Navegando por Autor "GARCIA, Alexandre Rossetto"

Agora exibindo 1 - 6 de 6

Acesso aberto (Open Access)
Adição de óleo de palma na dieta sobre a lipidemia e a qualidade do sêmen de bubalinos (Bubalus bubalis)
(2014-02) SILVA, Geanne Rocha da; GARCIA, Alexandre Rossetto; FATURI, Cristian; LOURENÇO JÚNIOR, José de Brito; NAHÚM, Benjamim de Souza; GONÇALVES, Arnaldo Algaranhar; KAWHAGE, Priscila Reis; SILVA, Luiza Helena Meller da; MENESES, Andre Marcelo Conceição
The study aimed to investigate the effect of dietary supplementation with palm oil on serum lipid profile, the seminal characteristics of buffaloes (Bubalus bubalis) and the correlations between them. Twelve bulls were divided into Group CONT (n = 5) or Group OIL (n = 7). Animals in both groups were fed with isoproteic diets composed of corn silage and concentrated (ground corn, wheat bran and urea), with 50% forage/concentrate ratio, during 130 days (Periods 1 and 2). Palm oil (2%DM) was added to diet offered to Group OIL. Semen and blood samples were collected every two weeks. Increased serum levels of cholesterol, HDL and total lipids were observed for Group OIL, while the period influenced on cholesterol, LDL, total lipids and VLDL (P<0,05). Treatment decreased gross motility (P<0.05) and slightly reduced sperm membrane integrity (P<0.05) in animals of Group OIL. There were significant correlations between triglycerides and minor defects (r=-0.412, P=0.006), LDL and total defects (r=-0.333, P=0.030), total lipids and minor defects (r=-0.366, P=0.017), VLDL and spermatic viability (r=0.381, P=0.012), and total lipids and totals defects (r=-0.309, P=0.046), highlighting positive effects of higher lipid serum levels on sperm morphology and viability. The incorporation of palm oil in the diet altered the serum lipid profile, but it showed no positive effect on seminal parameters related to the potential of bull fertility.
Acesso aberto (Open Access)
Assessment of surface temperatures of buffalo bulls (Bubalus bubalis) raised under tropical conditions using infrared thermography
(FEPMVZ Editora, 2016-04) BARROS, Daniel Vale; SILVA, Lílian Kátia Ximenes; KAHWAGE, Priscila Reis; LOURENÇO JÚNIOR, José de Brito; SOUSA, Jailson Silva; SILVA, André Guimarães Maciel e; FRANCO, Irving Montanar; MARTORANO, Lucieta Guerreiro; GARCIA, Alexandre Rossetto
This paper aimed to evaluate the surface temperatures of buffalo bulls using infrared thermography, considering four distinct anatomical parts over time, and to correlate surface temperatures and thermal comfort indexes. The humid tropical climate (Köppen's Afi) was predominant in the research station where the experiment was performed and the trial lasted from April to August. Ten bulls (n=10) were evaluated every 25 days (morning: 6:00-9:00; afternoon: 12:00-15:00) and the parameters assessed were respiratory rate (RR), rectal temperature (RT), and the thermograms of surface temperature for orbital area (ORB), right flank (RF), left flank (LF) and scrotum (SCR). Climatological data was continuously monitored and the Temperature and Humidity Index (THI) and the Index of Comfort of Benezra (ICB) were calculated. The average values of THI were ≥78, and significant differences between shifts were observed (P<0.05). The ICB ranged from 1.96 to 2.25 and significant differences were observed for shiftsand throughout the months (P<0.05). The averages of surface temperatures were RT=38.2±0.5°C, ORB=36.1±0.8°C, LF=33.5±2.5°C, RF=35.4±1.7ºC and SCR=33.3±1.1°C, which exhibited significant differences for shifts and throughout the months (P<0.05). Positive correlations were obtained between THI and ORB (0.72), RF (0.77), LF (0.75) and SCR (0.41) (P<0.0001). The maximum temperature of ORB showed the highest correlation with RT (0.58, P<0.0001). Therefore, the surface temperatures are subject to climatic variations and increase throughout the day, due to the variation in thermal comfort indexes, and the maximum ORB temperature was the parameter most related to rectal temperature. Lastly, the results indicate that IRT may be a useful non-invasive and accurate tool to detect the variations in ORB, LF, RF and SCR temperature in buffalo bulls.
Acesso aberto (Open Access)
Biometria testicular, eletroejaculação e características seminais de caititus, Tayassu tajacu Linnaeus, 1758 (Mammalia, Artiodactyla, Tayassuidae) mantidos em cativeiro na Amazônia Oriental
(Instituto Nacional de Pesquisas da Amazônia, 2010-12) KAHWAGE, Priscila Reis; GARCIA, Alexandre Rossetto; GUIMARÃES, Diva Anelie de Araújo; OHASHI, Otávio Mitio; RAMOS, Rosemar Silva Luz; DIAS, Hilma Lúcia Tavares; ALBUQUERQUE, Natália Inagaki de; BARTHA, Mário Mansour Pinheiro
Research development in semen collection and sperm evaluation of Tayassu tajacu are necessary. The aims of this research were to evaluate testicular biometry of captive collared peccaries, test electroejaculation for semen collection and evaluate seminal characteristics during the year. Eight animals were submitted to electroejaculation and semen samples were evaluated according their physical and morphological characteristics. Left testicles measured 3.8 ± 0.4 cm X 2.6 ± 0.3 cm and presented 2.3 ± 0.2 of consistence, while right testicles were 3.8 ± 0.5 cm X 2.7 ± 0.3 cm and presented 2.3 ± 0.2 of consistence. Success rate on semen collections achieved 75.21%. Semen presented 0.81 ± 0.86 mL (volume), 137.44 ± 153 x 106 sptz mL-1 (sperm concentration), 7.92 ± 0.73 (pH), 52.66 ± 28.79% (sperm motility), 2.2 ± 0.8 (vigour), 55.84 ± 28.55% (plasmatic membrane integrity), 22.87 ± 12.93% (primary defects), 9.11 ± 5.88% (secondary defects) and 31.52 ± 13.81% (overall defects). Seminal characteristics showed no expressive variation along the year. Testicular symmetry was observed, electroejaculation was an efficient method to semen collection and slight mensal oscillations of seminal quality were not enough to characterize collared peccaries as seasonal reproductive animals.
Acesso aberto (Open Access)
Carcass quality of buffalo (Bubalus bubalis) finished in silvopastoral system in the Eastern Amazon, Brazil
(2012-08) PEIXOTO, Maria Regina Sarkis; LOURENÇO JÚNIOR, José de Brito; FATURI, Cristian; GARCIA, Alexandre Rossetto; NAHÚM, Benjamim de Souza; LOURENÇO, Lúcia de Fátima Henriques; SILVA, Luiza Helena Meller da; OLIVEIRA, Kelly Cavalcanti Conor de
The influence of the diet on the quality of buffalo (Bubalus bubalis) carcasses of crossbred Murrah and Mediterranean, concentrate fed on traditional (corn/soybean) or on agro-industrial residues (palm oil and coconut cakes) was studied. The animals were sacrificed in a slaughterhouse, and physical and physical-chemical analyses in the carcasses were carried out after 24 hours, and instrumental color and texture analyses of the Longissimus dorsi were carried out 48 hours after cooling. The animals supplemented with palm oil cake had better carcass conformation and fat trim, and differences (P<0.05) in the percentage of fat in the carcass fat thickness and coverage were observed.
Acesso aberto (Open Access)
Conforto ambiental de bezerros bubalinos (Bubalus bubalis Linnaeus, 1758) em sistemas silvipastoris na Amazônia Oriental
(Instituto Nacional de Pesquisas da Amazônia, 2010-12) MORAES JUNIOR, Raimundo José; GARCIA, Alexandre Rossetto; SANTOS, Núbia de Fátima Alves dos; NAHÚM, Benjamim de Souza; LOURENÇO JÚNIOR, José de Brito; ARAÚJO, Cláudio Vieira de; COSTA, Norton Amador da
This aim of the study was evaluating effects of two different silvopastoral systems on environmental comfort and changes in physiological parameters of buffalo calves bred in the Eastern Amazon. The experiment was conducted at Embrapa Amazônia Oriental, Belém-PA, (Afi climate type) in two periods of the year: Period 1 (April to Sep/2007) and Period 2 (Oct/2007 to March/2008). Eleven calves were included in the Silvopastoral System 1 (SSP1), with a useful shaded pasture area of 18 to 21%; and eight calves were included in the Silvopastoral System 2 (SSP2), without shading, but with a lake for swimming. Physiological status of animals bred in the two SSP's were measured (rectal temperature-RT; respiratory frequency-RF and skin temperature-ST). The Temperature and Humidity Index (THI) and Benezra´s Animal Comfort Index (ACI) were calculated, in two phases of the year, and were compared by the Tukey test (P < 0.05). THI ranged from 73.5 ± 1.3 to 82.2 ± 0.8. RT was 38.3 ± 0.26 to 39.3 ± 0.38 °C, but within the normal range for buffalo. RF ranged from 32.2 ± 9.2 to 56.5 ± 19.0 mov min-1, above the levels considered normal, and ST ranged from 23.6 ± 8.3 and 31.7 ± 5.4 °C. In both periods of the year and the two SSP's, ACIs were considered higher than ideal, ranging from 2.46 ± 0.33 to 3.31 ± 0.62 (SSP1) and 2.42 ± 0.30 to 3.45 ± 0.66 (SSP2).
Acesso aberto (Open Access)
Perfil hematológico de búfalas da raça Murrah, criadas ao sol e à sombra, em clima tropical da Amazônia Oriental
(Instituto Nacional de Pesquisas da Amazônia, 2011) SILVA, Jamile Andréa Rodrigues da; ARAÚJO, Airton Alencar; LOURENÇO JÚNIOR, José de Brito; VIANA, Rinaldo Batista; SANTOS, Núbia de Fátima Alves; GARCIA, Alexandre Rossetto
We evaluated the hematologic responses of 20 female buffaloes raised under full sun (group NS) and shade (group SG) at Belem, Para, Brazil. The animals in the SG group (n = 10) were maintained in paddocks under a silvopastoral system with Racosperma mangium, and the ones in the NS (n = 10), in paddocks with Brachiaria humidicola, with drinking water and mineral salt, but without access to shade. Air temperature (AT), relative air humidity (RH) and black global temperature (BGT) were measured for each treatment. Blood sampling for erythrogram and leukocyte count were undertaken at intervals of 14 days, and carried out at 1:00 p.m., during 2009. AT and black global temperature and humidity index (BGHI) were different (P < 0.05) throughout the year, and their highest values were observed in the NS group. During the rainier period, the SG group presented the highest values of leukocytes (P < 0.05), although in the transition and low rainy periods, the highest values were observed in the NS group. In the low rainy period, the erythrocytes count showed the highest values in the NS group. The highest levels of hemoglobin (P < 0.05) were observed during the transition and low rainy periods. Only hemoglobin presented a significant and negative (P < 0.05) correlation with RH. We concluded that the female Murrah buffaloes are subject to a hostile environment, and that the low rainy period is the most favorable for causing heat stress.