- Pig

Relationship between piglet delivery weight and pre-weaning mortality – Articles


Commented article


Feldpausch JA, Jourquin J, Bergstrom JR, Bargen JL, Bokenkroger CD, Davis DL, Gonzalez JM, Nelssen JL, Puls CL, Trout WE, Ritter MJ. Delivery weight threshold for figuring out piglets in danger for pre-weaning mortality. Translational Animal Science. 2019; 3(2): 633-640. doi: 10.1093/tas/txz076


Learn the article abstract


Remark


A complete of 394 litters have been used; partly American knowledge (A; 216 litters and a pair of,205 piglets) and partly Spanish knowledge (S; 178 litters and 1,865 piglets). The imply litter measurement (Whole Born) was 13.18 piglets (12.22 A and 14.34 S) and the imply pre-weaning mortality was 12.2% (9.6% A and 15.2% S). Genetics have been LDXLW sow x Hampshire boar in A and LWxLD dams and Pietrain sire in S. Lactation size various between 22 and 28 days in A and between 21 and 29 days in S. The statistical process used relies on logistic regression fashions and is detailed within the abstract.


The outcomes present that the imply threshold delivery weight is 1.11 kg (1.09 for E and 1.13 for S). Total, 15.2% of the piglets had a mean delivery weight equal to or lower than 1.11 kg measured throughout the first 24 hours of life, and confirmed 34.4% pre-weaning mortality, whereas the heaviest piglets had solely 8.2% mortality. Piglets born at lower than 1.1 kg are nearly six occasions extra more likely to die throughout lactation than heavier piglets. The authors present different trials performed in recent times the place the edge weight varies between 1.0 and 1.2 kg at delivery.

Figure 1. Effects of piglet birth weight on pre-weaning mortality across various studies. Feldpausch et al. (2019) values are based on the predicted pre-weaning mortality values of the current work. Values for Zeng et al. (2018) were derived from a prediction equation published by those authors. Source: Feldpausch et al., 2019.

Determine 1. Results of piglet delivery weight on pre-weaning mortality throughout varied research. Feldpausch et al. (2019) values are primarily based on the anticipated pre-weaning mortality values of the present work. Values for Zeng et al. (2018) have been derived from a prediction equation printed by these authors. Supply: Feldpausch et al., 2019.



The outcomes recommend that the edge delivery weight is just not constant and relies upon, amongst different components, on prolificacy and baseline mortality throughout lactation; the upper the prolificacy and pre-weaning mortality, the upper the edge weight. One other facet of curiosity is the proportion of piglets under the edge weight, which tends to be increased the upper the prolificacy. However, it’s identified that there are three forms of piglets with low delivery weight: a) these with intrauterine progress restriction (IUGR) whose productive future is extremely compromised and which might be differentiated from the remainder by their “dolphin-like” head and different morphological options, b) small piglets that in later levels will undergo an evident delay in progress and can fall behind and c) small piglets that in later levels can have passable efficiency and might even meet up with different people that have been heavier at delivery.


In apply, relying on prolificacy and baseline mortality as a consequence of facility, sanitary, and administration circumstances, it might not be as vital to know the edge delivery weight that’s instantly associated to pre-weaning mortality as it’s to have the ability to differentiate the three forms of so-called “small” piglets in order that after weaning they are often completed in numerous programs or manufacturing strains. Moreover, along with prolificacy, there are at the least two different administration components which might be decisive in reaching the next delivery weight: 1) making certain that gestation is accomplished to time period; the gestation size of hyperprolific sows exceeds 115 days and figuring out its true period helps to optimize piglet delivery weight and a pair of) reaching good embryo implantation and making certain right placentation throughout the first two months of gestation favors subsequent fetal improvement. It’s attention-grabbing to notice that incorrect use of the strategies developed throughout mating (e.g. insemination) and farrowing (e.g. inducing) will enhance the proportion of sort “a” and “b” piglets, that are probably the most weak.





Abstract of commented article


Feldpausch JA, Jourquin J, Bergstrom JR, Bargen JL, Bokenkroger CD, Davis DL, Gonzalez JM, Nelssen JL, Puls CL, Trout WE, Ritter MJ. Delivery weight threshold for figuring out piglets in danger for preweaning mortality. Translational Animal Science. 2019; 3(2): 633-640. doi: 10.1093/tas/txz076


Strategies: A number of research have steered there’s a important relationship between piglet delivery weight and pre-weaning mortality. Thus, the target of the present work was to determine a delivery weight threshold worth for pre-weaning mortality. Delivery weight and survival knowledge from two research involving a mixed complete of 4,068 piglets from 394 litters on 4 industrial farms (three European, one U.S.) have been compiled for a pooled, multistudy evaluation. Total pre-weaning mortality throughout the 2 research was 12.2%. Key variables used within the evaluation have been piglet delivery weight (measured inside 24 h of delivery) and corresponding survival end result (lifeless or alive) by weaning at 3–4 wk of age. A combined results logistic regression mannequin was match to estimate the connection between pre-weaning mortality and delivery weight. A random impact of examine was included to account for total variations in mortality between the 2 research. A piecewise linear predictor was chosen to greatest signify the drastic lower in pre-weaning mortality discovered as delivery weight elevated within the vary of 0.5–1.0 kg and the much less excessive change in weight above 1.0 kg. The change level of the delivery weight and pre-weaning mortality mannequin was decided by evaluating mannequin match primarily based on maximizing the chance over the interval starting from 0.5 to 2.3 kg delivery weight.


Outcomes: Outcomes from the evaluation confirmed a curvilinear relationship between delivery weight and pre-weaning mortality the place the delivery weight change level worth or threshold worth was 1.11 kg. Within the mixed knowledge set, 15.2% of pigs had delivery weights ≤1.11 kg. This subpopulation of pigs had a 34.4% pre-weaning mortality charge and represented 43% of complete pre-weaning mortalities.


Conclusion: These findings indicate interventions focused at decreasing the incidence of piglets with delivery weights ≤1.11 kg have potential to enhance piglet survivability. Further analysis is required to validate 1.11 kg because the delivery weight threshold for elevated danger of pre-weaning mortality.

About florenc85

Read All Posts By florenc85

Leave a Reply

Your email address will not be published.