Climate factors affecting conception rate of high producing dairy cows in northeastern Spain

García-Ispierto, Irina; López‐Gatius, F.; Bech-Sàbat, G.; Santolaria, P.; Yániz, J.L.; Nogareda, C.; Rensis, F. De; López-Béjar, Manel

doi:10.1016/j.theriogenology.2007.02.009

Cited by 191 publications

(140 citation statements)

References 25 publications

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“…However, rapid worldwide progress in genetics of high producing dairy herds, reproductive efficiency has been suffered a dramatic decrease since the mid 1980s (Garcia-Ispierto et al, 2007). The decline in fertility in modern dairy cows is major concern, because the profitability of dairy herds greatly depends on fertility which has been often linked to a rising milk yield in high producing dairy cattle (L ucy, 2001).…”

Section: Introductionmentioning

confidence: 99%

The effect of calving season on reproductive performance of Jersey cows

Soydan

Kuran

2017

Mljekarstvo

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Dairy records, containing 1269 lactation record of 462 Jersey dairy cows collected over 16 years, from an agricultural state farm were used. Data for reproductive performance of cows were also collected. Means of the herd for lactation milk yield, calving interval, days open, interval from calving to the first insemination, lactation length, gestation length and dry period were 3195.7±20.2 kg, 366.6±1.7 d, 92.9±1.6 d, 78.0±1.3 d, 301.7±1.1 d, 275.2±0.2 d and 69.3±0.8 d, respectively. The effect of calving season (winter, spring, summer and autumn) on reproductive performance for high, low and moderate milk-yield cows was investigated. Calving season affected the days from calving to first insemination in high and moderate yielding cows (P<0.001) while didn't affect low yielding cows. In summer, days open in high yielding cows were 35 days longer compared to winter season (P<0.001) as observed for moderate yielding cows (P<0.01). In high yielding cows, calving interval was 18 days longer in spring compared to winter calving season. Calving season also affected the first service conception rate in high yielding cows (P<0.05). Services per conception in autumn were lower than the other seasons (P<0.001). In conclusion, high yielding dairy cows need more attention in summer season with respect to body condition score, dietary energy: protein ratio, uterus health and elimination of heat stress, to get more profit in dairy farm.

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Section: Introductionmentioning

confidence: 99%

The effect of calving season on reproductive performance of Jersey cows

Soydan

Kuran

2017

Mljekarstvo

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“…Among the environmental conditions related to productivity are the temperature [26], the relative humidity [27], the solar radiation [28], the wind speed [29], the length of day [30] and the daily rainfall [31]. In this case, the high precipitation could be one of the most important factors contributing to declining milk production in these areas, where the highly acidic soil, poor in microelements and low fertility, limiting the suitable growth and the protein content of the pastures [32].…”

Section: Discussion Age At First Calvingmentioning

confidence: 99%

Effect of Age at First Calving on First Lactation Milk Yield in Holstein Cows from Costa Rican Specialized Dairy Herds

Salazar-Carranza¹,

Castillo-Badilla²,

Murillo-Herrera³

et al. 2014

OJVM

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“…In vitro models of oocyte maturation, fertilization and development of bovine embryos (Duszewska et al, 2010) allow for the examination of the processes related to thermosensitivity and thermoresistance of gametes and embryos (García-Isperito et al, 2007;Zeron et al, 2001). In most in vitro experiments, stress was induced by increasing temperature of culture to 40.5-41EC and the control temperature ranged between 38.5 and 39EC.…”

Section: The Influence Of Elevated Air Temperature On Bovine Fertilitmentioning

confidence: 99%

“…This is important especially for domestic animals like cattle, sheep, goats or horses, which are more exposed to sun radiance and elevated temperature as compared to laboratory animals. Due to their physiology, cattle are especially sensitive to higher temperature (Hansen and Arechiga, 1999;García-Isperito et al, 2007;Roth et al, 2000). The optimal air temperature for cattle is approximately 20EC when the physiological body temperature ranges between 38.5 and 39EC.…”

Section: Introductionmentioning

confidence: 99%

“…The optimal air temperature for cattle is approximately 20EC when the physiological body temperature ranges between 38.5 and 39EC. Elevation of the air temperature above 27EC causes elevation of body temperature to 40-42EC, which is defined as hyperthermia (García-Isperito et al, 2007). Hyperthermia in cattle leads to adverse changes in the functioning of their reproductive organs, course of reproductive cycle and pregnancy (Hansen and Arechiga, 1999).…”

Section: Introductionmentioning

confidence: 99%

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The application of in vitro cattle embryo production system to study the influence of elevated temperature on oocyte maturation, fertilization and early embryonic development

Rynkowska¹,

Rapala²,

Trzeciak³

et al. 2011

bta

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Higher air temperature in summer causes a significant reduction in fertility in cattle. Increase in female body temperature during the period of reproduction by only 2EC, also known as hyperthermia, leads to disturbances in the functioning of the female reproductive system, oocytes maturation, fertilization and embryos development. Particularly sensitive to high temperatures are embryos in the first and second day after fertilization (thermosensitive), but just at third till fifth day after fertilization their resistance to thermal stress significantly increases. Morula-stage and blastocyst-stage bovine embryos are insensitive to elevated temperatures (thermoresistant). Most probably this is due to the increasing number of cells within the embryo and the capacity to activate defense mechanisms based on the synthesis of various factors providing resistance to high temperatures. These factors include heat shock protein 70 (HSP70), antioxidants such as glutathione, and IGF-1. One of the responses of the embryo to elevated temperature is the induction of apoptosis, which is associated with the activation of embryonic genome. Owing to the apoptosis, cells damaged by high temperature may be eliminated from the embryo, which increases their chance of survival. Precise examination of the mechanisms responsible for the development of thermotolerance of preimplantation bovine embryos will enable their protection from the consequences of elevated temperature. The aim of this review is to summarise experiments in which in vitro embryo production system was used to estimate the influence of elevated temperature on cattle fertility.

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Climate factors affecting conception rate of high producing dairy cows in northeastern Spain

Cited by 191 publications

References 25 publications

The effect of calving season on reproductive performance of Jersey cows

The effect of calving season on reproductive performance of Jersey cows

Effect of Age at First Calving on First Lactation Milk Yield in Holstein Cows from Costa Rican Specialized Dairy Herds

The application of in vitro cattle embryo production system to study the influence of elevated temperature on oocyte maturation, fertilization and early embryonic development

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