Economic values for traits of pigs in Hungary

Houška, L.; Wolfová, M.; Nagy, István; Csörnyei, Zoltán; Komlósi, István

doi:10.17221/100/2009-cjas

Cited by 16 publications

(18 citation statements)

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“…The EVs of growth rate in a specific time period can easily be converted to EVs for alternative traits to characterise growth ability, for example, animal weight at a certain age or animal age at a fixed weight (Coopman et al, 1999;Bett et al, 2007;Byrne et al, 2010;Houška et al, 2010).…”

Section: Definition Of Traits Characterising the Growth Potential Of mentioning

confidence: 99%

“…Similarly, averages over sexes were used by De Vries (1989) and Houška et al (2010) for fattening and carcass traits of pigs, and by Bett et al (2007) for pre-weaning survival of kids.…”

Section: Definition Of Traits Expressed In Different Sexes or Animal mentioning

confidence: 99%

“…De Vries (1989) divided the growth period of pigs into three stages, assumed linear growth within each segment (growth of piglets till weaning, in rearing and during fattening) and considered mature weight of sows to be a separate trait. These same growth periods were utilised by Houška et al (2004), but they defined weight gain from birth to slaughter as the only growth trait in the breeding objective for pigs.The EVs of growth rate in a specific time period can easily be converted to EVs for alternative traits to characterise growth ability, for example, animal weight at a certain age or animal age at a fixed weight (Coopman et al, 1999;Bett et al, 2007;Byrne et al, 2010;Houška et al, 2010).As shown in this section, growth ability of animals can be described by many different traits. The approaches and assumptions used for the calculation of the EV for a specific growth trait (in particular for mature weight) by different authors are highly variable, having a material impact on the EV of this trait.…”

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Strategies for defining traits when calculating economic values for livestock breeding: a review

Wolfová

Wolf

2013

Animal

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The objective of the present review was (i) to survey different approaches for choosing the complex of traits for which economic values (EVs) are calculated, (ii) to call attention to the proper definition of traits and (iii) to discuss the manner and extent to which relationships among traits have been considered in the calculation of EVs. For this purpose, papers dealing with the estimation of EVs of traits in livestock were reviewed. The most important reasons for incompatibility of EVs for similar traits estimated in different countries and by different authors were found to be inconsistencies in trait definitions and in assumptions being made about relationships among traits. An important problem identified was how to choose the most appropriate criterion to characterise production or functional ability for a particular class of animals. Accordingly, the review covered the following three topics: (i) which trait(s) would best characterise the growth ability of an animal; (ii) how to define traits expressed repeatedly in subsequent reproductive cycles of breeding females and (iii) how to deal with traits that differ in average value between sexes or among animal groups. Various approaches that have been used to solve these problems were discussed. Furthermore, the manner in which diverse authors chose one or more traits from a group of alternatives for describing a specific biological potential were reviewed and commented on. The consequences of including or excluding relationships among economically important traits when estimating the EV for a specific trait were also examined. An important conclusion of the review is that, for a better comparability and interpretability of estimated EVs in the literature, it is desirable that clear and unique definitions of the traits, complete information on assumptions used in analytical models and details on interrelationships between traits are documented. Furthermore, the method and the model used for the genetic evaluation of specific traits in a certain breeding organisation are important for the exact definition of traits, for which the economic values will be calculated, and for the inclusion or exclusion of relationships among traits in the calculation of the EVs in livestock breeding. Keywords: livestock, economic values, definition of traits, relationships among traits ImplicationsA literature review was conducted on different ways of defining traits and considering relationships among them in the calculation of economic values (EVs) in livestock breeding. Diversity among trait definitions makes it difficult to compare EVs from different investigations and individual authors. It was shown that, for the EV of a trait to be correctly interpreted, it is necessary to know exactly how the trait was defined, how its relationships with other traits were accounted for and what assumptions were made in the model for the calculation of EVs. IntroductionHazel (1943) proposed the breeding objective or aggregate genotype of an animal to be defined as 'the sum of its sever...

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Section: Definition Of Traits Characterising the Growth Potential Of mentioning

confidence: 99%

“…Similarly, averages over sexes were used by De Vries (1989) and Houška et al (2010) for fattening and carcass traits of pigs, and by Bett et al (2007) for pre-weaning survival of kids.…”

Section: Definition Of Traits Expressed In Different Sexes or Animal mentioning

confidence: 99%

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Strategies for defining traits when calculating economic values for livestock breeding: a review

Wolfová

Wolf

2013

Animal

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“…The proportion of live born and stillborn piglets often impact on the economic outcome of the farm (Houska et al 2010). Numerous predisposing factors are incriminated in this situation; some are directly related to sows while others are attributed to the piglets themselves (van Dijk et al 2005(van Dijk et al , 2006Alonso-Spilsbury et al 2007).…”

Section: Introductionmentioning

confidence: 99%

Animal welfare in the newborn piglet: a review

Mota-Rojas¹,

Martı́nez-Burnes²,

Villanueva-García³

et al. 2012

Vet. Med. - Czech

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ABSTRACT:The objective of this review is to integrate clinical findings and laboratory analyses in such a way to improve the welfare of newborn piglets and achieve better prognoses of neonatal viability. Deaths during the intrapartum period account for a significant proportion of pre-weaning mortality in farms worldwide. Piglets which die during parturition generally have normal size and typically lack gross lesions at post-mortem examination. However, circulatory abnormalities in the umbilical cord help in assessing piglet viability. Cord lesions can be classified as normal (adhered), oedematous, congested or haemorrhagic and should always be evaluated in perinatal deaths. The likelihood of neonatal survival decreases rapidly as the severity of umbilical cord lesions increase. The physiometabolic blood profile which includes acid-base balance, degree of dehydration, mineral balance, metabolic expenditure and gas exchange are also useful clinical elements for properly assessing neonatal viability. Neonatal survival is notably reduced when the blood pH falls below 7.0, lactate rises above 90 mg/dl, bicarbonate drops below 10 mmol/l, or the pCO 2 increases above 110 mm/Hg. Blood calcium is also an excellent indicator of neonatal stress when used in combination with the other parameters mentioned above. Trembling due to an imbalance in the movement of calcium in muscle is also a factor involved in neonatal mortality. Neurological function in the newborn piglet could also be evaluated by adapting the Apgar score widely used in human perinatology. Neonates with scores lower than 6 in a 10 point scale have generally lower survival rates. The two most important indicators for this vitality score are breathing latency and bradycardia. If the neonate has apnoea for more than 5 min and the cardiac frequency does not increase to more than 110 beats per minute the prognosis for survival is rather poor.

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“…Therefore it is important to have the resources that allow quick and efficient evaluations of the physiological state of newborn piglets. The number of piglets born alive is an indicator of the economic benefits of a farm (Houška et al, 2010).…”

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Porcine neonates failing vitality score: physio-metabolic profile and latency to the first teat contact

Ortega¹,

Mota-Rojas²,

Juárez³

et al. 2011

CZECH J ANIM SCI

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Clinical studies by Mota-Rojas et al. (2007) carried out on commercial pig farms showed that out of 1000 newly born piglets between 150 and 200 animals experienced apnoea after birth and it was related to perinatal asphyxia longer than 30 s, affecting the vitality in a negative way and delaying the latency of connecting to the dam's teat, which represents an economic impact for the producer. In another study where 11 324 farrowings were analysed from 5000 breeding Mexican pig farms, MotaRojas and Ramírez (1996) ABSTRACT:The objective of this study was to compare the metabolic and electrolytic profile as well as the morphological appearance of the umbilical cord and newly born piglets' weight that failed the vitality test scale compared to those who passed. Newborn piglets were divided into three groups according to the vitality with a modified Apgar score at birth: Group 1, failing with a score < 5 (G 1 : n = 218), Group 2 had a score of 6 to 7 (G 2 : n = 439) and Group 3 had scores > 8 (G 3 : n = 464). Results showed significant differences among groups (P < 0.05) in the physio-metabolic pH, PCO 2 , PO 2 , Na + , Ca 2+ , glucose, lactate and bicarbonate values. Regarding weight, temperature and latency to connect the maternal teat, there were also significant differences (P < 0.05) among groups; it took 23.38 min for G 3 while neonatal piglets from G 1 took 30 min longer (P < 0.05) to make the first teat contact. The neonates from the latter group had a higher percentage (75.68%) of broken umbilical cords, with higher birth weight (+200 g, P < 0.05), showed higher than normal blood glucose concentrations, and had lower body temperature at birth (-0.7°C, P < 0.05) and PO 2 in comparison with the other groups of neonates that passed the vitality score. A novel point of this study is the profile characterization of piglets that failed and passed the vitality score; we expect that the data provided may be applicable as reference values of metabolic and electrolyte blood profiles in newborn piglets according to their vitality. In conclusion, this study demonstrates that low vitality newborn piglets had clearly undergone through perinatal asphyxia. Potential indicators increasing this condition are: high birth weight, low body temperature, vitality score ≤ 5, and the presence of the broken umbilical cord at birth.

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Economic values for traits of pigs in Hungary

Cited by 16 publications

References 16 publications

Strategies for defining traits when calculating economic values for livestock breeding: a review

Strategies for defining traits when calculating economic values for livestock breeding: a review

Animal welfare in the newborn piglet: a review

Porcine neonates failing vitality score: physio-metabolic profile and latency to the first teat contact

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