Evolution of Hominid Life History Strategy and Origin of Human Family

Yamagiwa, Juichi

doi:10.1007/978-4-431-55480-6_11

Cited by 15 publications

(6 citation statements)

References 175 publications

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“…The social system of early humans remains unclear, but their degree of male philopatry is often considered greater than western gorillas, and possibly as extreme as the Pan species [30,32,83–85]. If so, then male philopatry could have been developing in the last common ancestor of Pan and Homo when those taxa diverged, even if it subsequently continued further in Pan (for additional possibilities, see [31,86]).…”

Section: Discussionmentioning

confidence: 99%

Mothers may shape the variations in social organization among gorillas

et al. 2016

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When mothers continue to support their offspring beyond infancy, they can influence the fitness of those offspring, the strength of social relationships within their groups, and the life-history traits of their species. Using up to 30 years of demographic data from 58 groups of gorillas in two study sites, this study extends such findings by showing that mothers may also contribute to differences in social organization between closely related species. Female mountain gorillas remained with their sons for significantly longer than western gorillas, which may explain why male philopatry and multimale groups are more common among mountain gorillas. The presence of the putative father and other familiar males did not vary significantly between species, and we found only limited support for the socio-ecological theory that the distribution of adult males is influenced by the distribution of females. Within each gorilla species, variations in those distributions may also reflect the different stages in the typical life cycle of a group. Collectively, our results highlight the potentially far-reaching consequences of maternal support that extends beyond infancy, and they illustrate the opportunity to incorporate additional factors into phylogenetic analyses of variations in social organization, including studies of human evolution.

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Section: Discussionmentioning

confidence: 99%

Mothers may shape the variations in social organization among gorillas

et al. 2016

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“…The infanticide risk hypothesis (infanticide, here, defined as an unrelated male killing a female's offspring) has received support as a primary selection pressure prompting the evolution of pair-bonding in primates (Hawkes, 2004;Opie et al, 2013;Palombit, 1999Palombit, , 2015Smuts, 1992;van Schaik & Dunbar, 1990;van Schaik & Janson, 2000). Risk of infanticide by males among primate species is one of the highest among mammalian species (Hausfater & Hrdy, 1994;Yamagiwa, 2015), thus coinciding with primates' proportionally high rates of pairbonding. Protection against infanticide by year-round association via pair-bonding is one adaptive response against the risk of infanticide (Hawkes, 2004;Opie et al, 2013;Palombit, 1999Palombit, , 2015.…”

Section: Infanticide Risk Hypothesismentioning

confidence: 99%

“…Protection against infanticide by year-round association via pair-bonding is one adaptive response against the risk of infanticide (Hawkes, 2004;Opie et al, 2013;Palombit, 1999Palombit, , 2015. The crucial factor for infanticide BARBARO -5 of avoidance as a primary selection pressure for pair-bonding in primates appears to be the slow life histories characteristic of primates (Yamagiwa, 2015). Infanticide is more likely to occur in species with slow life histories because of longer nursing times and, in particular, among species characterized by long juvenile periods and long duration of lactation relative to gestation, such as gibbons and humans, for example (Kappeler & van Schaik, 2002).…”

Section: Infanticide Risk Hypothesismentioning

confidence: 99%

“…Pair‐bonding with an investing male partner retained via effective mate guarding affords many benefits for women. It allows women to shorten lactation duration (see Quinlan & Quinlan, 2008) resulting in relatively shorter inter‐birth ratios (Shultz et al, 2014; Yamagiwa, 2015), thereby potentially increasing women's reproductive rates, and decreasing the benefits of infanticide by other males given that offspring are weaned relatively quickly (Opie et al, 2013). Women also benefit both directly and indirectly from male protection.…”

Section: The Nature Of Attachment Systemsmentioning

confidence: 99%

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The nature of attachment systems

Barbaro

2020

Social & Personality Psych

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Attachment theory is an enduring and generative framework for understanding infant and romantic relationships. As a lifespan phenomenon, attachment research has focused largely on developmental processes and how to link the infant attachments with later close relationships, but there has been comparably less scholarly attention targeted at the evolutionary origins and functionality of romantic attachments, in particular. Here, I advance a two-system approach to attachment, proposing that infant attachments and romantic attachments constitute etiologically distinct systems that evolved in response to different selection pressures, serve different evolutionary functions, and are fundamentally different in nature with regard to operation and necessity toward their respective evolutionary goals. This two-system approach has downstream implications for future attachment research, most notably with regard to how the romantic attachment system develops over the lifespan, and the extent to which romantic attachments guide the formation of relationships in adulthood. 1 | THE NATURE OF ATTACHMENT SYSTEMS Attachment theory (Bowlby, 1969, 1982) has remained an enduring and popular framework for understanding close interpersonal relationships across the lifespan, namely with parents and romantic partners (Fraley, 2019). The two primary foci of attachment theory-infant-caregiver relationships and adult romantic relationships-have received enormous empirical and theoretical attention in recent decades. There is little scholarly debate about the nature and development of infant attachment bonds. There is, however, active debate about the nature and development of adult attachments with romantic partners (see Barbaro,

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“…Por otro lado, aunque las estimaciones del gasto energético de la locomoción sin cargas pueden variar de forma notable dependiendo de los valores de la masa corporal empleados, siempre entran dentro del rango de variación de los humanos actuales. Estos resultados demuestran la importancia de la precisión en las estimaciones de la masa corporal en especies fósiles, aspecto fundamental para realizar inferencias sobre muchos otros aspectos de la paleobiología y la paleoecología de los homininos (Leonard y Snodgrass, 2007;Rodríguez-Gómez et al, 2017;Robson y Wood, 2008;Rodríguez et al, 2019;Ruff, 2002;Yamagiwa, 2015). Hasta que no aparezcan nuevos estudios que permitan reducir estos márgenes de error en las estimaciones de la masa corporal, las investigaciones de Bioenergía aplicadas al registro fósil no pueden más que reconocer esta limitación y ser precavidas en las interpretaciones de las comparaciones entre taxones.…”

Section: Limitacionesunclassified

El coste de la supervivencia en las poblaciones humanas del Pleistoceno

Cordasco¹,

Adolfo²

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Evolution of Hominid Life History Strategy and Origin of Human Family

Cited by 15 publications

References 175 publications

Mothers may shape the variations in social organization among gorillas

Mothers may shape the variations in social organization among gorillas

The nature of attachment systems

El coste de la supervivencia en las poblaciones humanas del Pleistoceno

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