Activity patterns of arboreal mammals in a tropical rain forest in México

Azcárraga, Alberto Astiazarán; Gallina, Sonia; Delfín-Alfonso, Christian Alejandro

doi:10.12933/therya-20-779

Cited by 4 publications

(4 citation statements)

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“…The ability to be active across the 24‐h cycle affords increased foraging opportunities (Van Schaik & Griffiths, 1996) and the flexibility to concentrate activity during times that minimize predation or competition, and/or maximize the likelihood of encountering prey (Curtis & Rasmussen, 2006). Notably, no arboreal species displayed cathemeral activity (Table 2, Figure 2), a finding consistent with studies in Indonesia (Van Schaik & Griffiths, 1996), Brazil (Oliveira‐Santos et al, 2008), and Mexico (Azcarraga et al, 2020). Visual acuity in mammals has evolved to be optimum in either bright or dark conditions (Heesy & Hall, 2010; Veilleux & Kirk, 2014).…”

Section: Discussionsupporting

confidence: 88%

“…Figure 2), a finding consistent with studies in Indonesia (Van Schaik & Griffiths, 1996), Brazil (Oliveira-Santos et al, 2008), and Mexico (Azcarraga et al, 2020). Visual acuity in mammals has evolved to be optimum in either bright or dark conditions (Heesy & Hall, 2010;Veilleux & Kirk, 2014).…”

Section: Diel Cycles Across Stratasupporting

confidence: 88%

“…Indeed, arboreal (canopy-dwelling) taxa comprise a substantial portion of rainforest mammal communities (Emmons et al, 1983;Haysom et al, 2021;Moore et al, 2020), but most of our knowledge of these communities comes from studies of terrestrial (ground-dwelling) species, or observations of arboreal species from ground level (Whitworth et al, 2016). Consequently, the activity of many arboreal mammals, and the canopy element of semi-arboreal mammal activity, is poorly characterized (see as examples Van Schaik & Griffiths, 1996;Oliveira-Santos et al, 2008), with community-wide investigations of arboreal mammal activity particularly lacking; we could find only two such studies (Azcarraga et al, 2020;Gracanin & Mikac, 2022).…”

Section: Introductionmentioning

confidence: 99%

“…Characterizing activity in the context of these multiple influences can thus help shed light on the drivers and constraints a species or population may be subject to, while showing how sympatric species may use temporal partitioning to facilitate co‐existence (Azcarraga et al, 2020). Yet, for most wild animals, patterns of activity are poorly documented due to the difficulties of accurate quantification in non‐captive settings (Bridges & Noss, 2011; Rowcliffe et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

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Stratified activity: Vertical partitioning of the diel cycle by rainforest mammals in Borneo

Haysom,

Deere,

Mahyudin

et al. 2023

Biotropica

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Animal activity is driven by the environmental conditions and physical structure of a habitat, and the need to interact with, or avoid, other animals. Knowledge of the proportion of the 24‐hour cycle spent active (activity level), and the time/s of day in which activity is concentrated (activity pattern), informs our understanding of species' ecology and community dynamics. In multidimensional habitats such as tropical rainforests, arboreal (canopy‐dwelling) taxa comprise up to three‐quarters of vertebrate assemblages; yet, wildlife surveys are typically limited to ground level. Terrestrial‐only sampling can result in activity metrics that do not take account of species' full use of horizontal and vertical habitat space. We paired ground‐ and canopy‐level camera traps to characterize mammal activity across vertical strata in Borneo. Additionally, we sampled unlogged and recovering‐logged rainforest to evaluate whether this activity was impacted by logging. Activity across vertical strata varied substantially among 37 species. Arboreal mammals were predominantly nocturnal or diurnal but never cathemeral, terrestrial mammals were mostly nocturnal or cathemeral, and semi‐arboreal mammals appeared to fill the temporal niches under‐utilized by other groups. Differences in activity between unlogged and recovering‐logged forest were minimal, with 92% of species found in both forest types retaining the same activity pattern. Our study demonstrates that the inclusion of canopy‐based sampling provides much greater insights into overall rainforest mammal activity than terrestrial sampling alone. Our results suggest that the varying opportunities and constraints of each stratum act in concert to influence the diel patterns of tropical mammals.

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