Multiple Births in Norwegian Cattle

Auran, Torbj⊘rn

doi:10.1080/00015127409434193

Cited by 7 publications

(5 citation statements)

References 7 publications

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“…Although the heritability of twinning is too low to allow for easy selection for or against the occurrence (3,5,13), with a rise in production from both improved management schemes and genetic superiorities, the incidence of twinning can be expected to increase (1). Since there are no clear advantages to twinning and, in fact, disadvantages as shown in this study, induction of twinning in dairy cattle cannot be recommended.…”

Section: Results Inmentioning

confidence: 74%

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Effects of Twinning on Lactation and Days Open in Holsteins

Chapin¹,

Vleck²

1980

Journal of Dairy Science

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Effects of twinning on lactation and days open in Holsteins were studied from calving records compiled by member surveys of Eastern Artificial Insemination Cooperative. Records of cows with 305-day mature-equivalent records from the Northeast Dairy Records Processing Laboratory were grouped according to whether the twin calving was associated with dystocia. Records of each cow that had a twin calving were paired with records of a single-calving control herdmate. In the twin group of 175 cows associated with dystocia, twin pregnancy had no effect on production; milk and fat production in the lactation initiated by twinning was depressed (137 kg and 7 kg) although not significantly; and days open following twin calving was increased. In the twinning group of 367 cows with no dystocia at twinning, milk and fat production were depressed by 285 kg and 14 kg in the lactation initiated by the twinning. Days open after twinning were increased by about 22 days. These results indicate a negative economic effect of twinning on lactation performance in Holstein cattle. Increased rates of twinning via selection or artificial induction of twinning dairy cattle appear not to be desirable.

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Section: Results Inmentioning

confidence: 74%

“…Twinning has decreased milk yield in some studies (2,11,14) but in others has increased yield (1,12,15). Effects of increased dystocia (5,9) or of prolonged calving interval following twinning (2,4,9,11) also are important considerations.…”

Section: Introductionmentioning

confidence: 99%

Effects of Twinning on Lactation and Days Open in Holsteins

Chapin¹,

Vleck²

1980

Journal of Dairy Science

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“…The subsequent metabolism of the steroid oestradiol slows down the natural decline in follicle stimulating hormone, which means that follicles have more time to undergo physiological changes before they ovulate. (Bowman and Hendy, 1970;Hendy and Bowman, 1970;Bar-Sy rstad, 1977;Chapin and Van Vleck, 1980) bu t Anan and Bowman, 1974 ;Suchanek, 1977 ;Syrstad, 1977;Chapin and Van Vleck, 1980) but do not support results of (Auran, 1974;Syrstad , 1974;Wood, 1975;Kay, 1978;Wood, 1984;Eddy et al, 1991). In other studies reported by (Nielen et al, 1989;Bell and Roberts, 2007) there was no significant difference in 305-d milk yield between twin and single calvers.…”

Section: Resultsmentioning

confidence: 92%

“…Other factors have been found to be associated with twinning, including use of antibiotics or reproductive hormones, ovarian cysts, days open, and peak milk production (Pfau et al, 1948;Johansson et al, 1974;Nielen et al, 1989;Ryan and Boland, 1991;Lopez-Gatius et al, 1996;Kinsel et al, 1998;Wiltbank et al, 2000).Studies of the effects of twin births on milk production in the subsequent lactation are contradictory. Cows with twins had greater milk production than cows with singletons (Auran, 1974;Syrstad, 1974;Wood, 1975;Kay, 1978;Wood, 1984;Eddy et al, 1991) while in others lower milk yields were recorded (Bar-Anan and Bowman, 1974;Suchanek, 1977;Syrstad, 1977;Chapin and Van Vleck, 1980). Effect of twinning on birth weight, weaning weight and growth of calves has been investigated in several studies (Bellows et al, 1971;Turman et al, 1971;Bellows et al, 1974;Johansson et al, 1974;Davis et al, 1989;Gregory et al, 1990Gregory et al, , 1996Echternkamp and Gregory, 2002;Bell and Roberts, 2007).…”

mentioning

confidence: 99%

Twinning in dairy cattle and its effect on milk yield, lactation length, dry period length and calf performance

Mostafa

2009

Journal of Veterinary Medical Research

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The twinning rate in a herd of Holstein dairy cattle and its effect on lactation and calf performance was investigated by using records of 5815 calving events. Data from twin calving Holstein cows in (TEC-DAP) farm in Al-Fayum Governorate between January 1997 and April 2008 were compared to those giving singles to study the differences in subsequent milk yield, previous and subsequent lactation and dry period length, as well as calf performance. The obtained average twinning rate was 1.4% during the period of the study. Cows giving twins had a significantly (p<0.01) lower daily, peak and 305-d milk yields than those with singles. There was no significant difference (p>0.05) in previous and subsequent lactation and dry period length between cows calving twins or singles. Calves born as twins were significantly (p<0.005) lighter at birth and weaning time than single calves, whereas total birth weight and total weaning weight were significantly (p<0.005) increased for twins than singles. Daily body weight gain from birth to weaning was significantly lower (p<0.005) for twin than single calves. Twinning in dairy cattle has a negative depressive effect on subsequent milk yield. Calf weight produced at weaning per cow calving can be increased in cows producing twins relative to cows producing singles. Alleviation of twinning constraints including dystocia, reduced calf survival and low reproductive performance requires improved management practices and early diagnosis of cows gestating twins in order to provide higher nutritive requirements in the last trimester of gestation and proper timing of drying off, and for higher assistance requirements at parturition. Thus, due to the increased disadvantages which did not offset the additional returns earned by calves, twinning in dairy cattle via selection or artificial induction appears not to be desirable.

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“…Confounding between sire and parity was anticipated, and it was found necessary to take into account the effect of parity on incidence of twinning. This effect is pronounced up to the third calving, but slight from this calving onwards (Auran, 1974).…”

Section: H E R I T a B I L I T Y Of Twinningmentioning

confidence: 84%

Genetic Aspects of Twinning in Dairy Cattle

Syrstad

1974

Acta Agriculturae Scandinavica

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Multiple Births in Norwegian Cattle

Cited by 7 publications

References 7 publications

Effects of Twinning on Lactation and Days Open in Holsteins

Effects of Twinning on Lactation and Days Open in Holsteins

Twinning in dairy cattle and its effect on milk yield, lactation length, dry period length and calf performance

Genetic Aspects of Twinning in Dairy Cattle

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