Estrutura de áreas protegidas dos assentamentos de reforma agrária no município de Uberlândia-MG, Brasil: um estudo de ecologia de paisagem

Maywald, Paula Guardenho; Júnior, Oswaldo Marçal

doi:10.1590/s1982-45132013000100007

Cited by 7 publications

(5 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The territory of Uberlândia (18º55'23" S, 48º17'19" W) is approximately 4,115 km² (IBGE 2020), consisting of typical Cerrado biome vegetation and areas with agricultural (mainly livestock farming and monocultures) and urban activities. Local remnants of riparian vegetation consist of riparian forests, palm swamps and humid fields are located in areas with some type of protection (Cardoso & Schiavini 2002, Maywald & Marçal-Júnior 2013). The hydrography is represented by sub-basins and microbasins of the Paranaíba River, such as the Araguari and Uberabinha basins (Rosa et al 2019).…”

Section: Study Areamentioning

confidence: 99%

Dragonflies and Damselflies in a region of the Triângulo Mineiro, Minas Gerais: checklist and taxonomic additions

et al. 2021

View full text Add to dashboard Cite

Remaining freshwater systems are historically under threat mainly due to human activities such as agriculture and urbanization. The consequences of such activities are innumerous, and among them there is a decrease of suitable habitats for threatened fauna. In the Brazilian Cerrado, the odonatofauna of palm swamps and riparian forests are still poorly explored, a fact that difficult conservation efforts of the group. Thus, we performed an inventory in several urban and rural sites containing these phytophysiognomies in Uberlândia, Triângulo Mineiro region, western Minas Gerais state. In total, we found 101 Odonata species, seven families and 46 genera in the municipality, with 76 and 66 species, respectively, belonging to palm swamp and forest sites. From this diversity, eight species were first records in the state of Minas Gerais: Neuraeschna claviforcipata Martin, 1909, Phyllocycla cf. medusaBelle, 1988, Diastatops intensa Montgomery, 1940, Oligoclada pachystigma Karsch, 1890, O. xanthopleura Borror, 1931, Angelagrion nathaliaeLencioni, 2008, Telebasis sanguinalis Calvert, 1909 and Telebasis simulacrum (Calvert, 1909). We also sampled Erythrodiplax anaGuillermo-Ferreira & Vilela 2016, a species listed as endangered (EN) by the IUCN red list. Additionally, we include some taxonomic notes of Forcepsioneura machadorum females, a newly discovered species in the region. Our results contribute to the Odonata database in Brazil and highlights the importance inventories in poorly explored aquatic ecosystems.

show abstract

Section: Study Areamentioning

confidence: 99%

Dragonflies and Damselflies in a region of the Triângulo Mineiro, Minas Gerais: checklist and taxonomic additions

et al. 2021

View full text Add to dashboard Cite

show abstract

“…O experimento foi conduzido na Fazenda Experimental do campus Glória, da Universidade Federal de Uberlândia, no município de Uberlândia, MG, (18º56'56" de latitude Sul e 48º12'47" de longitude Oeste [18], a uma altitude de 925 metros). A temperatura média anual varia de 19°C a 27°C e seu clima é do tipo Aw, conforme classificação de Köppen, com inverno seco, frio e com baixa intensidade pluviométrica, enquanto que o verão é quente e chuvoso [25].…”

Section: Localunclassified

Effect of Season and Age on Thermophysiological and Hematological Variables of Crossbred Dairy Calves in Tropical Environment

Nascimento

Bizare

Guimarães

et al. 2019

Acta Scientiae. Vet.

View full text Add to dashboard Cite

Background: The wellbeing and performance of calves may be impaired if raised in high temperature environments. Physiological and hematological variables serve as a tool to assess the welfare of cattle; therefore, the influence of seasons and age on physiological and hematological variables was evaluated of crossbred dairy calves in a tropical environment.Materials, Methods & Results: Forty-two male and female calves were evaluated from July 2016 to July 2017, when the calves were of 2, 15, 30, and 60 days of age. Respiratory (RR) and heart rates (HR) and rectal (RT) and body surface (BST) temperatures were quantified in the morning. Additionally, in the morning, dry bulb (Tdb) and wet bulb (Twb) temperatures were measured, and then, relative humidity (RH) and a temperature-humidity index (THI) were calculated. Blood was collected to perform hemogram. The day before the calves were evaluated, thermal environment data were collected to verify whether there were cyclic periods of heat stress. The mean air temperature ranged from 19°C to 22.1°C, and the highest THI value of 68 occurred in the summer mornings. In the afternoon, the maximum air temperature ranged from 27.5°C to 29.7°C. In autumn, respiratory and heart rates and body surface temperature were higher in 2-day-old calves than in other ages. The body surface temperature of 60-day-old calves was higher in spring and summer than in autumn. Rectal temperature remained in the normal range throughout the study period. Season did not influence the erythrogram and plaquetogram. The values for red blood cells, MCV, MCHC, RDW, platelets, and MPV varied among the calf ages. Season did not influence the values of leukocytes, monocytes, lymphocytes, or N/L ratio; however, band neutrophils and eosinophils varied among seasons. Band neutrophils and monocytes were not altered by age, whereas leukocyte, segmented neutrophils, eosinophils, lymphocytes, and N/L ratio values varied with age among the calves.Discussion: The air temperature and THI remained within the thermoneutral zone of crossbred dairy calves in the morning; however, in the afternoon the air temperature and THI increased, which indicates cyclic periods of critical heat stress. Higher RR and HR values observed in 2-day-old calves may be due to the physiological changes that accompany adapting to extrauterine life. The RT remained within the reference range for species during all seasons and at all ages, and therefore, the calves were able to maintain normothermia. The air temperature remained lower than the BST and was within the thermoneutral zone; thus, the loss of sensible heat was predominant in relation to evaporation dissipation. Age, breed, time of day, and meteorological variables may influence hematological constituents. Red blood cells of newborn calves are large, of fetal origin, and are replaced by smaller cells with advancing age, which results in a smaller MCV value. The higher neutrophil concentrations in 2-day-old calves resulted in a higher N/L ratio following the trend of plasma cortisol concentration, which is high at birth and decreases with age. The highest values of band neutrophils are because these cells are responsible for phagocytosis of microorganisms and other foreign materials. Since new-born calves are in contact with microorganisms in the environment and are highly susceptible to infections, it is justifiable to observe an increased number of band neutrophils. The differences observed in lymphocyte numbers in calves aged 30 and 60 days during autumn, winter, and spring is likely due to the production of B lymphocytes as an exposure response to agents present in the environment. We conclude that seasons interfere with BST and neutrophil and eosinophil counts, while age affects thermophysiological variables, erythrogram, plaquetogram, and leukogram.

show abstract

“…Esta pesquisa foi realizada na Fazenda Experimental do Campus Glória da Universidade Federal de Uberlândia, localizada no município de Uberlândia, Triângulo Mineiro, extremo oeste do estado de Minas Gerais (MG), Brasil, 925 m de altitude, 18° 56' 56'' de latitude sul e 48° 12' 47'' de longitude oeste [17]. A temperatura média anual da cidade está entre 19ºC e 27ºC e, segundo a classificação de Köppen, seu clima é do tipo Aw, megatérmico, com chuvas no verão e inverno seco [22].…”

Section: Localunclassified

Most Appropriate Heat Stress Index for Half-blood Dairy Heifers

Brettas

Nascimento

Guimarães

et al. 2017

Acta Scientiae. Vet.

View full text Add to dashboard Cite

Background: Heat stress indexes integrate several variables of the thermal environment in a single figure and predict their impact on animal welfare and performance. The correct interpretation of these indexes is of help in the choice of more adequate measures to attenuate the stress caused by the heat. Therefore, the aim of this research is to examine some of the heat stress indexes mentioned in the literature and to decide which ones best reflect the potential impact of meteorological conditions on the thermal homeostasis of half-blood dairy heifers bred in Uberlândia, Triângulo Mineiro area, Minas Gerais, Brazil.Materials, Methods & Results: Eight half-blood dairy heifers were exposed to direct sunlight from 9 h to 13 h in the months of November and December of 2016, and also January and February of 2017, 5 days per month on average, in Uberlândia, MG, Brazil. After this challenge, the respiratory rate and the rectal temperature were measured. Simultaneously to the collection of physiological variables, the temperatures of dry bulb and wet bulb, as well as that of black globe, were quantified, as was the wind speed. Afterwards, the solar radiation, the relative humidity, the mean radiant temperature and some heat stress indexes were calculated, the latter being Temperature-Humidity Index, Black Globe-Humidity Index, Equivalent Temperature Index, Environmental Stress Index, Respiratory Rate Index, Thermal Load Index, Environmental Specification Index, Thermal Comfort Index for Dairy Cattle, Comprehensive Climate Index and Cattle Heat Stress Index. These indexes were, then, correlated with the physiological variables. The averages of room temperature, black globe temperature, solar radiation, wind speed, radiant temperature and relative humidity were, respectively, 29.96°C, 41.73°C, 831.02 W/m2, 0.11 m/s-1, 318.14 K and 50.51%. Rectal temperature averaged 38.8ºC while respiratory rate averaged 41.97 breaths per minute-1. Correlating the 10 heat stress indexes with these two physiological variables, it was verified that the highest values, with a confidence of 95%, were demonstrated by the Equivalent Temperature Index (0.200 and 0.317, respectively), followed by the Cattle Heat Stress Index (0.186 and 0.314, respectively).Discussion: Room temperature was within the thermoneutral zone for half-blood dairy cattle. Nevertheless, the mean radiant temperature and the black globe temperature were higher, due to intense solar radiation. Wind speed was not very expressive and relative humidity was close to what was required. The average values of rectal temperature and respiratory rate were normal, which indicated the heifers are adapted to the thermal environment. Regarding the heat stress indexes, the Equivalent Temperature Index was recommended, as it presented the highest amount of meaningful correlations with the physiological variables, followed by the Cattle Heat Stress Index and the Environmental Stress Index. The average value of the Equivalent Temperature Index remained in the “caution” category, according to the literature’s two existing scales for interpretation of said index’s results, indicating the occurrence of stress by heat, albeit not severe. In conclusion, the Equivalent Temperature Index is considered the most appropriate heat stress index for evaluating a heat stress situation in half-blood dairy heifers bred in Uberlândia, Triângulo Mineiro, followed by the Cattle Heat Stress Index and the Environmental Stress Index.

show abstract

Estrutura de áreas protegidas dos assentamentos de reforma agrária no município de Uberlândia-MG, Brasil: um estudo de ecologia de paisagem

Cited by 7 publications

References 16 publications

Dragonflies and Damselflies in a region of the Triângulo Mineiro, Minas Gerais: checklist and taxonomic additions

Dragonflies and Damselflies in a region of the Triângulo Mineiro, Minas Gerais: checklist and taxonomic additions

Effect of Season and Age on Thermophysiological and Hematological Variables of Crossbred Dairy Calves in Tropical Environment

Most Appropriate Heat Stress Index for Half-blood Dairy Heifers

Contact Info

Product

Resources

About