High body weight gain and reduced bovine mammary growth: physiological basis and implications for milk yield potential

Sejrsen, K.; Purup, Stig; Vestergaard, Mogens; Foldager, J.

doi:10.1016/s0739-7240(00)00070-9

Cited by 133 publications

(145 citation statements)

References 30 publications

Supporting

Mentioning

111

Contrasting

Unclassified

Order By: Relevance

“…Similar estimated milk intake of the calves between treatments was consistent with the similarities in calf and heifer liveweight between treatments, and was in agreement with the finding of Sejrsen et al (2000). The estimates of milk intake of the calf, and by deduction, milk yield of the heifers in this study were high relative to reports from another study of angus heifers using the weigh-nurse-weigh technique (Pleasants & barton 1987), comparable to those reported in a study of mature angus cows milked using a portable milking machine on days 60 and 89 of lactation (brown et al 2001), and low relative to experiments using the weigh-nurse-weigh technique in Hereford × Friesian heifers (burke et al 1998;Peachey & Morris 1998).…”

Section: Discussionsupporting

confidence: 88%

Effects of liveweight gain during pregnancy of 15‐month‐old Angus heifers on dystocia and birth weight, body dimensions, estimated milk intake and weaning weight of the calves

Kenyon

López‐Villalobos

Morris

2008

New Zealand Journal of Agricultural Research

View full text Add to dashboard Cite

First-calving, 2-year-old heifers are particularly susceptible to dystocia caused by foetomaternal disproportion. Forty-four 15-month-old Angus heifers were allocated to either a moderate (583 ± 73 g/day) or low (193 ± 71 g/day) liveweight gain treatment for the first trimester (93 days) of pregnancy. Both groups were of similar liveweight at parturition. Birth weight of the calves and incidence of dystocia were not significantly different between treatment groups at 33.0 ± 0.7 kg, compared with 33.8 ± 0.6 kg and 12% compared with 22% for the moderate and low groups, respectively. Body dimensions, liveweight from birth to 205 days of age and estimated milk intake of the calves were generally not affected by treatment. Assisted calves had greater estimated milk intake than unassisted calves at 37 days of age (5.9 ±1.0 versus 4.1 ± 0.6 kg/day; P < 0.05). Liveweight gain in early pregnancy did not affect birth weight of calves or the incidence of dystocia in 2-year-old heifers.

show abstract

Section: Discussionsupporting

confidence: 88%

Effects of liveweight gain during pregnancy of 15‐month‐old Angus heifers on dystocia and birth weight, body dimensions, estimated milk intake and weaning weight of the calves

Kenyon

López‐Villalobos

Morris

2008

New Zealand Journal of Agricultural Research

View full text Add to dashboard Cite

show abstract

“…High growth rate during rearing in order to achieve sufficient body size for breeding heifers at a young age is the result of high energy consumption. This modifies the hormonal environment, which seems to impair mammary gland growth and consequently milk yield capacity during further lactations (Sejrsen et al, 2000). Zanton and Heinrichs (2005) published a meta-analysis based on eight experiments performed on the effect of pre-pubertal growth on firstlactation performance.…”

Section: Nutritional Factorsmentioning

confidence: 99%

Rearing strategy and optimizing first-calving targets in dairy heifers: a review

Cozler

Lollivier

Lacasse

et al. 2008

Animal

View full text Add to dashboard Cite

Much research has been carried out and published on dairy replacement management, in order to rear heifers as efficiently as possible, from both a technical and economical point of view. In most cases, the aim is to rear the heifers at the lowest cost possible without any deleterious effects on future performances. However, the importance of dairy heifer husbandry is not sufficiently well recognized and probably mishandled by most farmers. The present review aims to give an actual overview of rearing procedures in dairy heifers and possible ways to achieve optimal goals. For many years, it has been well known that rapid rearing lowers the age of sexual maturity and consequently may be an efficient way to reduce the non-producing period prior to conception. But this may impair mammary development and consequently future milk production, at least during first lactation. In addition, a growth rate that is too low may not only be costly but also result in animals that are too fat at first calving, creating problems such as calving difficulties, dystocia, etc. Genetic considerations must also be factored, i.e. frame, size, body weight, etc. have changed during the last 20 years and there are differences between breeds. As a result, some time-honoured recommendations may not be appropriate. The present paper reviews factors and management practices that may affect rearing and subsequent performance of dairy heifers.

show abstract

“…There are many factors affecting the reproductive efficiency of heifers, for example body weight (Chebel et al, 2007), metabolic status (Bergfeld et al, 1994;Ferguson, 2005), BCS (Sejrsen et al, 1999), heat stress (Wilson et al, 1998a) and sufficient ovarian activity (Fortune, 1993).…”

mentioning

confidence: 99%

A comparison of the follicular dynamics in heifers of the Czech Fleckvieh and Holstein breeds

Šichtař¹,

Tolman²,

Rajmon³

et al. 2010

CZECH J ANIM SCI

View full text Add to dashboard Cite

Differences in follicular development and repeatability of follicular growth pattern among Czech Fleckvieh (n = 20) and Holstein (n = 23) heifers were investigated. Follicular dynamics was evaluated by daily sonographic scanning during three interovulatory intervals. The mean duration of the interovulatory interval was 20.66 ± 0.32 days, no differences between breeds were observed. The proportion of the nonalterna-ting pattern was nearly the same as that of the alternating pattern (54% and 46%, respectively). The majority of IOIs ≤ 21 days were of the 2-wave pattern (71%) whereas only 29% of them were of the 3-wave pattern. Conversely, the majority of IOIs ≥ 22 days were of the 3-wave pattern (84%), whereas only 16% were of the 2-wave pattern. Differences could be observed in the Czech Fleckvieh heifers. Comparing 2-and 3-wave interovulatory intervals, 44.2% of the heifers exhibited 3 waves and 55.8% of the heifers exhibited 2 waves of follicular growth. The ratio of 3-to 2-wave heifers was about the same in the Holstein breed; in Czech Fleckvieh 2-wave cycles slightly dominated (11/12, 8/12; respectively). In Holstein heifers, the first follicular wave occurred 0.92 ± 0.15 days after ovulation in 2-wave interovulatory intervals, and the emergence of the first wave in 2-wave Czech Fleckvieh heifers appeared later (P < 0.05), 1.83 ± 0.3 days after ovulation. The maximal size reached by the dominant follicles in all animals and in the Czech Fleckvieh differed in the first and in the second wave of 2-wave cycles (P < 0.05). In 3-wave interovulatory intervals the dominant follicles in the second wave differed (P < 0.05) from the mean diameters of the first and the third wave in the Czech Fleckvieh. The ovulatory follicles were significantly (P < 0.05) smaller in 2-wave than in 3-wave interovulatory intervals among all animals and between the Holstein and Czech Fleckvieh heifers. In conclusion, we found a similar pattern of ovarian follicular dynamics in Czech Fleckvieh and Holstein heifers kept under identical nutritional and environmental conditions. Whether the significant difference in the emergence of the 1 st follicular wave in 2-wave IOIs between C and H heifers is of real biological significance is ambiguous.

show abstract

High body weight gain and reduced bovine mammary growth: physiological basis and implications for milk yield potential

Cited by 133 publications

References 30 publications

Effects of liveweight gain during pregnancy of 15‐month‐old Angus heifers on dystocia and birth weight, body dimensions, estimated milk intake and weaning weight of the calves

Effects of liveweight gain during pregnancy of 15‐month‐old Angus heifers on dystocia and birth weight, body dimensions, estimated milk intake and weaning weight of the calves

Rearing strategy and optimizing first-calving targets in dairy heifers: a review

A comparison of the follicular dynamics in heifers of the Czech Fleckvieh and Holstein breeds

Contact Info

Product

Resources

About