Novos métodos no estudo da estratificação vertical de marsupiais neotropicais

Delciellos, Ana Cláudia; Loretto, Diogo; Vieira, Marcus Vinícius

doi:10.4257/oeco.2006.1002.02

Cited by 20 publications

(15 citation statements)

References 61 publications

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“…Each device weighed 4.8 g and had 480 m of thread and was attached to the fur between the shoulders of each individual by using an ester‐cyanoacrylate‐based glue (Henkel Loctite Adesivos Ltda., Manaus, Brazil; Delciellos et al . , ). The thread released by the device allowed mapping the animals` path, obtaining movement data on a fine scale (e.g.…”

Section: Methodsmentioning

confidence: 99%

Negative or positive density‐dependence in movements depends on climatic seasons: The case of a Neotropical marsupial

et al. 2018

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One of the major challenges in animal ecology is to understand the factors and processes driving movement behaviour. Although density may influence movement patterns, the occurrence and nature of density-dependence in animal movements are still unclear, particularly whether it may vary among populations of a species, or across time within a population. Here, we evaluate the occurrence and nature of densitydependence in the movements of a Neotropical marsupial, the Grey four-eyed opossum Philander frenatus (Didelphidae, Didelphimorphia). We quantified fine-scale path tortuosity of individuals inhabiting continuous forest areas and forest fragments, in different climatic seasons (humid vs. super-humid). We also determined the relative importance of population size compared to sex and body mass on movements, using a modelselection approach. In forest fragments, path tortuosity increased with population size in the super-humid season, but decreased in the humid season. In the continuous forest, path tortuosity was affected only by sex and body mass, being slightly higher in males and negatively related to body mass. The occurrence of density-dependence on movements only in forest fragments is likely to reflect the higher overall density of P. frenatus in small forest fragments. The variation in the nature of density-dependence between climatic seasons is likely to reflect a trade off between foraging over large areas (humid season, low resource availability) versus avoiding agonistic encounters (super-humid season, high resource availability). Our results show that (i) density-dependence in movements may be context-dependent occurring only in areas of relatively high overall population density; and (ii) density may affect movements in different ways at different climatic seasons.

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Section: Methodsmentioning

confidence: 99%

Negative or positive density‐dependence in movements depends on climatic seasons: The case of a Neotropical marsupial

et al. 2018

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“…Artificial nest grids had 21 nest stations, 30-40 m apart (details in LORETTO 2005 andDELCIELLOS et al 2006). Artificial nests were made of painted bamboo culms (Bambusa vulgaris var.…”

Section: Methodsmentioning

confidence: 99%

“…These endemic species are restricted to 11-16% of the biome's original coverage (RIBEIRO et al 2009). Habitat loss and the cryptic habits of most medium to large or small mammal species make them difficult to study (BEKER & DALPONTE 1991, DELCIELLOS et al 2006, PREVEDELLO et al 2008. About 10% of the Atlantic forest mammal species are small marsupials, opossums and mouse opossums (REIS et al 2006, Didelphimorphia: Didelphidae).…”

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Artificial nests as an alternative to studies of arboreal small mammal populations: a five-year study in the Atlantic Forest, Brazil

Loretto¹,

Vieira²

2011

Zoologia (Curitiba, Impr.)

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ABSTRACT. Despite the great diversity of Brazilian Atlantic forest small mammals, natural history of most species is unknown due to their cryptic and nocturnal habits, but also due to the inadequacy of methods to capture some species, especially those of arboreal habits. A new technique, based on the use of artificial nests (AN) to record arboreal marsupials, is presented. Artificial nests were combined with traditional live traps to study the population ecology of four didelphid marsupial species. After 62 months of monitoring, 119 individuals were recorded 243 times (total success = 5.2%). Only 26 individuals (22%) were recorded by both AN and live trap methods, and two of the four species were never captured by live traps, only by AN. Live traps alone would have provided biased data of the structure of small mammal assemblages, creating artificial tendencies in population dynamics of many species. Detectability estimates based on mark-recapture data could correct bias resulting from the use only live traps, but these estimates require that at least some individuals of each age class or stage are captured. Only the combination of AN and live traps can produce more accurate data on population dynamics and assemblage structure. This study demonstrates that artificial nests represent a new method that should be combined with live traps in studies of small mammal assemblages and populations.

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“…There have been a number of studies on the use of space by several species using the spool-and-line tracking technique (PREVEDELLO et al 2008, CERBONCINI et al 2011. This technique allows the calculation of total home range of individuals in the traditional sense (CERBONCINI et al 2011) as well the calculation of the "daily home range" (DHR), resulting from the movement of animals during their normal activities in one night (CUNHA & VIEIRA 2002, MENDEL & VIEIRA 2003, LORETTO & VIEIRA 2005, DELCIELLOS et al 2006, ALMEIDA et al 2008, PREVEDELLO et al 2010). This technique is also useful for investigating other characteristics of habitat use by individuals since it allows the mapping of the places where the individuals move.…”

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Use of space by the Neotropical caviomorph rodent Thrichomys apereoides (Rodentia: Echimyidae)

Almeida

Freitas

Talamoni

2013

Zoologia (Curitiba)

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Novos métodos no estudo da estratificação vertical de marsupiais neotropicais

Cited by 20 publications

References 61 publications

Negative or positive density‐dependence in movements depends on climatic seasons: The case of a Neotropical marsupial

Negative or positive density‐dependence in movements depends on climatic seasons: The case of a Neotropical marsupial

Artificial nests as an alternative to studies of arboreal small mammal populations: a five-year study in the Atlantic Forest, Brazil

Use of space by the Neotropical caviomorph rodent Thrichomys apereoides (Rodentia: Echimyidae)

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