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• How to treat mixed behavior segments in supervised machine learning of behavioral modes from inertial measurement data

  Resheff Y, Bensch H M, Zottl M, Harel R, Matsumoto-Oda A, Crofoot M, Gomez S, Börger L, Rotics S

  Moving Ecology   12 ( 44 )   2024年06月 [ 査読有り ]

  掲載種別: 研究論文（学術雑誌）

  　概要を見る

  The application of supervised machine learning methods to identify behavioural modes from inertial measurements of bio-loggers has become a standard tool in behavioural ecology. Several design choices can affect the accuracy of identifying the behavioural modes. One such choice is the inclusion or exclusion of segments consisting of more than a single behaviour (mixed segments) in the machine learning model training data. Currently, the common practice is to ignore such segments during model training. In this paper we tested the hypothesis that including mixed segments in model training will improve accuracy, as the model would perform better in identifying them in the test data. We test this hypothesis using a series of data simulations on four datasets of accelerometer data coupled with behaviour observations, obtained from four study species (Damaraland mole-rats, meerkats, olive baboons, polar bears). Results show that when a substantial proportion of the test data are mixed behaviour segments (above ~ 10%), including mixed segments in machine learning model training improves the accuracy of classification. These results were consistent across the four study species, and robust to changes in segment length, sample size, and degree of mixture within the mixed segments. However, we also find that in some cases (particularly in baboons) models trained with mixed segments show reduced accuracy in classifying test data containing only single behaviour (pure) segments, compared to models trained without mixed segments. Based on these results, we recommend that when the classification model is expected to deal with a substantial proportion of mixed behaviour segments (> 10%), it is beneficial to include them in model training, otherwise, it is unnecessary but also not harmful. The exception is when there is a basis to assume that the training data contains a higher rate of mixed segments than the actual (unobserved) data to be classified—such a situation may occur particularly when training data are collected in captivity and used to classify data from the wild. In this case, excess inclusion of mixed segments in training data should probably be avoided.

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• Reduction of bitter taste receptor gene family in folivorous Colobines as compared with omnivorous Cercopithecines in Primates

  Hou M, Akhtar MS, Hayashi M, Ashino, Matsumoto-Oda A, Hayakawa T, Ishida T, Melin AD, Imai H, Kawamura S

  Primates   65   311 - 331   2024年 [ 査読有り ]

  掲載種別: 研究論文（学術雑誌）

  関連する研究費コード: Japan Society for the Promotion of Science 23405016

  　概要を見る

  Bitter taste perception is important in preventing animals from ingesting potentially toxic compounds. Whole-genome assembly (WGA) data have revealed that bitter taste receptor genes (TAS2Rs) comprise a multigene family with dozens of intact and disrupted genes in primates. However, publicly available WGA data are often incomplete, especially for multigene families. In this study, we employed a targeted capture (TC) approach specifically probing TAS2Rs for ten species of cercopithecid primates with diverse diets, including eight omnivorous cercopithecine species and two folivorous colobine species. We designed RNA probes for all TAS2Rs that we modeled to be intact in the common ancestor of cercopithecids (“ancestral-cercopithecid TAS2R gene set”). The TC was followed by short-read and high-depth massive-parallel sequencing. TC retrieved more intact TAS2R genes than found in WGA databases. We confirmed a large number of gene “births” at the common ancestor of cercopithecids and found that the colobine common ancestor and the cercopithecine common ancestor had contrasting trajectories: four gene “deaths” and three gene births, respectively. The number of intact TAS2R genes was markedly reduced in colobines (25–28 detected via TC and 20–26 detected via WGA analysis) as compared with cercopithecines (27–36 via TC and 19–30 via WGA). Birth or death events occurred at almost every phylogenetic-tree branch, making the composition of intact genes variable among species. These results show that evolutionary change in intact TAS2R genes is a complex process, refute a simple general prediction that herbivory favors more TAS2R genes, and have implications for understanding dietary adaptations and the evolution of detoxification abilities.

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• Estimating individual exposure to predation risk in group-living baboons, Papio anubis.

  Suire A, Kunita I, Harel R, Crofoot M, Mutinda M, Kamau M, Hassel JM, Murray S, Kawamura S, Matsumoto-Oda A

  PloS one ( Public Library of Science (PLoS) )  18 ( 11 ) e0287357 - e0287357   2023年 [ 査読有り ]

  掲載種別: 研究論文（学術雑誌）

  　概要を見る

  In environments with multiple predators, vulnerabilities associated with the spatial positions of group-living prey are non-uniform and depend on the hunting styles of the predators. Theoretically, coursing predators follow their prey over long distances and attack open areas, exposing individuals at the edge of the group to predation risk more than those at the center (marginal predation). In contrast, ambush predators lurk unnoticed by their prey and appear randomly anywhere in the group; therefore, isolated individuals in the group would be more vulnerable to predators. These positions of vulnerability to predation are expected to be taken by larger-bodied males. Moreover, dominant males presumably occupy the center of the safe group. However, identifying individuals at higher predation risk requires both simultaneous recording of predator location and direct observation of predation events; empirical observations leave ambiguity as to who is at risk. Instead, several theoretical methods (predation risk proxies) have been proposed to assess predation risk: (1) the size of the individual ‘unlimited domain of danger’ based on Voronoi tessellation, (2) the size of the ‘limited domain of danger’ based on predator detection distance, (3) peripheral/center position in the group (minimum convex polygon), (4) the number and direction of others in the vicinity (surroundedness), and (5) dyadic distances. We explored the age-sex distribution of individuals in at-risk positions within a wild baboon group facing predation risk from leopards, lions, and hyenas, using Global Positioning System collars. Our analysis of the location data from 26 baboons revealed that adult males were consistently isolated at the edge of the group in all predation risk proxies. Empirical evidence from previous studies indicates that adult male baboons are the most frequently preyed upon, and our results highlights the importance of spatial positioning in this.

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• BATHING BEHAVIOUR IN SPOTTED HYENAS (CROCUTA CROCUTA) IN LAIKIPIA, KENYA: TWO OBSERVATIONAL CASES

  Akiko Matsumoto-Oda

  Journal of East African Natural History   110 ( 2 ) 87 - 92   2022年01月 [ 査読有り ]

  掲載種別: 研究論文（学術雑誌）

• Point of Care Blood Gas and Electrolyte Analysis in Anesthetized Olive Baboons (Papio anubis) in a Field Setting

  Kamau M.W.

  International Journal of Primatology ( International Journal of Primatology )  42 ( 5 ) 667 - 681   2021年10月 [ 査読有り ]

  掲載種別: 研究論文（学術雑誌）

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• 進化でわかる人間行動の事典

  小田, 亮, 橋彌, 和秀, 大坪, 庸介, 平石, 界 ( 担当: その他 )

  朝倉書店  2021年05月 ( ページ数: viii, 307p )

• 世界で一番美しいサルの図鑑

  京都大学霊長類研究所 ( 担当: 分担執筆 )

  エクスナレッジ  2017年11月 ( ページ数: 223p )

• 行動生物学辞典

  上田, 恵介, 岡ノ谷, 一夫, 菊水, 健史, 坂上, 貴之, 辻, 和希, 友永, 雅己, 中島, 定彦, 長谷川, 寿一, 松島, 俊也 ( 担当: 分担執筆 )

  東京化学同人  2013年11月 ( ページ数: 637p )

• 人類の移動誌

  松本晶子 ( 担当: 分担執筆 , 担当範囲: ヒヒはなぜサバンナへ移動したか. )

  臨川書店. p48-53  2013年04月 ( ページ数: 363, viiip, 図版 [4] p )

• ヒトはどのように進化してきたか

  Boyd Robert, Silk Joan B., 松本 晶子, 小田 亮 ( 担当: 単著 )

  ミネルヴァ書房  2011年

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• ヒヒとヒト サバンナの隣人から見える社会性の起源

  松本晶子

  現代思想2017年6月号 特集＝変貌する人類史     175 - 189   2017年05月

   

• Nocturnal leopard (Panthera pardus) predation risk for olive baboons (Papio anubis) in Kenya

  Laura R. Bidner, Lynne A. Isbell, Akiko Matsumoto-Oda

  AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY ( WILEY-BLACKWELL )  159   95 - 95   2016年03月

   

• ケニアの私立保護区におけるワイルドライフ・ツーリズムに関する予備的研究

  武田美亜, Martin Mulama, 松本晶子

  観光科学   5   11 - 17   2013年

   

• 大学生に対する環境教育における，自然体験活動の意義

  松本晶子, 釜本健司, 早石周平

  沖縄大学人文学部紀要   10   43 - 52   2009年  [査読有り]

   

• Synchrony and asynchrony of estrous swelling in Mahale chimpanzees: II

  A Matsumoto-Oda, E Kasuya, Y Takahata

  ANTHROPOLOGICAL SCIENCE ( ANTHROPOLOGICAL SOC NIPPON )  110 ( 1 ) 72 - 72   2002年01月

   

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• 日本アフリカ学会研究奨励賞

  1998年   日本アフリカ学会  

  受賞者: その他の受賞者

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• 寝場所の共有が野生ヒヒの睡眠の質に及ぼす影響

  基盤研究(B)

  課題番号: 24K02110

  研究期間: 2024年04月  -  2027年03月 

• 民間保護区と公的博物館の連携による野生動物保全手法の創発

  国際共同研究加速基金(海外連携研究)

  課題番号: 23KK0198

  研究期間: 2023年10月  -  2027年03月 

• サバンナヒヒにおける捕食者対策：群れ形成のダイナミクスと意思決定方法の解明

  基盤研究(B)

  課題番号: 00000000

  研究期間: 2019年04月  -  2022年03月 

  代表者: 松本 晶子 

  直接経費: 0（円）  間接経費: 0（円）  金額合計: 0（円）

• 捕食圧がサバンナヒヒの生活史に及ぼす影響

  基盤研究(B)

  課題番号: 16H05776

  研究期間: 2016年04月  -  2019年03月 

  代表者: 松本　晶子  研究分担者: 河村 正二 東京大学, 大学院新領域創成科学研究科, 教授 (40282727) 國松 豊 龍谷大学, 経営学部, 教授 (80243111)

  直接経費: 13,100,000（円）  間接経費: 3,930,000（円）  金額合計: 17,030,000（円）

• アヌビスヒヒにみられる創傷の治癒促進

  挑戦的萌芽研究

  課題番号: 26650172

  研究期間: 2014年  -  2016年 

  代表者: 松本晶子 

  直接経費: 3,100,000（円）  間接経費: 930,000（円）  金額合計: 4,030,000（円）

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