Dietary Conjugated Linoleic Acid (CLA) increases milk yield without losing body weight in lactating sows

Abstract

This study was conducted to evaluate the effects of dietary conjugated linoleic acid (CLA) on the performance of lactating sows and piglets as well as the immunity of piglets suckling from sows fed CLA. Eighteen multiparous Duroc sows with an average body weight (BW) of 232.0 ± 6.38 kg were randomly selected and assigned to two dietary treatments (n = 9 for each treatment), control (no CLA addition) and 1% CLA supplementation. For the control diet, CLA was replaced with soybean oil. Experimental diets were fed to sows during a 28-day lactation period. Litter size for each sow was standardized to nine piglets by cross-fostering within 24 hours after birth. Sow milk and blood samples were taken from sows and piglets after 21 and 27 days of lactation, respectively. Loss of BW was significantly (p < 0.05) higher in sows fed control diet compared to sows fed CLA diet. Piglet weights at weaning and weight gain during suckling were significantly (p < 0.05) higher in sows fed CLA compared to sows fed control diet. Serum non-esterified fatty acid (NEFA) and urea nitrogen concentrations were significantly (p < 0.05) lower in sows fed CLA than in sows fed soybean oil. IgG concentrations of the groups supplemented with CLA increased by 49% in sow serum (p < 0.0001), 23% in milk (p < 0.05), and 35% in piglet serum (p < 0.05) compared with the control group. Sows fed CLA showed an increase of 10% in milk yield compared with sows fed soybean oil (p < 0.05), even though there was no difference in daily feed intake between the treatments. Milk fat content was significantly (p < 0.05) lower in sows fed CLA than in sows fed soybean oil. Solid-not-fat yield was significantly (p < 0.05) higher in sows supplemented with CLA than in sows fed control diet and also protein-to-fat ratio in milk was significantly (p < 0.05) higher in sows fed CLA compared with the control group. The results show that CLA supplementation to sows increased milk yield without losing BW during lactation, whereas soybean oil supplementation resulted in severe BW loss.

Trans-10,cis-12 conjugated linoleic acid reduces milk fat content and lipogenic gene expression in the mammary gland of sows without altering litter performance

“…In the present study, the reduction in milk fat concentration was approximately 20 %, which is in accordance with the results of other studies in sows (approximately 14-36 % (33,34) ). Variation in responses may be due to the level and time of supplementation, the major isomer used, and the genotype and physiological state of the individual animals (11) . A negative effect of CLA on milk protein content was observed in the present study.…”

“…Twenty multiparous sows from a commercial genotype (Aurora Genetics) in their 1st-5th parities and weighing (BW) 200 (SE 10) kg were randomly assigned to one of the following treatments: (1) control, without CLA added to the diet; or (2) 1 % CLA (containing 4•1 % palmitic acid, 3•6 % stearic acid, 27•4 % oleic acid, 1•2 % linoleic acid, 29•8 % cis-9, trans-11-CLA, 29•9 % trans-10, cis-12-CLA and 3•0 % other fatty acids) mixed into the diet. The amount of CLA mixed into the feed was based on the procedure outlined in Lee et al (11) .…”

Efecto de la adición de nopal (Opuntia ficus-indica) a la dieta de cerdas lactantes sobre la producción y calidad de la leche

“…Tal vez por esta razón, ambos grupos analizados presentaron el mismo comportamiento productivo (kg de leche d -1 ). Lee et al (2014;5) observaron una producción promedio de 8.5 kg de leche cerda -1 en lactancia de 21 días. Resultado mayor al encontrado en esta investigación: 7.2 ± 2.2 y 7.4 ± 2.7 kg de leche, para el GT y GE, respectivamente (Tabla 4).…”

“…Esta diferencia entre lo reportado por Lee et al (2014;5) y los resultados de la presente investigación, pudo deberse principalmente a aspectos genéticos, ello sin descartar los aspectos ambientales (Farmer y Quesnel, 2009, 56).…”

Efficacy of methyl ester of conjugated linoleic acid (t10,c12 isomer) for sows and cows for reproduction

“…Two papers reviewed in the previous opinion provided indirect evidence that CLA might improve reproductive performance in sows. Cordero et al (2011) reported a study with 17 lactating sows receiving no CLA and 17 receiving dietary CLA (10 g CLA/kg diet), while Lee et al (2014) described a similar trial with 9 sows per treatment. Both papers reported a statistically significant decrease in loss of backfat in the CLA group during lactation.…”