98%
921
2 minutes
20
Hormone laboratories located "on-site" where field studies are being conducted have a number of advantages. On-site laboratories allow hormone analyses to proceed in near-real-time, minimize logistics of sample permits/shipping, contribute to in-country capacity-building, and (our focus here) facilitate cross-site collaboration through shared methods and a shared laboratory. Here we provide proof-of-concept that an on-site hormone laboratory (the Taboga Field Laboratory, located in the Taboga Forest Reserve, Costa Rica) can successfully run endocrine analyses in a remote location. Using fecal samples from wild white-faced capuchins (Cebus imitator) from three Costa Rican forests, we validate the extraction and analysis of four steroid hormones (glucocorticoids, testosterone, estradiol, progesterone) across six assays (DetectX® and ISWE, all from Arbor Assays). Additionally, as the first collaboration across three long-term, wild capuchin field sites (Lomas Barbudal, Santa Rosa, Taboga) involving local Costa Rican collaborators, this laboratory can serve as a future hub for collaborative exchange.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1016/j.ygcen.2022.114109 | DOI Listing |
Am J Primatol
August 2025
Department of Psychology, University of Michigan, Ann Arbor, Michigan, USA.
In stark contrast to our own highly plastic communicative abilities, nonhuman primate vocalizations were historically considered fixed and innate, with very little ability to learn or modify vocal signals. However, recent studies indicate that primate vocalizations do show evidence of developmental plasticity, most notably in their context and usage. We build on these studies by investigating developmental changes in one of the most common calls of white-faced capuchins (Cebus imitator), the twitter.
View Article and Find Full Text PDFProc Biol Sci
August 2025
Department of Anthropology, Tulane University, New Orleans, LA, USA.
Male reproductive success is determined by the interplay of female mate choice and male-male competition, often linked to dominance rank in social animals. Across taxa, elaborate ornaments, such as bright coloration or large antlers, often function as badges of status, signalling male competitive ability to rivals. In species where females mate with multiple males, post-mating sperm competition also plays an important role in male reproductive success and is associated with larger relative testes size.
View Article and Find Full Text PDFR Soc Open Sci
July 2025
Department of Anthropology, Tulane University, New Orleans, LA, USA.
Urine plays an essential role in mammalian olfactory communication, although its potential role in primates has long been overlooked owing to focus on their visual adaptations for communication. Here, we combined behavioural and chemical data to test the role of urine in signalling male dominance in white-faced capuchins (). We predicted that: (i) urine washing (i.
View Article and Find Full Text PDFbioRxiv
June 2025
Department of Anthropology and Archaeology, University of Calgary, Calgary, AB, Canada.
Understanding how the physiology of free-ranging mammals is impacted by environmental stressors is a major focus of ecological research. However, the constraints of non-invasive sampling pose serious challenges to the acquisition of physiological data from most species of primates. As a result, little is known about how the gut responds to ecological stimuli at the cellular level in wild populations.
View Article and Find Full Text PDFCurr Biol
May 2025
Department for the Ecology of Animal Societies, Max Planck Institute of Animal Behavior, 78467 Konstanz, Germany; Department of Biology, University of Konstanz, 78464 Konstanz, Germany; Center for the Advanced Study of Collective Behavior, University of Konstanz, 78464 Konstanz, Germany; Smithsonian
Cultural traditions lacking clear function are exceptionally common in humans, partially explained by our hyper-reliance on social learning. In non-human animals, it is unclear whether the same ecological and social conditions drive the emergence of both seemingly adaptive and non-adaptive traditions. Here, we describe the origins and spread of a tradition of interspecies abduction in the wild.
View Article and Find Full Text PDF