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-perceived attractiveness influences human female preferences for sexual dimorphism and symmetry in male faces Proceedings of the Royal Society of London Series B 268 39 44

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. 242 9 15. SuàaArez, I., Bodega, G., Rudio, N., FernàaAndez, B. (1991) Sexual dimorphism in the supraoptic nucleus of the hamster. J. Anat. Lond. 178

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. Perrett 2002 Partnership status and the temporal context of relationships influence human female preferences for sexual dimorphism in male face shape Proceedings of the Royal Society

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relationships influence human female preferences for sexual dimorphism in male face shape Proceedings of the Royal Society London B 269 1095 1100

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-Voak D. M. Burt D. I. Perrett 2002 Partnership status and the temporal context of relationships influence human female preferences for sexual dimorphism

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Journal of Evolutionary Psychology
Authors:
Paul J. Fraccaro
,
Benedict C. Jones
,
Jovana Vukovic
,
Finlay G. Smith
,
Christopher D. Watkins
,
David R. Feinberg
,
Anthony C. Little
, and
Lisa M. Debruine

. , Debruine , L. M. , Law Smith , M. J. , Corrnwell , R. E. , Hillier , S. G. , Urquhart , M. & Perrett , D. I. ( 2006 , June): Maintenance of vocal sexual dimorphism: Adaptive selection against androgeny , Presentation at the 18th Annual Human

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Journal of Evolutionary Psychology
Authors:
Lisa L. M. Welling
,
Benedict C. Jones
,
Lisa M. Debruine
,
Anthony C. Little
, and
Finlay G. Smith

female preferences for sexual dimorphism and symmetry in male faces Proceedings of the Royal Society of London B 268 39 44 . A

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Sleep Spindles & Cortical Up States
Authors:
Róbert Bódizs
,
Ferenc Gombos
,
Péter P. Ujma
,
Sára Szakadát
,
Piroska Sándor
,
Péter Simor
,
Adrián Pótári
,
Boris’ Nikolai Konrad
,
Lisa Genzel
,
Axel Steiger
,
Martin Dresler
, and
Ilona Kovács

hypothesis. The sexual dimorphism in the hemispheric lateralization of sleep spindles was strikingly region-specific. In contrast to the above-discussed age-dependent increase in left hemispheric dominance of orbitofrontal/temporal fast sleep

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Biologia Futura
Authors:
Ivaylo Borislavov Iotchev
,
Anna Egerer
,
Serena Grafe
,
András Adorján
, and
Enikő Kubinyi

Introduction

The aim of this study was to explore spontaneous social interactions between dyads of unfamiliar adult dogs. Although intraspecific encounters are frequent events in the life of pet dogs, the factors that might influence encounters, such as sex, dyad composition, reproductive status, age, and state of cohabitation (keeping the dogs singly or in groups), remained unexplored.

Methods

In this study, we assigned unfamiliar, non-aggressive dogs to three types of dyads defined by sex and size. We observed their unrestrained, spontaneous behaviors in an unfamiliar dog park, where only the two dogs, the owners, and experimenter were present.

Results

We found that the dogs, on average, spent only 17% of the time (less than 1 min) in proximity. Sex, dyad composition, reproductive status, and age influenced different aspects of the interactions in dyads. Female dogs were more likely to initiate the first contact in their dyad but later approached the partner less frequently, were less likely to move apart, and displayed less scent marking. Following and moving apart were more frequent in male–male interactions. Neutered dogs spent more time following the other dog and sniffed other dogs more frequently. The time companion dogs spent in proximity and number of approaches decreased with age.

Conclusion

The study provides guidance for dog owners about the outcomes of intraspecific encounters based on the dog’s age, sex, and reproductive status, as well as the sex of the interacting partner.

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Acta Biologica Hungarica
Authors:
Lisette M. Maico
,
Annie M. Burrows
,
M. P. Mooney
,
M. I. Siegel
,
K. P. Bhatnagar
, and
T. D. Smith

Segovia, S., Guillamón, A. (1993) Sexual dimorphism in the vomeronasal pathway and sex differences in reproductive behaviors. Brain Res. Rev. 18 , 51-74. Sexual dimorphism in the vomeronasal pathway and sex differences in

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