Diet of some species of Neotropical small mammals

Talamoni, Sônia A.; Couto, D.; Júnior, Dirceu A. Cordeiro; Diniz, Fernanda M.

doi:10.1016/j.mambio.2007.09.008

Cited by 41 publications

(38 citation statements)

References 19 publications

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“…Montane grass mice (Akodon montensis; body mass: 37.4±3.4 g) are omnivorous cricetid rodents, but their diet consists primarily of plant material (Talamoni et al, 2008). They were captured during the rainy season between October and November 2012 in the Mata do São José (a remnant intact forest 15 km northeast of Rio Claro, São Paulo, Brazil).…”

Section: Animalsmentioning

confidence: 99%

High paracellular nutrient absorption in intact bats is associated with high paracellular permeability in perfused intestinal segments

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Gontero-Fourcade

et al. 2014

Journal of Experimental Biology

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Water-soluble nutrients are absorbed by the small intestine via transcellular and paracellular mechanisms. Based on a few previous studies, the capacity for paracellular nutrient absorption seems greater in flying mammals than in nonflying mammals, but there has been little investigation of the mechanisms driving this difference. Therefore, we studied three species each of bats (Artibeus lituratus, Sturnira lilium and Carollia perspicillata) and nonflying mammals (Akodon montensis, Mus musculus and Rattus norvegicus). Using standard pharmacokinetic techniques in intact animals, we confirmed the greater paracellular nutrient absorption in the fliers, comparing one species in each group. Then we conducted in situ intestinal perfusions on individuals of all species. In both approaches, we measured the absorption of 3OMD-glucose, a nonmetabolizable glucose analog absorbed both paracellularly and transcellularly, as well as L-arabinose, which has no mediated transport. Fractional absorption of L-arabinose was three times higher in the bat (S. lilium: 1.2±0.24) than in the rodent (A. montensis: 0.35±0.04), whereas fractional absorption of 3OMD-glucose was complete in both species (1.46±0.4 and 0.97±0.12, respectively). In agreement, bats exhibited two to 12 times higher L-arabinose clearance per square centimeter nominal surface area than rodents in intestinal perfusions. Using Larabinose, we estimated that the contribution of the paracellular pathway to total glucose absorption was higher in all three bats (109-137%) than in the rodents (13-39%). These findings contribute to an emerging picture that reliance on the paracellular pathway for nutrient absorption is much greater in bats relative to nonflying mammals and that this difference is driven by differences in intestinal permeability to nutrient-sized molecules.

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Section: Animalsmentioning

confidence: 99%

High paracellular nutrient absorption in intact bats is associated with high paracellular permeability in perfused intestinal segments

Brun

Price

Gontero-Fourcade

et al. 2014

Journal of Experimental Biology

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“…These authors concluded that, over the medium term, fire would favor plants with smaller seeds, facilitating their predation by smallbodied species such as mammals. Barlow & Peres (2003) observed a reduction in medium-and large-bodied vertebrates in burned areas, which would lead to a reduction in competition for food, favoring an increase in frugivorous-insectivorous species such as small mammals (Talamoni et al 2008).…”

Section: Discussionmentioning

confidence: 99%

Edge effects and the impact of wildfires on populations of small non-volant mammals in the forest-savanna transition zone in Southern Amazonia

et al. 2012

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Abstract:The impact of fire and edge effects on the community of small non-volant mammals was investigated in transitional Amazon forest within a matrix of soybean plantations. The animals were live trapped on 24 line transects, of which 16 were distributed in unburned areas and 8 in a burned area. A total of 11 species was recorded, including six rodents and five marsupials. The abundance and richness of small mammals appeared to decrease in burned areas, although this impact appeared to mask edge effects. In the absence of fire impacts, a positive relationship was found between mammal abundance and the distance from the forest edge. The impact of the edge effect on the diversity of small mammals appears to be influenced by the type of anthropogenic matrix and the ecological characteristics of the different species. Keywords: Cricetidae, Didelphidae, diversity, soybean matrix, experimental fire.MENDES-OLIVEIRA, A.C., SANTOS, P.G.P., CARVALHO-JÚNIOR, O., MONTAG, L.F.A., LIMA, R.C.S., MARIA, S.L.S. & ROSSI, R.V. Efeito de borda e do fogo sobre pequenos mamíferos não-voadores (Rodentia e Didelphimorphia) em uma zona de transição Floresta-Cerrado ao sul da Amazônia. Biota Neotrop. 12(3): http://www.biotaneotropica.org.br/v12n3/pt/abstract?article+bn00912032012Resumo: O efeito de borda e do fogo sobre a comunidade de pequenos mamíferos não-voadores foi investigada em uma área de transição entre Cerrado e Floresta em uma área de matriz de soja na Amazônia Oriental. Os indivíduos foram coletados em 24 transectos, dos quais 16 foram distribuídos em área sem efeito do fogo e oito distribuídos com efeito do fogo. Um total de 11 espécies foi registrado, incluindo seis roedores e cinco marsupiais. A espécie Hylaeamys megacephalus foi a mais abundante em áreas sem efeito do fogo. A abundância e riqueza de pequenos mamíferos não-voadores apresentaram uma diminuição em áreas queimadas, entretanto o efeito do fogo parece mascarar o efeito de borda nestas mesmas áreas. Em relação ao efeito de borda, sem nenhum efeito de fogo, a relação entre a abundância de pequenos mamíferos não-voadores com a distância da borda foi positiva. A relação entre a diversidade de pequenos mamíferos e efeito de borda pode ser ligada à vegetação matriz e características ecológicas de cada espécie. Palavras-chave: Cricetidae, Didelphidae, diversidade, sojicultura, fogo experimental. 58Mendes-Oliveira, A.C. et al.

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“…Estes itens foram considerados devido a sua maior importância na dieta destes animais (p. ex. Leite et al, 1996;Vieira et al, 2006;Iob e Vieira, 2008;Talamoni et al, 2008;Pinotti et al, 2011;Paglia et al, 2012). O levantamento da disponibilidade de recursos alimentares foi feito paralelamente à amostragem dos pequenos mamíferos.…”

Section: Disponibilidade De Recursos Alimentaresunclassified

Recursos Alimentares Nos Estratos Verticais E Sua Relação Com Pequenos Mamíferos Em Uma Floresta De Araucária Do Sul Do Brasil

2015

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RESUMONeste estudo, é apresentada a relação entre o uso de diferentes estratos verticais por pequenos mamíferos não voadores e a disponibilidade de recursos alimentares em uma área de Floresta de Araucária do sul do Brasil. Para tanto, foram utilizadas 150 armadilhas de captura viva instaladas no solo, sub-bosque e dossel. A disponibilidade de recursos nos estratos foi avaliada através da contagem de frutos, sementes e captura de invertebrados. Como resultados, foram registradas 10 espécies de pequenos mamíferos não voadores. Uma relação inversa foi encontrada entre as capturas de: Akodon montensis e a disponibilidade de frutos e sementes no solo (R = -0,95, P = 0,05); Juliomys sp. e a abundância de invertebrados no dossel (R = -0,96, P = 0,04); e Gracilinanus microtarsus e a disponibilidade total de alimento no dossel (R = -0,99, P = 0,008). Os resultados observados sugerem que, em períodos de escassez de alimento, os pequenos mamíferos na região da Floresta de Araucária estudada podem necessitar de mais tempo para procurar alimento, aumentando a taxa de capturas nos estratos onde estão presentes.Palavras-chave: Didelphimorphia; Ecologia Alimentar; Estratificação Vertical; Rodentia, Mamíferos Neotropicais. ABSTRACTFood resources on the vertical strata and their relationship with small mammals in an Araucaria forest of southern Brazil. This study presents the relationship between the use of different layers by non-volant small mammals and the food resources availability in an Araucaria Forest area from southern Brazil. In this sense, 150 live traps were placed on the ground, understory and canopy. The availability of resources in the layers was evaluated by counting fruits, seeds and captured invertebrates. As a result, 10 species were recorded of non-volant small mammals. An inverse relationship was found between captures of: Akodon montensis and availability of fruits and

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Diet of some species of Neotropical small mammals

Cited by 41 publications

References 19 publications

High paracellular nutrient absorption in intact bats is associated with high paracellular permeability in perfused intestinal segments

High paracellular nutrient absorption in intact bats is associated with high paracellular permeability in perfused intestinal segments

Edge effects and the impact of wildfires on populations of small non-volant mammals in the forest-savanna transition zone in Southern Amazonia

Recursos Alimentares Nos Estratos Verticais E Sua Relação Com Pequenos Mamíferos Em Uma Floresta De Araucária Do Sul Do Brasil

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