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Search Results: 1 - 10 of 12811 matches for " Marcelo;Facure "
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Species richness, relative abundance, and habitat of reproduction of terrestrial frogs in the Triangulo Mineiro region, Cerrado biome, southeastern Brazil
Giaretta, Ariovaldo A.;Menin, Marcelo;Facure, Kátia G.;Kokubum, Marcelo N. de C.;Oliveira Filho, Júlio C. de;
Iheringia. Série Zoologia , 2008, DOI: 10.1590/S0073-47212008000200002
Abstract: based on field observations and pitfall sampling, we determined the species richness, relative abundance, and reproductive habitat of terrestrial frogs in three municipalities in the triangulo mineiro region, south cerrado biome, in southeastern brazil. we found thirty-two species of terrestrial frogs, belonging to the families brachycephalidae, bufonidae, cycloramphidae, dendrobatidae, leiuperidae, leptodactylidae and microhylidae. most of the species were found in open areas and reproduced in human-generated environments, such as artificial lakes (10 species) and ponds (14 species). dominance was high, with physalaemus cuvieri fitzinger, 1826 (leiuperidae) representing 48% of sampled frogs. a larger number of individuals was captured in the wet season, when most of the species were reproducing. compared to other areas of cerrado biome, the triangulo mineiro sites presented a larger number of species, which may be attributed to the larger sampled area and greater sampling effort, lower altitude and presence of human generated habitats. the richness of terrestrial frogs was also larger than that in some forested localities in southeastern brazil, indicating that the number of species cannot be explained only by precipitation and type of vegetation cover. the greater abundance of individuals during the wet season may be related to a greater movement of adults to breeding sites and to juvenile recruitment/dispersion. the heterogeneity of environments in the cerrado biome, including its several isolated highlands, contributes to its high (local and regional) diversity of frogs.
Barn owl (Tyto alba) predation on small mammals and its role in the control of hantavirus natural reservoirs in a periurban area in southeastern Brazil
Magrini, L.;Facure, KG.;
Brazilian Journal of Biology , 2008, DOI: 10.1590/S1519-69842008000400007
Abstract: the aim of this study was to inventory the species of small mammals in uberlandia, minas gerais, brazil, based on regurgitated pellets of the barn owl and to compare the frequency of rodent species in the diet and in the environment. since in the region there is a high incidence of hantavirus infection, we also evaluate the importance of the barn owl in the control of rodents that transmit the hantavirus. data on richness and relative abundance of rodents in the municipality were provided by the centro de controle de zoonoses, from three half-yearly samplings with live traps. in total, 736 food items were found from the analysis of 214 pellets and fragments. mammals corresponded to 86.0% of food items and were represented by one species of marsupial (gracilinanus agilis) and seven species of rodents, with calomys tener (70.9%) and necromys lasiurus (6.7%) being the most frequent. the proportion of rodent species in barn owl pellets differed from that observed in trap samplings, with calomys expulsus, c. tener and oligoryzomys nigripes being consumed more frequently than expected. although restricted to a single place and based on few individuals, the present study allowed the inventory of eight species of small mammals in uberlandia. the comparison of the relative frequencies of rodent species in the diet and in the environment indicated selectivity. the second most preyed upon species was n. lasiurus, the main hantavirus reservoir in the cerrado biome. in this way, the barn owl might play an important role in the control of this rodent in the region, contributing to the avoidance of a higher number of cases of hantavirus infection.
Seasonal variation in foraging group size of crab-eating foxes and hoary foxes in the Cerrado Biome, Central Brazil
Lemos,Frederico Gemesio; Facure,Kátia Gomes;
Mastozoolog?-a neotropical , 2011,
Abstract: in regions with a pronounced dry season, such as the cerrado biome (brazilian savannah), climate seasonality may affect food availability for canid species and, consequently, their foraging behavior. we investigated seasonal variation in foraging group size of crab-eating foxes (cerdocyon thous) and hoary foxes (lycalopex vetulus) in the cerrado region for three consecutive years. data were obtained by direct observations of foraging foxes during spotlight surveys. both species were sighted foraging individually or in pairs with or without their juvenile offspring. however, crab-eating foxes foraged in pairs more frequently in the wet season and individually more frequently in the dry season whereas hoary foxes foraged mostly individually throughout the year. the higher frequency of solitary foragers in the dry season is possibly a response to the seasonal shortages in the availability of clumped and locally abundant food resources such as fruit and insects, important items in the diet of the crab-eating fox during the wet season. the absence of seasonal variation in foraging group size of the hoary fox may be related to its specialized food habits, since termites predominate in the diet of this species in both seasons.
New record of Amphisbaena fuliginosa (Squamata, Amphisbaenidae) for the Cerrado Biome, in an area of extensive cattle ranching
Lemos, Frederico Gemesio;Facure, Kátia Gomes;
Biota Neotropica , 2007, DOI: 10.1590/S1676-06032007000100031
Abstract: samples of amphisbaena fuliginosa from the cerrado biome are scarce and additional data are needed to clarify the geographic distribution and patterns of differentiation of this species. during field works at a cattle farm in the south of the state of goiás, central brazil, we found an adult individual of a. fuliginosa. our specimen represents the southernmost record for the species, extending its distribution 150 km. the color is similar to that described for other specimens from goiás state, corroborating the uniform pattern observed for cerrado populations. we suggest that the fossorial habits of a. fuliginosa may allow its occurrence in anthropogenic habitats by offering protection against the changes in natural vegetation.
SEASONAL VARIATION IN FORAGING GROUP SIZE OF CRAB-EATING FOXES AND HOARY FOXES IN THE CERRADO BIOME, CENTRAL BRAZIL
Frederico Gemesio Lemos,Kátia Gomes Facure
Mastozoolog?-a neotropical , 2011,
Abstract: In regions with a pronounced dry season, such as the Cerrado Biome (Brazilian savannah), climate seasonality may affect food availability for canid species and, consequently, their foraging behavior. We investigated seasonal variation in foraging group size of crab-eating foxes (Cerdocyon thous) and hoary foxes (Lycalopex vetulus) in the Cerrado region for three consecutive years. Data were obtained by direct observations of foraging foxes during spotlight surveys. Both species were sighted foraging individually or in pairs with or without their juvenile offspring. However, crab-eating foxes foraged in pairs more frequently in the wet season and individually more frequently in the dry season whereas hoary foxes foraged mostly individually throughout the year. The higher frequency of solitary foragers in the dry season is possibly a response to the seasonal shortages in the availability of clumped and locally abundant food resources such as fruit and insects, important items in the diet of the crab-eating fox during the wet season. The absence of seasonal variation in foraging group size of the hoary fox may be related to its specialized food habits, since termites predominate in the diet of this species in both seasons.
Generation of Dose Volume Histograms Using Voxel Structure and the Monte Carlo Method in Low Dose Rate Brachytherapy  [PDF]
Artur F. Menezes, Hidmer Laulate, Juraci P. Reis Junior, Lucia H. Bardella, Alessandro Facure, Ademir X. Silva
International Journal of Medical Physics,Clinical Engineering and Radiation Oncology (IJMPCERO) , 2016, DOI: 10.4236/ijmpcero.2016.54024
Abstract: The Dose Volume Histograms are tools commonly used in medical physics, for the analysis of doses delivered to the tumors and organs at risk, during radiotherapy treatments. However, there are few studies in the literature showing in details the steps of its construction. This work presents the implementation and evaluation of a computational methodology, for the construction of Dose Volume histograms, generated from simulations using anthropomorphic and voxel phantoms, in conjunction with the Monte Carlo code MCNP. The methodology was evaluated considering brachytherapy planning of low dose rate, using 108 seeds of I-125 with individual activities of 0.33 mCi performed on the simulator in voxel recommended by ICRP 110. The dosimetric analysis after implantation showed that the prostate received doses ranging from 0 to 360 Gy. We found the values of 50, 145 and 160 Gy for the parameters D100, D90 and D80 and 28%, 90%, 92% and 95% for the parameters V200, V100, V90 and V80. The rectum and bladder received maximum doses equal to 41 and 60 Gy and found the values of 39 and 22 Gy and 58 and 42 Gy to the parameters D0.1cc and D2cc, respectively. The results after dosimetric implant proved satisfactory, which validate the methodology described above.
Hidrocefalia multiloculada: relato de dois casos
Guerreiro, Marilisa M.;Facure, Nubor O.;Silva, Ednéa A.;
Arquivos de Neuro-Psiquiatria , 1988, DOI: 10.1590/S0004-282X1988000300013
Abstract: multiloculated hydrocephalus is a clinicopathological entity consisting of enlarged, loculated ventricles and paraventricular poroencephalic cavities. we present two cases of multiloculated hydrocephalus: one due to infectious process of central nervous system and the other consequent to a congenital malformation. tomographic aspects of this condition that permit the diagnosis are stressed. the pathophysiology, the management and the prognosis are discussed according to the available literature.
Aspectos da tomografia computadorizada craniana na neurocisticercose na infancia
Guerreiro, Marilisa M.;Facure, Nubor O.;Guerreiro, Carlos A. M.;
Arquivos de Neuro-Psiquiatria , 1989, DOI: 10.1590/S0004-282X1989000200005
Abstract: the authors present the analysis of 27 computed tomography scans (ct) of 18 children which were divided in three groups according to clinical and tomographic criteria. group 1 was characterized mainly by epilepsy and calcifications. group 2 was characterized by intracranial hypertension and several tomographic aspects: edema, cysts and nodules were seen in three patients; hydrocephaly and calcifications were seen in two patients and ct was normal in one patient. group 3 had patients with epilepsy or headache and variable tomographic patterns. the results are discussed based on the available literature.
Courtship, vocalization, and tadpole description of Epipedobates flavopictus (Anura: Dendrobatidae) in southern Goiás, Brazil
Costa, Ronan Caldeira;Facure, Kátia Gomes;Giaretta, Ariovaldo Antonio;
Biota Neotropica , 2006, DOI: 10.1590/S1676-06032006000100006
Abstract: epipedobates flavopictus is a diurnal, aposematic dendrobatid with a wide distribution in seasonal wet tropical regions of brazil. we describe the daily period of vocalization, advertisement call, courtship behavior, and tadpole of e. flavopictus from a previously unknown population in southern goiás and compare theses features with that of other populations. studies were carried out in november (2004) and february (2005). we counted the number of calling males and duration of calling bouts in the morning and evening periods. the advertisement call was recorded with a digital recorder. tadpole description was based on specimens collected in pools. males called from well-illuminated sites such as rocky fields, rain channels, and borders of riverine forests. in november, males vocalized daily during two distinct periods, between 04:30 h and 10:00 h and between 16:30 h and 20:00 h. morning temperature varied between 20-23oc and humidity from 79-89%; during evening varied between 24-27oc and 54-82%. in the middle of the day, temperature reached 36oc and humidity 40%. during the morning, call activity was almost uninterrupted, in the evening calling bouts lasted around 9 min. in february, even with the occurrence of rainfall and temperatures similar to that of november no frog vocalized. the advertisement call is composed by a single note with 7-8 pulses with frequency ascending slightly from 3.20 to 4.05 khz. note duration was 144 ms, and between note intervals is 292 ms. notes are given at a rate of 139 per minute. upon observing the female, the male began to emit courtship call. the female approached the male and touched him laterally with her snout. the male moved forward and raised his hindquarters by stretching his hind legs. while leading the female, the male continued to give courtship and advertisement calls. the male clasped the female in axillary amplexus, and the pair entered a hole in a bank. the female deposited eggs on the surface of the soil, spreading th
Mammalia, Chiroptera, Phyllostomidae, Vampyrum spectrum (Linnaeus, 1758): First record for the state of Rond nia, Brazil, and new prey records
Discher, D. S.,Bernarde, P. S.,Facure, K. G.
Check List , 2009,
Abstract:
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