Heat stress causes excessive drinking in fed and food deprived pregnant goats

Olsson, Kerstin; Josäter-Hermelin, M.; Hossaini-Hilali, J.; Hydbring, E.; Dahlborn, K.

doi:10.1016/0300-9629(94)00186-w

Cited by 43 publications

(22 citation statements)

References 23 publications

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“…Como se pode observar na Tabela 6, a raça Guzerá obteve valores menores em CFDN (%PV) aumentando, assim, os demais consumos. Para Olsson et al (2004) o estresse térmico pode reduzir a ingestão de alimento, devido à taxa metabólica reduzida que resulta em sinais de feedback, indicando exigências menores de saída de energia, fato que não ocorreu no presente experimento, em que os animais estiveram em estresse térmico nos horários mais quentes do dia e mantiveram um consumo acima do estabelecido. CONCLUSÕES 1.…”

Section: Resultsunclassified

Termorregulação e desempenho de tourinhos Sindi e Guzerá, no agreste paraibano

Furtado¹,

Peixoto²,

Regis³

et al. 2012

Rev. bras. eng. agríc. ambient.

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R ESU M ONeste trabalho objetivou-se avaliar os índices bioclimáticos que influenciam as varáveis fisiológicas, desempenho e consumo de nutrientes de tourinhos das raças Gir e Guzerá. O estudo foi realizado na Estação Experimental de Alagoinha/EMEPA-PB, no município de Alagoinha, no agreste paraibano, Brasil, utilizando-se 16 tourinhos das raças Sindi e Guzerá (8 animais de cada raça), com média de 31,5 ± 1,5 meses de idade, mantidos confinados. O delineamento estatístico utilizado foi o de blocos inteiramente casualizados, com 8 repetições, em parcelas subdivididas, com raça na parcela principal e horários (6, 12 e 16 h) na subparcela. A temperatura retal, frequência respiratória e temperatura superficial dos animais se mantiveram dentro da faixa considerada normal para a espécie bovina. Não houve influência negativa no consumo de nutrientes e os animais tiveram um desempenho em ganho de peso acima do esperado, demonstrando que estão adaptados às condições de Nordeste brasileiro, já que não houve alterações em seus parâmetros fisiológicos, considerados dentro da faixa normal e ainda apresentaram excelente desempenho produtivo e de consumo de nutrientes.Palavras-chave: adaptabilidade, ambiência, desempenho produtivo Thermoregulation and performance of Sind and Guzera young bulls in 'Agreste' region of Paraiba State A B ST R A C T The objective of this study was to evaluate the bioclimatic indices that influence physiological variables, performance and nutrient intake by Gir and Guzera young bulls. The work was conducted at the Experimental Station of Alagoinha/EMEPA-PB in Alagoinha town in 'Agreste' region of Paraiba state, Brazil, using 16 young bulls of Sind and Guzera breeds (8 animals of each breed), with a mean 31.5 ± 1.5 months of age, kept under confined conditions. The statistical design used was randomized blocks with eight replications in split plot with breed in the main plot and time (6, 12 and 16 h) as subplots. Rectal temperature, respiratory rate and surface temperature of the animals remained within the normal range for the bovine species. There was no negative influence on food intake and the animals had weight gain higher than expected, demonstrating that they are adapted to the conditions of northeastern Brazil, since there were no changes in their physiological parameters considered within the normal range and still showed excellent growth performance and nutrient intake.

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Section: Resultsunclassified

Termorregulação e desempenho de tourinhos Sindi e Guzerá, no agreste paraibano

Furtado¹,

Peixoto²,

Regis³

et al. 2012

Rev. bras. eng. agríc. ambient.

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“…O aumento do hematócrito pode ser justificado pelo aumento relativo no número de hemácias (Costa et al, 1985). Esses altos valores revelam que bovinos estressados pelo calor apresentam hemoconcentração causada pela perda de líquidos corporais resultante dos mecanismos de dissipação de calor (sudorese e ofego) na tentativa de mantença da temperatura dentro dos limites fisiológicos (Olsson et al, 1995;Srikandakumar e Johnson, 2004). Entretanto, respostas diferentes podem ser verificadas, como as relatadas por Koga et al (1998) Médias seguidas por letras distintas minúsculas na coluna e maiúsculas na linha indicam diferença entre estações e entre períodos, respectivamente (P<0,05).…”

Section: Resultsunclassified

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

Ferreira¹,

Campos²,

Carvalho³

et al. 2009

Arq. Bras. Med. Vet. Zootec.

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“…The majority of research has been on single acute stressors, either approached through experimental laboratory studies or, in a few cases, through nonexperimental evaluation of acute natural stressors in the field. In experimental laboratory studies, researchers have usually created such stressors by exposing animals to various single environmental stressors for short period: extreme heat (Larsson et al, 1983;Lowe et al, 2002;Olsson et al, 1995Olsson et al, , 1996; review by Silanikove, 2000); cold temperatures (DeVries et al, 1997;Filipovic, 2007); food or water deprivation (Astheimer et al, 1992;Dunlap, 1995;Li et al, 2000;Lynn et al, 2003;Tsuma et al, 1996; see also review by Harvey et al, 1984). A few experiments have used a combination of two acute stressors simultaneously, e.g.…”

Section: Introductionmentioning

confidence: 99%

“…A few experiments have used a combination of two acute stressors simultaneously, e.g. heat stress in either food deprived animals (Olsson et al, 1995) or in water deprived animals (Lowe et al, 2002;Olsson et al, 1996, see also review by Silanikove, 2000).…”

Section: Introductionmentioning

confidence: 99%

Coping with a challenging environment: Effects of seasonal variability and reproductive status on glucocorticoid concentrations of female baboons (Papio cynocephalus)

Gesquiere

Khan

Shek

et al. 2008

Hormones and Behavior

107

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Environmental stressors impact physiology and behavior in many species of animals. These effects are partly mediated through changing concentrations of glucocorticoids, which also vary with reproductive state and social conditions. Prior research has focused largely on seasonal breeders, but the close temporal linkage between season and reproductive state in these species hinders ability to disentangle environmental effects from those of the animal's reproductive status. Here we assessed the effects of environmental challenges on the fecal glucocorticoid (fGC) levels of non-seasonal breeders, female baboons (Papio cynocephalus) of Amboseli, Kenya. Amboseli is characterized by a long dry season, during which food and water become scarce, and by extreme temperatures above 40°C in the shade during some months of the year. We found that after accounting for female reproductive status and individual variability, females exhibited higher fGC levels during the dry season than during the wet season. Further, during the wet season, fGC levels were higher in months of high average daily maximum temperatures. During the dry season, fGC levels were elevated both in hotter months and in months during which the baboons spent a relatively high proportion of time feeding. In spite of these stressors, female baboons reproduce during all months of the year in Amboseli, unlike most other mammals in this environment. This may be attributable to their extreme adaptability, specifically their diversified diet, and their ability to modify their behavior, including their activity profiles.

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Heat stress causes excessive drinking in fed and food deprived pregnant goats

Cited by 43 publications

References 23 publications

Termorregulação e desempenho de tourinhos Sindi e Guzerá, no agreste paraibano

Termorregulação e desempenho de tourinhos Sindi e Guzerá, no agreste paraibano

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

Coping with a challenging environment: Effects of seasonal variability and reproductive status on glucocorticoid concentrations of female baboons (Papio cynocephalus)

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