Population structure of <i>Hylobates concolor</i> in Bawanglin Nature Reserve, Hainan, China

Liu, Zhenhe; Yongzu, Zhang; Jiang, Haisheng; Southwick, Charles H.

doi:10.1002/ajp.1350190406

Cited by 54 publications

(17 citation statements)

References 5 publications

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“…Gibbons were once believed to be strictly monogamous [Bleisch and Chen, 1991]; however, there have been reports of flexibility in the degree of monogamy and the temporal stability of pair bonds [Zhenhe et al, 1989;Palombit, 1994a, b;Brockelman et al, 1998;Gibbons, 1998;Jiang et al, 1999]. When given a choice, captive female gibbons appear to play a major role in selecting breeding partners [Kawakami and Kollias, 1984].…”

Section: Discussionmentioning

confidence: 99%

Longitudinal study of delayed reproductive success in a pair of white‐cheeked gibbons (Hylobates leucogenys)

et al. 2002

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Concern over a lack of breeding success in a pair of white-cheeked gibbons (Hylobates leucogenys) prompted a four-part study of gibbon behavior and physiology at the Lincoln Park Zoo. Data were collected to determine the female intermenstrual interval (IMI) and identify periods of peak receptivity. Subsequent behavioral data were gathered during both female menses and estrous periods to formulate a behavioral profile for each gibbon. The female experienced a speciestypical IMI of 21.6 days and exhibited heightened levels of behavioral receptivity toward the male during estrus. The male exhibited high levels of human-directed behavior throughout the day. Closing the exhibit to visitors did not result in higher levels of social proximity or prosocial behavior between the pair, although it did eliminate the male's human-directed behavior during the experimental condition only. The female exhibited higher levels of social grooming, solicitation of the male, and proximity to the male when the pair was locked indoors. Based on those findings, the pair was moved to an exclusively indoor exhibit. The female's visibility to the public decreased substantially in the alternate exhibit, but there were no other significant behavioral changes. Nearly one year after the exhibit change, the female gibbon was confirmed to be pregnant. Although the results of this study cannot be used to infer causal conditions that resulted in the pregnancy, they do support the notion that systematic documentation of animal behavior and physiology may be used as a tool for monitoring reproductive behavior and informing management decisions.

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Section: Discussionmentioning

confidence: 99%

Longitudinal study of delayed reproductive success in a pair of white‐cheeked gibbons (Hylobates leucogenys)

et al. 2002

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“…Gibbons are tabulated separately, as infant color varied unpredictably in some species (Table 3) (Mootnick, personal communication). In general, if the immature gibbon coat differed from the adult, it tended to resemble the mother during the infant stage (Ͻ1 year) and the father during the juvenile stage (2-4 years) (Marshall and Sugardjito, 1986;Schilling, 1984;Zhenhe et al, 1989). As a result, in gibbon species with sexual dichromatism, the female changed from adult female color to adult male color and back to dult female color during her development.…”

Section: Distribution and Development Of Natal Coatsmentioning

confidence: 99%

Primate natal coats: A preliminary analysis of distribution and function

Treves

1997

Am. J. Phys. Anthropol.

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Pelage coloration of infants was compiled for 138 species of primates. Three functional hypotheses--alloparental, infant defense, and paternity cloak--for primate natal coats are tested. Neonatal pelage contrasted with adult pelage in over half of the species examined. Subtle or inconspicuous contrast was more common than flamboyant contrast. Natal coats began to change at 5.7 weeks and disappeared by 18.0 weeks postpartum on average. The first body part to lose natal coloration was the head and/or dorsum in the majority of species. Functional analyses provided no support for the only published hypothesis--alloparental--while providing partial support for two new hypotheses--infant defense and paternity cloak. A significant association between testes weight and natal coat contrast supports a link between mating system and infant contrast. This is discussed in terms of infanticide avoidance. Natal coats are proposed to be categorically differentiated into inconspicuous and flamboyant types, not differentiated by a continuous gradation, such as color. Subspecific differentiation and patterns of shared ancestry are assessed.

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“…Hylobates concolor is observed in multiadult groups both on mainland Asia and in an isolate population on Hainan Island in the South China Sea (Haimoff et al, 1986;Zhenhe et al, 1989;Sheeran, 1993). In the Ailao and Wuliang Mountains of Yunnan Province, China, gibbon groups have been reported consisting of up to 10 individuals in size, with 1 adult male and up to 4 adult females.…”

Section: Foraging Strategiesmentioning

confidence: 99%

Hylobatid communities: Changing views on pair bonding and social organization in hominoids

Fuentes¹

2000

Am. J. Phys. Anthropol.

111

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Social organization involving pair bonding and two-adult groups is rare in mammals. Current sociobiological theory suggests that this grouping and behavior pattern is somewhat anomalous. The gibbons (genus Hylobates) are the only hominoids to exhibit pair bonds and two-adult groups. In this article I present an overview of the current issues in monogamy and pair-bond theory, and review traditional conceptualizations and the accumulated data relevant to gibbon social organization. The significance of hominoid behavioral phylogeny and population-wide studies is also considered. Recent findings indicate that pair-bonding and two-adult groups are not ubiquitous among the hylobatids. Many aspects of gibbon behavior and ecology do not conform to expectations of the conditions under which two-adult groups and/or pair-bonding patterns should evolve. A review of the information available from long-term and short-term studies of gibbons suggests an alternative way of viewing their socioecology. I propose that gibbons currently exist in variable communities that have arisen via ecological pressures and specific behavioral patterns from an ancestral multimale/multi-female grouping pattern. This social organization is not best characterized as "monogamous." This review also suggests that hominoid grouping patterns can be viewed as occurring along a continuum rather than as being discretely different units.

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Population structure of Hylobates concolor in Bawanglin Nature Reserve, Hainan, China

Cited by 54 publications

References 5 publications

Longitudinal study of delayed reproductive success in a pair of white‐cheeked gibbons (Hylobates leucogenys)

Longitudinal study of delayed reproductive success in a pair of white‐cheeked gibbons (Hylobates leucogenys)

Primate natal coats: A preliminary analysis of distribution and function

Hylobatid communities: Changing views on pair bonding and social organization in hominoids

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