scholarly journals An Analysis of Culling Patterns during the Breeding Cycle and Lifetime Production from the Aspect of Culling Reasons for Gilts and Sows in Southwest China

Animals ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 160 ◽  
Author(s):  
Chao Wang ◽  
Yinghui Wu ◽  
Dingming Shu ◽  
Hongkui Wei ◽  
Yuanfei Zhou ◽  
...  
Keyword(s):  
Milk Production ◽  
Litter Size ◽  
Reproductive System ◽  
Southwest China ◽  
Breeding Cycle ◽  
Common Disease ◽  
System Disease ◽  
Lactating Sows

To investigate culling patterns during the breeding cycle and lifetime production associated with culling reasons, 19,471 culling records were collected in southwest China. Lifetime pigs born alive (LPBA) and parity for culling reasons, and reason distribution at different parities and breeding cycle were analyzed. Sows culled for stress and death (SD), lameness (LA), common disease (CD), not being pregnant, return to estrus, and abortion (NP) had fewer than 20 LPBA (p < 0.05). Gilts were mainly culled for anestrus beyond nine months (AB9), CD, and LA, while weaned sows were culled for reproductive system disease (RS), CD, and anestrus beyond seven days (p < 0.0033). Gestating sows were mainly culled for NP, CD, and SD, while lactating sows were mainly culled for low or no milk production (NM), poor litter size, and CD (p < 0.0033). Moreover, sows were mainly culled at parity 0, 1, and 2 (p < 0.0024). Besides CD and RS, LA and NP were the primary reasons for parity 1 and 2 culls, respectively. In conclusion, SD, LA, CD, and NP sharply decrease sow lifetime production. AB9, RS, NP, and NM mainly occurred in gilts, weaned, gestating, and lactating sows, respectively. Low parity sows had a higher risk of CD, RS, LA, and NP.

scholarly journals 149 Analysis of culling pattern during breeding cycle and lifetime production from the aspect of culling reasons for gilts and sows in southwest China

2019 ◽  
Vol 97 (Supplement_3) ◽  
pp. 148-149
Author(s):  
Chao Wang ◽  
Jian Peng
Keyword(s):  
Production Efficiency ◽  
Southwest China ◽  
Mixed Linear Model ◽  
Breeding Cycle ◽  
Common Disease ◽  
Primary Reason ◽  
Chi Square ◽  
System Disease ◽  
Lactating Sows ◽  
Chi Square Test

Abstract Unplanned removal of gilts and sows shortens the longevity and decreases the production efficiency. Analyzing and monitoring culling pattern conduces to administrative decisions on productivity and economic results of breeding herds. To investigate culling pattern during breeding cycle and lifetime production from the aspect of culling reasons, 19,471 culling records of 24 pig herds from January 2016 to December 2017 were collected in southwest China. Lifetime pigs born alive (LPBA) and parity for culling reasons were analyzed using mixed linear model (PROC MIXED) with culling reason as fixed effect and farm and year as random effects, respectively. For reason distribution at different parities and breeding cycle analysis, chi-square test (PROC FREQ) was performed for the comparison between any two culling reasons with an adjusted significant level when overall difference was significant. Results showed sows culled for stress and death (SD), lameness (LA), common disease (CD), and return to estrus (NP) had less than 20 of LPBA (P &lt; 0.05). Gilts mainly culled for anestrus beyond 9 months (AB9), CD, and LA, while weaning sows for reproductive system disease (RS), CD, and anestrus beyond 7 days (P &lt; 0.0033). Gestating sows mainly culled for NP, CD, and SD, while lactating sows for low or no milk production (NM), poor litter size, and CD (P &lt; 0.0033). Moreover, sows mainly culled at parity 0, 1, and 2 (P &lt; 0.0024). Besides CD and RS, LA and NP were the primary reason for parity 1 and 2 culls, respectively. In conclusion, SD, LA, CD, and NP sharply decrease sow lifetime production. AB9, RS, NP, and NM mainly occurred in gilts, weaning, gestating, and lactating sows, respectively. Low parity sows had more risks of CD, RS, LA, and NP.

scholarly journals Milk Production of Lacaune Sheep with Different Degrees of Crossing with Manchega Sheep in a Commercial Flock in Spain

Animals ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 520
Author(s):  
Lizbeth E. Robles Jimenez ◽  
Juan C. Angeles Hernandez ◽  
Carlos Palacios ◽  
José A. Abecia ◽  
Anna Naranjo ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Milk Production ◽  
Litter Size ◽  
Milk Yield ◽  
Mixed Model ◽  
The Other ◽  
Commercial Flock ◽  
Parity Number ◽  
Available Information ◽  
Autumn And Winter

The objective of the present study was to evaluate the effect of the grade of crossbreeding (Lacaune x Manchega) and environmental factors on milk production in a commercial flock in Spain. A total of 5769 milk production records of sheep with different degrees of purity of the Lacaune breed crossed with Manchega were used as follows: 100% Lacaune (n = 2960), 7/8 Lacaune (n = 502), 13/16 Lacaune (n = 306), 3/4 (n = 1288), 5/8 Lacaune (n = 441) and 1/2 Lacaune: Manchega (n = 272). Additional available information included the number of parity (1 to 8), litter size (single or multiple), and the season of the year of lambing (spring, summer, autumn and winter). A mixed model was used to evaluate the level of crossbreeding and environmental factors on milk production. The 100% Lacaune sheep presented the highest milk production with respect to the F1 Lacaune x Manchega sheep (p < 0.01), showing that as the degree of gene absorption increases with the Manchega breed, it presents lower milk yield. The 100%, 13/16, and 3/4 Lacaune genotypes had the highest milk yields with respect to the 1/2 Lacaune/Manchega breed (p < 0.001). The Lacaune registered on average 181.1 L in a period adjusted to 160 days of lactation (1.13 L/ day). Likewise, the parity number, litter size, and season of lambing effects showed significant differences (p < 0.01). It was concluded that 13/16 and 3/4 Lacaune/Manchega ewes presented the highest milk yields with respect to the other crosses.

Milk Production in Lactating Sows and Time Lengths Used in Evaluating Milk Production Estimates

1971 ◽  
Vol 33 (1) ◽  
pp. 35-37 ◽  
Author(s):  
D. C. Mahan ◽  
D. E. Becker ◽  
H. W. Norton ◽  
A. H. Jensen
Keyword(s):  
Milk Production ◽  
Lactating Sows

scholarly journals Hycole Doe Milk Properties and Kit Growth

Animals ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 214
Author(s):  
Agnieszka Ludwiczak ◽  
Joanna Składanowska-Baryza ◽  
Beata Kuczyńska ◽  
Marek Stanisz
Keyword(s):  
Somatic Cell ◽  
Cell Count ◽  
Milk Production ◽  
Litter Size ◽  
Somatic Cell Count ◽  
Quality Traits ◽  
Litter Weight ◽  
Daily Milk Production ◽  
Rabbit Milk ◽  
Daily Milk

The level of production and the physiochemical traits of rabbit milk affect the growth and the mortality of bunnies during lactation. The goal of the study was to analyze the effect of litter size and day of lactation on the quality traits of rabbit milk, milk production, and associative traits. The study was conducted on 32 Hycole does and their litters. The rabbit milk pH ranged from 6.61 to 7.46. The colostrum was characterized by the highest content of total solids (31.54 and 31.80 g kg−1) and fat content (15.73 and 15.9 g kg−1). The milk from the beginning of the lactation was characterized by the highest level of somatic cell count (SCC) (523.67 and 536.57 103 mL−1), which gradually decreased to reach the lowest level on days 17 and 21 of lactation. The daily milk production was greater for does nursing 10 kits per litter compared to those nursing eight kits per litter (p < 0.001). The peak of milk production occurred on day 17 postpartum. To conclude, the litter size has a clear effect on milk production as well as litter weight and litter weight gains. It is also important to note that the day of lactation affected the physiochemical traits of rabbit milk.

Sow litter size is increased in the subsequent parity when lactating sows are fed diets containing n-3 fatty acids from fish oil1

2011 ◽  
Vol 89 (9) ◽  
pp. 2731-2738 ◽  
Author(s):  
R. J. Smits ◽  
B. G. Luxford ◽  
M. Mitchell ◽  
M. B. Nottle
Keyword(s):  
Fatty Acids ◽  
Litter Size ◽  
Lactating Sows

164 Feeding a Diet with a Near Optimal Amino Acid Profile Improves Energy Utilization for Milk Production in Lactating Sows.

2018 ◽  
Vol 96 (suppl_2) ◽  
pp. 87-87
Author(s):  
S Zhang ◽  
J S Johnson ◽  
M Qiao ◽  
J Liesman ◽  
N L Trottier
Keyword(s):  
Amino Acid ◽  
Milk Production ◽  
Amino Acid Profile ◽  
Energy Utilization ◽  
Lactating Sows

scholarly journals Regulation of serum leptin and its role in the hyperphagia of lactation in the rat

2003 ◽  
Vol 176 (2) ◽  
pp. 193-203 ◽  
Author(s):  
RG Denis ◽  
G Williams ◽  
RG Vernon
Keyword(s):  
Energy Balance ◽  
Food Intake ◽  
Milk Production ◽  
Litter Size ◽  
High Energy ◽  
Negative Energy ◽  
Negative Energy Balance ◽  
Calorie Intake ◽  
Serum Leptin ◽  
Nocturnal Rise

The factors regulating serum leptin concentration and its relationship to the hyperphagia of lactation have been investigated in rats. Lactation results in hypoleptinaemia and loss, or at least marked attenuation, of the nocturnal rise in serum leptin. Litter removal resulted in a fall in food intake and restoration of the nocturnal rise in serum leptin. Returning the litter to the mother after a 48-h absence increased food intake and began to reinitiate milk production, but the nocturnal serum leptin levels were still increased at 48 h after litter restoration. Adjusting litter size to four, eight, ten or fourteen pups at parturition resulted in different rates of litter growth and food intake during the subsequent lactation, but had no effect on the degree of hypoleptinaemia. Reducing litter size from ten to four pups at mid-lactation resulted in a transient increase in both serum leptin and pup growth rate, while food intake fell to a level found in rats suckling four pups throughout lactation. Reducing milk production by injection of bromocriptine increased serum leptin, but did not restore the nocturnal rise in serum leptin; food intake decreased, but remained much higher than in non-lactating rats. Feeding a varied, high-energy diet resulted in a decrease in the weight of food ingested, but no change in calorie intake, and had no effect on the hypoleptinaemia. These studies suggested that the hypoleptinaemia of lactating rats is due to negative energy balance, but the loss of the nocturnal rise in serum leptin is due to the suckling stimulus. The negative energy balance of lactation does not appear to be caused by a physical constraint on food intake. While the hypoleptinaemia should facilitate the hyperphagia of lactation, other orexigenic signals must also be involved.

scholarly journals Breeding and exploitation of prolific breeds in Czechoslovakia

1988 ◽  
Vol 60 (6) ◽  
pp. 505-510
Author(s):  
V. Jakubec ◽  
J. Křižek
Keyword(s):  
Mortality Rate ◽  
Milk Production ◽  
Litter Size ◽  
Fibre Diameter ◽  
Carcass Weight ◽  
Meat Production ◽  
Wool Production ◽  
Production Increase ◽  
Daily Gain

In the years 1971—1979 many experiments were conducted in order to elucidate problems of meat production increase in sheep. Ewes of native breeds (Mutton Merino = M, Improved Wallachian = I) were mated to rams of prolific breeds (Finnsheep = F, Romanov = R), producing F1 crossbred females. The crossbred ewes were mated to rams of a third mutton breed (Texel, Dorset Down, M) to produce meat lambs. In experiments from 1980 to 1987on the basis of the I and the R and F crossbred combinations were produced to provide contemporary comparison of purebreds, F1, F2 and backcrosses, both to I and to F and R. The purebred and crossbred populations were analysed for the estimation of crossbreeding parameters necessary for the optimization of the formation of a synthetic dam breed. The reproduction characters which were analysed were fertility, prolificacy, mortality rate, litter size (born and weaned) and milk production. From the wool production characters the greasy wool production, clean wool production and mean fibre diameter were of interest. From the production characters the following were analysed: birth, weaning and slaughter weights, daily gain from birth to weaning or slaughter, carcass weight and other carcass value traits.

Sign in / Sign up

Export Citation Format

Share Document