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

Autor: Eriksson CE; Department of Fisheries and Wildlife, Oregon State University, Corvallis, Oregon, 97331, USA., Kantek DLZ; Instituto Chico Mendes de Conservação da Biodiversidade (ICMBIO), Estação Ecológica de Taiamã (EET), Cáceres, Mato Grosso, Brazil., Miyazaki SS; Instituto Chico Mendes de Conservação da Biodiversidade (ICMBIO), Estação Ecológica de Taiamã (EET), Cáceres, Mato Grosso, Brazil., Morato RG; Instituto Chico Mendes de Conservação da Biodiversidade (ICMBIO), Centro Nacional de Pesquisa e Conservação de Mamíferos Carnívoros (CENAP), Atibaia, São Paulo, Brazil., Dos Santos-Filho M; Departamento de Ciências Biológicas, Universidade do Estado de Mato Grosso (UNEMAT), Cáceres, Mato Grosso, Brazil., Ruprecht JS; Department of Fisheries and Wildlife, Oregon State University, Corvallis, Oregon, 97331, USA., Peres CA; Centre for Ecology, Evolution and Conservation, School of Environmental Sciences, University of East Anglia, Norfolk, Norwich, NR4 7TJ, UK.; Instituto Juruá, Rua das Papoulas 97, Manaus, Brazil., Levi T; Department of Fisheries and Wildlife, Oregon State University, Corvallis, Oregon, 97331, USA.
Jazyk: angličtina
Zdroj: Ecology [Ecology] 2022 Jan; Vol. 103 (1), pp. e03543. Date of Electronic Publication: 2021 Nov 28.
DOI: 10.1002/ecy.3543
Abstrakt: 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 jaguars/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 study demonstrates that aquatic subsidies, frequently described in omnivores, can also transform the ecology and behavior of obligate carnivores.
(© 2021 by the Ecological Society of America.)
Databáze: MEDLINE
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