Navegando por Orientadores "OLIVEIRA, Ana Cristina Mendes de"

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Acesso aberto (Open Access)
Caracterização do uso da fauna cinegética em aldeias das etnias Wayana e Aparai na terra indígena parque do Tumucumaque, Pará
(Universidade Federal do Pará, 2009) VELTHEM LINKE, Iori Leonel Arnoldo Hussak Van; OLIVEIRA, Ana Cristina Mendes de; http://lattes.cnpq.br/1199691414821581
The game is very important for the maintenance of traditional ways of life of indigenous peoples in the Amazon. However, when the game is not made in a sustainable way the pressure can lead to local extinctions and imbalances in the ecosystem. This study aims to characterize the use of wildlife hunting in two villages of ethnic Wayana and Aparai who lives in Parque Indígena do Tumucumaque, northern of Pará State. Were tracked and interviewed 29 hunters in 60 days of data collection. The interviews have raised 45 species of mammals occurring in the area and also the main game species with their respective seasons of hunting. Altogether 219 animals were hunted from 35 different species, totaling 2,558 kg of biomass. The species was hunted more Tayassu peccary (n = 50; 1,350 kg), second was Ateles paniscus (n = 30, 261 kg). The most hunted bird was Crax Alector (n = 18, 58.5 kg), and the green lizard Iguana iguana was the most hunted reptile (n = 18, 37 kg). Of these, all were within the expected average weights. Only for I. iguana statistical difference was observed in sex ratio, and all the A. paniscus killed were females. The curves of survivalship of the most hunted mammals, T. peccary, A. paniscus, Cebus apella (n = 16) and Cuniculus paca (n = 12) points to a sharp withdrawal of adult and senile animals. The favorite game species were, in descending order, A. paniscus, C. apella, C. paca, T. peccary, Pecari tajacu, Tapirus terrestris, Alouatta macconnelli, Mazama americana, C. Alector and Psophia crepitans. By the hunting methods of active-selective and non-selective-opportunistic were recorded the same number of animals hunted. Due to the hunting of large mammals, the largest amount recorded opportunistic forms of biomass harvested (1590 kg), while selective methods focused primates and birds, totaling 968 kg. Due cultural issues, the Wayana and Aparai hunters seek animals when they are fat. They rarely hunt animals outside the species hunting seasons. The activity of fishing yielded 1211.7 kg of 44 morphospecies. The game was about 2/3 of all biomass consumed. Meals based on game meat were more extensive and yielded more protein than meals with fish. The per capita daily consumption of game was 104.37 g and 22.44 g of fish. The area used to hunt of the two villages was estimated at 518.73 km ². The analysis of sustainability of hunting suggests that only C. apella and A. paniscus are being over-exploited.
Acesso aberto (Open Access)
A diversidade de mamíferos de médio e grande porte e o potencial desta fauna na regeneração de clareiras artificiais na região do Rio Urucu, Coari, Amazonas
(Universidade Federal do Pará, 2009) SANTOS, Fernanda da Silva; OLIVEIRA, Ana Cristina Mendes de; http://lattes.cnpq.br/1199691414821581
The region of Urucu River, in western Brazilian Amazon, is a priority area for conservation due to its species richness and biogeographical importance. In this region activities of oil and natural gas extraction are developed, which results gaps opening in the continuous forest. The objective of this study was to 1) estimate the species richness, composition and abundance of the medium and large-sized mammals community by linear transect, indirect evidences and camera traps; and to 2) record the presence of the mammals species on the gap through camera traps and direct observations, verifying its participation on the gap regeneration process. Additionally, camera traps were also installed in forest to work as control-areas. A total of 40 mammal species were recorded, 25 by linear transect, 16 by indirect evidences, and 15 by camera traps. The species Lagothrix cana was the most abundant by using linear transect, while T. terrestris was the most abundant by using camera traps and indirect evidences. Camera traps sampled seven species in gaps and 14 in forest. The most frequent species sampled in gaps are herbivore-frugivorous. The direct observation in gaps totalized 144 hours, where three species were registered. In gaps, the specie Dasyprocta fuliginosa frequently exhibited behavioral categories “walking” and “stopped”, while the species Tapirus. terrestris and Saguinus pileatus spent more time feeding. Data obtained by monitoring gaps let us to suggest that mammals can play an important role on the regeneration of these areas through the processes of herbivory and dispersal of fruits and seeds.
Acesso aberto (Open Access)
Efeito da conversão de floresta amazônica de terra firme em plantação de palma de dendê (Elaeis guineensis jacq.) sobre a fauna de mamíferos de médio e grande porte
(Universidade Federal do Pará, 2013) MARIA, Susanne Lúcia Silva de; OLIVEIRA, Ana Cristina Mendes de; http://lattes.cnpq.br/1199691414821581
Acesso aberto (Open Access)
Efeito da monocultura da palmeira de dendê (Elaeis guineensis Jacq.) sobre a fauna de primatas na Amazônia Oriental
(Universidade Federal do Pará, 2016-04-25) MINEIRO, Ivo Gabriel Barros; OLIVEIRA, Ana Cristina Mendes de; http://lattes.cnpq.br/1199691414821581
Acesso aberto (Open Access)
Efeito da monocultura de palma de dendê (Elaeis guineensis Jacq.) sobre a fauna de pequenos mamíferos não-voadores na Amazônia
(Universidade Federal do Pará, 2013) LIMA, Renata Cecília Soares de; OLIVEIRA, Ana Cristina Mendes de; http://lattes.cnpq.br/1199691414821581
Acesso aberto (Open Access)
Efeito da plantação de palmeira de dendê (Elaeis guineensis Jacq.) sobre a fauna de carnívoros na Floresta Amazônica
(Universidade Federal do Pará, 2016-07-28) OLIVEIRA, Geovana Linhares de; OLIVEIRA, Ana Cristina Mendes de; http://lattes.cnpq.br/1199691414821581
The oil palm plantation has been considered a promising activity in tropical regions. Its expansion has caused great loss of tropical forest habitats and is considered a threat to biodiversity. Although most cultivated areas use previously deforested areas, the effects of this monoculture on the biodiversity of the Amazon region are still poorly understood. In this study we investigated the effect of oil palm plantation on the carnivorous fauna of the Amazon region. We performed the survey and monitoring of this group of mammals and related to some environmental metrics that would be related to the effects of monoculture on the recorded species. The metrics evaluated in this study were basal area of DAP categories 5-10cm and DAP> 10cm, perpendicular distance of the palm or forest matrix, distance of water bodies. There was an effect on the composition and abundance of carnivores, where the habitats differed on the basal area of DAP categories 5-10cm, and in the plantation areas this metric has no evidence. Although the plantation is not considered an impermeable matrix, the fauna of carnivores is not distributed in a homogenous way in the landscape. The most affected species were large carnivores and the generalist and opportunistic species, such as the middle predators, were benefited by the plantation. Our results show that the monitoring and strategies aimed at understanding how planting attributes influence the occurrence of these animals is of.
Acesso aberto (Open Access)
Efeito do plantio de dendê (Elaeis guineensis Jacquin 1763) sobre a diversidade funcional de mamíferos terrestres
(Universidade Federal do Pará, 2014-03-12) MAUÉS, Paula Cristina Rodrigues de Almeida; OLIVEIRA, Ana Cristina Mendes de; http://lattes.cnpq.br/1199691414821581
We studied the effect of palm tree planting on the functional diversity of terrestrial mammals in a region of the Amazon Forest in the northeast of the State of Pará, Brazil. We evaluated through measures of Functional Diversity (FD) the impacts that this planting can have on the functional groups of medium and large terrestrial mammals. In addition to the species richness we consider the abundance of species in the analyzes involving the functionality, through the Biological Trait Analysis (BTA) and the Functional Diversity Analysis based on the Rao quadratic entropy index (FDq). No effect of palm oil planting on the FD of the mammals was observed, considering only the species richness. However, in the analyzes in which the abundance of the species was considered (FDq and BTA), it was possible to observe the effects on the functional groups. The functional traits most affected by the effect were: general food habits, bunodon dentition, diurnal activity period, diet based on fruits, seeds, invertebrates and exudates, social behavior in small groups, arboreal locomotion, sub-forest forest strata and sub-canopy and the functional groups most affected by palm planting were primates and other arboreal species, compromising the functions of seed predation and dispersion, decreased nutrient cycling, reduced invertebrate control, decreased herbivory, and altered species life history vegetables.
Acesso aberto (Open Access)
Estudo da comunidade de pequenos mamíferos não-voadores, sob efeito do fogo e da borda, em área de floresta de transição Amazônia-Cerrado, Querência, MT
(Universidade Federal do Pará, 2008-10-10) SANTOS, Paulo Guilherme Pinheiro dos; OLIVEIRA, Ana Cristina Mendes de; http://lattes.cnpq.br/1199691414821581
The deforestation of the Amazon, caused by farming and agribusiness activities in the northern state of Mato Grosso, has committed Transition Forests Amazon-Savanna, before the biodiversity of these areas is known by researchers. The fauna of small non-flying mammals is part of the little-known groups in the region, and may be suffering impacts of human activities, primarily effect of fire, used for cleaning of pastures and deforestation for the soybean plantations. This study characterized the diversity of small mammals not flying in an area of Amazon forest-savannah transition in the northern state of Mato Grosso and investigated the effect of fire and the effect of edge on this group of fauna. Two areas of 150 hectares were sampled, a preserved and another under impact of fire, with 183 traps of the type live-trap for three years in two season (dry and rainy seasons). The method used was the capture-mark-recapture. The sampling effort was 23,424-traps night. 390 individuals were captured with a successfully capture of 1.66%. A total of 11 species were caught, 6 rodents and 5 marsupials. Hylaeamys megacephalus was the most abundant species. The diversity of small mammals in the study area was more related to the Savanna than Amazon. In relation to fire, the species richness was not statistically different, but the abundance was significantly higher in transects located in an area without fire. Two distinct groups of transects were characteristic depending on the presence or absence of fire based on the composition of small mammals. The abundance of Hylaeamys megacephalus was significantly higher in transects that suffered no impact from fire. Regarding the effect of edge in Area 2, despite the richness of species was not significantly different, the abundance was significantly higher regarding distance from the border. Already in Area 1, nor richness nor abundance was statistically different regarding distance from the edge. This fact could be masked by both the direct and indirect effect of experimental fire on small mammals. When considered together fire and distance from the border, the relationship between them became clearer, since all transects sampled under effect of the fire had minor abundances. The population size of Hylaemys megacephalus was calculated over five seasons (dry and wet) in the area without influence of fire, and the rainy season of 2006 was statistically different peak and the other that growth can be explained by the “Alle effect”. There was no statistically significant differences in the structure of the community of small non-flying mammals between the dry and rainy seasons. This work contributed to the search of mammal knowledge at this region threatened by human pressures.
Acesso aberto (Open Access)
Fatores determinantes do uso de habitats por mamíferos ungulados (Artiodactyla e Perissodactyla) na Amazônia Oriental
(Universidade Federal do Pará, 2022-04) ALVES, Michel Jacoby Pereira; OLIVEIRA, Ana Cristina Mendes de; http://lattes.cnpq.br/1199691414821581; https://orcid.org/0000-0002-7863-9678
Land use by human activities in landscapes of the eastern Amazon has been modifying and suppressing the native habitats of this region, altering the dynamics of ecosystems and negatively affecting biodiversity. Herbivorous-frugivorous ungulate mammals are among the groups of mammals most affected by these changes in ecosystems. Through the use of camera traps, we recorded ungulates and measured hunting pressure. Using satellite images, we evaluated the environmental characteristics and human pressures that may be influencing the abundance of tapirs (Tapirus terrestris), deer (Mazama americana and Mazama nemorivaga) and wild pigs (Pecari tajacu and Tayassu pecari) in habitats with different levels of disturbance. The species showed different responses to landscape and land use variables. Our result demonstrates that all species studied showed some degree of tolerance to disturbed habitats, except for abandoned pasture and oil palm plantation habitats. We also demonstrate that although the species use degraded habitats, they have a high dependence on forested habitats.
Acesso aberto (Open Access)
Fatores determinantes na ocorrência de espécies de carnívoros (Mammalia: Carnivora) em áreas degradadas na amazônia oriental
(Universidade Federal do Pará, 2018-05) RIBEIRO, Ana Carolina da Cunha; OLIVEIRA, Ana Cristina Mendes de; http://lattes.cnpq.br/1199691414821581; https://orcid.org/0000-0002-7863-9678; WIIG, Oystein; http://lattes.cnpq.br/6664624762387564
Deforestation, habitat fragmentation, and forest impoverishment have led to a reduction in biodiversity and loss of ecosystem functions in the Amazon Rainforest. Due to the context of high anthropogenic pressure, the importance of degraded primary forests and secondary forests for the conservation of tropical species has been discussed in the literature. In this work, we investigate the characteristics of a degraded landscape have been determinant for the occurrence of species of the order Carnivora, in a context of high anthropic pressure in the eastern Amazon. As the use of photographic traps, we related environmental and landscape variables with the abundance of the species using Generalized Global Models analyzes. The responses of the carnivorous species were differentiated about some variables. However, we concluded that even in a context of high degradation, the factor that still modulates the occurrence of most carnivores is the forest, even if degraded.
Acesso aberto (Open Access)
Fatores determinantes para a abundância de espécies de mamíferos ameaçados em área de alta pressão antrópica na Amazônia Oriental
(Universidade Federal do Pará, 2019-04-17) SANTOS, Juliana Januária Teixeira; WIIG, Oystein; http://lattes.cnpq.br/6664624762387564; OLIVEIRA, Ana Cristina Mendes de; http://lattes.cnpq.br/1199691414821581
On the latest 60 years the degradation and fragmentation of native habitats have been modifying the landscape in the eastern Brazilian Amazon. The adaptive plasticity of an organism has been crucial for its long-term survival and success in these novel ecosystems. In this study, we investigated the response of four endangered species of large terrestrial mammals to the variations in the quality of their original habitats, in a context of high anthropogenic pressure. The distribution of the Myrmecophaga tridactyla (Giant anteater), Priodontes maximus (Giant armadillo), Tapirus terrestris (Lowland tapir) and Tayassu pecari (White-lipped peccary) in all sampled habitats suggests their tolerance to degradation. However, the survival ability of each species in the different habitats was not the same. Among the four species, T. pecari seems to be the one with the least ability to survive in more altered environments. The positive influence of the anthropogenically altered habitats on abundances of three of the four species studied, as observed at the regeneration areas, can be considered as a potential indication of the ecological trap phenomenon. This study reinforces the importance of the forest remnants for the survival of endangered mammal species, in regions of high anthropogenic pressure, as in the eastern Brazilian Amazon.
Acesso aberto (Open Access)
Impactos de mudanças climáticas e desmatamento na distribuição geográfica de Cebus kaapori (Primates: Cebidae) na Amazônia
(Universidade Federal do Pará, 2018-04-02) GOMES, Letícia Braga; FREDERICO, Renata Guimarães; http://lattes.cnpq.br/3156181119549976; OLIVEIRA, Ana Cristina Mendes de; http://lattes.cnpq.br/1199691414821581
Climate change and deforestation are among the greatest threats to biodiversity. In the Amazon, the establishment of Protected Areas is an important tool to reduce the negative impacts of these threats, favoring the protection of biodiversity. Amazonia holds the largest number of primates in the world. Primates are highly sensitive to forest loss and habitat modification, which directly threatens the survival of their populations. The Ka’apor Capuchin Cebus kaapori is considered the rarest and most threatened primate species in the Amazon, and is classified as Critically Endangered by the International Union for the Conservation of Nature. Here, we evaluated the impacts of climate change and deforestation on Cebus kaapori distribution area. We modeled the distribution of the species under current and future (2050) climates and overlapped these models with established protect areas as well as current forest cover and that expected for 2050 in two different economic scenarios acoording to a land-use model. We found that climate change might lead to up to 97% of loss of climatic suitable area for Cebus kaapori within the next 30 years. The situation worsens when considering current forest loss and future deforestation projections, both under a governance scenario and in under the business-as-usual scenario. We show that the restricted distribution of Cebus kaapori, coupled with likely high reduction in suitable areas for species occurrence, low coverage in protected areas and fragmentation of potential adaptive areas for occurrence in the future, might reduce species’ populations to an unviable level of survival in nature.
Acesso aberto (Open Access)
Influência da perturbação ambiental na assembleia de pequenos mamíferos nãovoadores na Amazônia Oriental
(Universidade Federal do Pará, 2019-06) SOTOMAYOR, Omar Santiago Erazo; OLIVEIRA, Ana Cristina Mendes de; http://lattes.cnpq.br/1199691414821581; https://orcid.org/0000-0002-7863-9678
Anthropogenic environmental disturbance results in different structural modifications of the forest, which can lead to changes in species composition patterns, taxonomic and functional diversity. We evaluated the influence of environmental disturbance on the structure and diversity of assemblies of non-flying small mammals in the eastern Amazon. We analyzed species composition, richness and abundance and their functional characters as assemblage descriptors, considering their environmental variations, in three levels of environmental disturbance: (i) forest interior; (ii) edge of the forest; and (iii) rural space. The diversity α (taxonomic and functional) remained relatively constant through the levels of anthropogenic environmental disturbance. However, in the taxonomic diversity β, the assemblage of the forest-edge community presents abundance gradients, where they share most of their species, but some individuals of the edge are lost in the forest. On the other hand, the rural forest and rural edge assemblages present a balanced variation of abundance, in which individuals of some species of forest and border areas are replaced by individuals of different species in rural space. Among the morphological attributes we observed subtler responses of the community, small mammals characterized by a larger tail predominate in forest areas and those characterized by a larger foot predominate in rural areas. We conclude that the morphological attributes (tail and foot length) are determining factors in the assemblage composition patterns of the small non-flying mammals and their habitat selection in environments facing anthropic impacts. The changes and patterns identified in our study are of crucial importance for biodiversity management and conservation plans.
Acesso aberto (Open Access)
Potencial de contribuição de Tapirus terrestris (Tapiridae, Perissodactyla) na restauração florestal pós mineração de bauxita na Amazônia Oriental
(Universidade Federal do Pará, 2024-03) AMARAL, Lia Torres; CERQUEIRA, Roberta Macedo; http://lattes.cnpq.br/2863595777814509; OLIVEIRA, Ana Cristina Mendes de; http://lattes.cnpq.br/1199691414821581; https://orcid.org/0000-0002-7863-9678
Seed dispersal is one of the ecosystem services with high potential to accelerate the forest restoration process in degraded areas. Considered the largest terrestrial herbivores in South America, tapirs (Tapirus terrestris) L.1758 play an essential role in dispersal, herbivory and nutrient cycling in neotropical forests. In this study, we investigated the potential of the Tapirus terrestris species to contribute to the forest restoration process through seed dispersal in areas recovering after bauxite extraction. To do this, we collected 30 faecal samples and screened and identified the seeds found. We recorded 51,961 seeds from 33 plant species distributed across 11 families. Of the total seeds recorded, 78% remained physically intact after passing through the tapirs' digestive tract. The high concentration of faeces in forest restoration areas shows that these areas are attractive to tapirs. The most abundant taxa were from Cecropia, Byrsonima, Mimosa and Solanum. Our results reinforce the seed-dispersing role attributed to the species Tapirus terrestris, in addition to adding at least seven new potentially dispersed species to the general list existing for the Neotropics in the literature.
Acesso aberto (Open Access)
O uso da fauna cinegética e o consumo de proteína animal em comunidades rurais na Amazônia oriental: Reserva Extrativista Tapajós/Arapiuns Pará - Brasil
(Universidade Federal do Pará, 2008-05-19) SILVA, Alexandre Fernandes de Souza e; OLIVEIRA, Ana Cristina Mendes de; http://lattes.cnpq.br/1199691414821581
Since the pre-history hunting and fishing have been the classic examples of men´s exploration of natural resources and, for some communities these are still the main source of food. However, the fishing and some products originating from the vegetable extractives have been the mainly goal of researches of the industrial market instead of studies of etnoconservation. In consequence of this institutional indifference and another intrinsic political factors just a little bit is known about the biology, the ecology, the etology and mainly about the intensity of exploration of the cynegetic fauna in tropics. There are not many studies about the food of traditional populations in Amazon mainly when is referring to the economic and nourishment importance of hunting and its relationship to the wildlife conservation. This 'Study of Case' was guided to accomplish the characterization of the cynegetic fauna explored by extractivist families of Aminã and Solimões communities (Tapajós/Arapiuns Extractivist Reserve) during the two season of the year (raining and drying season), and also showed the nourishment parameters of the protein indicatives of hunting activities for those families. The datas of relative abundance (biomass) of the species registered in both studied communities show that Dasyprocta leporine (cutia) was the more pressed specie. When examine the Indicative of Biomass (IB) between the sources of animal proteins and among the studied communities the conclusion is when the meal is made with hunting flesh although not often is more plenty than fishing. Referring to Indicative of Protein (IP), when observed among the several sources was verified when the meal is done with hunting flesh overwhelming all the other sources in terms of protein concentration then making the hunting flesh the most nutritious meal. The present study has the potential of contributing with important scientific information for the administration of the cynegetic resources and, consequently, to contribute with the definition of criterion and parameters for the launching of integrated handle projects of human occupations.
Acesso aberto (Open Access)
Variabilidade individual na dieta de Hylaeamys megacephalus (Rodentia, Cricetidae) em habitats florestais e de monocultura de palmeira de dendê na Amazônia Oriental
(Universidade Federal do Pará, 2016-02-29) PENA, Simone Almeida; OLIVEIRA, Ana Cristina Mendes de; http://lattes.cnpq.br/1199691414821581
In most studies on niche, occupation in individual variability to communities or populations is not taken into consideration. However, habitat differences and resource availability would also have influence on individual variations in medium and long term, causing significant effects on the diversification and speciation of animal species, since they affect the stability of the population. Individual specialization would then be a way to reduce the intraspecific competition in response to several factors, such as environmental variations, ecological pressures and resource polymorphisms. Individuals become more opportunistic when the intraspecific competition is high and preferred resources are scarce. This change should result in increased amplitude diet for individuals, since they add companies not previously used to his repertoire. As a result, the niche breadth of the population as a whole must increase are structurally less complex than natural forests, but their effects vary according to each ecological group, functional role and ecophysiological requirements. There are few studies on these environmental changes resulting from this monoculture on the tropical forest fauna. In the present study, we characterized the diet of rodent Hylaeamys megacephalus and evaluate the degree of individual variation in the function of the two diet inserted habitats in the Amazon biome. The diet of H. megacephalus specimens consists of 18 food items, 12 of which are animal-eight of plant origin, and only one unique item Forest. The items "palm fiber" (FOi% = 44%) and "whole seeds" (FOi% = 40%) have higher frequency of occurrence among individuals collected in palm plantation habitats, but "fruit squash palm "(IAi% = 85.4%) was the most important item in the diet. The observed data show that the environments, both plantation as forest affect the individual expertise of the population of Hylaeamys megacephalus.