AGEWEAN – The effect of weaning age on sow performance over four parities

2007 ◽  
Vol 2007 ◽  
pp. 85-85 ◽  
Author(s):  
H.L. Edge ◽  
K. Breuer ◽  
K. Hillman ◽  
C.A. Morgan ◽  
A. Stewart ◽  
...  
Keyword(s):  
Growth Rate ◽  
Reproductive Performance ◽  
Feed Intake ◽  
Older Age ◽  
Growth Promoter ◽  
Negative Effect ◽  
Weaning Age ◽  
Weaning Pigs ◽  
Piglet Growth

Weaning pigs from the sow at an older age, when their digestive systems are more mature, has been suggested as an approach to reduce the potentially negative effect of the in-feed antibiotic growth promoter (AGP) ban on the national pig herd. Whilst this approach has been shown to improve feed intake and piglet growth rate during the early postweaning period (Edge et al. 2006) it is also important to consider how changes in weaning age may influence sow productivity and longevity in the herd. The AGEWEAN programme of research followed 570 gilts whose piglets were weaned at either 4, 6 or 8 weeks of age through four successive parities; reproductive performance, litter data and the timing and reasons for any sow being culled from the herd were recorded.

Effects of lasalocid and protein levels on feed intake and growth rate of Awassi lambs

1997 ◽  
Vol 1997 ◽  
pp. 187-187
Author(s):  
M. M. Muwalla ◽  
M. Y. Harb ◽  
T. F. Crosby
Keyword(s):  
Growth Rate ◽  
Feed Intake ◽  
Feed Efficiency ◽  
Published Data ◽  
Growth Promoter ◽  
Feed Conversion ◽  
Protein Levels ◽  
Feedlot Lambs ◽  
Lamb Growth ◽  
Awassi Lambs

Lasalocid is a polyether antibiotic derived from the fermentation of streptomyces lasaliensis used as a coccidiostat in sheep. There are varying literature reports on lamb growth rate and feed intake when lasalocid is included in the diet of feedlot lambs. While some reports have shown that lasalocid enhances feed efficiency in ruminants by decreasing feed intake and either maintaining or improving rate of gain others indicate that lasalocid did not have any effect on lamb growth rates or feed efficiency (Stobart et al., 1987). Also, when lasalocid was fed to Chios lambs, growth rate was increased but there was no improvement in feed conversion efficiency (Hadjipanayiotou et al., 1988). There are no published data in the literature relating to the use of lasalocid as a growth promoter in the Awassi breed of sheep fed complete diets and the purpose of this study was to investigate the effect of lasalocid with two levels of protein on the growth rate and feed efficiency of weaned male and female Awassi lambs.

The effect of form and placement of feed for newly weaned piglets on growth performance for three weeks postweaning

2002 ◽  
Vol 2002 ◽  
pp. 78-78
Author(s):  
B. P. Corrigan ◽  
M. Ellis ◽  
B. F. Wolter ◽  
J. M. DeDecker ◽  
S. E. Curtis
Keyword(s):  
Growth Rate ◽  
Nutritional Status ◽  
Growth Performance ◽  
Feed Intake ◽  
Management Strategies ◽  
Weaned Piglets ◽  
Feeding Management ◽  
Piglet Growth ◽  
Dry Diet ◽  
Weaning Piglets

At weaning, piglets must adapt to considerable changes in their environmental, immunological, and nutritional status. This period of adaptation is accompanied by a reduction in piglet growth rate that has been associated with the shift from sow’s milk to a solid dry diet. Consequently, feeding management strategies that result in increased feed intake may increase piglet growth rate postweaning. This study evaluated the effects of providing feed as a gruel and feeding on floor mats on piglet performance for three weeks after weaning

EFFECTS OF DIETARY VITAMIN A ON GROWTH AND REPRODUCTION IN RABBITS

1972 ◽  
Vol 52 (1) ◽  
pp. 125-136 ◽  
Author(s):  
A. S. PAYNE ◽  
E. DONEFER ◽  
R. D. BAKER
Keyword(s):  
Growth Rate ◽  
Vitamin A ◽  
Reproductive Performance ◽  
Feed Intake ◽  
Reproductive Function ◽  
Dietary Vitamin ◽  
Feeding Period ◽  
Slight Excess ◽  
Ocular Lesions ◽  
Growth And Reproduction

Twenty-four, 4-week-old rabbits were fed diets to provide 0, 3, 6, and 12 μg vitamin A per kg bodyweight per day. After 17 weeks, rabbits on the 0 level exhibited significantly lower feed intake and growth rate and all six animals died before the completion of the 24-week feeding period. The six rabbits on the 3-μg level developed ocular lesions and five died before the completion of the trial. Avitaminosis A was less prevalent on the higher levels with no deaths on the 12-μg diet. Reproductive performance of a surviving male continued on the 3-μg level was characterized by absence of spermatogenesis. Mature males placed on the same ration did not exhibit decreased reproductive function. Reproductive performance of surviving females was directly related to vitamin A level. Offspring from females on the 3-, 6-, and 12-μig levels all exhibited avitaminosis A with per cent surviving 14 days at 0, 15, and 59, respectively. Minimal daily vitamin A requirement for young growing rabbits and breeding males would appear to be approximately 8 μg/Wkg whereas a vitamin A intake in slight excess of 14 μg/Wkg was inadequate for optimum reproductive performance in female rabbits.

The effect on litter performance at birth of feeding gilts fermented liquid feed (FLF), non-fermented liquid feed (NFLF) or dry feed (DF) for 14 days pre-farrowing

2003 ◽  
Vol 2003 ◽  
pp. 68-68 ◽  
Author(s):  
C.A. Tsourgiannis ◽  
V. Demečková ◽  
J. Eddison ◽  
P.H. Brooks
Keyword(s):  
Growth Rate ◽  
Birth Weight ◽  
Reproductive Cycle ◽  
Reproductive Performance ◽  
Feed Intake ◽  
Foetal Growth ◽  
Liquid Feed ◽  
Reproductive Life

Feeding and management during gestation focuses on preparing the sow for parturition and lactation. Despite improvements in husbandry in recent years, mortality remains around 10% and may be increasing (Herpin et al., (1993). Cole, (1990) found that foetal growth rate in the last trimester of pregnancy increases dramatically compared with early and mid-gestation and Cromwell et al., (1989) reported that a 75% increase in feed intake during the last 23 days of gestation increased reproductive performance and also increased birth weight of piglets (1.48 vs. 1.44, P < 0.003). Results from previous studies have also shown that an increase in feed intake from 2.3 kg to 3.9 kg per day can reduce sow backfat loss during the reproductive cycle and increases reproductive life (Miller et al., 2000). The study reported here investigated the influence of three different diet forms fed to gestating gilts for 14 days pre-farrowing, on litter characteristics at birth.

Restricted feed intake in lactating primiparous sows. I. Effects on sow metabolic state and subsequent reproductive performance

2011 ◽  
Vol 23 (7) ◽  
pp. 889 ◽  
Author(s):  
J. L. Patterson ◽  
M. N. Smit ◽  
S. Novak ◽  
A. P. Wellen ◽  
G. R. Foxcroft
Keyword(s):  
Growth Rate ◽  
Reproductive Performance ◽  
Feed Intake ◽  
Feed Restriction ◽  
Negative Effects ◽  
Metabolic State ◽  
Body Tissues ◽  
Metabolisable Energy ◽  
Restricted Feed Intake ◽  
Intake Control

The effects of feed restriction (60% of anticipated feed intake; Restrict; n = 60) during the last week of a 21-day lactation in primiparous sows compared with feeding at 90% of anticipated feed intake (Control; n = 60) on sow metabolic state, litter growth and sow reproductive performance after weaning were compared. Metabolisable energy (ME) derived from feed was lower, ME derived from body tissues was higher and litter growth rate was reduced (all P < 0.05) in Restrict sows during the last week of lactation. Treatment did not affect weaning-to-oestrus interval, pregnancy rate, ovulation rate, embryonic survival or the number of live embryos (P > 0.05) at Day 30 of gestation: However, embryo weight was greater (P < 0.05) in Control than in Restrict sows (1.55 ± 0.04 vs 1.44 ± 0.04 g, respectively). These data suggest the biology of the commercial sow has changed and reproductive performance of contemporary primiparous sows is increasingly resistant to the negative effects of lactational catabolism. Overall, catabolism negatively affected litter weaning weight and embryonic development of the next litter, but the extent to which individual sows used tissue mobilisation to support these litter outcomes was highly variable.

scholarly journals Assessment of the Growth and Reproductive Performance of Cloned Pietrain Boars

Animals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 2053
Author(s):  
Junsong Shi ◽  
Baohua Tan ◽  
Lvhua Luo ◽  
Zicong Li ◽  
Linjun Hong ◽  
...  
Keyword(s):  
Growth Rate ◽  
Body Size ◽  
Growth Performance ◽  
Reproductive Performance ◽  
Semen Quality ◽  
Small Body ◽  
Economic Benefits ◽  
Large Animal ◽  
Significant Difference ◽  
F1 Progeny

How to maximize the use of the genetic merits of the high-ranking boars (also called superior ones) is a considerable question in the pig breeding industry, considering the money and time spent on selection. Somatic cell nuclear transfer (SCNT) is one of the potential ways to answer the question, which can be applied to produce clones with genetic resources of superior boar for the production of commercial pigs. For practical application, it is essential to investigate whether the clones and their progeny keep behaving better than the “normal boars”, considering that in vitro culture and transfer manipulation would cause a series of harmful effects to the development of clones. In this study, 59,061 cloned embryos were transferred into 250 recipient sows to produce the clones of superior Pietrain boars. The growth performance of 12 clones and 36 non-clones and the semen quality of 19 clones and 28 non-clones were compared. The reproductive performance of 21 clones and 25 non-clones were also tested. Furthermore, we made a comparison in the growth performance between 466 progeny of the clones and 822 progeny of the non-clones. Our results showed that no significant difference in semen quality and reproductive performance was observed between the clones and the non-clones, although the clones grew slower and exhibited smaller body size than the non-clones. The F1 progeny of the clones showed a greater growth rate than the non-clones. Our results demonstrated through the large animal population showed that SCNT manipulation resulted in a low growth rate and small body size, but the clones could normally produce F1 progeny with excellent growth traits to bring more economic benefits. Therefore, SCNT could be effective in enlarging the merit genetics of the superior boars and increasing the economic benefits in pig reproduction and breeding.

Relationship between the gas production profiles of mixtures of hay and maize and the patterns of rumen fermentation observed in sheep fed those mixtures

1998 ◽  
Vol 1998 ◽  
pp. 63-63
Author(s):  
C. Rymer ◽  
D.I. Givens
Keyword(s):  
Growth Rate ◽  
Feed Intake ◽  
Rumen Fermentation ◽  
Gas Production ◽  
Post Feeding ◽  
Molar Proportion ◽  
Rumen Ph ◽  
The Mean

The gas production (GP) technique has been developed to assess dynamics of ruminant digestion. Relationships have been observed between a feed's GP profile and in vivo parameters such as digestibility (Khazaal et al., 1993), feed intake and growth rate (Blümmel and Ørskov, 1993), and in situ degradability (Sileshi et al., 1997). However, there are few studies which relate GP data to the in vivo pattern of rumen fermentation (in terms of the rate of pH decline 2 h post-feeding and the mean rumen pH, concentration of total VFA and molar proportion of individual VFA). The object of this experiment was to determine whether such a relationship existed between a feed's GP profile and the pattern of rumen fermentation observed in animals fed that feed.

Sign in / Sign up

Export Citation Format

Share Document