Prey foraging behavior, seasonality and time-budgets in black lion tamarins, Leontopithecus chrysopygus (Mikan 1823) (Mammalia, Callitrichidae)

Keuroghlian, Alexine; Passos, Fernando C.

doi:10.1590/s1519-69842001000300015

Cited by 8 publications

(3 citation statements)

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“…Lianas are valuable fallback resources for frugivorous primates but may increase foraging effort (Dunn et al, 2012). As eclectic and opportunist omnivores (Keuroghlian & Passos, 2001), black lion tamarins are capable of shifting diet to consume low‐quality fallback food in times when preferred resources are absent. Their dietary decisions are expected to follow an optimal foraging strategy based on the complex balance between energy intake, foraging and handling time, and food distribution and availability (Lambert & Rothman, 2015).…”

Section: Discussionmentioning

confidence: 99%

Section: Sitementioning

confidence: 99%

“…Accordingly, we expected an increase in movement and a decrease in resting time to lead to higher GC levels. Since black lion tamarins also feed on arthropods and small vertebrates, we predicted an increase in prey foraging effort, linked to a lower fruit availability (Keuroghlian & Passos, 2001), to be associated with elevated GC levels. Finally, climatic variables (i.e., temperature and rainfall) may also influence resource availability and perhaps thermoregulation (Chaves et al, 2019; Touitou et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

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Linking glucocorticoid variations to monthly and daily behavior in a wild endangered neotropical primate

Kaisin

Bufalo

Amaral

et al. 2023

American J Primatol

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Identifying the factors swaying physiological stress levels in wild animals can help depict how they cope with environmental and social stressors, shedding light on their feeding ecology, behavioral plasticity, and adaptability. Here, we used noninvasive methods to explore the link between glucocorticoid levels and behavior in an endangered neotropical primate facing habitat fragmentation pressure, the black lion tamarin (Leontopithecus chrysopygus). We investigated monthly and day‐to‐day glucocorticoid variations independently to attempt to disentangle the complex nature of the adrenocortical activity. Between May 2019 to March 2020, we followed two groups of black lion tamarins in two different areas, a continuous forest and a small fragment, and gathered behavioral data (over 95 days in total; 8.6 ± 3.9 days/month) and fecal samples (Nsamples = 468; 4.93 ± 3.5 samples/day) simultaneously. Preliminary analyses enabled us to identify circadian variations linked to the biological rhythm, which were taken into account in subsequent models. Monthly analyses revealed that black lion tamarin fecal glucocorticoid metabolite levels vary according to changes in activity budget associated with the fruit consumption, movement, and resting time of the groups. At a day‐to‐day level, while intergroup encounters led to increases in fecal glucocorticoid metabolite concentrations, we found that changes in food intake or activity level did not trigger physiological stress responses. These findings suggest that diet and ranging patterns, driven by food availability and distribution, influence physiological stress at a seasonal scale, while acute stressors such as interspecific competition trigger short‐term stress responses. Exploring fecal glucocorticoid metabolite variations over different timescales can help uncover the predictive and reactive facets of physiological stress in wild species. Moreover, having a comprehensive understanding of the physiological state of species is a valuable conservation tool for evaluating how they cope in changing environments.

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Section: Discussionmentioning

confidence: 99%

Section: Sitementioning

confidence: 99%