ArticlePrimates; journal of primatology2014
Variation in hair δ(13)C and δ (15)N values in long-tailed macaques (Macaca fascicularis) from Singapore.
Article in Primates; journal of primatology, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 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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3 citing papers in PubMed, 43 citations in OpenAlex.
- Barbary macaques show sex-related differences in body weight based on anthropogenic food exposure despite comparable female-male stable isotope ratios.Scientific reports · 2024Article
- Inter-individual variation in the diet within a group of Japanese macaques and its relationship with social structure investigated by stable isotope and DNA analyses.Primates; journal of primatology · 2021Article
- Hair cortisol and stable carbon and nitrogen isotope ratios in barbary macaques (Macaca sylvanus) from Gibraltar.Rapid communications in mass spectrometry : RCM · 2019Article
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Authors and funding
6 authors at 5 institutions in 4 countries.
Funding
Abstract
Much of the primatology literature on stable isotope ratios of carbon (δ(13)C) and nitrogen (δ(15)N) has focused on African and New World species, with comparatively little research published on Asian primates. Here we present hair δ(13)C and δ(15)N isotope values for a sample of 33 long-tailed macaques from Singapore. We evaluate the suggestion by a previous researcher that forest degradation and biodiversity loss in Singapore have led to a decline in macaque trophic level. The results of our analysis indicated significant spatial variability in δ(13)C but not δ(15)N. The range of variation in δ(13)C was consistent with a diet based on C3 resources, with one group exhibiting low values consistent with a closed canopy environment. Relative to other macaque species from Europe and Asia, the macaques from Singapore exhibited a low mean δ(13)C value but mid-range mean δ(15)N value. Previous research suggesting a decline in macaque trophic level is not supported by the results of our study.
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