Diet of three didelphid marsupials (Mammalia, Didelphimorphia) in southern Brazil

Cáceres, Nilton C.

doi:10.1078/1616-5047-00165

Cited by 45 publications

(59 citation statements)

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“…Despite the diet of M. nudicaudatus be more insectivore (SANTORI et al 1995a, CÁCERES 2004, its caecum had a long relative dimension, though less complex (and smaller in volume; personal observation) than that of C. lanatus (SANTORI et al 2004). This could be related to the absorption of water and electrolytes, as hypothesized for insectivorous mammals ( ANDER- SON et al 1992).…”

Section: Discussionmentioning

confidence: 99%

“…The grey four-eyed opossum, P. frenatus, differently of the expected based on its more carnivorous diet (SANTORI et al 1995b, 2004, CÁCERES 2004, did not show significant differences in the stomach chamber size among other opossum species. According to HILDBRAND (1995), specialized carnivorous animals tend to have big and elastic stomachs to eat and temporarily store large quantities of meat in each meal.…”

Section: Raw Datamentioning

confidence: 99%

“…Even the more carnivorousomnivorous marsupial Lutreolina crassicaudata has a relatively developed caecum when compared to other carnivorous marsupials (SANTORI et al 2004, VIEIRA & ASTÚA DE MORAES 2004. Material plant such as fruits could be ingested since the first months of young opossums after their independence of the mother (CÁCERES 2002(CÁCERES , 2004. Furthermore, plant-eaters herbivorous or folivorous will have greater caeca for microbial fermentation than those frugivorous animals (CROWE & HUME 1997), which will have larger caeca than more carnivorous marsupials.…”

Section: Raw Datamentioning

confidence: 99%

“…Among them, didelphids have the most wide distribution of species in the Neotropical region, many of them ranging from Mexico to Argentina. Didelphid marsupials occupy a variety of habitats, such as the tropical, submontane and montane forests, the arboreal, terrestrial and aquatic environment (EMMONS & FEER 1997) and present a continuum of feeding habits, from those species deeply omnivore to those more frugivore, insectivore or carnivore (LEITE et al 1994, SANTORI et al 1995a, CÁCERES 2004, SANTORI et al 2004, VIEIRA & ASTÚA DE MORAES 2004.…”

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Comparative lengths of digestive tracts of seven didelphid marsupials (Mammalia) in relation to diet

Cáceres

2005

Rev. Bras. Zool.

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The relative proportions of the digestive tract were rarely explored to understand the behaviour and the ecology of neotropical marsupials. In this study, proportions of the digestive tract and diet were compared in seven opossum species. The animals studied were Didelphis albiventris Lund, 1840, D. aurita Wied-Neuwied, 1826, Metachirus nudicaudatus (Desmarest, 1817), Philander frenatus (Olfers, 1818), Lutreolina crassicaudata Desmarest, 1804, Monodelphis sorex (Hensel, 1872) and Caluromys lanatus (Olfers, 1818). Segments of digestive tracts of marsupials were measured and differences were statistically tested by Analysis of Variance and Covariance. Caecum and hard guts were responsible for the main differences among opossums, although all segments differed significantly. Caluromys lanatus was the most specialised species, with a large hard gut and caecum, small stomach and shorter small gut. The large caecum of M. nudicaudatus and the shortest hard gut of M. sorex were also noticed. The arboreal C. lanatus has a well different feeding habit and life style regarding other marsupials studied, such as M. sorex and M. nudicaudatus which are terrestrial, corroborating the results reached.

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Section: Discussionmentioning

confidence: 99%

Section: Raw Datamentioning

confidence: 99%

Section: Raw Datamentioning

confidence: 99%

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Comparative lengths of digestive tracts of seven didelphid marsupials (Mammalia) in relation to diet

Cáceres

2005

Rev. Bras. Zool.

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“…Embora existam, características ecológicas como uso diferenciado de estratos e diferentes dietas que permitiriam a não sobreposição dos nichos (Cáceres, 2004;Vieira & Camargo, 2012), existem evidências de que essas espécies podem apresentar competição interespecífica (Cerqueira, et al, 1993;Crouzeilles et al, 2010).…”

Section: Metachirus Nudicaudatus (é Geoffroy 1803)unclassified

Diversidade, biogeografia, caracterização cariotípica e tricológica dos pequenos mamíferos não voadores do Parque Estadual Rio da Onça, Litoral Sul do Paraná

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Coupled population dynamics of two Neotropical marsupials driven by mesopredator's abundance

2019

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According to the mesopredator release theory, when top predators are eradicated from an area, mesopredators become overabundant. Didelphis aurita is the largest marsupial in the Atlantic Rainforest, and it occurs in higher abundances in the absence of top predators. This mesopredator has similar ecological requirements to the sympatric marsupial Metachirus nudicaudatus. Considering the similar requirements, and that D. aurita is about three times the size of M. nudicaudatus, our hypothesis is that the increase in D. aurita's abundance may negatively affect M. nudicaudatus' population. To test this hypothesis, we conducted a two-year capture-mark-recapture study in an area in the Southeast of Brazil where top predator community is depauperated. The relationship between the population dynamics of these two marsupials was analyzed by including abundance of D. aurita and environmental conditions as explanatory variables of the population parameters of M. nudicaudatus. We observed that all demographic parameters of M. nudicaudatus fluctuated over time and responded negatively to D. aurita abundance. Our conclusion is that, at least on a monthly timescale, the interspecific relationship with D. aurita seems to influence more M. nudicaudatus' population than any other environmental covariate. These findings suggest that mesopredator release can promote negative effects on population parameters of other species within the same trophic level. Considering that top predators are no longer present in most of the remaining Atlantic Rainforest fragments, the marsupial D. aurita has become a key species in this biome, with relevant consequences arising from its interspecific interactions. K E Y W O R D SAtlantic Rainforest, capture-mark-recapture, Didelphis aurita, mesopredator, Metachirus nudicaudatus, POPAN

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Diet of three didelphid marsupials (Mammalia, Didelphimorphia) in southern Brazil

Cited by 45 publications

References 10 publications

Comparative lengths of digestive tracts of seven didelphid marsupials (Mammalia) in relation to diet

Comparative lengths of digestive tracts of seven didelphid marsupials (Mammalia) in relation to diet

Diversidade, biogeografia, caracterização cariotípica e tricológica dos pequenos mamíferos não voadores do Parque Estadual Rio da Onça, Litoral Sul do Paraná

Coupled population dynamics of two Neotropical marsupials driven by mesopredator's abundance

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