ArticlePrimates; journal of primatology2021
For emergency only: terrestrial feeding in Coimbra-Filho's titis reflects seasonal arboreal resource availability.
Article in Primates; journal of primatology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers, 1 of them a synthesis that pooled it.
What it found
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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.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
5 citing papers in PubMed, 1 synthesis or guideline pooled it.
- The Human Shield Hypothesis: Does Predator Avoidance of Humans Create Refuges for Prey?Ecology letters · 2025Pooled it
- The basal area explains the abundance of stone tool sites reused by blonde capuchin monkeys.Scientific reports · 2025Article
- Direct links between resource availability and activity budget better reveal ecological patterns of endangered Coimbra-Filho's titi monkey.Primates; journal of primatology · 2024Article
- Factors influencing terrestriality in primates of the Americas and Madagascar.Proceedings of the National Academy of Sciences of the United States of America · 2022Article
- Fire as a driver and mediator of predator-prey interactions.Biological reviews of the Cambridge Philosophical Society · 2022Review
Corrections and comments
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Authors and funding
6 authors.
Funding
Abstract
Terrestriality in Platyrrhine primates is primarily associated with low arboreal resource availability, low predation risk when on the ground and increased contact time with human observers. To test the relationship between these variables and ground use frequency, we studied a group of endangered Coimbra-Filho's titi monkeys (Callicebus coimbrai) in a 14-ha forest fragment in north-eastern Brazil. Terrestriality data were collected on a monthly basis (33 months) using scan sampling procedures from July 2008 to July 2012. Overall, Coimbra-Filho's titi monkeys were recorded during 0.6% of observation time (113 out of 18,164 scans) on the ground. Most of the time on the ground was spent feeding on young leaves (71 records) and the least amount of time on fruits (14 records). Availability of arboreal foods, rainfall, and time of contact with human observers did not influence overall terrestrial behaviour (ground use). However, the timing and nature of the monkeys' terrestrial feeding was strongly related to the absence of arboreal fruit (β-estimate = -3.078) and young leaf (β-estimate = -3.515) food resources. We suggest that terrestrial feeding by Coimbra-Filho's titi monkeys could be an adaptation to low arboreal fruit availability and the exploitation of alternative food resources.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.