@article{oai:az.repo.nii.ac.jp:00005163,
 author = {坂田, 亮一 and 太田, 光明 and 田中, 智夫 and ターナー, デニス and Sakata, Ryoichi and Ohta, Mitsuaki and Tanaka, Toshio and Turner, Dennis C.},
 journal = {麻布大学雑誌, Journal of Azabu University},
 month = {Mar},
 note = {水中生活を営むイルカにとって音声によるコミュニケーションは,群れ社会の相互関係を円滑にするため数千万年にわたって高度に発達させた方法であろう。本研究では,人工飼育下において,1)給餌の前(Pre-feeding),2)給餌のとき(Feeding),3)人のいない自由なとき(Free),4)ふれあい場で人と関わるとき(Float),5)人が水中にいるとき(Water)の5つの状態におけるイルカの鳴音の変化について記録解析した。記録した音声は,Spectrogramを用いて2642のホイッスルソナグラムに分けた。10分間単位のホイッスル数は,Freeで最も少なく,Pre-feedingで最も多かった。Pre-feedingと同様に人が存在するFeeding,Float,Waterでもホイッスル数は増加した。ホイッスルソナグラムはそれぞれの条件において明らかに異なり,Pre-feedingでは凸型,波形,トリル型が繰り返し出現した。一方,Feedingでは,特徴的な上昇型が多くみられ,エコーロケーションとの関連が示唆された。また,ホイッスルソナグラムの解析から,Pre-feedingにおいて低周波が記録され,空腹と関連する感晴表現を推測した。最近のイルカ介在療法に関する研究および本研究の結果から,イルカが人との関わりで鳴音を増加させ,このことが人の健康に影響を与えるとの仮説についてさらに検討が必要であるが,本研究で得られたイルカ鳴音データはイルカと人の相互作用,特にイルカ介在療法を推進するに際し,重要な指標となる。, The acoustic mode is the most reasonable means for social animals such as dolphins to maintain contact in the underwater habitat, and has been developed since they moved to the sea. This study investigates variations in dolphin vocalizations under the following conditions in a captive environment : 1) before feeding (Pre-feeding), 2) during feeding (Feeding), 3) during free time without the presence of people (Free), 4) during interaction with people located upon a float (Float), 5) during interaction with people in the water (Water). During the experiments, a total of 2642 whistles were extracted from sonogram data using a spectrogram. About 44% of the total whistles were observed during Pre-feeding (1171/2642), and the number recorded during Free, when people were absent, was the smallest. The acoustic contours of dolphin whistles differed in different situations : convex, wave, and trill whistles were made repeatedly during Pre-feeding, thereby being more common at this time than at other times. The situation of Feeding saw an increased number of Upsweeps, which might be related to the use of echolocation. The lower frequencies were recorded during Pre-feeding, reflecting the emotion related to the dolphin's hunger. The results of this study indicate that dolphins increase their vocalization during interaction with people, suggesting that interactions with dolphins provide an effective treatment for human health problems, which is discussed with a reference article in this study. Vocal data obtained during contact with humans might serve as an important index for the dolphin-assisted therapy., P(論文), 特集, application/pdf, FEATURE ARTICLES},
 pages = {280--286},
 title = {ヒトと動物の関係を科学する新分野の創造 : 応用動物科学がもたらす豊かな社会 : I.人との関わりによるバンドウイルカ(Tursiops Truncatus)鳴音の増加},
 volume = {13/14},
 year = {2007},
 yomi = {サカタ, リョウイチ and オオタ, ミツアキ and タナカ, トシオ}
}