Effect of Short-Term Elevated Dry-Bulb and Dew-Point Temperature on the Cycling Gilt3

D'Arce, Raul Dantas; Teague, H. S.; Roller, W. L.; Grifo, A. P.; Palmer, W. M.

doi:10.2527/jas1970.303374x

Cited by 19 publications

(6 citation statements)

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“…We measured gilt body temperature and performance in response to temperature and light intensity with body temperature and weight gain being affected. Changes in pig body temperature in response to their environment have been previously reported (Edwards et al, 1968;d'Arce et al, 1970;Omtvedt et al, 1971). In our study, gilts were restricted fed, and we noted no effects of room temperature on intake but did record changes in BW gain and body temperature.…”

Section: Discussionsupporting

confidence: 74%

Effect of variability in lighting and temperature environments for mature gilts housed in gestation crates on measures of reproduction and animal well-being1

Canaday

Salak‐Johnson

Visconti

et al. 2013

Journal of Animal Science

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The effects of room temperature and light intensity before breeding and into early gestation were evaluated on the reproductive performance and well-being of gilts housed individually in crates. In eight replicates, estrus was synchronized in mature gilts (n = 198) and after last feeding of Matrix were randomly assigned to a room temperature of 15°C (COLD), 21°C (NEUTRAL), or 30°C (HOT) and a light intensity of 11 (DIM) or 433 (BRIGHT) lx. Estrous detection was performed daily and gilts inseminated twice. Blood samples were collected before and after breeding for determination of immune measures and cortisol concentrations. Gilt ADFI, BW, and body temperature were measured. On d 30 postbreeding, gilts were slaughtered to recover reproductive tracts to evaluate pregnancy and litter characteristics. There were no temperature × light intensity interactions for any response variable. Reproductive measures of follicle development, expression of estrus, ovulation rate, pregnancy rate (83.2%), litter size (14.3 ± 0.5), and fetal measures were not affected by temperature or lighting (P > 0.10). Gilts in COLD (37.6°C) had a lower (P < 0.05) rectal temperature than those in NEUTRAL (38.2°C) and HOT (38.6 ± 0.04°C). Both BW gain and final BW were greater (P < 0.0001) for gilts kept in HOT than those in NEUTRAL or COLD environments. Cortisol was greater (P < 0.01) for gilts kept in COLD compared with those kept in the HOT room. Gilts housed in the HOT environment made more postural changes (P < 0.05) than did those kept in either COLD or NEUTRAL temperatures. Gilts kept in the HOT temperature spent more total time lying and more time lying ventrally compared with those gilts housed in the NEUTRAL or COLD rooms. Total white blood cells and the percentage of neutrophils as well as neutrophil-to-lymphocyte ratio were all influenced (P < 0.05) by temperature but there was no effect (P > 0.10) of light or interaction with temperature on other immune cells or measures. These results indicate that temperatures in the range of 15 to 30°C or light intensity at 11 to 433 lx do not impact reproduction during the follicular phase and into early gestation for mature gilts housed in gestation crates. However, room temperature does impact physiological, behavioral, and immune responses of mature gilts and should be considered as a potential factor that may influence gilt well-being during the first 30 d postbreeding.

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Section: Discussionsupporting

confidence: 74%

Effect of variability in lighting and temperature environments for mature gilts housed in gestation crates on measures of reproduction and animal well-being1

Canaday

Salak‐Johnson

Visconti

et al. 2013

Journal of Animal Science

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Section: Introductionmentioning

confidence: 99%

“…Results were generally interpreted as sensitivity of early embryonic development to elevated temperatures, although some of these experiments included final stages of in vivo oocyte maturation in the exposure interval (ovulation occurs approximately 40 h after the onset of oestrus in pigs). An early experiment suggested that oocyte quality might be compromised prior to fertilization and contribute to reduced reproductive efficiency (D'Arce et al 1970). However, effects on oocyte quality as discussed above for the bovine (Rocha et al 1998;Payton et al 2004;Roth and Hansen 2004) vs direct effects on postfertilization embryonic development have not been elucidated in the porcine system.…”

Section: Introductionmentioning

confidence: 99%

Reduced Immunolabelling of a Porcine Oocyte Membrane Protein Reflects Reduced Fertilizability of Porcine Oocytes Following Elevated Ambient Temperature

Berger

Roberts

2009

Reprod Domestic Animals

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Decreased fertility in pigs is a common occurrence during summer months. An objective of the current experiments was to evaluate if elevated ambient temperature altered the oocyte plasma membrane including potential receptors for sperm. This would potentially contribute to reduced fertilizability. Treated gilts were exposed in vivo to 32 degrees C for 12 h per day and 20 degrees C for the remaining 12 h per day for 7 days; control gilts were exposed to 22 degrees C for 12 h and 20 degrees C for the remaining 12 h each day. Cumulus-oocyte complexes were also aspirated from ovaries obtained from gilts maintained at thermoneutral ambient temperature and matured in vitro at 38.5 degrees C or 40 degrees C. Relative abundance of a porcine oocyte membrane protein was examined by intensity of immunolabelling of the in vivo and in vitro matured oocytes evaluated with confocal microscopy; fertilizability of the in vitro matured oocytes was evaluated in in vitro fertilization assays. Oocytes obtained from gilts exposed to elevated ambient temperature for 7 days had reduced immunolabelling compared with oocytes from control gilts (p < 0.05). Similarly, oocytes matured in vitro for 44 h at elevated ambient temperature had reduced immunolabelling and reduced fertilizability compared with oocytes matured at 38.5 degrees C (p < 0.01 and p < 0.05). These results suggest porcine oocyte quality is reduced by elevated ambient temperature and immunolabelling of oocytes with antibodies to specific membrane proteins may be effective to evaluate some aspects of oocyte quality.

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“…O tempo que o leitão leva para alcançar novamente v alores de temperaturas normais (39 o C) depende diretamente da temperatura ambiente, do seu 5 peso corporal e do momento em que começa a se amamentar (Bäckström & Curtis, 1981 (Thompinks et al, 1967;D`Arce et al, 1970).…”

Section: Exigências Térmicas Na Maternidadeunclassified

Avaliação do comportamento de leitões em diferentes sistemas de aquecimento por meio da análise de imagem e idenficação eletrônica

Pandorfi¹

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Effect of Short-Term Elevated Dry-Bulb and Dew-Point Temperature on the Cycling Gilt3

Cited by 19 publications

References 0 publications

Effect of variability in lighting and temperature environments for mature gilts housed in gestation crates on measures of reproduction and animal well-being1

Effect of variability in lighting and temperature environments for mature gilts housed in gestation crates on measures of reproduction and animal well-being1

Reduced Immunolabelling of a Porcine Oocyte Membrane Protein Reflects Reduced Fertilizability of Porcine Oocytes Following Elevated Ambient Temperature

Avaliação do comportamento de leitões em diferentes sistemas de aquecimento por meio da análise de imagem e idenficação eletrônica

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