ArticleRoyal Society open science2015
Proximate causes of the red face of the bald uakari monkey (Cacajao calvus).
Article in Royal Society open science, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
8 citing papers in PubMed, 17 citations in OpenAlex.
- Zoonotic and Anthroponotic Plasmodium spp. Circulation between Wild Primates and Indigenous Community, Peruvian Amazon, 2007-2020.Emerging infectious diseases · 2026Article
- Sexual Signaling and Sociosexual Behaviors in Relation to Rank, Parasites, Hormones, and Age in Male Vervet Monkeys (Chlorocebus pygerythrus) in Uganda.American journal of primatology · 2025Article
- Whole genomes of Amazonian uakari monkeys reveal complex connectivity and fast differentiation driven by high environmental dynamism.Communications biology · 2024Article
- Facial and genital color ornamentation, testosterone, and reproductive output in high-ranking male rhesus macaques.Scientific reports · 2024Article
- Review
- Article
- Medium/Long wavelength sensitive opsin diversity in Pitheciidae.Scientific reports · 2017Article
- Highly polymorphic colour vision in a New World monkey with red facial skin, the bald uakari (Cacajao calvus).Proceedings. Biological sciences · 2016Article
Corrections and comments
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Authors and funding
6 authors at 4 institutions in 4 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
In social species, such as primates, facial appearances transmit a variety of social signals. Although it is suggested that the intense red colour of the face of the bald uakari monkey might be an indicator of health, this hypothesis still has not been verified. This study describes the histological structure of the skin of the face in the bald uakari, compared with other non-red neotropical primates, to better understand the maintenance of its colour. The facial skin of the bald uakari monkey is characterized by a thinner epidermis, absence of melanin pigments and a high density of vascular capillaries that spread below the epidermis. These vascular capillaries are larger and more tortuous than in other neotropical primates. The skin of the face of the bald uakari monkey allows a direct external assessment of haematological status, suggesting that the colour of the face would be an honest indicator of health, but could also signal sexual or behavioural states.
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