Efeito da ordem de parto e da perda de peso durante a lactação no desempenho reprodutivo subsequente de matrizes suínas

Mellagi, Ana Paula Gonçalves; Panzardi, Andrea; Bierhals, Thomas; Gheller, Neimar Bonfanti; Bernardi, Mari Lourdes; Wentz, Ivo; Bortolozzo, Fernando Pandolfo

doi:10.1590/s0102-09352013000300030

Cited by 10 publications

(8 citation statements)

References 23 publications

(18 reference statements)

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“…Os pesos das porcas ao parto (PP) e ao desmame (PD) diferiram significativamente em função da ordem do parto, mas não em decorrência dos tratamentos (Tabela 2), resultado este que está diretamente relacionado ao maior desenvolvimento corporal de fêmeas de segundo ciclo em relação às fêmeas de primeiro parto (MELLAGI et al, 2013).…”

Section: Resultsunclassified

Betaine in the diet of sows in the first or second reproductive cycle

Andrade

Watanabe

Araújo

et al. 2016

Revista Ciência Agronômica

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Section: Resultsunclassified

Betaine in the diet of sows in the first or second reproductive cycle

Andrade

Watanabe

Araújo

et al. 2016

Revista Ciência Agronômica

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“…This way it is possible to infer that the sow capacity in mobilizing body reserves for milk production is conditioned to the thermal environment in which she is kept, and also the interaction of the factors related to the body weight of the piglets (King et al, 1997), number of sucklings (Audist st al., 2000), parturition order, lactation stage, litter size, diet and metabolic status of the sow (Kim et al, 2001). al., 2006) or the reduction in the number of piglets born in the subsequent parturition (Mellagi at al., 2013). According to Gourdine et al (2006) this increase in the weaning-estrus interval is due to the amplification of the puerperal hypothalamic inhibition, more pronounced in primiparous sows.…”

Section: Methodsmentioning

confidence: 99%

Cooling ventilation at farrowing for sows from first to third parturition

et al. 2019

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This study aimed to evaluate the thermal comfort considering natural and cooling ventilation on the performance, physiological parameters and thermal comfort indices for sows from first to third parturition. A total of 30 sows from commercial lineage (genetic base Landrace x Large White) initially weighing 252.3±5.7, 280.8±9.5 and 324.5±4.8 kg at first, second and third parturition, respectively, were distributed in a 3x2 factorial arrangement, considering the three parturition orders and the two ventilation methods, with five replicas per treatment. The effect of ventilation methods and times of the day on relative humidity, radiant thermal load, temperature and humidity index and black globe humidity index. There was an interaction among ventilation methods and parturition order for sow weight at weaning and daily feed intake. Regarding the females physiological parameters, with the exception of rectal temperature, there was an interaction between ventilation methods and times of the day. The thermal conditioning using cooling ventilation provides better values for thermal comfort indexes of the sows and promotes an increase in feed intake, mainly in gilts.

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“…Young females tend to consume lower amount of feed during the lactation phase leading to subsequent higher weight loss [3,6]. A logical consequence of this physiological condition in these females is an inadequate development and oocyte maturation [16], which directly affects the litter size in subsequent farrowing and increases the chance of reproductive failure in the next cycle [13]. In the present study, although the body weight was not recorded at the first farrowing and weaning, some decrease in farrowing rate was expected for primiparous sows but no difference was detected between the four groups.…”

Section: Discussionmentioning

confidence: 99%

Reproductive Performance, Retention Rate, and Age at the Third Parity According to Growth Rate and Age at First Mating in the Gilts with a Modern Genotype

Faccin

Laskoski

Lesskiu

et al. 2017

Acta Scientiae. Vet.

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Background: Gilts represent the largest category (18-20%) of female pigs in a breeding herd. Under field conditions, the amplitude of growth rate and age at the first mating of gilts are remarkably higher than the recommendations made by the genetic companies. There are several studies that have considered the management of these animals starting from their introduction to the herd till the mating. It has been noted that the genetic selection constantly promotes evolution that may change certain traits of these animals. However, there is a lack of the studies that evaluate the management strategies suitable for the modern sows. This study, therefore, aimed to evaluate the effect of age and growth rate of gilts at the first mating on productive performance and retention rate until the third farrowing.Materials, Methods & Results: The study was performed in a gilt development unit (GDU) with a breeding stock capacity of 1000 females and a goal of 90 gilts mating per week. The groups were retrospectively created according to age (<210 d and ≥210 d) and the growth rate (GR; <700 g/d and ≥700 g/d) at the first mating with a 2 × 2 factorial design. A real-time ultrasound examination was performed at approximately 28 days after artificial insemination to detect pregnancy. Afterward, the productivity data over three parities of 703 females were collected and analyzed at 28 commercial farms of destination. The analyses were performed using SAS, with individual gilts as the experimental unit. The total number of piglets born and the age at the third parity were analyzed using the PROC MIXED. The number of estrus at breeding, weaning-to-estrus interval and the number of piglets in the previous farrowing were included as covariates in the model of total piglets born. The farrowing rate and retention rate until the third parity were considered as binary responses and analyzed using logistic regression (PROC GLIMMIX). The effects of age, GR, and their interaction were included as fixed effect in all analyses. There was no effect of age and GR and their interaction (P > 0.05) on farrowing rate after first, second, and third mating. The total number of piglets born in the three first farrowing and over three parities were not affected (P > 0.05) by the age and GR at first mating. The retention rate until the third farrowing of gilts inseminated with more than 210 days of age was approximately 7% greater than in the gilts mated younger; however, no statistical difference (P > 0.05) was detected. An effect of the age at the first mating was observed in the age to reach the third farrowing. Gilts mated with less than 210 and more than 210 days reached the third farrowing, respectively, at 604.5 ±1.9 and 625.1 ± 2.7 days of age (P < 0.001).Discussion: With a minimum GR of 550 g/d, 180 days of age, and at least 130 kg of weight, gilts are eligible to be inseminated without impairing their litter size, farrowing, and retention rate until the third parity. The gilts having modern genotypes can have a high stillbirth rate if bred with an excessive body weight. It is worth to consider that the gilts inseminated with > 700g/d did not present overweight in this study. The reproductive performance expressed by farrowing rate and piglets born and the longevity expressed by the retention rate from the first pregnancy until the third parturition were not impaired by the groups of age and GR in Large White × Landrace crossbred (Camborough 23®). In addition, gilts inseminated earlier than 210 days but having the minimum required weight resulted in less non-productive days for the breeding herd, which represents an important financial rate to the system.

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Efeito da ordem de parto e da perda de peso durante a lactação no desempenho reprodutivo subsequente de matrizes suínas

Cited by 10 publications

References 23 publications

Betaine in the diet of sows in the first or second reproductive cycle

Betaine in the diet of sows in the first or second reproductive cycle

Cooling ventilation at farrowing for sows from first to third parturition

Reproductive Performance, Retention Rate, and Age at the Third Parity According to Growth Rate and Age at First Mating in the Gilts with a Modern Genotype

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