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Alimentation durable et élevages porcins

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Visuels d'intervention par Sandrine Espagnol, Space 2019, 10-13 septembre 2019, Rennes (Matinales de l'Ifip), 5 pages

PDF icon Sandrine Espagnol, Space 2019, 10-13 septembre 2019, Rennes (Matinales de l'Ifip), 5 pages
2019

Impacts environnementaux des élevages porcins : quels déterminants et leviers d’action ?

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Visuels d'intervention présentés par Sandrine Espagnol, Space 2019, 10-13 septembre 2019, Rennes (Matinales de l'Ifip), 10 pages

 

PDF icon Sandrine Espagnol, Space 2019, 10-13 septembre 2019, Rennes (Matinales de l'Ifip), 10 pages
2019

Pourquoi PorcProtect ?

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Visuels d'intervention présentés par Isabelle Corrégé, Space 2019, 10-13 septembre 2019, Rennes (Matinales de l'Ifip), 10 pages

PDF icon Isabelle Corrégé, Space 2019, 10-13 septembre 2019, Rennes (Matinales de l'Ifip), 10 pages
2019

Auto-diagnostic de la biosécurité par l'éleveur

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Visuels d'intervention présentés par Anne Hémonic, Space 2019, 10-13 septembre 2019, Rennes (Matinales de l'Ifip), 14 pages

PDF icon Anne Hémonic, Space 2019, 10-13 septembre 2019, Rennes (Matinales de l'Ifip), 14 pages
2019

Toolbox des outils simples et pratiques

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Visuels d'intervention présentés par Michel Marcon et Johan Thomas, Space 2019, 10-13 septembre 2019, Rennes (Matinales de l'Ifip), 5 pages

PDF icon Michel Marcon et Johan Thomas, Space 2019, 10-13 septembre 2019, Rennes (Matinales de l'Ifip), 5 pages
2019

Modèle de prévision de la production porcine : à partir des données BDPORC

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Bérengère Lécuyer, Baromètre Porc (FRA), 2019, n° 500, septembre, synthèse du mois, p. 8

Les données BDPORC sur les mouvements de porcins ont été mobilisées pour modéliser et prédire la production de porcs charcutiers à un horizon de 1 à 5 mois. La part de la variabilité de la production de porcs charcutiers expliquée par le modèle est supérieure à 60 %. Les écarts entre la production réelle et la prévision sont sensibles pour certains mois mais plus réduits à l’échelle du trimestre.

PDF icon Bérengère Lécuyer, Baromètre Porc (FRA), 2019, n° 500, septembre, synthèse du mois, p. 8
2019

Réalité augmentée : un dispositif audio testé en maternité

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Alexia Aubry, Porc Mag (FRA), 2019, n° 545, septembre, p. 40

Des technologies innovantes peuvent aider les éleveurs à enregistrer plus efficacement les performances techniques de leurs porcs, indispensables au suivi et  l'évaluation de leurs résultats économiques.

2019

Toolbox de l'Ifip audite les bâtiments sur smartphone

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Michel Marcon, Réussir Porc/ Tech Porc (FRA), 2019, n° 271, septembre, p. 50-51

L’application Toolbox mise au point par l’Ifip propose quatre calculettes pour un auto-audit simple et rapide de la ventilation, du chauffage, des équipements et de la conduite.

PDF icon Michel Marcon, Réussir Porc/ Tech Porc (FRA), 2019, n° 271, septembre, p. 50-51
2019

Le led, l’éclairage économe en énergie

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Yvonnick Rousselière, Réussir Porc/Tech Porc (FRA), 2019, n° 271, septembre, p. 52-53

L’éclairage à leds gagne du terrain en production porcine, aussi bien en rénovation intérieure qu’en construction neuve.

PDF icon Yvonnick Rousselière, Réussir Porc/Tech Porc (FRA), 2019, n° 271, septembre, p. 52-53
2019

Use of mate allocation in pig crossbreeding schemes: a simulation study

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González-Diéguez D et al., 70th Annual meeting of the European Federation of Animal science (EAAP), 26-30 août 2019, Ghent, Belgique, visuels d'intervention

One of the main goals in a crossbreeding scheme is to improve the performance of crossbred population by exploiting heterosis and breed complementarity. Dominance is one of the likely genetic bases of heterosis and, nowadays, estimating dominance effects in genetic evaluations has become feasible in a genomic selection context. Mate allocation strategies that account for inbreeding and/or dominance can be of interest for maximizing the crossbred performance. The objective of this study was to simulate scenarios including or not mate allocation strategies in two-breed pig crossbreeding schemes. The different crossbreeding scenarios have been compared in terms of genetic gain (within-breed) and total genetic value in crossbred populations. The benchmark scenario is a crossbreeding scheme where within-line selection is performed on purebred genomic estimated breeding values and crossbreds come from random matings of the best purebreds. The other subsequent scenarios are conceived to evaluate the potential benefits of accounting for inbreeding, dominance and crossbred performances in the genetic evaluation model. Genomic mate allocation is a promising strategy to improve the crossbred performance.

Document réservé Espace Pro, veuillez vous identifier
2019

Digestive efficiency is a heritable trait to further improve feed efficiency in pigs

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Vanille Déru (INRA/ France Génétique Porc) et al., 70th Annual meeting of the European Federation of Animal science (EAAP), 26-30 août 2019, Gand, Belgique, visuels d'intervention

The use of diets with dietary fibres from alternative feedstuffs less digestible for pigs is a solution considered to limit the impact of increased feed costs on pig production. This study aimed at determining the impact of an alternative diet with fibres on individual digestive efficiency coefficients, and to estimate their heritabilities and genetic correlations with other production traits. A total of 480 Large White pigs were fed a high fibre diet (FD) and 547 of their sibs were fed a conventional diet (CO). For each animal, digestibility coefficients (DC) of energy, organic matter, and nitrogen were predicted from faeces samples analysed with near infrared spectrophotometry.

Individual daily feed intake (DFI), average daily gain (ADG), feed conversion ratio (FCR) were recorded as well as lean mean percentage (LMP), carcass yield (CY) and meat quality traits. The FD pigs had significantly lower DC than CO pigs (-5 to 6 points). The DC were moderately to highly heritable, with heritabilities ranging from 0.41±0.14 to 0.50±0.15 in CO, and from 0.62±0.17 to 0.70±0.17 in FD. Genetic correlations between DC and ADG (from -0.65 to -0.52), FCR (from -0.75 to -0.33), and DFI (from -0.83 to -0.57) were high and negative in both diets. The DC were slightly unfavourably correlated with CY (from -0.24 to -0.11) and favourably correlated with LMP (from 0.03 to 0.29). Genetic correlations were generally unfavourable with meat quality traits (from -0.75 to 0.09). Genetic correlations of DC between diets were close to 1, so no interaction between feed and genetics could be evidenced for these traits. To conclude, DC measured in farm conditions are interesting criteria for selection to account for animal digestive capacity, due to moderate to high heritabilities and high genetic correlations with FCR.

However, according to these first results, it would have to be selected together with carcass yield and meat quality to avoid adverse genetic trends on the latter traits.

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2019

Control of biotrickling filter efficiency on NH3 emitted by piggeries

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E. Dumont (IMT Atlantique) et al., 70th Annual Meeting of the European Federation Animal Science (EAAP), 26-30 août 2019, Gand Belgique, p. 319, poster

Ammonia emitted by piggeries can be removed using biotrickling filtration. As ammonia is a very soluble compound in water, removal efficiency (RE) around 70-80% can be expected. However, the accumulation of nitrogen salts in water leads to a decrease in RE. Consequently, there is need to improve the management of equipment by controlling the amount of water which has to be discharged and replaced by fresh water in order to limit the accumulation of nitrogen salts. Such an improvement is based on the knowledge of the nitrogen mass balance between the gas phase and the liquid phase. The objective of this study was to establish the nitrogen mass balance of a pilot-scale biotrickling filter treating ammonia emitted by a pig house. The experiment was carried out for 14 weeks on a French pig farm.
The biotrickling filter installed to treat the polluted air generated by 54 fattening pigs was filled with a structured plastic packing WAT NET 150 NC 20/48 (0.9×0.9×0.45 m). The airflow rate was of 1,350 m3/h corresponding to an Empty Bed Residence Time (EBRT) of 1 s. In the gas phase, temperature, relative humidity, ammonia and nitrous oxide concentration were hourly measured. In the liquid phase, temperature, pH, electrical conductivity, and concentration of nitrogen salts (NH4+, NO2-, NO3-) were weekly measured. Results showed that nitrogen mass balances carried out on both phases are in agreement (5% difference). A steady transfer rate of ammonia from the gas phase to the liquid phase was obtained (3.22 gN/h corresponding to 10.0 gN/pig/week). From the measured concentrations of nitrogen salts in the liquid phase, it was calculated that the nitrogen mass transfer was 9.5 gN/ pig/week. Moreover, it was also evidenced that the amount of nitrogen salts dissolved in water could be correlated to the water conductivity. As a result, the measurement of this parameter could be a useful tool to determine the amount of ammonia removed from the gas phase.

PDF icon E Dumont (IMT Atlantique), 70th EAAP, 26-30 août 2019, Gand, Belgique, poster
2019

Modelling growth performance of pigs and within-room thermal balance in different local conditions

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Nathalie Quiniou et al., 70th Annual Meeting of the European Federation Animal Science (EAAP), 26-30 août 2019, Gand, Belgique, visuels d'intervention

A model has been used to assess both direct and indirect consumption of energy by growing pigs fed ad libitum, housed in fattening rooms with various insulation characteristics, and under different outdoor temperatures. This model combines a growth model and a bioclimatic model. It simulates thermal exchanges at the room level, based on interactions between the insulation of the room, available equipment (fans, heaters…), the parameters of the climate control box, the characteristics of pigs, and the feeding strategy. Heat sources are the animals (sensible heat) and heaters when available. Heat losses are due to insulation characteristics of the room and air renewal. The model has been evaluated from data collected simultaneously on pigs, diets, indoor and outdoor temperature (T) during a trial, and the error of prediction of indoor T was below 0.5 °C on an hourly basis. Thereafter, simulation will be performed, based on the same population of pigs and feeding strategy under different outdoor T, different heater powers in the room combined with different insulation level of wall material. For this purpose, four time series of outdoor T have been collected over 12 months (one in France and three from South to North in Sweden), as well as building characteristics in both countries (heater power: from 0 to 26 Watt/fattening place; 1 or 3 insulated layers).

For each combination of climate and building, indoor T and pig performance will be simulated as well as total energy consumption and its partition between direct and indirect components. This research was part of the Pigsys ERA-Net project, co-funded under European Union’s Horizon 2020 RI program (from SuSan, www.era-susan.eu,Grant Agreement n°696231) by the French ANR (grant n°ANR-16-SUSN-0003-02).

PDF icon Nathalie Quiniou et al., 70th EAAP, 26-30 août 2019, Gand, Belgique
2019

Steroidome and metabolome analysis in gilt saliva to identify biomarkers of boar effect receptivity

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G. Goudet (INRA) et al., 70th Annual Meeting of the European Federation Animal Science (EAAP), 26-30 août 2019, Ghent, Belgique, poster

Our objective was to develop alternatives to hormonal treatments to synchronize oestrus of gilts. Before puberty gilts exhibit a pre-puberty period during which boar exposure could induce and synchronize first ovulation. To develop practical non-invasive tools to identify this period an  improve detection of the gilts to stimulate, we searched for salivary biomarkers of the pre-puberty period. Saliva samples were collected from 30 Large-White × Landrace crossbred gilts from 140 to 175 days of age. Gilts were exposed to a boar twice a day and subjected to oestrus detection from 150 to 175 days of age. Among the 30 gilts, 10 were detected in oestrus 4 to 7 days after introduction of the boar and were considered receptive to the boar effect, 14 were detected in oestrus more than 8 days after boar introduction, 6 did not show oestrus and were considered non-receptive. Saliva samples from 6 receptive and 6 non-receptive gilts were analysed for steroidome using GC-MS/MS and for metabolome using 1H-NMR spectroscopy. Four saliva samples per gilt were analysed: 26 days and 11 days before boar introduction (BI-26 and BI-11), the day of boar introduction (BI), 3 days later for receptive gilts (BI+3) or 7 days later for nonreceptive gilts (BI+7). Data were analysed using repeated measures one-way ANOVA and orthogonal partial least squares discriminant analysis. Thirty steroids and 35 metabolites were detected in gilt saliva. The concentrations of 6 steroids were higher (P<0.05) in receptive gilts than in non-receptive gilts at BI-26, BI-11 and BI. The concentration of 2 metabolites were lower (P<0.05) in receptive gilts than in non-receptive gilts at BI-11. These candidates could be potential salivary biomarkers to detect receptive gilts. However, their low and variable concentrations in saliva require expensive analysis and limit their use in pig farms.

Document réservé Espace Pro, veuillez vous identifier
2019

Measuring particles in pig housing

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Solène Lagadec (CRAB) et al., 70th Annual Meeting of the European Federation Animal Science (EAAP), 26-30 août 2019, Gand, Belgique, p. 484, poster

Livestock contributes to the emission of particles in the atmosphere. Literature shows drastic differences between emission factors by animal category related to the measurement methodologies applied. Based on this observation, a project involving research and development organizations has been developed in order to develop a measurement protocol strictly adapted to pig building conditions. The project is organized in 3 steps: (1) identification of specific conditions related to pig building; (2) analysis of metrology equipment able of adapting to these conditions; and (3) development of a protocol adapted to the equipment identified in the previous step. Conclusions of the first step (1) are the following ones: ammonia concentration inside piggery vary between 0 and 50 ppm, relative humidity between 70 and 100% and temperature between -10 and +40 °C. TSP, PM10 and PM2.5 should be measured continuously in the ambience, in the extracted duct and outside. Massic concentrations but also concentration in number of particles per volume unit should be measured. In order to analyse morphology of particles, sampling should be possible.
Analysis of measurement equipment – step (2) – led to choose the optical measurement methodology applied in the GRIMM 1.109 (Intertek). Nevertheless, in order to validate collected data, gravimetric method with simple filter will also be applied. For particle measurements, 24 h sampling period should be achieved in the middle of the corridor (1-1.50 m high). This duration has been chosen in order to integrate diurnal and nocturnal changes inside piggeries.
To calculate the emission factor per fattening pig, three periods (between 14-18 days, 45-50 days and 78-82 days) were identified for measuring particles. The project is currently in progress with the second phase consisting of the implementation of this protocol in commercial pig farms in Western France.

PDF icon S. Lagadec (CRAB) et al., 70th EAAP, 26-30 août 2019, Gand, Belgique, poster
2019

Antimicrobial usage evolution between 2010, 2013 and 2016 in a group of French pig farms

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Anne Hémonic et al., 70th Annual Meeting of the European Federation Animal Science (EAAP), 26-30 août 2019, Gand, Belgique, visuels d'intervention

Monitoring antimicrobial usage in pig farms is a key element of a reduction plan. The objective of this study was to analyse the antimicrobial usage evolution in the same farms between 2010-2013-2016 and to identify the factors of variations. The study monitored antimicrobial usage by weight group in 2016 in 33 farrow-to-finish farms in the West of France. The antimicrobial usage had ever been registered twice for 23 of them in 2010 and 2013 and once for 10 of them in 2013. It was quantified by the number of Course Doses per produced pig per year (nCD/pig). Farmers were asked about the factors that could explain the evolution between 2013-2016. On average, antimicrobial usage significantly decreased over six years (-38%). However, a high variability of individual evolutions was observed: among the 23 farms with three annual data, 43% decreased their use between 2010-2013 (-3 nCD/pig on average) but had a stable use between 2013-2016 (-0,2 nCD/pig). 26% decreased their use between 2010-2013 (-4 nCD/pig on average) and also between 2013-2016 (-2 nCD/pig). 9% increased then decreased their use during the two periods (+4 then -7 nCD/pig). One farm had the opposite trajectory (-9 then +2 nCD/pig) and another always increased its use (+2 then +5 nCD/pig). Among the 33 farms with data in 2013-2016, 36% decreased their use (-2 nCD/pig on average), 39% had a stable use and 24% increased their use (+3 nCD/pig). For sows, suckling piglets and fattening pigs, most of the farms had stable usage between 2013-2016. Only antimicrobial usage for weaned piglets was more frequently reduced. Increases were explained by occurrence of sanitary problems (mainly urogenital, digestive and respiratory problems on sows, piglets and fatteners respectively). Decreases were explained by vaccination, stop of preventive treatments and improvement of herd management. This study highlights the variability of individual trajectories in antimicrobial usage, due to sanitary issues that may be different according to each weight group. It usefully complements the monitoring of average evolution at the country level.

PDF icon Anne Hémonic et al., 70th EAAP, 26-30 août 2019, Gand, Belgique
2019

Early disease detection for weaned piglet based on live weight, feeding and drinking behaviour

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Michel Marcon et al., 70th Annual Meeting of the European Federation Animal Science (EAAP), 26-30 août 2019, Gand, Belgique, visuels d'intervention

Early disease detection is one of the key to effective disease control in farms and reducing antibiotics usage. A batch of 153 weaned piglets was used to test a first machine learning algorithm in order to predict the individual health state of each animal. In order to build the early disease detection algorithm, nine boxes of 17 piglets has been set up with automata. In real time within this section we knew the number of times each animal went to the drinker or the feeder, the quantity of water and feed it took and its weight. As the golden standard to know either a piglet seems healthy or not, the clinical signs will be observed by trained operators on each pig every workday and recorded on a standardized grid (diarrhoea, cough, lameness…). Then, data collected from this batch of 153 piglets were used to create an algorithm with the software R, based on bagging and random forest machine-learning method. The database was split into learning (70%) and testing (30%). We obtained a global success of 86% of good prediction. 
In order to validate the accuracy of the model, a second batch of 153 piglets was used. Every day, a list of predicted sick pigs was printed automatically, indicating the individual identification of the animal, and its pen. Then, the results of these predictions were compared with the golden standard (observations of clinical signs by trained operators). Out of 3,437 observations (including predictions that the piglet is not sick), the algorithm correctly predicted the status of the piglets 2,462 times. Artificial intelligence has made 72% of good predictions. Regarding the true positive results, 96 alerts out of 117 were actually associated with observations of animals suffering mainly
from diarrhoea within two days (82% of success). Now, the aim is to improve this algorithm in different ways: to test accelerometers to check the activity of each piglet; to be more accurate on recording cough by a microphone (SOMO, Soundtalks); to test if some trajectories of behavioural change are linked to specific diseases (lameness, digestive or respiratory disease) and not only to generic disease. These studies will be part of the Healthylivestock project (EC funded H2020 research project).

PDF icon Mchel Marcon et al., 70th EAAP, 26-30 août 2019, Gand, Belgique
2019

Effect of a beneficial flora colonization of pen surfaces on health and performance of pig weaners

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Eric Royer (ancien Ifip, aujourd'hui Idele) et al., 70th Annual Meeting of the European Federation of Animal Science (EAAP), 26-30  août 2019, Gand, Belgique, visuels d'intervention

The objective was to test the effects of a positive biofilm formation on the surfaces of post-weaning piglet facilities.
In total, 494 piglets were used in two experiments using a sanitary challenge. 48 h (d-2) before introduction of piglets, 2 identical rooms of 14 pens were sprayed either with water (Control) or a mix (LP) of selected bacteria strains.
Rooms were exchanged between Exp.1 and Exp.2. In Exp.1 rooms were sprayed again at d 15 and in Exp.2 at d 5, 12, 19, 26 and 33. Environmental challenge for piglets was stronger in Exp.1 than in Exp.2. Wiping samples indicated significantly (P<0.05) higher loads of aerobic bacteria (Lactobacillus spp., Bacillus spp.) in LP pen surfaces in Exp.1 at d 0, 5, and 14 and at d 0, 5, 7 and 35 in Exp.2, suggesting the development of the positive biofilm. Percentage of piglets with regular consistency of faeces was continuously higher in LP rooms in Exp.1 (from d 8 to 21) and Exp.2 (from d 5 to 28). Furthermore, mean scores were significantly improved at d 8 in Exp.1 (3.13 vs 4.50; P<0.01) and in Exp.2 at d 9 (2.19 vs 3.19; P=0.01) and 28 (2.03 vs 2.50; P<0.01). Disease outbreaks occurred two days later in Exp.1 (d 9 vs 7) and five days later in Exp.2 (d 12 vs 7) in LP rooms. However, total numbers of deaths from diarrhoea were similar in both treatments in Exp.1 and 2. In Exp.1, LP piglets had numerically better overall ADFI (794 vs 781 g/d; P>0.10) and ADG (510 vs 499 g/d; P>0.10), and had slightly higher weight at d 42 (29.8 vs 29.4 kg; P>0.10). In Exp.2, ADFI (259 vs 219 g/d; P<0.001) and ADG (211 vs 154 g/d; P<0.001) were significantly increased in the LP treatment in phase 1 (d 0 to 15). Weight was significantly higher for LP piglets at d 15 (11.9 vs 11.0 kg; P<0.001), although it was similar at d 41 (P>0.10). In conclusion, the spraying of a beneficial flora on surfaces may result in a protective positive biofilm that would help the piglets to deal better with the weaning challenges.

PDF icon Eric Royer (ancien IFIP, aujourd'hui Idele) et al., 70th EAAP, 26-30 octobre 2019, Gand, Belgique
2019

Livestock farming systems and the French society: key controversies

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Elsa Delanoue, sociologue (Idele, Ifip, Itavi), 70th Annual Meeting of the European Federation Animal Science (EAAP), 26-30 août 2019, Gand, Belgique, visuels d'intervention

For several years, French livestock farming has been frequently questioned by society. Those questions concern its environmental impact, sanitary risks or animal treatment and ask, more generally, livestock farming’s place among a society that is more and more concerned about its alimentation. To understand this phenomenon, analyse representations on livestock farming that coexist within the society and enlighten agricultural actors on those social evolutions at work, the project ACCEPT, funded by the CASDAR and led by the French Pork and Pig Institute (IFIP), has been carried out between 2014 and 2018. With the aim of identifying the subjects of controversy about breeding in France, all animal productions considered, and to describe the diversity of actors and arguments, both qualitative and quantitative studies were conducted: around seventy interviews were conducted, in France and five other UE countries, with the main stakeholders (livestock farming professionals, farmers, companies, journalists, NGOs, consumers) and more than 2007 French citizens were questioned on a online survey. The analysis of discourses led to classify the debates on the French livestock farming in four major areas: environmental impact, animal welfare, risks to human health and socioeconomic model of livestock farming. It reflects expectations for different types of system: some want a gradual disappearance of intensive farming systems for the benefit of under official quality signs or implementing alternative practices; others want the development of intensive farming to produce more and become more competitive; and between them many want a gradual improvement in the intensive system, with stronger environmental and animal welfare requirements. We consider that we face a global controversy on livestock farming: indeed, beyond specific controversies on practices, debates regarding the very legitimacy of livestock farming or the consumption of animal products gather all the different topics, and are linked with larger society problematics (consumption habits, growth models, globalization, etc.). This feature may complicate the resolution of the controversy and make it hazardous and longer.

PDF icon Elsa Delanoue, sociologue (Idele, Ifip, Itavi) et al., 70th EAAP, 26-30 août 2019, Gand, Belgique
2019

Attitudes of Eastern European consumers towards surgical castration and immunocastration of piglets

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Igor Tomasevic (University of Belgrade, Faculty of Agriculture, Belgrade, Serbia) et al., 65th International Congress of Meat Science and Technology (ICOMST), 4-9 août 2019, Potsdam/Berlin, Allemagne, p. 12-13, poster

Castration of male piglets is a common practice in pig husbandry performed to avoid boar taint, an offensive odour connected mainly with the presence of skatole and androstenone (Claus, Weiler, & Herzog, 1994) that can be perceived during the cooking and/or heating of pork from uncastrated male pigs. Taking into account relatively high animal welfare standards and discrepancy in public interest in farm animal welfare and ethical issues across European countries, generalisation of findings from Western European consumer studies to Eastern European countries would be quite questionable.

Evenmore so because a general insight into Eastern European meat consumers’ perceptions and behaviour is largely unavailable (Font-i-Furnols & Guerrero, 2014), except for a few studies published recently (Tomasevic et al., 2018). The aim of this research was to investigate the attitudes of Eastern European consumers regarding surgical and immuno-castration.

Document réservé Espace Pro, veuillez vous identifier
2019

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