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18 February 2021 Protected areas and unpaved roads mediate habitat use of the giant anteater in anthropogenic landscapes
Natalia F. Versiani, Larissa L. Bailey, Nielson Pasqualotto, Thiago F. Rodrigues, Roberta M. Paolino, Vinicius Alberici, Adriano G. Chiarello
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Abstract

The drastic reduction of the Brazilian Cerrado has transformed this savanna hotspot into vast swaths of commodity-based agriculture fields, mainly soybean, sugarcane, and beef-production pasturelands. The resulting habitat loss and fragmentation are the principal factors underlying population decline of native species inhabiting the Cerrado, particularly those with a high demand for space, low population density, and specialized diet, such as the endangered giant anteater (Myrmecophaga tridactyla). Although the species has been studied in protected areas, we know much less about its ability to endure in disturbed landscapes. Here, we analyzed camera-trapping data to estimate a proxy of habitat use (fi01_802.gif; occupancy) and detection probabilities of the giant anteater, identifying environmental covariates influencing these parameters in landscapes with intensive agriculture and commercial forestry. We found this species using about half of the study area (model average ψfi01_802.gif = 0.51, CI = 0.40–0.62), with two predictors strongly influencing habitat use: protected areas and unpaved roads. In turn, detection probability correlates positively with area of open Cerrado and negatively with area of settlements. The species is more likely to use unpaved roads inside protected areas (fi01_802.gif = 0.90, CI = 0.47–0.75), compared to off road sites in the surrounding areas (fi01_802.gif = 0.19, CI = 0.10–0.34). Our findings indicate that giant anteaters are dependent on nature reserves and native vegetation areas existing on private properties, whose protection is regulated by the Brazilian Native Vegetation Protection Law. Given the relative paucity of state-owned protected areas in the Brazilian Cerrado, increasing the adherence of rural owners to this law is, therefore, key for the conservation of the giant anteater. The intense use of unpaved roads might reflect travelling and/or foraging optimization, a behavioral response that, nevertheless, may compound this species' susceptibility to suffer mortality from roadkill.

© The Author(s) 2021. Published by Oxford University Press on behalf of the American Society of Mammalogists, www.mammalogy.org.
Natalia F. Versiani, Larissa L. Bailey, Nielson Pasqualotto, Thiago F. Rodrigues, Roberta M. Paolino, Vinicius Alberici, and Adriano G. Chiarello "Protected areas and unpaved roads mediate habitat use of the giant anteater in anthropogenic landscapes," Journal of Mammalogy 102(3), 802-813, (18 February 2021). https://doi.org/10.1093/jmammal/gyab004
Received: 23 June 2020; Accepted: 9 January 2021; Published: 18 February 2021
KEYWORDS
Camera trap
Cerrado
Myrmecophaga tridactyla
occupancy
Pilosa
protected areas
Xenarthra
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