Effects of Climate on Reproduction in Cattle

Gwazdauskas, F.C.

doi:10.3168/jds.s0022-0302(85)80995-4

Cited by 82 publications

(40 citation statements)

References 72 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…During periods of heat stress, milk production, feed intake, and physical activity are decreased [11]. At the same time, reproductive ability is compromised [31,32]. The exposure of lactating cows to heat stress has been shown to cause a decrease in follicular growth and to reduce serum estradiol [33],which also concluded that decreased follicular size or decreased dominant follicle function occurred in lactating cows that were exposed to heat stress [34,35].…”

Section: Effects Of Heat Stress On Reproductionmentioning

confidence: 97%

See 1 more Smart Citation

Alleviating Heat Stress Leads to Improved Cow Reproductive Performance

Suadsong¹

2012

Milk Production - An Up-to-Date Overview of Animal Nutrition, Management and Health

View full text Add to dashboard Cite

Section: Effects Of Heat Stress On Reproductionmentioning

confidence: 97%

“…Climatic factors that may influence the degree of heat stress include: temperature, humidity, radiation and wind [32]. The upper critical temperature for heat stress begins between 25 and 26C [47].…”

Section: Effect Of Evaporative Cooling System On Embryonic Developmenmentioning

confidence: 99%

Alleviating Heat Stress Leads to Improved Cow Reproductive Performance

Suadsong¹

2012

Milk Production - An Up-to-Date Overview of Animal Nutrition, Management and Health

View full text Add to dashboard Cite

“…Environmental stressors such as drought, extremes of hot or cold temperatures, and food shortage impact reproduction and behavior in many species of birds (Lynn et al 2003;Wingfield, 1984) and mammals (Bronson, 1985;Gwazdauskas, 1985;Nelson, 1993;Nelson et al, 1989), including humans (Bronson, 1995) and non-human primates (Alberts et al, 2005, Beehner et al, 2006bBrockman and van Schaik, 2005;Sapolsky, 1986). These effects are in part mediated via increases in glucocorticoid (GC) concentrations (Astheimer et al, 1992;Kitaysky et al, 2001bKitaysky et al, , 2003reviewed by Boonstra, 2004;Landys et al, 2006;Romero, 2002 andKitaysky, 2002).…”

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

105

View full text Add to dashboard Cite

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.

show abstract

“…In addition to the environment temperature and relative humidity, reproductive performance is affected by wind and photoperiod (GWAZDAUSKAS 1985, ORIHUELA 2000.…”

Section: Introductionmentioning

confidence: 99%

The effect of some seasonal conditions on oestrus occurrence in cows

Bülbül

Ataman

2009

Arch. Anim. Breed.

View full text Add to dashboard Cite

In this study, the effect of climatic conditions on oestrus occurrence was investigated by using 9 972 oestrus records of cows recorded between 1995 and 2003. A distinct seasonal variation in the oestrus occurrence was determined. Oestrus occurrence observed in January, March, November and December was less than that in June and September (P<0.05). Annual distribution of the oestrus occurrence was positively correlated with environment temperature and insulation duration, but it was negatively correlated with rainfall (P<0.01). However, there was no relationship between oestrus occurrence and relative humidity. In addition to these, there was a slight decrease in the oestrus response when the temperature-humidity index (THI) was above 72; nevertheless, this decrease was not significant (P >0.05). The data presented in this study demonstrated that the increase in the environmental temperature up to 23 °C did not cause a suppressive effect on the ovarian activity. In conclusion, annual distribution of the oestrus occurrence is positively correlated with environment temperature and insulation duration whereas it is negatively correlated with rainfall in Holstein cows, in this study. Keywords: cattle, climatic conditions, oestrus response Zusammenfassung Einfluss der Jahreszeiten auf die Brunst bei KühenAn Hand von 9 927 Östrusdaten von Holsteinkühen aus den Jahren 1995 bis 2003 wurde der jahreszeitliche klimatische Einfluss auf das Brunstgeschehen bei Kühen untersucht. Grund war die Beobachtung einer saisonalen Veränderung des Östrusauftretens. So wurde ein geringeres Brunstauftreten in den Monaten Januar, März, November und Dezember gegenüber den Monaten Juni und September beobachtet. Die Datenanalyse ergab, dass signifikant das jahreszeitliche Östrusauftreten positiv mit der Umgebungstemperatur und der Sonnenscheindauer aber negativ mit der Niederschlagsmenge korreliert war. Keine Zusammenhänge fanden sich zwischen der relativen Luftfeuchtigkeit und dem Östrusgeschehen. Tendenziell wurde eine geringe Abnahme der Östren nachgewiesen, wenn der Wert des Temperatur-Feuchtigkeits-Indexes (THI) über 72 lag. Die Ergebnisse dieser Studie zeigen, dass Umgebungstemperaturen bis zu 23 °C die Ovarienaktivität nicht negativ beeinflussen. Zusammenfassend wird geschlussfolgert, dass bei dem vorliegenden Tiermaterial ein jahreszeitliches Östrusverhalten positiv mit BÜLBÜL and ATAMAN: The effect of some seasonal conditions on oestrus occurrence in cows 460 der Umwelttemperatur sowie der Sonnenscheindauer, jedoch negativ mit der Niederschlagsmenge korreliert ist.Schlüsselwörter: Kuh, Jahreszeit, Brunst

show abstract

Effects of Climate on Reproduction in Cattle

Cited by 82 publications

References 72 publications

Alleviating Heat Stress Leads to Improved Cow Reproductive Performance

Alleviating Heat Stress Leads to Improved Cow Reproductive Performance

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

The effect of some seasonal conditions on oestrus occurrence in cows

Contact Info

Product

Resources

About