Parâmetros clínicos, hematológicos, bioquímicos e hormonais de bovinos submetidos ao estresse calórico

Ferreira, Fátima; Campos, Warley Efrem; Carvalho, A.Ú.; Pires, Maria de Fátima Ávila; Martinez, M. L.; Silva, M.V.G.B.; Verneque, R.S.; Silva, P.F.

doi:10.1590/s0102-09352009000400002

Cited by 31 publications

(20 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In Thailand, aiming to measuring the effects of immersion on the performance and physiology of female buffaloes, Khongdee et al (2011) reported that, in hot climates, immersion in water is enough to reduce cortisol levels (3.55±1.53 vs. 2.33±1.39 ng/mL, P<0.05). Researching the clinical, hematological, biochemical, and hormonal parameters in cattle subjected to heat stress, Ferreira et al (2009) reported a variation between the seasons of the year (P<0.05), with higher averages in summer (4.77±0.20 µg/dL) than winter (3.01±0.15 µg/dL). Differences (P<0.05) were also found between sexes, with higher serum levels for females (4.78±0.25 µg/dL) than for males (3.60±0.23 µg/dL).…”

Section: Resultsmentioning

confidence: 99%

Hormonal changes in female buffaloes under shading in tropical climate of Eastern Amazon, Brazil

et al. 2014

View full text Add to dashboard Cite

-The hormonal responses of 20 female buffaloes raised under the sun (SS group) or in the shade (CS group) in Belém, Pará, Brazil, were assessed. The CS group (n = 10) was kept in a silvopasture system featuring Racosperma mangium, whereas the SS group (n = 10) was kept in paddocks without shade featuring Brachiaria humidicola, drinking water, and mineral salt. The following parameters were measured for each treatment: dry-bulb temperature (AT), relative humidity (RH), and black-globe temperature in order to calculate the globe temperature and humidity index (GTHI). Blood sample collections to quantitatively determine levels of cortisol, triiodothyronine (T 3 ), and thyroxine (T 4 ) were performed every 14 days, at 13.00 h. Different seasons of the year were also assessed: rainy (January-April), transition (May-July), and less rainy (August-December). Analysis of variance revealed that AT and the index of global temperature and humidity (GTHI) differed between groups; specifically, higher values were found in the SS group, which shows how important silvopastoral systems are in buffalo farming in tropical climates. Relative humidity was significantly different across seasons and particularly high in the rainy season. The treatments influenced cortisol such that higher values were observed in the SS group. The highest mean cortisol levels were recorded during the rainy and less rainy seasons, whereas the highest T 3 and T 4 levels were recorded only during the rainy season. Triiodothyronine and thyroxine were negatively correlated with AT and GTHI and positively correlated with RH. Silvopastoral systems provide thermal comfort to buffaloes, and the less rainy season is more likely to cause heat stress.

show abstract

Section: Resultsmentioning

confidence: 99%

Hormonal changes in female buffaloes under shading in tropical climate of Eastern Amazon, Brazil

et al. 2014

View full text Add to dashboard Cite

show abstract

“…Além dos fatores já citados, observa-se também que a fase do ciclo estral é um elemento que exerce grande influência sobre o parâmetro mencionado (hematócrito). Isto pode explicar o fato da variabilidade dos parâmetros hematológicos encontrados neste estudo, visto que as novilhas encontravam-se em diferentes estádios reprodutivos, o que é corroborado pelos dados obtidos por Ferreira et al (2009).…”

Section: Resultsunclassified

Desempenho de novilhas mestiças em diferentes estádios reprodutivos

et al. 2010

View full text Add to dashboard Cite

ResumoForam utilizadas vinte e uma novilhas mestiças ½ Nelore vs ½ Aberdeen Angus, com idade aproximada de dezoito meses e peso médio de 307,90 kg. Os animais foram distribuídos em delineamento inteiramente casualizado, com três tratamentos e sete repetições. Os tratamentos foram compostos por: novilhas vazias, novilhas ovariectomizadas e novilhas com implante de cinqüenta esferas de chumbo esterilizadas no interior do corno uterino. As novilhas foram alimentadas com ração composta de 50% silagem de milho (MS) e 50% concentrado (MS), fornecida na base de 2,5% (MS) do peso vivo dos animais. As novilhas com implante de chumbo apresentaram ganho médio diário superior (P < 0,05) aos das novilhas ovariectomizadas e das vazias. Ainda, as novilhas ovariectomizadas apresentam ganho superior (P < 0,05) aos das novilhas vazias. Todavia, não houve diferença no que se refere ao rendimento de carcaça e cobertura de gordura. O valor do hematócrito aumentou nos três grupos de animais da primeira coleta (antes) para a segunda coleta (depois dos tratamentos). Todavia, este aumento foi maior (P < 0,05) nas novilhas vazias. Palavras-chave: Cio, chumbo, ganho em peso, ovariectomia Abstract Twenty-one crossbreeding heifers (½ Nelore vs ½ Aberdeen Angus) with about 307.90 kg of live weight and eighteen months of age were used in a complete randomized design with three treatments and seven repetitions. The treatments were: control heifers, ovariectomized animals and with fifty gunshot spheres in uterine corn. The heifers were fed with 50% of corn silage and 50% concentrated. The feed intake was about 2,5% weight live in dry matter. The heifers gunshot treatments showed was bigger weight gain than the heifers ovariectomized treatments and this more weight gains what control heifers treatments. There was not difference in carcass yield and fat covering amongst treatments. The hematocrito increased in three heifers groups in the first collection (before) for the second collection (after treatments). However, the increase was superior (P < 0,05) in the control heifers group.

show abstract

“…However, in order to properly interpret hemograms, it is necessary to consider the influence of certain variables: climatic and environmental conditions, nutritional state, pregnancy, lactation, management, race, gender, and age. Several studies report a hematocrit increase in animals under heat stress due to their high dependence on evaporative mechanisms as a way of maintaining their homeothermy, leading to a great hydric loss for the environment, with a relative hemoconcentration and increased red blood cell counts (SRIKANDAKUMAR et al, 2004;FERREIRA et al, 2009). When evaluating differences in the eritrogram components in goats, Silva.…”

Section: Resultsmentioning

confidence: 99%

Organic and conventional management in a Parda Alpina dairy goat production system in northeastern Brazil

et al. 2015

View full text Add to dashboard Cite

In this study, we compared organic and conventional management in a dairy goat production system in Angicos, Rio Grande do Norte, Northeastern Brazil. Twenty-six Parda Alpina dairy goats were used: 13 in organic management (OM) and 13 in conventional management (CM). The experimental design was completely randomized with two treatments and 13 repetitions. OM practices included estrus synchronization with the "male effect," an herbal-based treatment against endoparasitoses (an extract of lemon [Citrus limonum] and garlic [Allium sativum]) and the control of mastitis using the Embrapa Kit for manual milking with a rosemary pepper (Lippia sidoides) tincture. CM animals received synthetic hormones (Promone®, Prolise®, and Novormon®) for synchronization of estrus, ivermectin for endoparasitoses, and iodized alcohol for mastitis prevention aided by the Embrapa Kit for manual milking. No significant differences were observed between the management types in the pregnancy rate, FEC, FAMACHA© (Faffa Malan Chart) scores, physico-chemical composition of the milk, or somatic cell count (SCC). Both OM and MC had pregnancy rates of 61.54%. The mean values of the egg counts observed in the OM and CM were 24 and 35 eggs g -1 , respectively. The FAMACHA© scores were 1 or 2 and 2, 3, or 4 in OM and CM, respectively. The goats had average weights in OM of 48.53 kg and in CM of 55.92 kg. Milk production, fat, protein, lactose, total solids, and nonfat solids in OM (0.971 kg/day, 2,210, 2,322, 3,306, 7,866, 5,566, respectively) were slightly higher than those in CM (0.946 kg/day, 1,812, 1,812, 2.868, 6.74, 4.928). OM (904,860 cells/mL) and CM (1.02052 million cells/mL) SCC values were similar, with the OM within the acceptable range for milk goats. Organic management was equivalent to conventional management for weight gain, maintenance of animal health standards, reproductive and sanitary control, and milk quantity and quality, and is technically suitable for a dairy goat production system in semiarid conditions. Key words: Agroecology, male effect, internal parasites, herbal medicine, mastitis ResumoObjetivou-se neste trabalho comparar o manejo orgânico e convencional de um sistema de produção de caprinos leiteiros em Angicos, Rio Grande do Norte, Nordeste do Brasil. Foram utilizadas 26 cabras da Raça Parda Alpina em lactação, sendo 13 em manejo orgânico (MO) e 13 em manejo convencional (MC). O delineamento experimental foi o inteiramente casualizado, com dois tratamentos e 13 repetições. Os animais do MO foram submetidos à sincronização de estro com efeito macho, tratamento à base de fitoterápicos contra endoparasitoses (Extrato de limão (Citrus Limonium) e alho (Allium sativum), e no controle de mastite usando o Kit Embrapa de ordenha manual à base de alecrim pimenta (Lippia sidoides). No MC os animais receberam hormônios sintéticos (Promone-e®, Prólise® e Novormon®) para a sincronização do estro, Ivermectina para endoparasitoses e álcool iodado para prevenção de mastite auxiliado pelo Kit Embrapa de ordenha manual. N...

show abstract

Parâmetros clínicos, hematológicos, bioquímicos e hormonais de bovinos submetidos ao estresse calórico

Abstract: Parâmetros clínicos, hematológicos, bioquímicos e hormonais de bovinos submetidos ao estresse calórico [Clinical, hematological, biochemical, and hormonal

Cited by 31 publications

References 10 publications

Hormonal changes in female buffaloes under shading in tropical climate of Eastern Amazon, Brazil

Hormonal changes in female buffaloes under shading in tropical climate of Eastern Amazon, Brazil

Desempenho de novilhas mestiças em diferentes estádios reprodutivos

Organic and conventional management in a Parda Alpina dairy goat production system in northeastern Brazil

Contact Info

Product

Resources

About