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2. Evolution of the Pygmy Phenotype: Evidence of Positive Selection from Genome-wide Scans in African, Asian, and Melanesian Pygmies

Author

Migliano, Andrea Bamberg, Romero, Irene Gallego, Metspalu, Mait, Leavesley, Matthew, Pagani, Luca, Antao, Tiago, Huang, Da-Wei, Sherman, Brad T., Siddle, Katharine, Scholes, Clarissa, Hudjashov, Georgi, Kaitokai, Elton, Babalu, Avis, Belatti, Maggie, Cagan, Alex, Hopkinshaw, Bryony, Shaw, Colin, Nelis, Mari, Metspalu, Ene, Mägi, Reedik, Lempicki, Richard A., Villems, Richard, Lahr, Marta Mirazon, and Kivisild, Toomas

Published
2013

4. Reproductive inequality in humans and other mammals

Author

Ross, Cody T, Hooper, Paul L, Smith, Jennifer E, Jaeggi, Adrian V, Smith, Eric Alden, Gavrilets, Sergey, Zohora, Fatema tuz, Ziker, John, Xygalatas, Dimitris, Wroblewski, Emily E, Wood, Brian, Winterhalder, Bruce, Willführ, Kai P, Willard, Aiyana K, Walker, Kara, von Rueden, Christopher, Voland, Eckart, Valeggia, Claudia, Vaitla, Bapu, Urlacher, Samuel, Towner, Mary, Sum, Chun-Yi, Sugiyama, Lawrence S, Strier, Karen B, Starkweather, Kathrine, Major-Smith, Daniel, Shenk, Mary, Sear, Rebecca, Seabright, Edmond, Schacht, Ryan, Scelza, Brooke, Scaggs, Shane, Salerno, Jonathan, Revilla-Minaya, Caissa, Redhead, Daniel, Pusey, Anne, Purzycki, Benjamin Grant, Power, Eleanor A, Pisor, Anne, Pettay, Jenni, Perry, Susan, Page, Abigail E, Pacheco-Cobos, Luis, Oths, Kathryn, Oh, Seung-Yun, Nolin, David, Nettle, Daniel, Moya, Cristina, Migliano, Andrea Bamberg, Mertens, Karl J, McNamara, Rita A, McElreath, Richard, Mattison, Siobhan, Massengill, Eric, Marlowe, Frank, Madimenos, Felicia, Macfarlan, Shane, Lummaa, Virpi, Lizarralde, Roberto, Liu, Ruizhe, Liebert, Melissa A, Lew-Levy, Sheina, Leslie, Paul, Lanning, Joseph, Kramer, Karen, Koster, Jeremy, Kaplan, Hillard S, Jamsranjav, Bayarsaikhan, Hurtado, A Magdalena, Hill, Kim, Hewlett, Barry, Helle, Samuli, Headland, Thomas, Headland, Janet, Gurven, Michael, Grimalda, Gianluca, Greaves, Russell, Golden, Christopher D, Godoy, Irene, Gibson, Mhairi, Mouden, Claire El, Dyble, Mark, Draper, Patricia, Downey, Sean, DeMarco, Angelina L, Davis, Helen Elizabeth, Crabtree, Stefani, Cortez, Carmen, Colleran, Heidi, Cohen, Emma, Clark, Gregory, Clark, Julia, Caudell, Mark A, Carminito, Chelsea E, Bunce, John, Boyette, Adam, Bowles, Samuel, Blumenfield, Tami, Beheim, Bret, and Beckerman, Stephen

Subjects
Contraception/Reproduction, Reproductive health and childbirth, Reduced Inequalities, Animals, Humans, Female, Male, Reproduction, Sex Characteristics, Marriage, Mammals, Sexual Behavior, Animal, egalitarian syndrome, inequality, mating systems, monogamy, reproductive skew
Abstract

To address claims of human exceptionalism, we determine where humans fit within the greater mammalian distribution of reproductive inequality. We show that humans exhibit lower reproductive skew (i.e., inequality in the number of surviving offspring) among males and smaller sex differences in reproductive skew than most other mammals, while nevertheless falling within the mammalian range. Additionally, female reproductive skew is higher in polygynous human populations than in polygynous nonhumans mammals on average. This patterning of skew can be attributed in part to the prevalence of monogamy in humans compared to the predominance of polygyny in nonhuman mammals, to the limited degree of polygyny in the human societies that practice it, and to the importance of unequally held rival resources to women's fitness. The muted reproductive inequality observed in humans appears to be linked to several unusual characteristics of our species-including high levels of cooperation among males, high dependence on unequally held rival resources, complementarities between maternal and paternal investment, as well as social and legal institutions that enforce monogamous norms.

Published
2023

7. Disentangling Immediate Adaptive Introgression from Selection on Standing Introgressed Variation in Humans

Author

Jagoda, Evelyn, Lawson, Daniel J, Wall, Jeffrey D, Lambert, David, Muller, Craig, Westaway, Michael, Leavesley, Matthew, Capellini, Terence D, Mirazón Lahr, Marta, Gerbault, Pascale, Thomas, Mark G, Migliano, Andrea Bamberg, Willerslev, Eske, Metspalu, Mait, and Pagani, Luca

Subjects
Generic health relevance, adaptive introgression, Neanderthal, positive selection, archaic genomes, interferon, toll-like receptor, Biochemistry and Cell Biology, Evolutionary Biology, Genetics
Abstract

Recent studies have reported evidence suggesting that portions of contemporary human genomes introgressed from archaic hominin populations went to high frequencies due to positive selection. However, no study to date has specifically addressed the postintrogression population dynamics of these putative cases of adaptive introgression. Here, for the first time, we specifically define cases of immediate adaptive introgression (iAI) in which archaic haplotypes rose to high frequencies in humans as a result of a selective sweep that occurred shortly after the introgression event. We define these cases as distinct from instances of selection on standing introgressed variation (SI), in which an introgressed haplotype initially segregated neutrally and subsequently underwent positive selection. Using a geographically diverse data set, we report novel cases of selection on introgressed variation in living humans and shortlist among these cases those whose selective sweeps are more consistent with having been the product of iAI rather than SI. Many of these novel inferred iAI haplotypes have potential biological relevance, including three that contain immune-related genes in West Siberians, South Asians, and West Eurasians. Overall, our results suggest that iAI may not represent the full picture of positive selection on archaically introgressed haplotypes in humans and that more work needs to be done to analyze the role of SI in the archaic introgression landscape of living humans.

Published
2018

8. Multilevel Organisation of Animal Sociality

Author

Grueter, Cyril C., Qi, Xiaoguang, Zinner, Dietmar, Bergman, Thore, Li, Ming, Xiang, Zuofu, Zhu, Pingfen, Migliano, Andrea Bamberg, Miller, Alex, Krützen, Michael, Fischer, Julia, Rubenstein, Daniel I., Vidya, T.N.C., Li, Baoguo, Cantor, Maurício, and Swedell, Larissa

Published
2020
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9. Genomic analyses inform on migration events during the peopling of Eurasia

Author

Pagani, Luca, Lawson, Daniel John, Jagoda, Evelyn, Mörseburg, Alexander, Eriksson, Anders, Mitt, Mario, Clemente, Florian, Hudjashov, Georgi, DeGiorgio, Michael, Saag, Lauri, Wall, Jeffrey D, Cardona, Alexia, Mägi, Reedik, Sayres, Melissa A Wilson, Kaewert, Sarah, Inchley, Charlotte, Scheib, Christiana L, Järve, Mari, Karmin, Monika, Jacobs, Guy S, Antao, Tiago, Iliescu, Florin Mircea, Kushniarevich, Alena, Ayub, Qasim, Tyler-Smith, Chris, Xue, Yali, Yunusbayev, Bayazit, Tambets, Kristiina, Mallick, Chandana Basu, Saag, Lehti, Pocheshkhova, Elvira, Andriadze, George, Muller, Craig, Westaway, Michael C, Lambert, David M, Zoraqi, Grigor, Turdikulova, Shahlo, Dalimova, Dilbar, Sabitov, Zhaxylyk, Sultana, Gazi Nurun Nahar, Lachance, Joseph, Tishkoff, Sarah, Momynaliev, Kuvat, Isakova, Jainagul, Damba, Larisa D, Gubina, Marina, Nymadawa, Pagbajabyn, Evseeva, Irina, Atramentova, Lubov, Utevska, Olga, Ricaut, François-Xavier, Brucato, Nicolas, Sudoyo, Herawati, Letellier, Thierry, Cox, Murray P, Barashkov, Nikolay A, Škaro, Vedrana, Mulahasanovic´, Lejla, Primorac, Dragan, Sahakyan, Hovhannes, Mormina, Maru, Eichstaedt, Christina A, Lichman, Daria V, Abdullah, Syafiq, Chaubey, Gyaneshwer, Wee, Joseph TS, Mihailov, Evelin, Karunas, Alexandra, Litvinov, Sergei, Khusainova, Rita, Ekomasova, Natalya, Akhmetova, Vita, Khidiyatova, Irina, Marjanović, Damir, Yepiskoposyan, Levon, Behar, Doron M, Balanovska, Elena, Metspalu, Andres, Derenko, Miroslava, Malyarchuk, Boris, Voevoda, Mikhail, Fedorova, Sardana A, Osipova, Ludmila P, Lahr, Marta Mirazón, Gerbault, Pascale, Leavesley, Matthew, Migliano, Andrea Bamberg, Petraglia, Michael, Balanovsky, Oleg, Khusnutdinova, Elza K, Metspalu, Ene, Thomas, Mark G, Manica, Andrea, Nielsen, Rasmus, Villems, Richard, Willerslev, Eske, Kivisild, Toomas, and Metspalu, Mait

Subjects
Human Genome, Biotechnology, Genetics, Generic health relevance, Africa, Animals, Asia, Datasets as Topic, Estonia, Europe, Fossils, Gene Flow, Genetics, Population, Genome, Human, Genomics, Heterozygote, History, Ancient, Human Migration, Humans, Native Hawaiian or Other Pacific Islander, Neanderthals, New Guinea, Population Dynamics, Racial Groups, General Science & Technology
Abstract

High-coverage whole-genome sequence studies have so far focused on a limited number of geographically restricted populations, or been targeted at specific diseases, such as cancer. Nevertheless, the availability of high-resolution genomic data has led to the development of new methodologies for inferring population history and refuelled the debate on the mutation rate in humans. Here we present the Estonian Biocentre Human Genome Diversity Panel (EGDP), a dataset of 483 high-coverage human genomes from 148 populations worldwide, including 379 new genomes from 125 populations, which we group into diversity and selection sets. We analyse this dataset to refine estimates of continent-wide patterns of heterozygosity, long- and short-distance gene flow, archaic admixture, and changes in effective population size through time as well as for signals of positive or balancing selection. We find a genetic signature in present-day Papuans that suggests that at least 2% of their genome originates from an early and largely extinct expansion of anatomically modern humans (AMHs) out of Africa. Together with evidence from the western Asian fossil record, and admixture between AMHs and Neanderthals predating the main Eurasian expansion, our results contribute to the mounting evidence for the presence of AMHs out of Africa earlier than 75,000 years ago.

Published
2016

10. A recent bottleneck of Y chromosome diversity coincides with a global change in culture

Author

Karmin, Monika, Saag, Lauri, Vicente, Mário, Sayres, Melissa A Wilson, Järve, Mari, Talas, Ulvi Gerst, Rootsi, Siiri, Ilumäe, Anne-Mai, Mägi, Reedik, Mitt, Mario, Pagani, Luca, Puurand, Tarmo, Faltyskova, Zuzana, Clemente, Florian, Cardona, Alexia, Metspalu, Ene, Sahakyan, Hovhannes, Yunusbayev, Bayazit, Hudjashov, Georgi, DeGiorgio, Michael, Loogväli, Eva-Liis, Eichstaedt, Christina, Eelmets, Mikk, Chaubey, Gyaneshwer, Tambets, Kristiina, Litvinov, Sergei, Mormina, Maru, Xue, Yali, Ayub, Qasim, Zoraqi, Grigor, Korneliussen, Thorfinn Sand, Akhatova, Farida, Lachance, Joseph, Tishkoff, Sarah, Momynaliev, Kuvat, Ricaut, François-Xavier, Kusuma, Pradiptajati, Razafindrazaka, Harilanto, Pierron, Denis, Cox, Murray P, Sultana, Gazi Nurun Nahar, Willerslev, Rane, Muller, Craig, Westaway, Michael, Lambert, David, Skaro, Vedrana, Kovačevic´, Lejla, Turdikulova, Shahlo, Dalimova, Dilbar, Khusainova, Rita, Trofimova, Natalya, Akhmetova, Vita, Khidiyatova, Irina, Lichman, Daria V, Isakova, Jainagul, Pocheshkhova, Elvira, Sabitov, Zhaxylyk, Barashkov, Nikolay A, Nymadawa, Pagbajabyn, Mihailov, Evelin, Seng, Joseph Wee Tien, Evseeva, Irina, Migliano, Andrea Bamberg, Abdullah, Syafiq, Andriadze, George, Primorac, Dragan, Atramentova, Lubov, Utevska, Olga, Yepiskoposyan, Levon, Marjanovic´, Damir, Kushniarevich, Alena, Behar, Doron M, Gilissen, Christian, Vissers, Lisenka, Veltman, Joris A, Balanovska, Elena, Derenko, Miroslava, Malyarchuk, Boris, Metspalu, Andres, Fedorova, Sardana, Eriksson, Anders, Manica, Andrea, Mendez, Fernando L, Karafet, Tatiana M, Veeramah, Krishna R, Bradman, Neil, Hammer, Michael F, Osipova, Ludmila P, Balanovsky, Oleg, Khusnutdinova, Elza K, Johnsen, Knut, Remm, Maido, Thomas, Mark G, Tyler-Smith, Chris, Underhill, Peter A, Willerslev, Eske, Nielsen, Rasmus, Metspalu, Mait, Villems, Richard, and Kivisild, Toomas

Subjects
Biological Sciences, Genetics, Human Genome, Base Sequence, Chromosomes, Human, Y, DNA, Mitochondrial, Evolution, Molecular, Genetic Variation, Genetics, Population, Haplotypes, Humans, Male, Models, Genetic, Phylogeny, Racial Groups, Sequence Analysis, DNA, Medical and Health Sciences, Bioinformatics
Abstract

It is commonly thought that human genetic diversity in non-African populations was shaped primarily by an out-of-Africa dispersal 50-100 thousand yr ago (kya). Here, we present a study of 456 geographically diverse high-coverage Y chromosome sequences, including 299 newly reported samples. Applying ancient DNA calibration, we date the Y-chromosomal most recent common ancestor (MRCA) in Africa at 254 (95% CI 192-307) kya and detect a cluster of major non-African founder haplogroups in a narrow time interval at 47-52 kya, consistent with a rapid initial colonization model of Eurasia and Oceania after the out-of-Africa bottleneck. In contrast to demographic reconstructions based on mtDNA, we infer a second strong bottleneck in Y-chromosome lineages dating to the last 10 ky. We hypothesize that this bottleneck is caused by cultural changes affecting variance of reproductive success among males.

Published
2015

17. Population interconnectivity shapes the distribution and complexity of chimpanzee cumulative culture

Author

Gunasekaram, Cassandra, primary, Kuhlwilm, Martin, additional, Battiston, Federico, additional, Fontsere, Claudia, additional, Padilla-Iglesias, Cecilia, additional, Kalan, Ammie K., additional, van Noordwiijk, Maria A., additional, Manica, Andrea, additional, Carvalho, Susana, additional, Bertranpetit, Jaume, additional, Marques-Bonet, Tomas, additional, Whiten, Andrew, additional, van Schaik, Carel, additional, Vinicius, Lucio, additional, and Migliano, Andrea Bamberg, additional

Published
2023
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19. Exploring Adaptive Phenotypes for the Human Calcium-Sensing Receptor Polymorphism R990G.

Author

Sinigaglia, Barbara, Escudero, Jorge, Biagini, Simone A, Garcia-Calleja, Jorge, Moreno, Josep, Dobon, Begoña, Acosta, Sandra, Mondal, Mayukh, Walsh, Sandra, Aguileta, Gabriela, Vallès, Mònica, Forrow, Stephen, Martin-Caballero, Juan, Migliano, Andrea Bamberg, Bertranpetit, Jaume, Muñoz, Francisco J, and Bosch, Elena

Subjects
CALCIUM-sensing receptors, HUMAN phenotype, HIGH-fat diet, NATURAL selection, RAIN forests, SHORT stature
Abstract

Rainforest hunter–gatherers from Southeast Asia are characterized by specific morphological features including a particularly dark skin color (D), short stature (S), woolly hair (W), and the presence of steatopygia (S)—fat accumulation localized in the hips (DSWS phenotype). Based on previous evidence in the Andamanese population, we first characterized signatures of adaptive natural selection around the calcium-sensing receptor gene in Southeast Asian rainforest groups presenting the DSWS phenotype and identified the R990G substitution (rs1042636) as a putative adaptive variant for experimental follow-up. Although the calcium-sensing receptor has a critical role in calcium homeostasis by directly regulating the parathyroid hormone secretion, it is expressed in different tissues and has been described to be involved in many biological functions. Previous works have also characterized the R990G substitution as an activating polymorphism of the calcium-sensing receptor associated with hypocalcemia. Therefore, we generated a knock-in mouse for this substitution and investigated organismal phenotypes that could have become adaptive in rainforest hunter–gatherers from Southeast Asia. Interestingly, we found that mouse homozygous for the derived allele show not only lower serum calcium concentration but also greater body weight and fat accumulation, probably because of enhanced preadipocyte differentiation and lipolysis impairment resulting from the calcium-sensing receptor activation mediated by R990G. We speculate that such differential features in humans could have facilitated the survival of hunter–gatherer groups during periods of nutritional stress in the challenging conditions of the Southeast Asian tropical rainforests. [ABSTRACT FROM AUTHOR]

Published
2024
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23. Agta hunter–gatherer oral microbiomes are shaped by contact network structure

Author

Musciotto, Federico, primary, Dobon, Begoña, additional, Greenacre, Michael, additional, Mira, Alex, additional, Chaudhary, Nikhil, additional, Salali, Gul Deniz, additional, Gerbault, Pascale, additional, Schlaepfer, Rodolph, additional, Astete, Leonora H., additional, Ngales, Marilyn, additional, Gomez-Gardenes, Jesus, additional, Latora, Vito, additional, Battiston, Federico, additional, Bertranpetit, Jaume, additional, Vinicius, Lucio, additional, and Migliano, Andrea Bamberg, additional

Published
2023
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24. The origins of human cumulative culture: from the foraging niche to collective intelligence

Author

Migliano, Andrea Bamberg; https://orcid.org/0000-0003-4364-2735, Vinicius, Lucio, Migliano, Andrea Bamberg; https://orcid.org/0000-0003-4364-2735, and Vinicius, Lucio

Abstract

Various studies have investigated cognitive mechanisms underlying culture in humans and other great apes. However, the adaptive reasons for the evolution of uniquely sophisticated cumulative culture in our species remain unclear. We propose that the cultural capabilities of humans are the evolutionary result of a stepwise transition from the ape-like lifestyle of earlier hominins to the foraging niche still observed in extant hunter–gatherers. Recent ethnographic, archaeological and genetic studies have provided compelling evidence that the components of the foraging niche (social egalitarianism, sexual and social division of labour, extensive co-residence and cooperation with unrelated individuals, multilocality, fluid sociality and high between-camp mobility) engendered a unique multilevel social structure where the cognitive mechanisms underlying cultural evolution (high-fidelity transmission, innovation, teaching, recombination, ratcheting) evolved as adaptations. Therefore, multilevel sociality underlies a ‘social ratchet’ or irreversible task specialization splitting the burden of cultural knowledge across individuals, which may explain why human collective intelligence is uniquely able to produce sophisticated cumulative culture. The foraging niche perspective may explain why a complex gene-culture dual inheritance system evolved uniquely in humans and interprets the cultural, morphological and genetic origins of Homo sapiens as a process of recombination of innovations appearing in differentiated but interconnected populations. This article is part of a discussion meeting issue ‘The emergence of collective knowledge and cumulative culture in animals, humans and machines’.

Published
2022

27. The making of the oral microbiome in Agta hunter-gatherers

Author

Dobon, Begona, primary, Musciotto, Federico, additional, Mira, Alex, additional, Greenacre, Michael, additional, Page, Abigail E., additional, Dyble, Mark, additional, Smith, Daniel, additional, Viguier, Sylvain, additional, Schlaepfer, Rodolph, additional, Aguileta, Gabriela, additional, Astete, Leonora H., additional, Ngales, Marilyn, additional, Latora, Vito, additional, Battiston, Federico, additional, Vinicius, Lucio, additional, Migliano, Andrea Bamberg, additional, and Bertranpetit, Jaume, additional

Published
2022
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28. Hunter-gatherer oral microbiomes are shaped by contact network structure

Author

Musciotto, Federico, primary, Dobon, Begona, additional, Greenacre, Michael, additional, Mira, Alex, additional, Page, Abigail E., additional, Dyble, Mark, additional, Viguier, Sylvain, additional, Smith, Daniel, additional, Chaudhary, Nikhil, additional, Salali, Gul Deniz, additional, Gerbault, Pascale, additional, Schlaepfer, Rodolph, additional, Astete, Leonora H., additional, Ngales, Marilyn, additional, Gomez-Gardenes, Jesus, additional, Latora, Vito, additional, Battiston, Federico, additional, Bertranpetit, Jaume, additional, Vinicius, Lucio, additional, and Migliano, Andrea Bamberg, additional

Published
2022
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31. Relatedness within and between Agta residential groups

Author

Dyble, Mark; https://orcid.org/0000-0001-6861-1631, Migliano, Andrea Bamberg, Page, Abigail E; https://orcid.org/0000-0002-0973-1569, Smith, Daniel; https://orcid.org/0000-0001-6467-2023, Dyble, Mark; https://orcid.org/0000-0001-6861-1631, Migliano, Andrea Bamberg, Page, Abigail E; https://orcid.org/0000-0002-0973-1569, and Smith, Daniel; https://orcid.org/0000-0001-6467-2023

Abstract

Theoretical models relating to the evolution of human behaviour usually make assumptions about the kinship structure of social groups. Since humans were hunter–gatherers for most of our evolutionary history, data on the composition of contemporary hunter–gatherer groups has long been used to inform these models. Although several papers have taken a broad view of hunter–gatherer social organisation, it is also useful to explore data from single populations in more depth. Here, we describe patterns of relatedness among the Palanan Agta, hunter–gatherers from the northern Philippines. Across 271 adults, mean relatedness to adults across the population is r = 0.01 and to adult campmates is r = 0.074, estimates that are similar to those seen in other hunter–gatherers. We also report the distribution of kin across camps, relatedness and age differences between spouses, and the degree of shared reproductive interest between camp mates, a measure that incorporates affinal kinship. For both this this measure (s) and standard relatedness (r), we see no major age or sex differences in the relatedness of adults to their campmates, conditions that may reduce the potential for conflicts of interest within social groups.

Published
2021

33. Multilevel Organisation of Animal Sociality

Author

Grueter, Cyril C, Qi, Xiaoguang, Zinner, Dietmar, Bergman, Thore, Li, Ming, Xiang, Zuofu, Zhu, Pingfen, Migliano, Andrea Bamberg, Miller, Alex, Krützen, Michael, Fischer, Julia, Rubenstein, Daniel I, Vidya, T N C, Li, Baoguo, Cantor, Maurício, Swedell, Larissa, University of Zurich, and Grueter, Cyril C

Subjects
10207 Department of Anthropology, 1105 Ecology, Evolution, Behavior and Systematics, Ecology, Behavior and Systematics, 300 Social sciences, sociology & anthropology, Evolution
Published
2020

36. Hunter-Gatherer Social Networks and Reproductive Success

Author

Page, Abigail E., Chaudhary, Nikhil, Viguier, Sylvain, Dyble, Mark, Thompson, James, Smith, Daniel, Salali, Gul. D., Mace, Ruth, and Migliano, Andrea Bamberg

Subjects
Adult, Aged, 80 and over, Adolescent, Science, Longevity, Social Support, Reproductive Behavior, Middle Aged, Models, Biological, Article, Young Adult, Humans, Medicine, Female, Aged
Abstract

Individuals’ centrality in their social network (who they and their social ties are connected to) has been associated with fertility, longevity, disease and information transmission in a range of taxa. Here, we present the first exploration in humans of the relationship between reproductive success and different measures of network centrality of 39 Agta and 38 BaYaka mothers. We collected three-meter contact (‘proximity’) networks and reproductive histories to test the prediction that individual centrality is positively associated with reproductive fitness (number of living offspring). Rather than direct social ties influencing reproductive success, mothers with greater indirect centrality (i.e. centrality determined by second and third degree ties) produced significantly more living offspring. However, indirect centrality is also correlated with sickness in the Agta, suggesting a trade-off. In complex social species, the optimisation of individuals’ network position has important ramifications for fitness, potentially due to easy access to different parts of the network, facilitating cooperation and social influence in unpredictable ecologies.

Published
2017
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37. The origins of human cumulative culture: from the foraging niche to collective intelligence.

Author

Migliano, Andrea Bamberg and Vinicius, Lucio

Subjects
*HUMAN origins, *HOMINIDS, *SOCIAL evolution, *ANIMAL culture, *SOCIAL structure, *SWARM intelligence
Abstract

Various studies have investigated cognitive mechanisms underlying culture in humans and other great apes. However, the adaptive reasons for the evolution of uniquely sophisticated cumulative culture in our species remain unclear. We propose that the cultural capabilities of humans are the evolutionary result of a stepwise transition from the ape-like lifestyle of earlier hominins to the foraging niche still observed in extant hunter–gatherers. Recent ethnographic, archaeological and genetic studies have provided compelling evidence that the components of the foraging niche (social egalitarianism, sexual and social division of labour, extensive co-residence and cooperation with unrelated individuals, multilocality, fluid sociality and high between-camp mobility) engendered a unique multilevel social structure where the cognitive mechanisms underlying cultural evolution (high-fidelity transmission, innovation, teaching, recombination, ratcheting) evolved as adaptations. Therefore, multilevel sociality underlies a 'social ratchet' or irreversible task specialization splitting the burden of cultural knowledge across individuals, which may explain why human collective intelligence is uniquely able to produce sophisticated cumulative culture. The foraging niche perspective may explain why a complex gene-culture dual inheritance system evolved uniquely in humans and interprets the cultural, morphological and genetic origins of Homo sapiens as a process of recombination of innovations appearing in differentiated but interconnected populations. This article is part of a discussion meeting issue 'The emergence of collective knowledge and cumulative culture in animals, humans and machines'. [ABSTRACT FROM AUTHOR]

Published
2022
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38. Testing adaptive hypotheses in Agta foragers

Author

Page, Abigail E., Thomas, Matthew, Smith, Dan, Dyble, Mark, Viguier, Sylvain, Chaudhary, Nikhil, Salali, Gul Deniz, Thompson, James, Mace, Ruth, and Migliano, Andrea Bamberg

Subjects
social sciences
Abstract

Human children are frequently cared for by non-parental caregivers (alloparents), yet few studies have conducted systematic alternative hypothesis tests of why alloparents help. Here, we explore whether predictions from kin selection, reciprocity, learning-to-mother and costly signalling hypotheses explain non-parental childcare among Agta hunter-gatherers from the Philippines. To test these hypotheses, we use high-resolution proximity data from 1,701 child alloparent dyads. Our results indicate that reciprocity and relatedness were positively associated with number of interactions with a child (our proxy for childcare). Need appeared more influential in close kin, suggesting indirect benefits, while reciprocity proved to be a stronger influence in non-kin, pointing to direct benefits. However, despite shared genes, close and distant kin interactions were also contingent on reciprocity. Compared to other apes, humans are unique in rapidly producing energetically demanding offspring. Our results suggest that the support that mothers require is met through support based on kinship and reciprocity.

Published
2019
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39. Cooperation and the evolution of hunter-gatherer storytelling

Author

Smith, Daniel, Schlaepfer, Philip, Major, Katie, Dyble, Mark, Page, Abigail E., Thompson, James, Chaudhary, Nikhil, Salali, Gul Deniz, Mace, Ruth, Astete, Leonora, Ngales, Marilyn, Vinicius, Lucio, Migliano, Andrea Bamberg, Smith, Daniel [0000-0001-6467-2023], Dyble, Mark [0000-0001-6861-1631], Page, Abigail E [0000-0002-0973-1569], Chaudhary, Nikhil [0000-0001-7528-8529], Salali, Gul Deniz [0000-0001-9538-3064], Mace, Ruth [0000-0002-6137-7739], Migliano, Andrea Bamberg [0000-0003-4364-2735], and Apollo - University of Cambridge Repository

Subjects
Adult, Male, Narration, Behavioral ECOLOGY, Adolescent, Science, Philippines, ComputingMilieux_PERSONALCOMPUTING, biological anthropology, social anthropology, Middle Aged, Biological Evolution, Article, Young Adult, Humans, Female, cultural evolution, Cooperative Behavior, GeneralLiterature_REFERENCE(e.g.,dictionaries,encyclopedias,glossaries), Aged
Abstract

Storytelling is a human universal. From gathering around the camp-fire telling tales of ancestors to watching the latest television box-set, humans are inveterate producers and consumers of stories. Despite its ubiquity, little attention has been given to understanding the function and evolution of storytelling. Here we explore the impact of storytelling on hunter-gatherer cooperative behaviour and the individual-level fitness benefits to being a skilled storyteller. Stories told by the Agta, a Filipino hunter-gatherer population, convey messages relevant to coordinating behaviour in a foraging ecology, such as cooperation, sex equality and egalitarianism. These themes are present in narratives from other foraging societies. We also show that the presence of good storytellers is associated with increased cooperation. In return, skilled storytellers are preferred social partners and have greater reproductive success, providing a pathway by which group-beneficial behaviours, such as storytelling, can evolve via individual-level selection. We conclude that one of the adaptive functions of storytelling among hunter gatherers may be to organise cooperation., Storytelling entails costs in terms of time and effort, yet it is a ubiquitous feature of human society. Here, Smith et al. show benefits of storytelling in Agta hunter-gatherer communities, as storytellers have higher reproductive success and storytelling is associated with higher cooperation in the group.

Published
2017
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40. Speech, stone tool-making and the evolution of language

Author

Cataldo, Dana Michelle, Migliano, Andrea Bamberg, and Vinicius, Lucio

Subjects
Culture, lcsh:Medicine, Social Sciences, Sociology, Paleoanthropology, Speech, Psychology, Animals, Humans, lcsh:Science, Semiotics, Language, Neanderthals, Verbal Communication, Evolutionary Linguistics, Behavior, Evolutionary Biology, Tool Use Behavior, Verbal Behavior, lcsh:R, Cognitive Psychology, Biology and Life Sciences, Paleontology, Linguistics, Communications, Organismal Evolution, Hominid Evolution, Anthropology, Earth Sciences, Cognitive Science, lcsh:Q, Physical Anthropology, Hominin Evolution, Research Article, Neuroscience
Abstract

The 'technological hypothesis' proposes that gestural language evolved in early hominins to enable the cultural transmission of stone tool-making skills, with speech appearing later in response to the complex lithic industries of more recent hominins. However, no flintknapping study has assessed the efficiency of speech alone (unassisted by gesture) as a tool-making transmission aid. Here we show that subjects instructed by speech alone underperform in stone tool-making experiments in comparison to subjects instructed through either gesture alone or 'full language' (gesture plus speech), and also report lower satisfaction with their received instruction. The results provide evidence that gesture was likely to be selected over speech as a teaching aid in the earliest hominin tool-makers; that speech could not have replaced gesturing as a tool-making teaching aid in later hominins, possibly explaining the functional retention of gesturing in the full language of modern humans; and that speech may have evolved for reasons unrelated to tool-making. We conclude that speech is unlikely to have evolved as tool-making teaching aid superior to gesture, as claimed by the technological hypothesis, and therefore alternative views should be considered. For example, gestural language may have evolved to enable tool-making in earlier hominins, while speech may have later emerged as a response to increased trade and more complex inter- and intra-group interactions in Middle Pleistocene ancestors of Neanderthals and Homo sapiens; or gesture and speech may have evolved in parallel rather than in sequence.

Published
2018

44. Competition for Cooperation: variability, benefits and heritability of relational wealth in hunter-gatherers

Author

Chaudhary, Nikhil, Salali, Gul Deniz, Thompson, James, Rey, Aude, Gerbault, Pascale, Stevenson, Edward Geoffrey Jedediah, Dyble, Mark, Page, Abigail E., Smith, Daniel, Mace, Ruth, Vinicius, Lucio, and Migliano, Andrea Bamberg

Subjects
Adult, Male, Population Groups, Humans, Female, Interpersonal Relations, Cooperative Behavior, Middle Aged, Social Behavior, Article, Body Mass Index
Abstract

Many defining human characteristics including theory of mind, culture and language relate to our sociality, and facilitate the formation and maintenance of cooperative relationships. Therefore, deciphering the context in which our sociality evolved is invaluable in understanding what makes us unique as a species. Much work has emphasised group-level competition, such as warfare, in moulding human cooperation and sociality. However, competition and cooperation also occur within groups; and inter-individual differences in sociality have reported fitness implications in numerous non-human taxa. Here we investigate whether differential access to cooperation (relational wealth) is likely to lead to variation in fitness at the individual level among BaYaka hunter-gatherers. Using economic gift games we find that relational wealth: a) displays individual-level variation; b) provides advantages in buffering food risk, and is positively associated with body mass index (BMI) and female fertility; c) is partially heritable. These results highlight that individual-level processes may have been fundamental in the extension of human cooperation beyond small units of related individuals, and in shaping our sociality. Additionally, the findings offer insight in to trends related to human sociality found from research in other fields such as psychology and epidemiology.

Published
2016
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45. Disentangling Immediate Adaptive Introgression from Selection on Standing Introgressed Variation in Humans

Author

Jagoda, Evelyn, primary, Lawson, Daniel J, additional, Wall, Jeffrey D, additional, Lambert, David, additional, Muller, Craig, additional, Westaway, Michael, additional, Leavesley, Matthew, additional, Capellini, Terence D, additional, Mirazón Lahr, Marta, additional, Gerbault, Pascale, additional, Thomas, Mark G, additional, Migliano, Andrea Bamberg, additional, Willerslev, Eske, additional, Metspalu, Mait, additional, and Pagani, Luca, additional

Published
2017
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47. Camp stability predicts patterns of hunter–gatherer cooperation

Author

Smith, Daniel, primary, Dyble, Mark, additional, Thompson, James, additional, Major, Katie, additional, Page, Abigail E., additional, Chaudhary, Nikhil, additional, Salali, Gul Deniz, additional, Vinicius, Lucio, additional, Migliano, Andrea Bamberg, additional, and Mace, Ruth, additional

Published
2016
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48. High-resolution maps of hunter-gatherer social networks reveal human adaptation for cultural exchange

Author

Migliano, Andrea Bamberg, primary, Page, Abigail, additional, Gomez-Gardenes, Jesus, additional, Viguier, Sylvain, additional, Dyble, Mark, additional, Thompson, James, additional, Chaudhary, Nikhill, additional, Salali, Gul Deniz, additional, Smith, Daniel, additional, Strods, Janis, additional, Latora, Vito, additional, Mace, Ruth, additional, and Vinicius, Lucio, additional

Published
2016
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