Some Effects of Obesity in Beef Females1

Arnett, D. W.; Holland, G. L.; Totusek, Robert

doi:10.2527/jas1971.3351129x

Cited by 45 publications

(9 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this study, most of the correlations between embryo production and subcutaneous fat deposition were low, indicating random sources of variation, but animals with more back fat tended to produce fewer transferable embryos. This finding ties in with the reports that 15 experimental obese cows with an average fat thickness of 3-4 cm at the back required more services per conception than cows with an average backfat thickness of 1-73 cm (Arnett, Holland and Totusek, 1971), and that 10% lower conception rates at first service were obtained in obese heifers following spontaneous ovulation (Wiltbank, Bond, Warnick, Davis, Cook, Reynolds and Hazen, 1965). The extreme fat accumulation observed in a few animals suggested that accumulation in the regions of the ovarian bursae and oviducts can interfere with or prevent normal ovum transport into or through the oviducts, but that fat accumulation per se does not interfere with the superovulatory response, which was on a par with that of thinner animals.…”

supporting

confidence: 85%

A note on fertilization and embryo production in superovulated cattle with various levels of subcutaneous fat tissue

Bielański

Yadav

1990

Anim. Sci.

View full text Add to dashboard Cite

One hundred and five Holstein cattle, with a mean body weight of 668 kg, were superovulated using a total dose of 18 mg FSH. Five animals did not have corpora lutea (CL). No ova or embryos were recovered from 12 of the 100 animals which had CL. A total of 810 ova/embryos were collected from the remaining 88 animals and 432 of these were of transferable quality. The mean (range) measurements for subcutaneous fat deposition in samples taken at slaughter from the back, rump and ventral abdominal wall were 14 mm (3 to 34), 7 mm (0·7 to 33) and 7 mm (0·8 to 32), respectively. The number of transferable embryos and fertilized ova decreased as fat levels increased, but the differences between the groups were not significant (P > 0·05). There was a positive relationship between the number of CL and (a) the number of fertilized ova, and (b) the number of transferable embryos (r = 0·53, P < 0·001 and r = 0·48, P < 0·001). The correlation between the number of fertilized embryos and the number of transferable embryos was r = 0·91, P < 0·001.

show abstract

supporting

confidence: 85%

A note on fertilization and embryo production in superovulated cattle with various levels of subcutaneous fat tissue

Bielański

Yadav

1990

Anim. Sci.

View full text Add to dashboard Cite

show abstract

“…Heifers were slaughtered and those on increased intake had a greater udder weight and a larger proportion ofthat weight was fat. Arnett et al (1971) studied sets of twin heifers developed at a rate of 0.34 kg/d or at a rate designed to induce a high degree of body fatness. The overdeveloped twins were 30% heavier than more appropriately developed twins at first mating and maintained this difference through their third calving season.…”

Section: Excess Nutrientsmentioning

confidence: 99%

PHYSIOLOGY AND ENDOCRINOLOGY SYMPOSIUM: Nutritional aspects of developing replacement heifers 1

Funston¹,

Martin²,

Larson³

et al. 2012

Journal of Animal Science

View full text Add to dashboard Cite

Studies in numerous species provide evidence that diet during development can mediate physiological changes necessary for puberty. In cattle, several studies have reported inverse correlations between postweaning growth rate and age at puberty and heifer pregnancy rates. Thus, postweaning growth rate was determined to be an important factor affecting age of puberty, which in turn influences pregnancy rates. This and other research conducted during the late 1960s through the early 1980s indicated puberty occurs at a genetically predetermined size, and only when heifers reach their target BW can increased pregnancy rates be obtained. Guidelines were established indicating replacement heifers should achieve 60 to 65% of their expected mature BW by breeding. Traditional approaches for postweaning development of replacement heifers used during the last several decades have primarily focused on feeding heifers to achieve or exceed an appropriate target BW and thereby maximize heifer pregnancy rates. Intensive heifer development systems may maximize pregnancy rates, but not necessarily optimize profit or sustainability. Since inception of target BW guidelines, subsequent research demonstrated that the growth pattern heifers experience before achieving a critical target BW could be varied. Altering rate and timing of BW gain can result in compensatory growth periods, providing an opportunity to decrease feed costs. Recent research has demonstrated that feeding replacement heifers to traditional target BW increased development costs without improving reproduction or subsequent calf production relative to development systems in which heifers were developed to lighter target BW ranging from 50 to 57% of mature BW.

show abstract

“…It is possible that the cows fed CON became over conditioned and this negatively impacted milk production and therefore calf weaning weight. This is supported by Arnett et al (1971) in an investigation into the effects of obesity in beef females. Normal body conditioned cows produced significantly more milk over three lactations than obese beef cows and, in addition, calves of the normal conditioned cows tended to gain weight more rapidly and be heavier at weaning than calves who nursed from obese cows.…”

Section: Calf Performancementioning

confidence: 69%

Effect of crop residues in haylage-based rations on the performance of pregnant beef cows

Wood¹,

Kelly²,

Miller³

et al. 2010

Can. J. Anim. Sci.

View full text Add to dashboard Cite

. 2010. Effect of crop residues in haylage-based rations on the performance of pregnant beef cows. Can. J. Anim. Sci. 90: 69Á76. Seventy-one individually fed multiparous, pregnant crossbred beef cows [body weight (BW)9SD; 730977.9 kg] were used to examine the effects of including crop residues in alfalfa/grass haylage-based rations on BW gain, fat deposition/loss and plasma metabolites. The haylage control ration (CON; n 023) was modified to include either 40% (dry matter basis) wheat straw (WS; n 024) or 40% corn stalklage (CS; n 024). Cows were blocked by calving date and randomly assigned to each treatment and fed for 82 d leading up to the earliest calving date. On days 1, 40, and 82, cows were weighed, ultrasounded to measure subcutaneous backfat (BF) over the ribs, body condition scored (BCS) and plasma was collected. Calves from cows fed WS had greater (P00.02) weaning weights than cows fed CS, but did not differ (P00.23) from CON. CS cows had the lowest ADG (PB0.03), lost the most body condition (PB0.04), and had the lowest dry matter intake (P50.001). These data indicate that diets containing crop residues can be used to dilute high-quality haylage rations for wintering beef cows; however, diets containing 40% corn stalklage used in this experiment may not be advisable, since cows lost BW and fat, and their calves had the poorest calf performance up to weaning.Key words: Beef cattle, wheat straw, winter feeding, corn stalklage, crop residues Wood, K. M., Kelly, M. J., Miller, S. P., Mandell, I. B. et Swanson, K. C. 2010. Incidence des de´chets de culture dans les rations de mi-fane´sur la performance des vaches de boucherie gravides. Can. J. Anim. Sci. 90: 69Á76. Soixante et onze vaches de boucherie hybrides, multipares et gravides (poids corporel 9 É .-T.; 730 9 77,9 kg), nourries individuellement, ont servi a`pre´ciser les conse´quences des re´sidus agricoles pre´sents dans les rations de mi-fane´de luzerne et de gramine´es sur le gain de poids, le rapport entre le de´poˆt et la perte de matie`re grasse, et les me´tabolites du sang. Les auteurs ont modifie´la ration te´moin de mi-fane´(CON; n 0 23) afin qu'elle inclue 40 % (d'apre`s la quantite´de matie`re se`che) de paille de ble´(WS; n 0 24) ou 40 % d'ensilage de tiges de maı¨s (CS; n 0 24). Les vaches ont e´te´re´parties selon la date de veˆlage, puis affecte´es au hasard a`un traitement avant de recevoir la ration pendant 82 jours jusqu'a`la premie`re date de veˆlage. Les animaux ont e´teṕ ese´s le 1 er , le 40 e et le 82 e jour. On a aussi mesure´le gras dorsal sous-cutane´aux ultrasons a`hauteur des coˆtes, e´tabli la note d'e´tat corporel et pre´leve´du sang. Les veaux des vaches nourries avec du WS e´taient plus lourds (P 0 0,02) au sevrage que ceux des vaches recevant du CS, mais ils avaient le meˆme poids (P 0 0,23) que les veaux du groupe CON. Les vaches du groupe CS ont enregistre´le gain de poids quotidien le plus faible (P B 0,03), ont vu leur e´tat corporel se de´grader le plus (P B 0,04), et ont inge´re´le moins de matie`re se`che (P50...

show abstract

Some Effects of Obesity in Beef Females1

Cited by 45 publications

References 7 publications

A note on fertilization and embryo production in superovulated cattle with various levels of subcutaneous fat tissue

A note on fertilization and embryo production in superovulated cattle with various levels of subcutaneous fat tissue

PHYSIOLOGY AND ENDOCRINOLOGY SYMPOSIUM: Nutritional aspects of developing replacement heifers 1

Effect of crop residues in haylage-based rations on the performance of pregnant beef cows

Contact Info

Product

Resources

About