Primates

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Weitere Versuche zum Manipulier- und Werkzeug-verhalten junger Orang-Utans
Primates - Tập 18 - Trang 531-543 - 1977
Jürgen Lethmate
Zwei junge Orang-Utans ♂♂ wurden mit Aufgaben konfrontiert, in denen an 4 Behältern verschiedene Riegelmechanismen entfernt und dadurch die Behältertüren geöffnet werden konnten. In einer 1. Versuchsserie mit den leeren Behältern lösten die Vt von 12 Aufgaben, die sich durch die Anzahl der Riegelmechanismen unterschieden, sechs bzw. acht. Dabei zeigten die Vt zahlreiche Manipulationen, die zum Öff...... hiện toàn bộ
The growth pattern of chimpanzees: Somatic growth and reproductive maturation inPan troglodytes
Primates - Tập 37 - Trang 279-295 - 1996
Yuzuru Hamada, Toshifumi Udono, Migaku Teramoto, Tsutomu Sugawara
Growth of chimpanzees reared at the Kumamoto Primates Park of Sanwa Kagaku Kenkyusho Co. Ltd. was studied cross-sectionally from the viewpoints of somatic growth and reproductive maturation. Distance and velocity curves were expressed using spline function method. Males showed adolescent growth acceleration in body weight, with a peak at 7.86 yrs of age, but not in trunk length. Females showed con...... hiện toàn bộ
Sex differences and social organization in free-ranging spider monkeys (Ateles geoffroyi)
Primates - Tập 25 - Trang 279-294 - 1984
Linda Marie Fedigan, Margaret Joan Baxter
Several aspects of the social system of spider monkeys remain poorly understood in spite of previous studies of their behavior. Our work investigates sex differences of adultAteles geoffroyi to develop a better understanding of their social organization. A six-month field study of this species in Guatemala showed that adult males were both more aggressive and more socially cohesive than females, a...... hiện toàn bộ
Age changes of the carpal bones in macaques: Application of the fourier analysis on the radiographs
Primates - Tập 25 - Trang 485-506 - 1984
Yuzuru Hamada
A method based on the Fourier analysis is proposed, which describes and analyzes the contour morphology of carpal bones by separating morphology into factors of shape and size. Here, “size” refers to the average diameter of the contour. The “shape” is expressed byshape factors which are derived from the Fourier series and the “shape” of a monkey is expressed by ashape index which is calculated fro...... hiện toàn bộ
Grouping of the wild spider monkey
Primates - Tập 20 Số 4 - Trang 503-512 - 1979
Izawa, Kosei, Kimura, Koshin, Nieto, Alejandro Samper
Ateles generally lives in small temporary subgroups. The authors studied the grouping of the monkey for two months and obtained data concerning the subgroup size, composition, and inter-individual relationships. In general, the data agreed with that obtained byKlein (1972). However, they discovered that large subgroups of the monkey were observed only in relation to the utilization of a special pl...... hiện toàn bộ
Variation in gaze-following between two Asian colobine monkeys
Primates - Tập 58 - Trang 525-534 - 2017
Tao Chen, Jie Gao, Jingzhi Tan, Ruoting Tao, Yanjie Su
Gaze-following is a basic cognitive ability found in numerous primate and nonprimate species. However, little is known about this ability and its variation in colobine monkeys. We compared gaze-following of two Asian colobines—François’ langurs (Trachypithecus francoisi) and golden snub-nosed monkeys (Rhinopithecus roxellana). Although both species live in small polygynous family units, units of t...... hiện toàn bộ
Matrilineal rank Inheritance varies with absolute rank in Japanese macaques
Primates - Tập 41 - Trang 321-335 - 2000
Nobuyuki Kutsukake
In many cercopithecine primates, females form linear dominance hierarchies based on kinship. It is known that female rank follows the rules of matrilineal rank inheritance (MIR): (1) maternal rank inheritance, (2) maternal dominance, and (3) youngest ascendancy among sisters. Although, several determining such variation remain largely unknown. In this paper, I investigate the dominance relation-sh...... hiện toàn bộ
Book reviews
Primates - - 1989
J. Kitahara-Frisch, Michael A. Huffman
Changes in social behavior following bilateral removal of the posterior parts of the superior temporal gyri in Japanese monkeys
Primates - Tập 7 - Trang 1-20 - 1966
Itsuo Kawai
Distribution of U5 antigen on lymphocyte subsets in human and nonhuman primates
Primates - Tập 38 - Trang 185-192 - 1997
Sayuri Ikura, Keiji Terao, Osamu Takenaka, Atsuo Noguchi, Yuichi Murayama
The U5 monoclonal antibody developed by immunizing mice with Japanese monkey lymphocytes could react with lymphocytes of primate species including Old World monkeys, apes, and human. However, the distributions of U5 antigen on major functional subsets of lymphocytes were different in primate species. The U5 antigen was mainly distributed on natural killer (NK) cells in human, but on B cells in Old...... hiện toàn bộ
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