Search results for: Kenji Onishi

Items from 1 to 9 out of 9 results

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Daytime spatial relationships in a family group of black rhinoceros Diceros bicornis at the Hiroshima City Asa Zoological Park, Japan

Masayuki Nakamichi, Miho Saito, Yu Kaigaishi, Kenji Onishi

Although black rhinoceros Diceros bicornis are mostly solitary in the wild, the Hiroshima City Asa Zoological Park (Asa Zoo) has kept a family group together during the daytime, with good reproductive performance over five decades. Management procedures at the zoo include temporary single housing of the mother before and after giving birth, which facilitates maintenance of a compatible family group...

article

Diet‐related factors strongly shaped the gut microbiota of Japanese macaques

Wanyi Lee, Takashi Hayakawa, Mieko Kiyono, Naoto Yamabata, more

American Journal of Primatology > 85 > 12 > n/a - n/a

Although knowledge of the functions of the gut microbiome has increased greatly over the past few decades, our understanding of the mechanisms governing its ecology and evolution remains obscure. While host genetic distance is a strong predictor of the gut microbiome in large‐scale studies and captive settings, its influence has not always been evident at finer taxonomic scales, especially when considering...

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Twelve‐year proximity relationships in a captive group of western lowland gorillas (Gorilla gorilla gorilla) at the San Diego Wild Animal Park, California, USA

Masayuki Nakamichi, Kenji Onishi, April Silldorf, Peggy Sexton

Zoo Biology > 33 > 3 > 173 - 183

Proximity data were collected in a captive breeding group of gorillas (Gorilla gorilla gorilla) at the San Diego Wild Animal Park (currently called the San Diego Zoo Safari Park) twice a year (spring and fall periods) for over 12 years, by using a convenient method in which individuals less than 5 m from each animal in the group were recorded by scan sampling, approximately once per hour. Immature...

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Grooming-related feeding motivates macaques to groom and affects grooming reciprocity and episode duration in Japanese macaques (Macaca fuscata)

Kenji Onishi, Kazunori Yamada, Masayuki Nakamichi

Behavioural Processes > 2013 > 92 > Complete > 125-130

Allogrooming is considered as an altruistic behavior wherein primates exchange grooming as a tradable commodity for reciprocal grooming or other commodities such as support during aggression and tolerance during co-feeding. First, we report a case of the grooming relationships of the lowest-ranking adult female in a group of Japanese macaques (Macaca fuscata). The female (Lp) had lost a portion of...

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Maternal Infant Monitoring in a Free-ranging Group of Japanese Macaques (Macaca fuscata)

Kenji Onishi, Masayuki Nakamichi

International Journal of Primatology > 2011 > 32 > 1 > 209-222

In nonhuman primates, females with infants visually monitor their infants from a distance to detect and consequently avoid potential threats to their infants. We recorded maternal visual monitoring of infants (infant monitoring) ages 7–18 wk in a free-ranging, provisioned group of Japanese macaques (Macaca fuscata). The infant monitoring rate declined as a function of infants’ ages in weeks and increased...

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Old grandmothers provide essential care to their young granddaughters in a free-ranging group of Japanese monkeys (Macaca fuscata)

Masayuki Nakamichi, Kenji Onishi, Kazunori Yamada

Primates > 2010 > 51 > 2 > 171-174

This study reports 2 cases in which old grandmothers without dependent offspring provided essential care to their young granddaughters in a free-ranging group of Japanese monkeys (Macaca fuscata). In the first case, a 24-year-old grandmother provided essential care for the survival of her 2-month-old granddaughter for at least 6 days during which the mother had temporarily disappeared from the group...

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Temperature dependency in gel forming characteristic of washed meat from underutilized fatty fish escolar Lepidocybium flavobrunneum and oilfish Ruvettus pretiosus

Janista Pattaravivat, Katsuji Morioka, Kenji Onishi, Shuzo Komiyama, more

Fisheries Science > 2008 > 74 > 6 > 1366-1368

article

Changes in left anterior descending coronary artery flow profiles after coronary artery bypass grafting examined by means of transthoracic Doppler echocardiography

Masao Yoshitatsu, Yuji Miyamoto, Masataka Mitsuno, Koichi Toda, more

The Journal of Thoracic and Cardiovascular Surgery > 2003 > 126 > 5 > 1531-1536

article

Noninvasive assessment of internal thoracic artery graft patency by evaluating left anterior descending flow with a new transthoracic ultrasound technology

Masao Yoshitatsu, Yuji Miyamoto, Koichi Toda, Shinya Fukui, more

Journal of the American College of Cardiology > 2002 > 39 > S2 > 319

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