論文 - 松本　晶子

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）

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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

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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）

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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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HEXACO, Dark Triad and altruism in daily life

■■■

Pres Individ Differ   185   2021年10月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

Influence of rainfall on sleeping site choice by a group of anubis baboons (Papio anubis).

Suire A, Isbell LA, Bidner LR, Shinoda Y, Akasaka M, Matsumoto-Oda A

American journal of primatology ( American Journal of Primatology )  83 ( 1 ) e23223   2021年01月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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Capture, immobilization, and Global Positioning System collaring of olive baboons (Papio anubis) and vervets (Chlorocebus pygerythrus): Lessons learned and suggested best practices.

Isbell LA, Bidner LR, Omondi G, Mutinda M, Matsumoto-Oda A

American journal of primatology ( American Journal of Primatology )  81 ( 6 ) e22997   2019年07月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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Complete rectal prolapse in wild anubis baboons (Papio anubis).

Taniguchi H, Isbell LA, Bidner LR, Matsumoto-Oda A

Journal of medical primatology ( Journal of Medical Primatology )  48 ( 3 ) 179 - 181   2019年06月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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Expression Changes of Structural Protein Genes May Be Related to Adaptive Skin Characteristics Specific to Humans.

Arakawa N, Utsumi D, Takahashi K, Matsumoto-Oda A, Nyachieo A, Chai D, Jillani N, Imai H, Satta Y, Terai Y

Genome biology and evolution ( Genome Biology and Evolution )  11 ( 3 ) 613 - 628   2019年03月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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ウシのグループ育成を通して見る現代の沖縄闘牛における牛主にとっての闘牛.

池本倫太郎, 松本晶子

観光科学   9   22 - 34   2019年03月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

平和を構築する条件-よりよい社会を作るための人間行動学的理解-　特集にあたって

松本 晶子

生物科学   70   130 - 133   2019年

掲載種別: 研究論文（学術雑誌）

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The role of sleeping sites in the predator-prey dynamics of leopards and olive baboons.

Bidner LR, Matsumoto-Oda A, Isbell LA

American journal of primatology ( American Journal of Primatology )  80 ( 12 ) e22932   2018年12月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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Group size effects on inter-blink interval as an indicator of antipredator vigilance in wild baboons.

Matsumoto-Oda A, Okamoto K, Takahashi K, Ohira H

Scientific reports ( Scientific Reports )  8 ( 1 ) 10062   2018年07月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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Rearing the African Grass Blue Butterfly Zizeeria knysna: Toward the Establishment of a Bioindicator in African Countries

IWATA Masaki, MATSUMOTO-ODA Akiko, OTAKI Joji M.

African Study Monographs ( 京都大学アフリカ地域研究資料センター )  39 ( 2 ) 69 - 81   2018年06月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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Urbanization and environmental pollution have increasingly become important issues in African countries. For environmental risk management, it is important to conduct field surveys for potential surrogate species and establish their ecotoxicological rearing experiments. A rearing system for the pale grass blue butterfly Zizeeria maha (Lepidoptera, Lycaenidae) has been successfully employed in Japan for the assessment of human-living environments, including rural and urban areas. A phylogenetically related species, the African grass blue butterfly Zizeeria knysna, lives in human residential environments widely in African countries. Thus, this species is potentially useful as a similar bioindicator in Africa. This paper reports the establishment of a simple and economical rearing system for Zizeeria knysna as well as some morphological traits of the immature and adult stages of this species. Females were obtained in central Kenya and confined in a meshed cage where eggs were readily obtained. Hatched larvae were reared on a natural host plant Oxalis corniculata. The failure rate of eclosion from pupae to adults was 6.5%, and the reared adult individuals showed normal color patterns, demonstrating the high efficiency of this rearing system. The rearing method for Zizeeria knysna in the present study may provide a basis for future human-living environmental assessments in Africa.

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GPS-identified vulnerabilities of savannah-woodland primates to leopard predation and their implications for early hominins.

Isbell LA, Bidner LR, Van Cleave EK, Matsumoto-Oda A, Crofoot MC

Journal of human evolution ( Journal of Human Evolution )  118   1 - 13   2018年05月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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Rearing the African grass blue butterfly Zizeeria knysna (Lepidoptera: Lycaenidae) and its morphological comparison among the genus Zizeeria: Toward the establishment of a bioindicator in African countries.

Iwata M, Matsumoto-Oda A, Otaki J

Afr Stu Monogr   39   69 - 81   2018年 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

Wound healing in wild male baboons: Estimating healing time from wound size.

Taniguchi H, Matsumoto-Oda A

PloS one ( PLoS ONE )  13 ( 10 ) e0205017   2018年 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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GPS-identified, low-level nocturnal activity of vervets (Chlorocebus pygerythrus) and olive baboons (Papio anubis) in Laikipia, Kenya.

Isbell LA, Bidner LR, Crofoot MC, Matsumoto-Oda A, Farine DR

American journal of physical anthropology ( WILEY )  164 ( 1 ) 203 - 211   2017年09月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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Objectives: Except for owl monkeys (Aotus spp.), all anthropoid primates are considered strictly diurnal. Recent studies leveraging new technologies have shown, however, that some diurnal anthropoids also engage in nocturnal activity. Here we examine the extent to which vervets (Chlor-ocebus pygerythrus) and olive baboons (Papio anubis) are active at night. Materials and Methods: We deployed GPS collars with tri-axial accelerometer data loggers on 18 free-ranging adult females: 12 vervets spread among 5 social groups, and 6 olive baboons spread among 4 groups. Their locations were recorded every 15 min, and their activity levels, for 3 s/min over 7.5 months. We also used camera traps that were triggered by heat and movement at seven sleeping sites. Results: Travel was detected on 0.4% of 2,029 vervet-nights involving 3 vervets and 1.1% of 1,109 baboon-nights involving 5 baboons. Travel was mainly arboreal for vervets but mainly terrestrial for baboons. During the night, vervets and baboons were active 13% and 15% of the time, respectively. Activity varied little throughout the night and appeared unaffected by moon phase. Discussion: Our results confirm the low nocturnality of vervets and olive baboons, which we suggest is related to living near the equator with consistent 12-hr days, in contrast to other anthropoids that are more active at night. Since anthropoid primates are thought to have evolved in northern latitudes, with later dispersal to tropical latitudes, our results may have implications for understanding the evolution of anthropoid diurnality.

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総説：観光による自然資源への正負の影響

その他の著者

Vol.8 (2016/12) ( 琉球大学大学院観光科学研究科 )  8   15 - 27   2017年02月

掲載種別: 研究論文（大学，研究機関紀要）

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The purpose of this study is to review positive and negative effects of tourism on wildlife conservation from ecological viewpoints. International tourist arrivals have increased from 527 million globally in 1995 to 1133 million in 2014. In Japanese tourism markets, a share of cultural heritages is known to be large. On the other hand, both of nature-based tourism and ecotourism have been very popular leisure activities in Europe and North America, becoming a business worth millions of dollars annually. Current lack of enthusiasm by Japanese to nature-based tourism and ecotourism suggests that Japanese tourism in this area has a potential of development. If so, it is predicted that usage frequency of natural resources will grow. Therefore, the conservation of wild animals as tourist resources is necessary. Major causes of wildlife extinction are habitat destruction and poaching. ""Tourism"" is the industry that was promoted by United Nations as one of activity to reduce environmental degradation and poverty. Most people agree that tourism create funding mechanism in order to conserve wildlife directly or indirectly. Tourism, however, changes animal behaviors and may bring their extinction, and an ecological cascade may cause extinction from one species to many species. It causes an argument that tourism has an ambiguous gain or loss in conservation of wild animals and biodiversity. This gain/loss should be cleared in the future. Although conservationists depend on tourism for conservation fund, tourists might easily reverse their decision about travel destination by many causes such as danger of war, or infection, or economic deterioration. When tourists decreased, ecological conservation becomes difficult under such circumstances. We need to understand the risk of excessive reliance. （管理者追加）リポジトリ登録情報を移行しました。確認のうえ、加除修正をしてください。

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