Daily Movement and Microhabitat Use by the Blacksmith TreefrogHypsiboas faber(Anura: Hylidae) during the Breeding Season in a Subtemperate Forest of Southern Brazil

2016 ◽  
Vol 11 (2) ◽  
pp. 89-97 ◽  
Author(s):  
Mateus de Oliveira ◽  
Gustavo Francisco Aver ◽  
Leonardo Felipe Bairos Moreira ◽  
Patrick Colombo ◽  
Alexandro Marques Tozetti
Keyword(s):  
Breeding Season ◽  
Microhabitat Use ◽  
Southern Brazil ◽  
Daily Movement

scholarly journals Microhabitat of small mammals at ground and understorey levels in a deciduous, southern Atlantic Forest

2013 ◽  
Vol 85 (2) ◽  
pp. 727-736 ◽  
Author(s):  
GERUZA L. MELO ◽  
BARBARA MIOTTO ◽  
BRISA PERES ◽  
NILTON C. CACERES
Keyword(s):  
Habitat Selection ◽  
Small Mammals ◽  
Strong Evidence ◽  
Animal Species ◽  
Deciduous Forest ◽  
Distribution Patterns ◽  
Microhabitat Use ◽  
Southern Brazil ◽  
Different Types ◽  
Didelphis Albiventris

Each animal species selects specific microhabitats for protection, foraging, or micro-climate. To understand the distribution patterns of small mammals on the ground and in the understorey, we investigated the use of microhabitats by small mammals in a deciduous forest of southern Brazil. Ten trap stations with seven capture points were used to sample the following microhabitats: liana, fallen log, ground litter, terrestrial ferns, simple-trunk tree, forked tree, and Piper sp. shrubs. Seven field phases were conducted, each for eight consecutive days, from September 2006 through January 2008. Four species of rodents (Akodon montensis, Sooretamys angouya, Oligoryzomys nigripes and Mus musculus) and two species of marsupials (Didelphis albiventris and Gracilinanus microtarsus) were captured. Captured species presented significant differences on their microhabitat use (ANOVA, p = 0.003), particularly between ground and understorey sites. Akodon montensis selected positively terrestrial ferns and trunks, S. angouya selected lianas, D. albiventris selected fallen trunks and Piper sp., and G. microtarsus choose tree trunks and lianas. We demonstrated that the local small-mammal assemblage does select microhabitats, with different types of associations between species and habitats. Besides, there is a strong evidence of habitat selection in order to diminish predation.

scholarly journals Microhabitat use by three species of egret (Pelecaniformes, Ardeidae) in southern Brazil

2013 ◽  
Vol 73 (4) ◽  
pp. 791-796 ◽  
Author(s):  
DP. Pinto ◽  
CC. Chivittz ◽  
FB. Bergmann ◽  
AM. Tozetti
Keyword(s):  
Air Temperature ◽  
Vegetation Cover ◽  
Microhabitat Use ◽  
Southern Brazil ◽  
Air Humidity ◽  
Great Egret ◽  
Bubulcus Ibis ◽  
Ardea Alba ◽  
Relative Air Humidity

In the present study, we examined the role of different habitat components and their relationship with microhabitat use by three species of egret: Cocoi heron (Ardea cocoi), Great egret (Ardea alba), and Cattle egret (Bubulcus ibis), in wetlands of southern Brazil. Ardea alba and A. cocoi were not habitat-specific (e.g. vegetation cover and flooding level). Conversely, B. ibis was associated with drier microhabitats. Relative air humidity and air temperature were the main variables which correlated with the occurrence of these species and supported the plasticity of B. ibis and its predominance in drier habitats.

Diet and habitat use of two sympatric species of Philodryas (Colubridae), in south Brazil

2005 ◽  
Vol 26 (1) ◽  
pp. 25-31 ◽  
Author(s):  
Otávio Marques ◽  
Paulo Hartmann
Keyword(s):  
Habitat Use ◽  
Feeding Habits ◽  
Strong Relationship ◽  
Sympatric Species ◽  
Food Type ◽  
Microhabitat Use ◽  
Southern Brazil ◽  
Food Items ◽  
Forested Areas ◽  
South Brazil

AbstractFeeding habits and habitat use of the colubrid snakes Philodryas olfersii and P. patagoniensis in southern Brazil are presented here. Philodryas olfersii and P. patagoniensis are sympatric in the study area and both dwell in open and forested areas. Specimens preserved in collections and observations of snakes in the field yielded the data. Both species are diet generalists, feeding on small vertebrates, mainly frogs. Philodryas patagoniensis has a broader diet, a less variable frequency of food items, and fed on heavier prey than P. olfersii. Seasonal variation in diet occurs in both species. The semiarboreal Philodryas olfersii is more slender and has a longer tail than the terrestrial P. patagoniensis, characters that may reflect differences in microhabitat use. There are a strong relationship between habitat use and frequency of a given food type. Differences in the use of food resources between P. olfersii and P. patagoniensis seem to reflect differences in foraging microhabitats used by each species.

scholarly journals The Azure Jay may reproduce in plantations of Araucaria angustifolia in southern Brazil

2012 ◽  
Vol 22 (2) ◽  
pp. 205-212
Author(s):  
ANDREA LARISSA BOESING ◽  
LUIZ DOS ANJOS
Keyword(s):  
Breeding Season ◽  
Cooperative Breeding ◽  
Secondary Forest ◽  
Field Observations ◽  
Araucaria Angustifolia ◽  
Southern Brazil ◽  
Natural Areas ◽  
Active Nest

SummaryWe undertook field observations of the Azure Jay Cyanocorax caeruleus in Araucaria plantations and a secondary forest in southern Brazil from 2007 to 2010. During the breeding season, the territory and the flock sizes in Araucaria plantations (31.6–42.2 ha; 2–3 individuals) seemed to be smaller than in the secondary forest (64.5–72.6 ha; 5–6 individuals). One active nest was monitored in October–November 2009 and indicated cooperative breeding by the Azure Jay, as for the majority of American jays. The fact that reproduction was documented in Araucaria plantations may be positive for the conservation of this species, since natural areas of mixed rainforest are becoming increasingly scarce.

scholarly journals Breeding biology of Long-tailed Cinclodes Cinclodes pabsti Sick, 1969 (Passeriformes: Furnariidae)

2021 ◽  
Vol 61 ◽  
pp. e20216184
Author(s):  
Jairo José Zocche ◽  
Fernando Carvalho ◽  
Ariovaldo Pereira Cruz-Neto
Keyword(s):  
Life History ◽  
Clutch Size ◽  
Breeding Season ◽  
Nearest Neighbor ◽  
Geographic Location ◽  
The Body ◽  
Breeding Biology ◽  
Southern Brazil ◽  
Substrate Type ◽  
Breeding Seasons

Cinclodes pabsti is an endemic passerine restricted to the highland areas in southern Brazil. The aim of this study was to provide information on its breeding biology. The nesting cavities along road cuts were monitored from May 2008 to March 2011. The survey was carried out monthly from May to July 2008, February to July 2009, 2010 (non-breeding season), weekly from August 2008 to January 2009, 2010 (breeding season), and on a 2 to 4-days basis from August 2010 to January 2011. The geographic location, physical characteristics, and soil/substrate type in which the nesting cavities were situated were recorded. The total number of cavities used in the three breeding seasons was 136, resulting in 295 nests. The distance of a nest to its nearest neighbor ranged from 24-2,368 m, with a higher number of nests (n = 34; 59.7%) in the distance interval of 24-500 m. There was a greater usage of cavities located in Inceptisols, and the distances of nesting cavity entrances to the ground and to the top of road cuts were 1.6 ± 0.9 m and 0.8 ± 0.62 m, respectively. The breeding season lasted 148 days from mid-August to early January. Clutch size (n = 256) varied from 2 to 3 eggs, and the eggs (n = 155) had a total length of 27.2 ± 1.3 mm, breadth of 20.9 ± 0.8 mm, and mass of 6.2 ± 0.7 g. The incubation phase lasted 17.3 ± 0.8 days and the nestling phase for 18.3 ± 1.5 days. The body mass of the chicks was 6.0 ± 1.0 g just after hatching and reached a maximum of 59.6 ± 2.4 g at 16 days of age. Our results can contribute to filling the gaps in knowledge of C. pabsti ecology, because its habitat is under high anthropic pressures and the information on its life history is yet limited.

Population dynamics of the black-cheeked gnateater (Conopophaga melanops, Conopophagidae) in southern Brazil

2009 ◽  
Vol 25 (6) ◽  
pp. 605-613 ◽  
Author(s):  
André Magnani Xavier de Lima ◽  
James Joseph Roper
Keyword(s):  
Population Dynamics ◽  
Population Growth ◽  
Breeding Season ◽  
Survival Rates ◽  
Territory Size ◽  
Adult Survival ◽  
Southern Brazil ◽  
Annual Survival ◽  
Socially Monogamous ◽  
Population Structure And Dynamics

Abstract:Population structure and dynamics of the black-cheeked gnateater (Conopophaga melanops) were studied at Salto Morato Nature Reserve, in Paraná, southern Brazil, from October 2006 to September 2007. Territory size and population density, breeding season (timing and length), reproductive success and annual survival rates were estimated from sightings of 18 marked adult birds and the success of 18 nesting attempts. The black-cheeked gnateater is socially monogamous and territorial, with a breeding-season length of approximately 3 mo beginning in early October. Predation caused most nest failures, nest survival was 0.96 d−1and apparent annual nesting success was 22%, resulting in annual productivity of 0.36 individuals per adult. Apparent adult annual survival was ~0.44 y−1. Seventy-five per cent of fledglings survived at least 2 mo after fledging. Two methods of estimating population growth rate suggest very different rates: r = −0.04 (~ stable), or λ varies between 0.475–0.616 (declining). Yet, low apparent adult survival suggests that territories are not permanent, perhaps abandoned after nest failure. We find that by estimating population growth, even in short-term studies, testable hypotheses can be generated that will allow better understanding of population dynamics.

scholarly journals Patterns of arboreal and terrestrial space use by non-volant small mammals in an Araucaria forest of southern Brazil

2014 ◽  
Vol 86 (2) ◽  
pp. 807-819 ◽  
Author(s):  
MAURY S.L. ABREU ◽  
LARISSA R. DE OLIVEIRA
Keyword(s):  
Habitat Use ◽  
Small Mammals ◽  
Space Use ◽  
Vertical Stratification ◽  
Microhabitat Use ◽  
Southern Brazil ◽  
Ecological Data ◽  
Araucaria Forest ◽  
Use Patterns ◽  
Dense Vegetation

Despite the advances in the techniques for researching arboreal small mammals, detailed ecological data, such as habitat use patterns, are practically nonexistent for many species. Using 150 live-traps installed on the ground, understory (1.0-5.0m) and canopy (>5.0m) we investigated patterns of arboreal and terrestrial space use by small mammals in an Araucaria Forest in southern Brazil (29°29′08″S; 50°12′26″W). We also measured 19 microhabitat variables that could potentially influence the abundance of such mammals on each trap station. The results indicated that Akodon montensis and A. serrensis were mainly terrestrial. Delomys dorsalis was also terrestrial, but it also used understory (17.24% of captures). Juliomys sp. and Gracilinanus microtarsus were the most arboreal small mammals recorded. A. montensis was associated with dense vegetation, while A. serrensis selected positively opened areas. Juliomys sp. and G. microtarsus were associated to microhabitat variables related to the access and movement within the canopy. Moreover, bromeliads on arboreal layer were an important factor for these two arboreal species. This is the first study to report microhabitat associations by Juliomys sp. and A. serrensis, and we demonstrated that vertical stratification and microhabitat use were both synergic mechanisms to determine habitat use by small mammals on the Araucaria Forest of southern Brazil.

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