Relationships among Weight Gains, Age at Puberty and Reproductive Performance in Heifers

1971 ◽  
Vol 32 (1) ◽  
pp. 127-131 ◽  
Author(s):  
R. E. Short ◽  
R. A. Bellows
Keyword(s):  
Reproductive Performance ◽  
Weight Gains ◽  
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

Comparison of grazing oats and pasture for sheep production

1974 ◽  
Vol 14 (68) ◽  
pp. 322 ◽  
Author(s):  
PR Dann ◽  
A Axelsen ◽  
PM Bremner
Keyword(s):  
Reproductive Performance ◽  
Subterranean Clover ◽  
Annual Grass ◽  
Wool Production ◽  
Weight Gains ◽  
Sheep Production

In 1970 and 1971, the performance of ewes grazing oats at various stocking intensities during the final stages of pregnancy was compared with that of ewes, at stocking intensities considered optimal, on subterranean clover-annual grass pasture. Grazing oats produced no more winter feed than pasture in 1970, though quality of the oat herbage was better. In 1971, oats produced more, and better quality, herbage than pasture. Much greater ewe weight gains per head and per hectare were obtained on oats than on pasture in both years. In 1971, for example, ewes rotationally grazed on oats at 37 ha-1 gained 8 times more per head, and 23 times more per hectare, than ewes at 12 ha-1 on pasture. However, gains in reproductive performance and wool production were small or negligible.

A note on the effect of white-flowered peas on sow reproductive performance

1993 ◽  
Vol 56 (1) ◽  
pp. 155-158
Author(s):  
R. B. Ogle ◽  
K. Annér
Keyword(s):  
Litter Size ◽  
Reproductive Performance ◽  
Live Weight ◽  
Soya Bean ◽  
Weight Gains ◽  
Bean Meal ◽  
Piglet Mortality ◽  
Natal Mortality ◽  
Soya Bean Meal ◽  
Size At Birth

The effect on sow reproductive performance of including 100 g white-flowered peas (Pisum sativum hortense, cv. Vreta and Lotta) per kg, replacing barley, wheat and soya-bean meal in gestation and lactation diets, was studied over four parities using 24 pairs of crossbred littermate sows. Net sow weight gains and changes in backfat thickness over the complete reproductive cycle were similar for both treatments. Piglet live-weight gains and mean litter size at birth were not influenced by treatment, although litter size at weaning was 0·5 pigs higher (P > 0·05) for the control sows, due to higher post-natal mortality rate in the litters from the sows given the pea diets. It can be concluded that inclusion of white-flowered peas at a rate of 100 g/kg had no adverse effect on reproductive performance, with the exception of slightly higher post-natal piglet mortality.

CHOLINE SUPPLEMENTATION OF BARLEY-WHEAT-SOYA DIETS AND THE REPRODUCTIVE PERFORMANCE OF SWINE

1981 ◽  
Vol 61 (3) ◽  
pp. 803-808
Author(s):  
R. R. GRANDHI ◽  
J. H. STRAIN
Keyword(s):  
Reproductive Performance ◽  
Weight Gains ◽  
The Mean

The effect of choline supplementation (434 mg/kg of diet) on reproductive performance and incidence of spraddle leg condition in baby pigs was studied in two experiments, using 128 gilts (64 Lacombe + 64 Yorkshire) in exp. 1 and 64 primiparous sows and 64 gilts, half from each breed, in exp. 2. In exp. 1 (winter) supplemental choline significantly (P < 0.05) increased the number of live pigs born (9.64 ± 0.41 vs. 7.90 ± 0.31) and weaned (7.50 ± 0.68 vs. 6.73 ± 0.25) for Lacombe, but not for Yorkshire (8.40 ± 0.56 vs. 9.00 ± 0.45 and 7.40 ± 0.33 vs. 8.10 ± 0.33, respectively) gilts. The mean birth weights and weight gains to 3 and 5 wk of age were similar for the control and choline-supplemented groups. In exp. 2 (summer) choline supplementation had very little effect on reproductive performance of gilts or sows from either breed. The incidence of spraddle leg condition was very low in both experiments and was not influenced by choline supplementation. These results indicate that the choline content of barley-wheat-soya diets was adequate for reproduction in Yorkshire gilts and sows, but Lacombe gilts may require supplemental choline during winter for optimum reproductive performance.

scholarly journals Effect of Average Number of Piglets in the First Three Litters of Polish Large White Sows-Family Founders on the Reproduetive Performance of Gilts in the Next Generations

1999 ◽  
Vol 42 (3) ◽  
pp. 255-266
Author(s):  
A. Lewczuk ◽  
J. Rymkiewicz ◽  
B. Grudniewska ◽  
M. Janiszewska ◽  
D. Michalik
Keyword(s):  
Private Sector ◽  
Postnatal Development ◽  
Reproductive Performance ◽  
Large White ◽  
Weight Gains ◽  
Group A ◽  
Group B ◽  
Group D

Abstract. The studies concerned the reproduetive perfonnance of four generations of sows originating from families where the average number of piglets in the first three litters amounted to: 8.1–9.0 (group A), 9.1–10.0 (group B), 10. 1–11.0 (group C) and more than 11.0 (group D). 988 sows and 2964 litters were examined altogether. The average number of piglets reared up to the age of 21 days in the first three litters of sows-family founders has a significant effect on the fertility and feeundity levels of sows in the next generations. The best results are to be expected in the case of sows originating from families where the average number of piglets in three successive litters was higher than 10. Sows coming from families in which the average number of piglets on 21st day was lower do not show promise of equally good reproductive performance, in spite of higher weight gains and better appearance (resulting from better conditions in the periods of pre- and postnatal development). In the private sector there were no sows originating from family founders in the group < 9,0 while 95% of them belonged to groups with average piglet number >10,0.

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 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.

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