Effect of Physical Feed Restriction During Rearing on Large White Turkey Breeder Hens: 2. Reproductive Performance

The effects of ad libitum versus restricted feeding during the period from 22 to 62 wk of age were examined in 60 individually-housed Indian River broiler breeder hens. Body weight of 30 ad-libitum-fed hens was approximately 700 g heavier than that of 30 restricted hens throughout most of the laying period. Mean egg output was lower in ad-libitum-fed hens (136.2 eggs) compared to restricted hens (176.6 eggs). A similar number of laying sequences (defined as consecutive days of laying) were observed in both groups of hens; however, the mean length of the prime sequence was 24.4 d for the restricted hens compared to 14.9 d for the ad-libitum-fed hens. Ad-libitum-fed hens had a higher incidence of intersequence pauses of greater than 11 d duration compared to restricted hens. Feed restriction did not improve fertility, embryo viability, or embryo production of eggs incubated for a period of 7 d. At 62 wk of age the carcasses of the restricted-fed hens contained on average 901 g of fat while the carcasses of the ad-libitum-fed hens contained 1270 g of fat. Ad libitum feeding reduced reproductive performance by reducing the length of the prime sequence and by increasing the number of long intersequence pauses. Key words: Broiler breeder hens, full-feeding, feed restriction, obesity, reproductive performance

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Effect of Physical Feed Restriction During Rearing on Large White Turkey Breeder Hens: 1. Growth Performance

Poultry Science ◽

10.1093/ps/81.1.9 ◽

2002 ◽

Vol 81 (1) ◽

pp. 9-15 ◽

Cited By ~ 5

Author(s):

A.N. Crouch ◽

J.L. Grimes ◽

V.L. Christensen ◽

K.K. Krueger

Keyword(s):

Growth Performance ◽

Feed Restriction ◽

Large White ◽

Breeder Hens

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The Effect of Different Feed Restriction Programs and Dietary L-Carnitine Supplementation on Reproductive Performance, Efficiency, Frame Size and Uniformity in Broiler Breeder Hens

International Journal of Poultry Science ◽

10.3923/ijps.2009.409.425 ◽

2009 ◽

Vol 8 (5) ◽

pp. 409-425 ◽

Cited By ~ 6

Author(s):

M. de Beer ◽

C.N. Coon

Keyword(s):

Reproductive Performance ◽

Feed Restriction ◽

Carnitine Supplementation ◽

Frame Size ◽

Broiler Breeder ◽

Breeder Hens ◽

Broiler Breeder Hens

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The Effect of Different Feed Restriction Programs on Reproductive Performance, Efficiency, Frame Size, and Uniformity in Broiler Breeder Hens

Poultry Science ◽

10.1093/ps/86.9.1927 ◽

2007 ◽

Vol 86 (9) ◽

pp. 1927-1939 ◽

Cited By ~ 32

Author(s):

M. de Beer ◽

C.N. Coon

Keyword(s):

Reproductive Performance ◽

Feed Restriction ◽

Frame Size ◽

Broiler Breeder ◽

Breeder Hens ◽

Broiler Breeder Hens

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The Effect of Feed Restriction Programs and Growth Curves on Reproductive Performance, in vitro Lipogenesis and Heterophil to Lymphocyte Ratios in Broiler Breeder Hens

International Journal of Poultry Science ◽

10.3923/ijps.2009.373.388 ◽

2009 ◽

Vol 8 (4) ◽

pp. 373-388 ◽

Cited By ~ 5

Author(s):

M. de Beer ◽

C.N. Coon

Keyword(s):

Reproductive Performance ◽

Growth Curves ◽

Feed Restriction ◽

Broiler Breeder ◽

Breeder Hens ◽

Broiler Breeder Hens

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129 Genomic Relationship Between PRRSV Wild-type Infection and PRRSV Vaccination for Antibody Response and Reproductive Performance

Journal of Animal Science ◽

10.1093/jas/skab054.032 ◽

2021 ◽

Vol 99 (Supplement_1) ◽

pp. 18-18

Author(s):

Leticia P Sanglard ◽

Felipe Hickmann ◽

Yijian Huang ◽

Kent A Gray ◽

Daniel Linhares ◽

...

Keyword(s):

Antibody Response ◽

Reproductive Performance ◽

Genetic Correlations ◽

Clinical Signs ◽

Respiratory Syndrome Virus ◽

Wild Type ◽

Large White ◽

Selection For ◽

Indicator Trait ◽

Type Infection

Abstract Immunoglobulin G antibody response, measured as sample-to-positive (S/P) ratio, to Porcine Reproductive and Respiratory Syndrome virus (PRRSV) has been proposed as an indicator trait for improved reproductive performance in PRRSV-infected purebred sows and PRRSV-vaccinated crossbred gilts. In this study, we investigated the genetic correlations (rg) of S/P ratio following a PRRSV outbreak and PRRSV-vaccination with performance in non-exposed and PRRSV-exposed sows. PRRSV outbreak phase was defined based on previously described methodologies after the detection of typical clinical signs of PRRSV infection. 541 Landrace sows had S/P ratio measured at ~54 days after the beginning of the PRRSV outbreak (S/Poutbreak), and 906 Landrace x Large White naïve F1 gilts had S/P ratio measured at ~50 days after vaccination with a commercial modified live PRRSV vaccine (S/PVx). 711 and 428 Landrace sows had reproductive performance recorded before and during the PRRSV outbreak, respectively. 811 vaccinated F1 animals had farrowing performance for up to 3 parities. All animals were genotyped for ~28K SNPs. The estimate of rg of S/Poutbreakwith S/PVx was high (rg±SE = 0.72±0.18). Estimates of rg of S/Poutbreak with reproductive performance in F1 sows were low to moderate, ranging from 0.05±0.23 (number stillborn) to 0.30±0.20 (total number born). Estimates of rg of S/PVxwith reproductive performance in non-infected purebred sows were moderate and favorable with number born alive (0.50±0.23), but low (0 to -0.11±0.23) with litter mortality traits. Estimates of rg of S/PVx were moderate and negative (-0.47±0.18) with the number of mummies in PRRSV-infected purebred sows and low with other traits (-0.29±0.18 for total number born to 0.05±0.18 for number stillborn). These results indicate that selection for antibody response following a PRRSV outbreak collected in purebred sows and to PRRSV vaccination collected in commercial crossbred gilts may increase litter size of non-infected and PRRSV-exposed purebred and commercial crossbred sows.

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The effect on the reproductive performance of sows of dietary protein concentration and pattern of feeding in pregnancy

The Journal of Agricultural Science ◽

10.1017/s0021859600014520 ◽

1969 ◽

Vol 73 (2) ◽

pp. 301-309 ◽

Cited By ~ 8

Author(s):

I. H. Pike ◽

T. G. Boaz

Keyword(s):

Reproductive Performance ◽

Crude Protein ◽

Protein Concentration ◽

Fish Meal ◽

Live Weight ◽

Lactation Performance ◽

Large White ◽

Low Protein ◽

Lower Capacity ◽

In Pregnancy

SUMMARYIn a factorial experiment the effect of two protein intakes and three patterns of feeding in the second pregnancy of 48 Large White x Wessex Saddleback sows was examined. The high protein (HP) diet (19·5% crude protein) contained 15% white fish meal. The low protein (LP) diet (10·5% crude protein) contained cereal protein only. Nutrient components of the diets differed in protein only. The pattern treatments involved allowances of 1·8 kg (L), 2·7 kg (C) and 3·6 kg (H) per day, the three pregnancy patterns being HL, C and LH with the changeovers made from the 49th to the 63rd day post coitum (p.c). Sows on the three pattern treatments received the same total amount of feed from 0–112 days p.c. and were treated alike at farrowing and during lactation.Fertility and parturition results were similar for all treatments, but the number of piglets alive after birth (when weighed) was least for LP sows on the HL pattern. At 3 weeks of age the size and weight of litters on HP sows were significantly greater than those on LP sows (P < 0·05 and < 0·001 respectively). More piglets were weaned by HP sows than LP sows (P < 0·05). HP sows gained more weight in pregnancy (P < 0·001) which was slightly longer, and lost more weight in lactation (P < 0·05) than LP sows.The HL pattern of feeding was associated with smaller live weight gains in pregnancy than the LH pattern (P < 0·001) and the total birth weight of HL litters was lighter than LH (P < 0·05), mean piglet weights being similar. Lactation performance was unaffected by pattern treatment.The main conclusion is that a low intake, particularly during the latter half of pregnancy, of protein which is of vegetable origin, is associated with decreased viability of the piglets at birth and in early suckling life, and with lower capacity of the sows for milk production.

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