Migaku Teramoto

Kyoto University

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Toshikazu Hasegawa

The University of Tokyo

Yusuke Mori

Ryukoku University

Toshifumi Udono

Kyoto University

Naruki Morimura

Japan Wildlife Research Center

Ikuo Hayasaka

Riso Kagaku (Japan)

Nobuyuki Kutsukake

The Graduate University for Advanced Studies, SOKENDAI

Takafumi Ishida

Fukushima Medical University

Satoshi Hirata

Japan Wildlife Research Center

Koki Ikeda

Kochi University of Technology

Yumi Yamanashi

Kyoto City Zoo

Cooperative Institutions

Kyoto University

The University of Tokyo

Japan Wildlife Research Center

Institute of Primate Research

Tohoku University

Japan Society for the Promotion of Science

Nagoya University

Kumamoto University

Osaka University

Japan Science and Technology Agency

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Analysis of Gene(s) Involved in Movement of a Capillovirus

Annals of the Phytopathological Society of Japan (2001)

Migaku Teramoto Xuemei Lu Haruyuki Hirata Masashi Ugaki Satoko Namba

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Analysis of hair cortisol levels in captive chimpanzees: Effect of various methods on cortisol stability and variability

MethodsX (2016)

Yumi Yamanashi Migaku Teramoto Naruki Morimura Satoshi Hirata Juri Suzuki

Hair cortisol has been reported to be a useful measure of long-term hypothalamic-pituitary-adrenal (HPA) axis activation in several species. It serves as a practical tool for long-term stress assessment, but it is important to understand the methodological factors that can affects hair cortisol assays to avoid methodological artifacts. To that end, we tested several procedures for measuring cortisol levels in hair collected from captive chimpanzees. The results showed that reproducibility was high, and we found no differences in cortisol levels among the various storage, drying, and sampling methods. However, the fineness of homogenized hair, sample weight, and extraction time affected absolute hair cortisol concentration. Although hair cortisol levels were stable over time, factors that may influence measurement results should be kept constant throughout a study.•We modified and validated a methodology involving enzyme immunoassays to reliably measure the hair cortisol levels of captive chimpanzees.•The results revealed that the fineness of homogenized hair, sample weight, and extraction time caused variations in absolute hair cortisol concentrations in chimpanzees. In contrast, storage, drying, and sampling from similar body parts did not affect the results.

Hypothalamic–pituitary–adrenal axis

Blood sampling

10.1016/j.mex.2016.01.004

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A case of maxillary sarcoma in a chimpanzee (Pan troglodytes)

Journal of Medical Primatology (2013)

Michiko Fujisawa Toshifumi Udono Etsuko Nogami Moe Hirosawa Naruki Morimura

Abstract Oral malignancy is rare in chimpanzees. A 34‐year‐old female chimpanzee ( P an troglodytes) at Kumamoto Sanctuary, Japan, had developed it. Treatment is technically difficult for chimpanzees while malignant neoplasm is seemingly rising in captive populations. Widespread expert discussion, guidelines for treatment, especially for great apes in terminal stages is urgently needed.

Troglodytes

Pongidae

10.1111/jmp.12086

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Validation of salivary cortisol and testosterone assays in chimpanzees by liquid chromatography‐tandem mass spectrometry

American Journal of Primatology (2009)

Nobuyuki Kutsukake Koki Ikeda Seijiro Honma Migaku Teramoto Yusuke Mori

Abstract Owing to its high temporal sensitivity, saliva has distinct advantages for measuring steroids, compared with other noninvasive samples such as urine and feces. Here, we report the validity of assaying salivary cortisol (C) and testosterone (T) using liquid chromatography‐tandem mass spectrometry (LC‐MS/MS) in captive male chimpanzees, Pan troglodytes . For both the C and T concentrations, we found positive relationships between saliva and plasma. The concentrations of C and T in saliva showed clear patterns of diurnal fluctuation, whereas those in urine and feces did not. These results suggest that the salivary steroid concentrations can be regarded as good indicators of circulating steroid levels. We also developed and validated an efficient method for collecting saliva samples from cotton rope. Although rope includes inherent steroid‐like compounds and may affect the accuracy of steroid measurements, our rope‐washing procedures effectively removed intrinsic steroidal materials. There was a significant association between the C and T concentrations measured from saliva collected from rope licked by the chimpanzees and those measured from saliva collected directly from the mouth. Salivary T values estimated by LC/MS‐MS were similar to those measured by radioimmunoassay. The results indicate the usefulness of saliva as a noninvasive steroid measure and that steroids in the saliva of chimpanzees can be accurately measured by LC‐MS/MS. Am. J. Primatol. 71:696–706, 2009. © 2009 Wiley‐Liss, Inc.

10.1002/ajp.20708

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Citations (47)

Behavioral evidence of color vision deficiency in a protanomalia chimpanzee (Pan troglodytes)

Primates (2003)

Atsuko Saito Akichika Mikami Toshikazu Hasegawa Kowa Koida Kenichi Terao

Animal ecology

Troglodytes

Behavioural sciences

10.1007/s10329-002-0017-5

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Citations (23)

Long-term stress monitoring of captive chimpanzees in social housings: monitoring hair cortisol level and behaviors

Yumi Yamanashi Migaku Teramoto Naruki Morimura Satoshi Hirata Miho Inoue‐Murayama

10.3920/9789086868179_044

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[Studies on cyclic variations of human plasma testosterone levels (Part 1). Daily changes in a month].

PubMed (1986)

Kazuo Tsunoda I Takane Migaku Teramoto

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Spontaneous Object Sharing in Captive Chimpanzees (Pan troglodytes)

International Journal of Comparative Psychology (2006)

Maura L. Celli Masaki Tomonaga Toshifumi Udono Migaku Teramoto Kunitoshi Nagano

Episodes of object transfer were observed among 3 adult and 2 juvenile unrelated females chimpanzees, kept in adjacent cages with bars between them. Only the adult females had small objects available in their cage only juveniles were observed to request them. Although the possessors could easily prevent transfers, 15 episodes of active sharing were recorded, including spontaneous unsolicited donations, sharing preceded by requests, as well as transfers under obnoxious solicitation.

Troglodytes

Adult male

Positive transfer

10.46867/ijcp.2006.19.04.01

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Advantage of dichromats over trichromats in discrimination of color‐camouflaged stimuli in nonhuman primates

American Journal of Primatology (2005)

Atsuko Saito Akichika Mikami Shoji Kawamura Yoshikazu Ueno Chihiro Hiramatsu

Abstract Due to a middle‐ to long‐wavelength‐sensitive (M/LWS) cone opsin polymorphism, there is considerable phenotypic variation in the color vision of New World monkeys. Many females have trichromatic vision, whereas some females and all males have dichromatic vision. The selective pressures that maintain this polymorphism are unclear. In the present study we compared the performance of dichromats and trichromats in a discrimination task. We examined tri‐ and dichromatic individuals of two species: brown capuchin monkeys ( Cebus apella ) and long‐tailed macaques ( Macaca fascicularis ). We also examined one protanomalous chimpanzee ( Pan troglodytes ). The subjects' task was to discriminate a circular pattern from other patterns in which textural elements differed in orientation and thickness from the background. After they were trained with stimuli of a single color, the subjects were presented with color‐camouflaged stimuli with a green/red mosaic overlaid onto the pattern. The dichromatic monkeys and the protanomalous chimpanzee selected the correct stimulus under camouflaged conditions at rates significantly above chance levels, while the trichromats did not. These findings demonstrate that dichromatic nonhuman primates possess a superior visual ability to discriminate color‐camouflaged stimuli, and that such an ability may confer selective advantages with respect to the detection of cryptic foods and/or predators. Am. J. Primatol. 67:425–436, 2005. © 2005 Wiley‐Liss, Inc.

Trichromacy

Stimulus (psychology)

Color discrimination

10.1002/ajp.20197

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Citations (82)

Body, head, and facial growth: comparison between macaques (Macaca fuscata) and chimpanzee (Pan troglodytes) based on somatometry

Annals of Anatomy - Anatomischer Anzeiger (2004)

Yuzuru Hamada Toshifumi Udono Migaku Teramoto Ikuo Hayasaka

Troglodytes

10.1016/s0940-9602(04)80082-7

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Citations (10)