scholarly journals Effect of Digestible Lysine/Metabolisable Energy Ratio in F1 (Landrace x Yorkshire) Gilt Diets on Growth, Age at Puberty and Reproductive Performance in Closed Housing Condition

2021 ◽  
Vol 9 (9) ◽  
Author(s):  
Nguyen Dinh Tuong ◽  
Tran Thi Bich Ngoc ◽  
Tran Hiep ◽  
Pham Kim Dang
Keyword(s):  
Reproductive Performance ◽  
Housing Condition ◽  
Energy Ratio ◽  
Metabolisable Energy ◽  
Age At Puberty

The effect of deworming naturally infected heifers on liveweight gain, reproductive performance and fecal egg counts

1993 ◽  
Vol 73 (2) ◽  
pp. 287-293
Author(s):  
S. L. Boyles ◽  
L. J. Johnson ◽  
W. D. Slanger ◽  
B. J. Kreft ◽  
J. D. Kirsch
Keyword(s):  
Key Words ◽  
Reproductive Performance ◽  
Fecal Sample ◽  
Average Daily Gain ◽  
Treated Group ◽  
The Other ◽  
Control Group ◽  
Age At Puberty ◽  
Daily Gain

Twenty-six of 52 heifers with an average liveweight of 318 kg were dewormed by intraruminal injection of oxfendazole and placed in drylot on 31 January. The other 26 animals served as controls. All heifers were pastured starting on 14 June and the treatment heifers were dewormed in the same manner as at the start of the experiment (31 January) on 1 July and 31 July. The groups started out with similar total worm eggs per gram of fecal sample, but the dewormed heifers had fewer counts each month thereafter. The drylot average daily gain of the treated heifers was higher (P = 0.01) and less variable (P = 0.12) and by 29 May these animals were heavier by 11.7 kg (P = 0.10). The treated animals did not gain as fast on pasture (P = 0.20), but the gain continued to be less variable (P = 0.09). Age at puberty was not different. Number of open heifers in the treated group was 4 vs. 15% for the control group (P = 0.18). Deworming by intraruminal injection resulted in faster feedlot gains, more uniform gains during both drylot and pasture, reduced parasites and no abscess at injection sites. Key words: Anthelmintics, oxfendazole, cattle, heifers

Heritability estimates and effect on lifetime reproductive performance of age at puberty in sows

2018 ◽  
Vol 195 ◽  
pp. 207-215 ◽  
Author(s):  
Qingqing Li ◽  
Xiaolong Yuan ◽  
Zitao Chen ◽  
Ailing Zhang ◽  
Zhe Zhang ◽  
...  
Keyword(s):  
Reproductive Performance ◽  
Heritability Estimates ◽  
Age At Puberty

scholarly journals Reproductive Parameters of Native Sows in Selected Area of Bangladesh

2014 ◽  
Vol 12 (2) ◽  
pp. 211-215
Author(s):  
MA Motaleb ◽  
MK Chowdhury ◽  
MA Islam ◽  
JU Ahmed ◽  
MMU Bhuiyan
Keyword(s):  
Pregnancy Rate ◽  
Reproductive Performance ◽  
Cycle Length ◽  
Oestrous Cycle ◽  
Gestation Length ◽  
Reproductive Parameters ◽  
Factors Affecting ◽  
Interview Method ◽  
Pig Farms ◽  
Age At Puberty

Reproductive performance is considered as one of the important factors affecting the productivity and economy of the pig farms. The objective of the study was to determine the reproductive parameters of gilts and sows by direct interview method using a pretested questionnaire in selected area of Bangladesh. A total of 20 pig farms having 60 gilts and 27 sows were included in this investigation. The present study revealed that, in native female pigs, the age at puberty was 229.0 ± 16.7 days, the oestrous cycle length was 22.2 ± 1.2 days, the oestrous duration was 37.9 ± 14.2 hours, the gestation length was 113.5 ± 1.0 days, the interval between farrowing and onset of oestrus was 62.9 ± 11.9 days and the number of piglets born per native sow was 5.25 ± 2.3. It was also found that the first service pregnancy rate was 71.7% and the number of services required for each pregnancy was 1.3. The highest proportion of pigs was detected in oestrus by observing stand to be mounted by boars. It is concluded that reproductive parameters of native sows need to be improved for better production.DOI: http://dx.doi.org/10.3329/bjvm.v12i2.21294 Bangl. J. Vet. Med. (2014). 12 (2): 211-215  

scholarly journals Reproductive performance of rabbits on a low protein diet

1983 ◽  
Vol 17 (4) ◽  
pp. 340-345 ◽  
Author(s):  
C. E. Adams
Keyword(s):  
Pregnancy Rate ◽  
Neonatal Mortality ◽  
Reproductive Performance ◽  
Mating Behaviour ◽  
Protein Diet ◽  
Energy Ratio ◽  
Low Protein Diet ◽  
Low Protein ◽  
Protein Energy

The growth and reproductive performance of rabbits reared on diet 18 and transferred to diet R14 (low protein/energy ratio) for (a) 3-4 weeks prior to mating or (b) 4 weeks prior to mating and throughout pregnancy were examined. Observations are presented on bodyweights, size and colour of the vulva and mating behaviour, pregnancy rate, and neonatal mortality. No significant differences were noted in comparison with 'controls' receiving Diet 18.

scholarly journals Productive and reproductive performance of Saanen goat at AZZahra farm of Sandakan in Malaysia

2018 ◽  
Vol 47 (1) ◽  
pp. 1-12 ◽  
Author(s):  
MAMY Khandoker ◽  
N Afini ◽  
A Azwan
Keyword(s):  
Body Weight ◽  
Birth Weight ◽  
Litter Size ◽  
Reproductive Performance ◽  
Dairy Goat ◽  
Gestation Length ◽  
Estrus Cycle ◽  
Average Birth Weight ◽  
Saanen Goat ◽  
Age At Puberty

An experiment was conducted at AZ-Zahra Farm, Sandakan, Sabah, Malaysia to investigate the productive and reproductive performance of Saanen dairy goat. Body weight at different ages were collected once while birth weight was collected when does gave birth. On the other hand, milk production of each individual per day was received continuously for three months. The data on reproductive parameters such as length of estrus cycle, duration of estrus period, age at puberty, gestation length, age at first kidding, litter size, birth weight and kid mortality were noted. Descriptive statistics such as number, percentage, mean, standard deviation were performed. T-test was also conducted to know the statistical difference between the groups. Result demonstrated that body weight increases significantly (p<0.01) with the advancement of the age. The highest daily milk yield was found in 2-3 years of age. Dam with multiple kids produced more milk than dam with single kid. Estrus cycle of Saanen goats was found 21 days, the average estrus period duration was 2.75 days, age at puberty was 8.33 months, first kidding age was 14.2 months and gestation period was 150 days on an average. With the increase of the age of dam litter size increased. Meanwhile average birth weight increased as age of dam increased from 2.85 kg in 1 year to 3.26 kg in 3 years. Male kids born heavier than females (3.23±0.62 vs. 2.75±0.58 kg) and single kids were heavier than twin kids (3.07±0.66 kgvs2.70±0.28 kg). Low mortality rate of kids was recorded in this study (6.4%). It can be concluded that the overall productive and reproductive performances of Saanen goat at AZ-Zahra farm were within the acceptable level and the variation recorded in different parameters is very much usual. Bang. J. Anim. Sci. 2018. 47 (1): 1-12

Lifetime productivity in gilts previously selected for decreased age at puberty

1995 ◽  
Vol 61 (1) ◽  
pp. 115-121 ◽  
Author(s):  
R. B. Holder ◽  
W. R. Lamberson ◽  
R. O. Bates ◽  
T. J. Safranski
Keyword(s):  
Weight Loss ◽  
Birth Weight ◽  
Food Consumption ◽  
Litter Size ◽  
Reproductive Performance ◽  
Gene Pool ◽  
Ovulation Rate ◽  
Age At Puberty ◽  
Line P ◽  
Pool Population

AbstractA study was conducted to evaluate the effect of decreasing age of puberty on lifetime productivity in sows. Two lines of gilts from the Nebraska Gene Pool population were used in this study: a line that had been selected for decreased age at puberty (AP) and a line in which selection had been random (RS). The study was conducted in two parts. In part one, 75 gilts were mated at second oestrus and the productivity measured over five parities. A second experiment utilizing 68 gilts was conducted to provide further data for comparing litter size at parity 1, and also to compare ovulation rates in the two lines at second oestrus. Results showed that litter size was similar in both lines across parities. After five parities the percentage of sows farrowing relative to parity 1 was 58-8% for the AP line but only 39·4% for the RS line (P = 0·17). Litter birth weight, litter size and weight at 21 days, number weaned, and lactation food consumption were similar for both lines. Lactation weight loss was not significantly different between the two lines (60·9 (s.e. 5·9) v. 527 (s.e. 5·0) kg, for RS and AP gilts, respectively) but was consistent with the slightly longer weaning to remating intervals in the RS line (7·8 (s.e. 0·7) v. 6·6 (s.e. 0·7) days, P = 0·22). Ovulation rate at second oestrus did not differ between the two lines (14·1 (s.e. 0·9) v. 14·3 (s.e. 0·5), for RS and AP gilts, respectively). The regression of mean accumulative productivity on time was in favour of the AP line (P = 0·05). These results suggest that reproductive performance is not impaired in gilts which have been selected to reach puberty at earlier ages, and productivity at a specific age may be enhanced.

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.

Genetic correlations of young bull reproductive traits and heifer puberty traits with female reproductive performance in two tropical beef genotypes in northern Australia

2014 ◽  
Vol 54 (1) ◽  
pp. 74 ◽  
Author(s):  
D. J. Johnston ◽  
N. J. Corbet ◽  
S. A. Barwick ◽  
M. L. Wolcott ◽  
R. G. Holroyd
Keyword(s):  
Reproductive Performance ◽  
Semen Quality ◽  
Genetic Correlations ◽  
Reproductive Traits ◽  
Northern Australia ◽  
Female Reproduction ◽  
Young Bull ◽  
Scrotal Circumference ◽  
Reproduction Traits ◽  
Age At Puberty

Genetic correlations of young bull and heifer puberty traits with measures of early and lifetime female reproductive performance were estimated in two tropical beef cattle genotypes. Heifer age at puberty was highly (rg = –0.71 ± 0.11) and moderately (rg = –0.40 ± 0.20) genetically correlated with pregnancy rate at first annual mating (mating 1) and lifetime annual calving rate, respectively in Brahman (BRAH). In Tropical Composite (TCOMP), heifer age at puberty was highly correlated with reproductive outcomes from the first re-breed (mating 2), mainly due to its association with lactation anoestrous interval (rg = 0.72 ± 0.17). Scrotal circumference were correlated with heifer age at puberty (rg = –0.41 ± 0.11 at 12 months in BRAH; –0.30 ± 0.13 at 6 months in TCOMP) but correlations were lower with later female reproduction traits. Bull insulin-like growth factor-I was correlated with heifer age at puberty (rg = –0.56 ± 0.11 in BRAH; –0.43 ± 0.11 in TCOMP) and blood luteinising hormone concentration was moderately correlated with lactation anoestrous interval (rg = 0.59 ± 0.23) in TCOMP. Semen quality traits, including mass activity, motility and percent normal sperm were genetically correlated with lactation anoestrus and female lifetime female reproductive traits in both genotypes, but the magnitudes of the relationships differed with bull age at measurement. Preputial eversion and sheath scores were genetically associated with lifetime calving and weaning rates in both genotypes. Several of the early-in-life male and female measures examined were moderately to highly genetically correlated with early and lifetime female reproduction traits and may be useful as indirect selection criteria for improving female reproduction in tropical breeds in northern Australia.

scholarly journals Willow browse blocks for drought protection and for sustainable management of internal parasites

2006 ◽  
pp. 101-107 ◽  
Author(s):  
T.N. Barry ◽  
E.L. Mcwilliam ◽  
D.W. Pitta ◽  
C.M.Diaz Lira ◽  
P.D. Kemp ◽  
...  
Keyword(s):  
Reproductive Performance ◽  
Indirect Effects ◽  
Sustainable Management ◽  
Grazing Management ◽  
First Year ◽  
Direct And Indirect Effects ◽  
Internal Parasite ◽  
Internal Parasites ◽  
Metabolisable Energy

Browse blocks were developed on wet rush-infested areas of Riverside Farm, near Masterton, by planting 6,000 willow stakes/ha over the winter periods of 2000, 2001 and 2002. This was followed by light grazing in the first year after planting and then more intensive grazing in later years. After 18 months the areas dried out, due to evapotranspiration from the trees, and a herbage sward developed from volunteer species. The quality of the herbage progressively improved over a 4 year period and the browse blocks now support year-round grazing by sheep. In Experiment 1, ewes that grazed willow browse blocks for 86 days in 2004 (including mating) had higher reproductive performance than ewes that were mated on short, drought affected pasture. However, reproductive performance was lower than that from ewes mated on a sole diet of long herbage similar to that growing in the browse blocks. It was calculated that 15 and 65% of the metabolisable energy and condensed tannins consumed by ewes grazing browse blocks was provided by willow trees. In Experiment 2, undrenched lambs grazing either control pasture or browse blocks for 98 days in 2005 had lower liveweight and carcass gains than lambs regularly drenched with anthelmintic. Lambs grazing browse blocks consistently had lower dag scores and undrenched lambs grazing on browse blocks had reduced worm burdens of some economically important internal parasites compared with undrenched lambs grazing pasture. It was concluded that the benefits of browse blocks could be due to both direct and indirect effects and that any benefits in internal parasite management may be accompanied by reduced rates of carcass growth. Guidelines are presented for the grazing management of willow browse blocks over a complete 12 month period. Keywords: willow (Salix), fodder tree, drought, internal parasites.

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