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McDonnell, S.M.; Henry,M. Bristol, F. |
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Spontaneous erection and masturbation in equids Proc 35th |
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1991 |
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J. Reprod. Fert. Suppl |
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44 |
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664-665 |
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Horse; Masturbation; Erection; Aversive conditioning; Sexual behavior; Ejaculation; Semen |
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This paper is part of the special issue entitled “Proceedings of the 4th International Symposium on Stallion Reproduction”, Guest Edited by Dr. Edward Squires. |
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1378 |
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Bannasch, D.; Rinaldo, C.; Millon, L.; Latson, K.; Spangler, T.; Hubberty, S.; Galuppo, L.; Lowenstine, L. |
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Title |
SRY negative 64,XX intersex phenotype in an American saddlebred horse |
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Journal Article |
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2007 |
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Veterinary Journal (London, England : 1997) |
Abbreviated Journal |
Vet J |
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173 |
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2 |
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437-439 |
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Animals; Female; Genitalia/abnormalities; Hermaphroditism/*veterinary; Horse Diseases/*diagnosis/genetics; Horses/*genetics/*physiology; Karyotyping; Phenotype; Sex Differentiation; Sex Differentiation Disorders/diagnosis/veterinary; Sex-Determining Region Y Protein/genetics/*metabolism |
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A female American saddlebred horse was presented for surgical correction of a possible pseudohermaphrodite condition. The horse had abnormal external genitalia and exhibited stallion-like behaviour. No evidence of uterine or ovarian tissue was identified on laparoscopic examination, but hypoplastic testicular-like tissue was removed, although this was found to contain no spermatogonia upon histopathological examination. A karyotype was performed and showed the normal chromosomal complement for a female horse (64,XX). Polymerase chain reaction to detect the SRY gene was negative in peripheral blood as well as the testicular-like tissue. This case represents the first report of an SRY negative XX-male sex reversal intersex phenotype, which is a potentially inherited condition, in an American saddlebred horse. |
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Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, Davis, CA 95616, USA. dlbannasch@ucdavis.edu |
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1090-0233 |
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PMID:16386440 |
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1882 |
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Elhay, M.; Newbold, A.; Britton, A.; Turley, P.; Dowsett, K.; Walker, J. |
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Title |
Suppression of behavioural and physiological oestrus in the mare by vaccination against GnRH |
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Journal Article |
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Year |
2007 |
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Australian Veterinary Journal |
Abbreviated Journal |
Aust Vet J |
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85 |
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1-2 |
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39-45 |
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Animals; Antibodies/blood; Estradiol/blood; *Estrus/drug effects/physiology; Female; Gonadotropin-Releasing Hormone/*immunology/*pharmacology; Horses/*physiology; Luteinizing Hormone/blood; Ovulation/*drug effects/physiology; Progesterone/blood; Safety; Sexual Behavior, Animal/drug effects/physiology; Time Factors; Vaccination/veterinary |
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OBJECTIVE: To examine the immunogenicity of an equine immunocontraceptive vaccine and its efficacy in controlling hormone-related behaviour. DESIGN: A total of 24 mares at two sites in Australia were vaccinated with an immunocontraceptive vaccine comprising gonadotrophin releasing hormone (GnRH) conjugated to a carrier protein in immunostimulating complex as an adjuvant. Twelve animals at each site received a placebo of adjuvant alone and served as controls for seasonal oestrus, hormonal and behaviour patterns. Animals were observed for injection site reactions, ovarian and follicular activity, and serum levels of antibody, 17beta-oestradiol and progesterone in the weeks following vaccination. Mares were also examined for oestrous behaviour by teasing with a stallion. RESULTS: All mares responded to vaccination. Two weeks following the second vaccination there was a peak in antibody response to GnRH that declined gradually over the following weeks. Commensurate with the elevated anti-GnRH antibody there was a marked effect on ovarian activity with a reduction in 17beta-oestradiol and progesterone levels in the 24 vaccinated mares. There was also a reduction of oestrus-related behaviour as determined by a teaser stallion. This effect lasted a minimum of 3 months and correlated with the initial level of antibody response. CONCLUSION: Following a conventional two-dose immunisation regime this commercially available equine immunocontraceptive vaccine was effective at inhibiting oestrous behaviour for at least 3 months. This vaccine has a high level of safety since there were no significant local reactions nor were there any adverse systemic responses to vaccination. |
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Veterinary Medicines Research and Development, Pfizer Animal Health, Parkville, VIC 3052. Martin.Elhay@pfizer.com |
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0005-0423 |
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PMID:17300452 |
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1831 |
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Chenoweth, P.J.; Chase, C.C.; Larsen, R.E.; Thatcher, M.-J.D.; Bivens, J.F.; Wilcox, C.J. |
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The assessment of sexual performance in young Bos taurus and Bos indicus beef bulls |
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Journal Article |
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1996 |
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Applied Animal Behaviour Science |
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Appl. Anim. Behav. Sci. |
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48 |
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3-4 |
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225-235 |
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Bos indicus; Sex behavior; Cattle reproduction; Mating behavior; Tests |
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Yearling beef bulls, representing different Bos indicus and Bos taurus breeds, were given two sexual performance assessments (libido score, number of services, time to first mount and time of sexual inactivity) at four test periods (January, April, July and October) in 1991 (Trial 1) and 1992 (Trial 2) at the Subtropical Agricultural Research Station, Brooksville, Florida. Breed and test period, as well as their interactions, influenced most results. Sexual performance assessments generally improved with age in Bos taurus breeds, but not in Bos indicus. The temperate Bos taurus breeds (Angus and Hereford) were most sexually active, the tropically adapted Bos taurus breeds (Senepol and Romosinuano) intermediate and the two Bos indicus breeds (Brahman and Nellore x Brahman) were least active. Service rates were generally low. Seasonal patterns in sexual performance were not apparent, with breed and year differences occurring. Although breeds showed consistent test results, the failure of Bos indicus bulls to service in any test, indicates either sexual immaturity, or inadequate procedures for assessment of sexual performance in this breed group. |
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refbase @ user @ |
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2865 |
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Author |
de Waal, F.B. |
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Title |
The end of nature versus nurture |
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Journal Article |
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Year |
1999 |
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Scientific American |
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Sci Am |
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281 |
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6 |
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94-99 |
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Animals; *Behavior; Behavior, Animal; Ecology; *Environment; Ethology; Evolution; Female; *Genetics; Humans; Instinct; Learning; Male; Sex Characteristics; Twin Studies |
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Living Links Center, Yerkes Regional Primate Research Center, Atlanta, USA |
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0036-8733 |
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PMID:10614071 |
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refbase @ user @ |
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192 |
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Author |
Jacobs, A.; Maumy, M.; Petit, O. |
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Title |
The influence of social organisation on leadership in brown lemurs (Eulemur fulvus fulvus) in a controlled environment |
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Journal Article |
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Year |
2008 |
Publication |
Behavioural Processes |
Abbreviated Journal |
Behav. Process. |
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Volume |
79 |
Issue |
2 |
Pages |
111-113 |
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Animals; *Decision Making; Dominance-Subordination; *Exploratory Behavior; Female; Group Structure; *Leadership; Lemur/*psychology; Male; Sex Factors; *Social Environment |
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Studies on leadership during group movements in several lemur species showed that females were responsible for the travelling choices concerning time and direction. Interestingly, in these species females are dominant over males. We investigated the influence of social organisation upon leadership processes by studying a lemur species in which social organisation is characterized by the absence of female dominance: the brown lemur (Eulemur fulvus fulvus). The study was conducted on a semi-free ranging group of 11 individuals and the analysis performed on 69 group movements showed that all the individuals could initiate a group movement. In 34 cases, the whole group moved. There was no significant difference in the number of start attempts or in the number of group members involved from one initiator to another. Moreover, there was no effect of sex or age of the initiator on the number of individuals following it or on the speed of the joining process. Therefore, the leadership observed is widely distributed to all group members. These results support the hypothesis of an influence of social organisation upon the decision-making processes but still remain to be studied in a more relevant ecological context. |
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IPHC-DEPE, Equipe d'ethologie des primates, UMR 7178, Centre National de la Recherche Scientifique-Universite Louis Pasteur and Centre de Primatologie, Strasbourg, France |
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0376-6357 |
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PMID:18586413 |
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no |
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Equine Behaviour @ team @ |
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5127 |
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de Waal, F.B.M.; Dindo, M.; Freeman, C.A.; Hall, M.J. |
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Title |
The monkey in the mirror: hardly a stranger |
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Journal Article |
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Year |
2005 |
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Proceedings of the National Academy of Sciences of the United States of America |
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Proc. Natl. Acad. Sci. U.S.A. |
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102 |
Issue |
32 |
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11140-11147 |
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Analysis of Variance; Animals; Cebus/*physiology; *Discrimination (Psychology); Empathy; Female; Male; Observation; *Recognition (Psychology); *Self Concept; Sex Factors |
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It is widely assumed that monkeys see a stranger in the mirror, whereas apes and humans recognize themselves. In this study, we question the former assumption by using a detailed comparison of how monkeys respond to mirrors versus live individuals. Eight adult female and six adult male brown capuchin monkeys (Cebus apella) were exposed twice to three conditions: (i) a familiar same-sex partner, (ii) an unfamiliar same-sex partner, and (iii) a mirror. Females showed more eye contact and friendly behavior and fewer signs of anxiety in front of a mirror than they did when exposed to an unfamiliar partner. Males showed greater ambiguity, but they too reacted differently to mirrors and strangers. Discrimination between conditions was immediate, and blind coders were able to tell the difference between monkeys under the three conditions. Capuchins thus seem to recognize their reflection in the mirror as special, and they may not confuse it with an actual conspecific. Possibly, they reach a level of self-other distinction intermediate between seeing their mirror image as other and recognizing it as self. |
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Living Links Center, Emory University, Atlanta, GA 30322, USA. dewaal@emory.edu |
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0027-8424 |
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PMID:16055557 |
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refbase @ user @ |
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164 |
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Author |
Brennan, P.A. |
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The nose knows who's who: chemosensory individuality and mate recognition in mice |
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Journal Article |
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Year |
2004 |
Publication |
Hormones and Behavior |
Abbreviated Journal |
Horm Behav |
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46 |
Issue |
3 |
Pages |
231-240 |
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Animals; Chemoreceptors/physiology; Discrimination Learning/*physiology; Embryo Implantation/physiology; Female; Individuality; Major Histocompatibility Complex/physiology; Male; Mice; Neurons, Afferent/physiology; Nose/cytology/physiology; Perception/physiology; Pregnancy; Pregnancy Maintenance/physiology; Pregnancy, Animal/*physiology; Receptors, Odorant/*physiology; Recognition (Psychology)/*physiology; Sexual Behavior, Animal/*physiology; Smell/*physiology; Urine/physiology; Vomeronasal Organ/cytology/physiology |
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Individual recognition is an important component of behaviors, such as mate choice and maternal bonding that are vital for reproductive success. This article highlights recent developments in our understanding of the chemosensory cues and the neural pathways involved in individuality discrimination in rodents. There appear to be several types of chemosensory signal of individuality that are influenced by the highly polymorphic families of major histocompatibility complex (MHC) proteins or major urinary proteins (MUPs). Both have the capability of binding small molecules and may influence the individual profile of these chemosignals in biological fluids such as urine, skin secretions, or saliva. Moreover, these proteins, or peptides associated with them, can be taken up into the vomeronasal organ (VNO) where they can potentially interact directly with the vomeronasal receptors. This is particularly interesting given the expression of major histocompatibility complex Ib proteins by the V2R class of vomeronasal receptor and the highly selective responses of accessory olfactory bulb (AOB) mitral cells to strain identity. These findings are consistent with the role of the vomeronasal system in mediating individual discrimination that allows mate recognition in the context of the pregnancy block effect. This is hypothesized to involve a selective increase in the inhibitory control of mitral cells in the accessory olfactory bulb at the first level of processing of the vomeronasal stimulus. |
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Sub-Department of Animal Behaviour, University of Cambridge, Madingley, Cambridge CB3 8AA, UK. pab23@cus.cam.ac.uk |
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0018-506X |
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PMID:15325224 |
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Equine Behaviour @ team @ |
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4191 |
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Author |
de Waal, F.B. |
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Title |
The organization of agonistic relations within two captive groups of Java-monkeys (Macaca fascicularis) |
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Journal Article |
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Year |
1977 |
Publication |
Zeitschrift für Tierpsychologie |
Abbreviated Journal |
Z. Tierpsychol. |
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44 |
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3 |
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225-282 |
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Age Factors; Aggression; Animals; Behavior, Animal/*physiology; Competitive Behavior/*physiology; Fear; Female; Haplorhini; Humans; Macaca/*physiology; Macaca fascicularis/*physiology; Male; Sex Factors; Social Behavior; Social Dominance |
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The paper offers a detailed quantitative descripition of the distribution of agonistic activities over the members of two groups of Java-monkeys (Macaca fascicularis). These groups lived in captivity and were well-established: i.e. they had an extensive network of genealogical relationships. The study pays special attention to agonistic interactions with three or more participants. Its main purpose is an analysis of the way dyadic agonistic relations (e.g. dominance relations) are affected by third group members and the relations among these. The paper presents data on the ontogeny of 'dependent dominance', the 'control role' of the alpha-male, and the functions of different types of alliances. |
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0044-3573 |
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PMID:412345 |
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213 |
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Author |
Parish, A.R.; De Waal, F.B. |
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The other “closest living relative”. How bonobos (Pan paniscus) challenge traditional assumptions about females, dominance, intra- and intersexual interactions, and hominid evolution |
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Journal Article |
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Year |
2000 |
Publication |
Annals of the New York Academy of Sciences |
Abbreviated Journal |
Ann N Y Acad Sci |
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907 |
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97-113 |
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Animals; *Evolution; Female; Hominidae/*physiology; Humans; *Interpersonal Relations; Male; Pan paniscus/*physiology; Sexual Behavior, Animal/*physiology |
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Chimpanzee (Pan troglodytes) societies are typically characterized as physically aggressive, male-bonded and male-dominated. Their close relatives, the bonobos (Pan paniscus), differ in startling and significant ways. For instance, female bonobos bond with one another, form coalitions, and dominate males. A pattern of reluctance to consider, let alone acknowledge, female dominance in bonobos exists, however. Because both species are equally “man's” closest relative, the bonobo social system complicates models of human evolution that have historically been based upon referents that are male and chimpanzee-like. The bonobo evidence suggests that models of human evolution must be reformulated such that they also accommodate: real and meaningful female bonds; the possibility of systematic female dominance over males; female mating strategies which encompass extra-group paternities; hunting and meat distribution by females; the importance of the sharing of plant foods; affinitive inter-community interactions; males that do not stalk and attack and are not territorial; and flexible social relationships in which philopatry does not necessarily predict bonding pattern. |
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Department of Anthropology, University College London, England |
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0077-8923 |
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PMID:10818623 |
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refbase @ user @ |
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189 |
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