-15. DOI:http://dx.doi.org/10.1109/OCEANSAP.2006.4393936 (reviewed).

Naoko Okumura, Kotaro Ichikawa, Tomonari Akamatsu, Nobuaki Arai,Tomio Shinke, Takeshi Hara, Kanjana Adulyanukosol. 2007,05 Stability of Call Sequence in Dugongs' Vocalization. Proceedings of OCEANS’06 Asia Pacific IEEE –Singapore:12-15. DOI:http://dx.doi.org/10.1109/OCEANSAP.2006.4393936 (reviewed).

Naoko Okumura, Kotaro Ichikawa, Tomonari Akamatsu, Nobuaki Arai,Tomio Shinke, Takeshi Hara, Kanjana Adulyanukosol. 2007,05 Stability of Call Sequence in Dugongs' Vocalization. Proceedings of OCEANS’06 Asia Pacific IEEE –Singapore:12-15. DOI:http://dx.doi.org/10.1109/OCEANSAP.2006.4393936 (reviewed).

Kawabata Y, Okuyama J, Ichikawa K, Asami K, Chimura M, Yoseda K, Arai N. 2006,12 Possibility of position estimates for bottom-dwelling aquatic animals in a small area using ultrasonic coded transmitters and passive monitoring receivers. The 3rd international Symposium on SEASTAR2000 and Asian Bio-logging Science:83-87. (reviewed).  http://hdl.handle.net/2433/49748

Kawabata Y, Okuyama J, Ichikawa K, Asami K, Chimura M, Yoseda K, Arai N. 2006,12 Possibility of position estimates for bottom-dwelling aquatic animals in a small area using ultrasonic coded transmitters and passive monitoring receivers. The 3rd international Symposium on SEASTAR2000 and Asian Bio-logging Science:83-87. (reviewed).  http://hdl.handle.net/2433/49748

Kawabata Y, Okuyama J, Ichikawa K, Asami K, Chimura M, Yoseda K, Arai N. 2006,12 Possibility of position estimates for bottom-dwelling aquatic animals in a small area using ultrasonic coded transmitters and passive monitoring receivers. The 3rd international Symposium on SEASTAR2000 and Asian Bio-logging Science:83-87. (reviewed).  http://hdl.handle.net/2433/49748

Tsutsumi, C., Ichikawa, K., Arai, N., Akamatsu, T., Shinke, T., Hara, T., and Adulyanukosol, K 2006,09 Feeding behavior of wild dugongs monitored by a passive acoustical method using an underwater recording system. J. Acoust. Soc. Am. 120(3):1356-1360. DOI:http://dx.doi.org/10.1121/1.2221529 (reviewed).

Tsutsumi, C., Ichikawa, K., Arai, N., Akamatsu, T., Shinke, T., Hara, T., and Adulyanukosol, K 2006,09 Feeding behavior of wild dugongs monitored by a passive acoustical method using an underwater recording system. J. Acoust. Soc. Am. 120(3):1356-1360. DOI:http://dx.doi.org/10.1121/1.2221529 (reviewed).

Tsutsumi, C., Ichikawa, K., Arai, N., Akamatsu, T., Shinke, T., Hara, T., and Adulyanukosol, K 2006,09 Feeding behavior of wild dugongs monitored by a passive acoustical method using an underwater recording system. J. Acoust. Soc. Am. 120(3):1356-1360. DOI:http://dx.doi.org/10.1121/1.2221529 (reviewed).

Ichikawa, K., Tsutsumi, C., Akamatsu, T., Shinke, T., Arai, N., Hara, T., and Adulyanukosol,K 2005 Acoustic detection of dugong using automatic underwater sound monitoring systems: AUSOMS-D. Proceedings of the International Symposium on SEASTAR2000 and Bio-logging Science (The 5th SEASTAR2000 Workshop):64-68. (reviewed).  http://hdl.handle.net/2433/44106

Tsutsumi, C., Ichikawa, K., Akamatsu, T., Arai, N., Shinke, T., Hara, T., and Adulyanukosol, K. 2005 Monitoring dugong feeding behavior in a tidal flat by visual and acoustic observation. Proceedings of the 2nd International symposium on SEASTAR2000 and Asian Bio-logging Science (The 6th SEASTAR2000 Workshop):37-44. (reviewed).  http://hdl.handle.net/2433/44082

Okumura, N., Ichikawa, K., Akamatsu, T., Arai, N., Shinke, T., Hara, T., and Adulyanukosol, K. 2005 Pattern analyses on the vocal structure of dugong calls. Proceedings of the 2nd International symposium on SEASTAR2000 and Asian Bio-logging Science (The 6th SEASTAR2000 Workshop):29-32. (reviewed).  http://hdl.handle.net/2433/44079

Hishimoto, Y., Ichikawa, K., Akamatsu, T., Arai, N 2005 The acoustical characteristics of dugong calls and the behavioral correlates observed in Toba aquarium. Proceedings of the 2nd International symposium on SEASTAR2000 and Asian Bio-logging Science (The 6th SEASTAR2000 Workshop):25-28. (reviewed).  http://hdl.handle.net/2433/44078

Sakamoto, S., Ichikawa, K., Akamatsu, T., Shinke, T., Arai, N., Hara, T., and Adulyanukosol, K. 2005 Analysis on ship noise around dugongs’habitat. Proceedings of the 2nd International symposium on SEASTAR2000 and Asian Bio-logging Science (The 6th SEASTAR2000 Workshop:33-36. (reviewed).  http://hdl.handle.net/2433/44081

Tsutsumi, C., Ichikawa, K., Akamatsu, T., Arai, N., Shinke, T., Hara, T., and Adulyanukosol, K. 2004 A visual-acoustic combined observation method to monitor seagrass bed utilization by dugongs (Dugong dugon) in a tidal flat. Proceedings of the 5th SEASTAR 2000 Workshop:69-71. (reviewed).  http://www.pmbc.go.th/webpmbc/MarEndager/Download/Dugong/2004_Tsutsumi_et_Du_Visual_Acoustic_Behavior_Monitoring.pdf

Ichikawa, K., Akamatsu, T., Shinke, T., Arai, N., Hara, T., and Adulyanukosol,K. 2003 Acoustical analyses on the calls of dugong. Proceedings of the 4th SEASTAR 2000 Workshop:72-76. (reviewed).  http://hdl.handle.net/2433/44136

Research Presentations

【Oral Presentation】

Ichikawa, Kotaro, Akamatsu, Tomonari, Shinke, Tomio, Arai, Nobuaki, Adulyanukosol, Kanjana. Clumped distribution of vocalising dugongs (Dugong dugon) monitored by passive acoustic and visual observations in Thai waters. Acoustics 2012 Fremantle: Acoustics, Development and the Environment, 2012.11.21-2012.11.23, Perth, Australia.

Kotaro Ichikawa, Tomonari Akamatsu, Kanjana Adulyanukosol, Giovanni Damiani, Janet Lanyon, Hiroshi Nawata Intraspecific variation in vocal repertoire among dugong populations. THE ACOUSTICS 2012 HONG KONG, 2012.05.13-2012.05.18, Hong Kong.

Sakura Komiyama, Kotaro Ichikawa and Nobuaki Arai Development of software for extracting contours of animal vocalization . The 8th International Symposium on SEASTAR2000 and Asian Bio-logging Science (The 12th SEASTAR2000 Workshop) , 2012.02.20-2012.02.21, Bangkok, Thailand.

Ichikawa, K., Adulyanukosol, K., Akamatsu, T., Arai, N., Ando-Mizobata, N., Shinke, T., Spatial distribution patterns of solitary, cow-calf pairs and vocalizing dugongs around Talibong Island, Thailand . 19th biennial conference on the biology of marine mammals , 2011.11.27-2011.12.02, Tampa, Florida, USA.

Ichikawa K., Akamatsu, T., Adulyanukosol, K., Damiani, G., Lanyon, J Intraspecific variation in vocal repertoire among dugong populations. the Fifth International Sirenian Symposium 2011, 2011.11.27, Tampa, Florida, USA.

Damiani, Giovanni, Ichikawa, Kotaro, Lanyon, Janet Acoustic characteristics of dugong vocalizations and vocal behaviour of herds in southern Queensland, Australia . Fifth International Sirenian Symposium 2011 , 2011.11.27, Tampa, Florida, USA.

Mitamura, H., Ichikawa, K., Shida, Y., Watanabe, H., Yokota, T., Shoji, J., Shinke, T., and Arai, N., A brand-new acoustic positioning telemetry system monitors movements of a site-specific fish, the black rockfish Sebastes inermis, . 1st International Conference on Fish Telemetery, 2011 , 2011.06.12-2011.06.18, Sapporo, Japan.

Ichikawa, K., Mitamura, H., Shinke, T., Shida, Y., Watanabe, H., Yokota, T., Shoji, J., and Arai, N., Development of a fine-scale acoustic positioning and telemetry system, . 1st International Conference on Fish Telemetery, 2011 , 2011.06.12-2011.06.18, Sapporo, Japan.

Kotaro Ichikawa, Kanjana Adulyanukosol, Tomonari Akamatsu, Nobuaki Arai, Noriko Ando-Mizobata, Tomio Shinke Habitat segregation between solitary dugongs and cow-calf pairs around Talibong Island, Thailand . The 7th international symposium on SEASTAR2000 and Asian Biologging Science (The 11th SEASTAR2000 workshop) , 2011.03.08-2011.03.09, Bangkok, Thailand.

Kotaro Ichikawa Conservation of Keystone Species in Human Subsistence Ecosystems: Studies on vocal behavior of the dugongs in Thailand. RIHN Satellite Symposium for IAS International Conference 2010:Keystone Species of Human Subsistence Ecosystems in Arab Societies, 2010.12.20-2010.12.21, RIHN, Kyoto.

Kotaro Ichikawa, Naoko Okumura, Tomonari Akamatsu, Tomio Shinke, Nobuaki Arai, and Kanjana Adulyanukosol Variance in acoustic characteristics of Dugong calls : Potential cues for age determination. The 6th International symposium on SEASTAR 2000 and Bio-logging Science, 2010.02.23-2010.02.25, Bangkok, Thailand.

Noriko Mizobata, Kotaro Ichikawa, Nobuaki Arai Dugong Vocalization in relation to Environmental Noise. The 6th International symposium on SEASTAR 2000 and Bio-logging Science, 2010.02.23-2010.02.25, Bangkok, Thailand.

Kotaro Ichikawa, Nobuaki Arai, Tomio Shinke, & Kanjana Adulyanukosol Estimation of detection probability of dugongs by underwater and land-base observation in Thailand. The 9th SEASTAR 2000 Workshop(2007), 2009.03.06, Bangkok, Thailand.

Kotaro Ichikawa, Nobuaki Arai, Tomio Shinke, & Kanjana Adulyanukosol Estimation of detection probability of dugongs by underwater and land-base observation in Thailand. The 9th SEASTAR 2000 Workshop(2007), 2009.03.06, Bangkok, Thailand.

Kotaro Ichikawa, Nobuaki Arai, Tomio Shinke, & Kanjana Adulyanukosol Estimation of detection probability of dugongs by underwater and land-base observation in Thailand. The 9th SEASTAR 2000 Workshop(2007), 2009.03.06, Bangkok, Thailand.

Amamoto, N., Ichikawa, K., Arai, N., Akamatsu, T., Shinke, T., Hara, T., and Adulyanukosol, K. Study on characteristics of feeding ground utilization by Dugongs. The 8th SEASTAR 2000 Workshop(2007), 2007.12.15-2007.12.17, Phuket, Thailand.

Ichikawa, K., Akamatsu, T., Arai, N., Shinke, T., Hara, T., and Adulyanukosol, K. Call-back behavior and inter-individual spacing of Dugongs (Dugon dugon) suggest ranging function in the context of vocal exchange. The 8th SEASTAR 2000 Workshop(2007), 2007.12.15-2007.12.17, Phuket, Thailand.

Shiraki, R., Ichikawa, K., Shinke T., Arai, N., Akamatsu, T., Hara, T., and Adulyanukosol, K. Development of detection devise for Dugong calls. The 8th SEASTAR 2000 Workshop(2007), 2007.12.15-2007.12.17, Phuket, Thailand.

K. Ichikawa, T. Akamatsu, N. Arai, T. Shinke, T. Hara, and K.Adulyanukosol: "Evidence of spacing behavior and the propagation characteristics of dugong (Dugong dugon) calls suggest their ranging function and the acoustical scouting distance, . The 17th Biennial Conference on the Biology of Marine Mammals (2007), 2007.11.29-2007.12.03, Capetown, South Africa.

Kotaro Ichikawa, Tomonori Akamatsu, Tomio Shinke, Nobuaki Arai, Takeshi Hara and Kanjana Adulyanukosol WILD DUGONGS RESPOND ACOUSTICALLY TO THEIR NEIGHBORS. The 3rd International symposium on SEASTAR 2000 and Bio-logging Science, 2006.12.13-2006.12.14, Bangkok, Thailand.

Shimako Sakamoto, Kotaro Ichikawa, Tomonori Akamatsu, Tomio Shinke, Nobuaki Arai, Takeshi Hara and Kanjana Adulyanukosol DEVELOPMENT OF A METHOD FOR MONITORING SHIP NAVIGATIONS. The 3rd International symposium on SEASTAR 2000 and Bio-logging Science, 2006.12.13-2006.12.14, Bangkok, Thailand.

Shimako Sakamoto, Kotaro Ichikawa, Tomonori Akamatsu, Tomio Shinke, Nobuaki Arai, Takeshi Hara and Kanjana Adulyanukosol DEVELOPMENT OF A METHOD FOR MONITORING SHIP NAVIGATIONS. The 3rd International symposium on SEASTAR 2000 and Bio-logging Science, 2006.12.13-2006.12.14, Bangkok, Thailand.

Matiss Zagars, Kou Ikejima, Nobuaki Arai, Hiromichi Mitamura, Kotaro Ichikawa and Prasert Tongnunui MIGRATION PAGGEN OF LUTJANUS ARGENTIMACULATUS IN THE MANGROVE ESTUARY IN TRANG PROVINCE, THAILAND AS REVELED BY ULTRASONIC TELEMETORY. The 3rd International symposium on SEASTAR 2000 and Bio-logging Science, 2006.12.13-2006.12.14, Bangkok, Thailand.

Matiss Zagars, Kou Ikejima, Nobuaki Arai, Hiromichi Mitamura, Kotaro Ichikawa and Prasert Tongnunui MIGRATION PAGGEN OF LUTJANUS ARGENTIMACULATUS IN THE MANGROVE ESTUARY IN TRANG PROVINCE, THAILAND AS REVELED BY ULTRASONIC TELEMETORY. The 3rd International symposium on SEASTAR 2000 and Bio-logging Science, 2006.12.13-2006.12.14, Bangkok, Thailand.

Naoko Okumura, Kotaro Ichikawa ,Tomonari Akamatsu, Nobuaki Arai, Tomio Shinke, Takeshi Hara and Kanjana Adulyanukosol PATTERN ANALYSIS ON THE VOCAL STRUCTURE OF CALLS AND GEOGRAPHIC VARIATIONS AMONG THREE AREAS. The 3rd International symposium on SEASTAR 2000 and Bio-logging Science, 2006.12.13-2006.12.14, Bangkok, Thailand.

Kotaro Ichikawa, Tomonori Akamatsu, Tomio Shinke, Nobuaki Arai, Takeshi Hara and Kanjana Adulyanukosol WILD DUGONGS RESPOND ACOUSTICALLY TO THEIR NEIGHBORS. The 3rd International symposium on SEASTAR 2000 and Bio-logging Science, 2006.12.13-2006.12.14, Bangkok, Thailand.

Shimako Sakamoto, Kotaro Ichikawa, Tomonori Akamatsu, Tomio Shinke, Nobuaki Arai, Takeshi Hara and Kanjana Adulyanukosol DEVELOPMENT OF A METHOD FOR MONITORING SHIP NAVIGATIONS. The 3rd International symposium on SEASTAR 2000 and Bio-logging Science, 2006.12.13-2006.12.14, Bangkok, Thailand.

Yoichiro Hishimoto, Kotaro Ichikawa, Tomonari Akamatsu and Nobuaki Arai THE CORRELATION BETWEEN VOCALIZATION AND BEHAVIOR OF CAPTIVE DUGONGS. The 3rd International symposium on SEASTAR 2000 and Bio-logging Science, 2006.12.13-2006.12.14, Bangkok, Thailand.

Naoko Okumura, Kotaro Ichikawa ,Tomonari Akamatsu, Nobuaki Arai, Tomio Shinke, Takeshi Hara and Kanjana Adulyanukosol PATTERN ANALYSIS ON THE VOCAL STRUCTURE OF CALLS AND GEOGRAPHIC VARIATIONS AMONG THREE AREAS. The 3rd International symposium on SEASTAR 2000 and Bio-logging Science, 2006.12.13-2006.12.14, Bangkok, Thailand.

Naoko Okumura, Kotaro Ichikawa ,Tomonari Akamatsu, Nobuaki Arai, Tomio Shinke, Takeshi Hara and Kanjana Adulyanukosol PATTERN ANALYSIS ON THE VOCAL STRUCTURE OF CALLS AND GEOGRAPHIC VARIATIONS AMONG THREE AREAS. The 3rd International symposium on SEASTAR 2000 and Bio-logging Science, 2006.12.13-2006.12.14, Bangkok, Thailand.

Kotaro Ichikawa, Tomonori Akamatsu, Tomio Shinke, Nobuaki Arai, Takeshi Hara and Kanjana Adulyanukosol WILD DUGONGS RESPOND ACOUSTICALLY TO THEIR NEIGHBORS. The 3rd International symposium on SEASTAR 2000 and Bio-logging Science, 2006.12.13-2006.12.14, Bangkok, Thailand.

Yoichiro Hishimoto, Kotaro Ichikawa, Tomonari Akamatsu and Nobuaki Arai THE CORRELATION BETWEEN VOCALIZATION AND BEHAVIOR OF CAPTIVE DUGONGS. The 3rd International symposium on SEASTAR 2000 and Bio-logging Science, 2006.12.13-2006.12.14, Bangkok, Thailand.

Yoichiro Hishimoto, Kotaro Ichikawa, Tomonari Akamatsu and Nobuaki Arai THE CORRELATION BETWEEN VOCALIZATION AND BEHAVIOR OF CAPTIVE DUGONGS. The 3rd International symposium on SEASTAR 2000 and Bio-logging Science, 2006.12.13-2006.12.14, Bangkok, Thailand.

Matiss Zagars, Kou Ikejima, Nobuaki Arai, Hiromichi Mitamura, Kotaro Ichikawa and Prasert Tongnunui MIGRATION PAGGEN OF LUTJANUS ARGENTIMACULATUS IN THE MANGROVE ESTUARY IN TRANG PROVINCE, THAILAND AS REVELED BY ULTRASONIC TELEMETORY. The 3rd International symposium on SEASTAR 2000 and Bio-logging Science, 2006.12.13-2006.12.14, Bangkok, Thailand.

Naoko Okumura , Kotaro Ichikawa ,Tomonari Akamatsu , Nobuaki Arai, Tomio Shinke, Takeshi Hara, and Kanjana Adulyanukosol STABILITY OF CALL SEQUENCE IN DUGONGS’ VOCALIZATION. Ocean’s 06 Asia Pacific IEEE-Singapore, 2006.05.16-2006.05.19, Swissotel, The Stamford, Singapore.

Naoko Okumura , Kotaro Ichikawa ,Tomonari Akamatsu , Nobuaki Arai, Tomio Shinke, Takeshi Hara, and Kanjana Adulyanukosol STABILITY OF CALL SEQUENCE IN DUGONGS’ VOCALIZATION. Ocean’s 06 Asia Pacific IEEE-Singapore, 2006.05.16-2006.05.19, Swissotel, The Stamford, Singapore.

Naoko Okumura , Kotaro Ichikawa ,Tomonari Akamatsu , Nobuaki Arai, Tomio Shinke, Takeshi Hara, and Kanjana Adulyanukosol STABILITY OF CALL SEQUENCE IN DUGONGS’ VOCALIZATION. Ocean’s 06 Asia Pacific IEEE-Singapore, 2006.05.16-2006.05.19, Swissotel, The Stamford, Singapore.

Sakamoto, S., Ichikawa, K., Akamatsu, T., Shinke, T., Arai, N., Hara, T., and Adulyanukosol, K. Analysis on ship noise around dugongs’habitat. The 2nd International symposium on SEASTAR 2000 and Bio-logging Science, 2005.12.13-2005.12.15, Bangkok, Thailand.

Okumura, N., Ichikawa, K., Akamatsu, T., Arai, N., Shinke, T., Hara, T., and Adulyanukosol, K. Pattern analyses on the vocal structure of dugong calls. The 2nd International symposium on SEASTAR 2000 and Bio-logging Science, 2005.12.13-2005.12.15, Bangkok, Thailand.

Hishimoto, Y., Ichikawa, K., Akamatsu, T., Arai, N. The acoustical characteristics of dugong calls and the behavioral correlates observed in Toba aquarium. The 2nd International symposium on SEASTAR 2000 and Bio-logging Science, 2005.12.13-2005.12.15, Bangkok, Thailand.

Tsutsumi, C., Ichikawa, K., Akamatsu, T., Arai, N., Shinke, T., Hara, T., and Adulyanukosol, K. Monitoring dugong feeding behavior in a tidal flat by visual and acoustic observation. The 2nd International symposium on SEASTAR 2000 and Bio-logging Science, 2005.12.13-2005.12.15, Bangkok, Thailand.

T. Akamatsu, K. Ichikawa, C. Tsutsumi, T. Shinke, N. Arai, T. Hara, and K. Adulyanukosol A hydrophone array system to monitor the underwater phonating behavior of dugong. 9th International Mammalogical Congress, 2005.07.31-2005.08.05, 北海道札幌市.

Kotaro Ichikawa, Tomonari Akamatsu, Tomio Shinke, Nobuaki Arai, Takeshi Hara& Kanjana Adulyanukosol Acoustic detection of Dugongs using automatic underwater sound monitoring systems: AUSOMS-D. International Symposium on SEASTAR 2000 and Bio-logging Science, 2004.12.13-2004.12.15, Bangkok, Thailand.

Kotaro Ichikawa, Tomonari Akamatsu, Tomio Shinke, Takeshi Hara & Kanjana Adulyanukosol Acoustical analyses on the calls of dugong - Constructing a monitoring method for dugong-. Seagrass conservation conference, 2004.02.20, Phuket, Thailand.

Kotaro Ichikawa, Nobuaki Arai, Tomonari Akamatsu, Tomio Shinke, Takeshi Hara& Kanjana Adulyanukosol Acoustical analyses on the calls of dugong. The 4th SEASTAR2000 workshop, 2003.12.11-2003.12.13, Bangkok, Thailand.

Kotaro Ichikawa, Tomonari Akamatsu, Tomio Shinke, Takeshi Hara & Kanjana Adulyanukosol Acoustical analyses on the calls of dugong. Aquatic mammals workshop, 2003.02.12, Kyoto, JAPAN..

【Poster Presentation】

Yuuki Matsuo, Kotaro Ichikawa, Noriko Mizobata, Kozue Kinoshita and Nobuaki Arai Cyclic change of dugng's vocal behavior. The 1stDesign Symposium on Conservation of Ecosystem (SEASTAR2000), 2013.03.18-2013.03.19.

Kazunori Kikuchi, Kotaro Ichikawa, Ko Fujioka, Hiromu Fukuda, Hiromichi Mitamura and Nobuaki Arai Development of a fine-scale acoustic positioning and temeletry system for schooling behavior of bluefin tuna. The 1stDesign Symposium on Conservation of Ecosystem (SEASTAR2000), 2013.03.18-2013.03.19, Kyoto University Clock Tower Centennial Hall, Kyoto, Japan.

Masahiro Nakagawa, Kotaro Ichikawa, Toyoki Sasakura, Hiromichi Mitamura and Nobuaki Arai Development and evaluation of ultrasonic transmitter using frequency modulation for biotelemetry. The 1stDesign Symposium on Conservation of Ecosystem (SEASTAR2000), 2013.03.18-2013.03.19, Kyoto University, Japan.

Sakura Komiyama, Kotaro Ichikawa and Nobuaki Arai Individual difference of dugong vocalization. The 1stDesign Symposium on Conservation of Ecosystem (SEASTAR2000), 2013.03.18-2013.03.19, Kyoto University, Japan.

Damiani, Giovanni, Ichikawa, Kotaro, Lanyon, Janet Acoustic characteristics of dugong vocalizations and vocal behaviour of herds in southern Queensland, Australia.. 19th biennial conference on the biology of marine mammals, 2011.11.27-2011.12.02, Tampa. Florida.

Noriko Ando-Mizobata, Kotaro Ichikawa, Nobuaki Arai, Kanjana Adulyanukosol Daily patterns of vocal characteristics of dugongs in Thailand. 19th biennial conference on the biology of marine mammals, 2011.11.27-2011.12.02, Tampa, Florida, USA.

Ichikawa, Kotaro; Akamatsu, Tomonari; Shinke, Tomio; Arai, Nobuaki; Kotoe Sasamori; Yukio Miyauchi; Yuki Abe; Kanjana Adulyanukosol; Vocal hot spots of dugongs (Dugong dugon) monitored using simultaneous passive acoustic methods and visual observations in Thai waters.. 18th Biennial Conference on the Biology of Marine Mammals, 2009.10.12-2009.10.16, Quebec, Canada.

Rika Shiraki, Kotaro Ichikawa, Tomio Shinke, Nobuaki Arai, Tomonari Akamatsu and Kanjana Adulyanukosol Development of detection algorithms for dugong calls. the 13th Auditory Research Forum, 2008.12.06, Shiga, Japan.

Ichikawa, K.; Tsutsumi, C.; Akamatsu, T.; Shinke, T.; Arai, N.; Hara, T.; Adulyanukosol, K. The function of dugongs’ chirp calls, revealed in a wild playback experiment. the 16th Biennial Conference on the Biology of Marine Mammals, 2005.12.10-2005.12.16, California, San Diego,USA.

Kotaro Ichikawa, Tomonari Akamatsu, Tomio Shinke, Nobuaki Arai, Chika Tsutsumi & Kanjana Adulyanukosol Acoustical monitoring of dugong. OCEANS’04/TECHNO-OCEAN, 2004.11.10-2004.11.12, 神戸国際展示場エントランスホール、神戸、日本. ポスター賞受賞

【Invited Lecture / Honorary Lecture / Panelist】

Yoichiro Hishimoto, Kotaro Ichikawa, Nobuaki Arai Behavior and the vocalization characteristics of the dugong observed in Toba aquarium. 1st International Conference on Seagrass Ecology and Dugong 2009, 2009.12.02-2009.12.04, Trang, Thailand. 招待講演

Kotaro Ichikawa, Tomonari Akamatsu, Tomio Shinke, Nobuaki Arai, Kanjana Adulyanukosol, Spatial concentration of dugong vocalizations monitored using a towed stereo hydrophone system.. 1st International Conference on Seagrass Ecology and Dugong 2009, 2009.12.02-2009.12.04, Trang, Thailand. 招待講演

Ichikawa, Kotaro; Akamatsu, Tomonari; Arai, Nobuaki; Shinke, Tomio & Adulyanukosol, Kanjana. Wild dugongs’ vocal responses to conspecific calls. 4th JOINT MEETING OF THE ACOUSTICAL SOCIETY OF AMERICA AND THE ACOUSTICAL SOCIETY OF JAPAN, 2006.11.28-2006.12.02, Honolulu, Hawaii. 招待講演

Ichikawa, Kotaro; Akamatsu, Tomonari; Arai, Nobuaki; Shinke, Tomio & Adulyanukosol, Kanjana. Wild dugongs’ vocal responses to conspecific calls. 4th JOINT MEETING OF THE ACOUSTICAL SOCIETY OF AMERICA AND THE ACOUSTICAL SOCIETY OF JAPAN, 2006.11.28-2006.12.02, Honolulu, Hawaii. 招待講演

Ichikawa, Kotaro; Akamatsu, Tomonari; Arai, Nobuaki; Shinke, Tomio & Adulyanukosol, Kanjana. Wild dugongs’ vocal responses to conspecific calls. 4th JOINT MEETING OF THE ACOUSTICAL SOCIETY OF AMERICA AND THE ACOUSTICAL SOCIETY OF JAPAN, 2006.11.28-2006.12.02, Honolulu, Hawaii. 招待講演