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Biology subjects

Morato, R. G.

Publications and source records attributed to Morato, R. G..

2 recordsLinked to original sources

Impending anthropogenic threats and protected area prioritization for the largest Neotropical apex predator in its Amazonian stronghold

Jaguars (Panthera onca) exert critical top-down control over large vertebrates across the Neotropics and have been declining due to multiple threats. Based on geospatial layers, we extracted socio-environmental variables for 447 protected areas across the Brazilian Amazon to identify protected areas that merit short-term high-priority efforts to maximize jaguar persistence. Data were analyzed using descriptive statistics, structural equations and regression modeling. Our results reveal that areas containing the largest jaguar densities and estimated population sizes are precisely those confronting most anthropogenic threats. We reveal that jaguars in the worlds largest tropical forest biome are threatened by deforestation associated with anthropogenic fires, and subsequent establishment of pastures. We provide a shortlist of protected areas that should be prioritized for short-term jaguar conservation. The future predicament of jaguar populations can only be ensured if protected areas can be proofed against downgrading and downsizing geopolitical pressures and external anthropogenic threats.

ecology↗

Extensive aquatic subsidies lead to territorial breakdown and high density of an apex predator

Energetic subsidies between terrestrial and aquatic ecosystems can strongly influence food webs and population dynamics. Our objective was to study how aquatic subsidies affected jaguar (Panthera onca) diet, sociality, and population density in a seasonally flooded protected area in the Brazilian Pantanal. The diet (n = 138 scats) was dominated by fish (46%) and aquatic reptiles (55%), representing the first jaguar population known to feed extensively on fish and to minimally consume mammals (11%). These aquatic subsidies supported the highest jaguar population density estimate to date (12.4 per 100 km2) derived from camera traps (8,065 trap nights) and GPS collars (n = 13). Contrary to their mostly solitary behavior elsewhere, we documented social interactions previously unobserved between same-sex adults including cooperative fishing, co-traveling, and play. Our research demonstrates that aquatic subsidies seen in omnivores can be highly influential to obligate carnivores leading to high population density and altered social structure.

ecology↗