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Le lisier de porc est bien valorisé par les prairies du Massif central

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Pascal Levasseur, Réussir Porc/Tech Porc (FRA), 2021, n° 287, avril, p. 28-29

Dossier : Massif Central

Le lisier de porc sur les prairies est un échange gagnant-gagnant entre les productions porcines et bovines. Des spécifi cités doivent cependant être prises en compte.

PDF icon Pascal Levasseur, Réussir Porc/Tech Porc (FRA), 2021, n° 287, avril, p. 28-29
2021

Le phosphore, une contrainte réglementaire, même en zone à faible densité porcine

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Pascal levasseur, Réussir Porc/Tech Porc (FRA), 2021, n° 287, avril, p. 29

Dossier : Massif Central

Bien que le Massif central dispose d’une faible densité porcine,...

PDF icon Pascal levasseur, Réussir Porc/Tech Porc (FRA), 2021, n° 287, avril, p. 29
2021

ThermiPig simule les performances des porcs selon le climat

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Nathalie Quiniou, Michel Marcon (Ifip) et Ludovic Brossard (Inrae), Réussir Porc/Tech Porc (FRA), 2021, n° 287, p. 34-35

L’Ifip et Inrae développent un outil qui permet d’évaluer l’impact du climat sur les porcs en engraissement selon les caractéristiques de la salle, les équipements et la conduite.

PDF icon Nathalie Quiniou, Michel Marcon (Ifip) et Ludovic Brossard (Inrae), Réussir Porc/Tech Porc (FRA), 2021, n° 287, p. 34-35
2021
GBP de biosécurité pour le transport des porcs

GBP de biosécurité pour le transport des porcs

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Les données scientifiques actuelles ne permettent pas d’établir de manière certaine les procédures et les équipements nécessaires pour assurer l’efficacité des opérations de nettoyage-désinfection des véhicules de transport de porcs vivants en particulier sur les.

PDF icon GBP de biosécurité pour le transport des porcs
2021

New insights into the chemical reactivity of dry-cured fermented sausages: Focus on nitrosation, nitrosylation and oxidation

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Aline Bonifacie (Ifip/Inrae) et al., Foods, 2021, volume 10, n° 4, avril, 15 pages

Nitrite and nitrate are added to cured meat for their bacteriological, technological and sensorial properties. However, they are suspected to be involved in the formation of nitroso compounds (NOCs), such as potentially mutagenic nitrosamines, nitrosylheme and nitrosothiols. Controlling the sanitary and sensorial qualities of cured meat products by reducing these additives requires elucidating the mechanisms involved in the formation of NOCs. To this end, we studied the dose-response relationship of added sodium nitrite and/or sodium nitrate (0/0, 80/80, 0/200, and 120/120 ppm) on the formation of NOCs in dry cured fermented sausages. The results showed a basal heme iron nitrosylation in the absence of NaNO2/NaNO3 due to starter cultures. This reaction was promoted by the addition of NaNO2/NaNO3 in the other conditions. Reducing the dose to 80/80 ppm still limits lipid oxidation without the formation of non-volatile nitrosamines. Conversely, the addition of NO2/NO3 slightly increases protein oxidation through higher carbonyl content. The use of 80/80 ppm could be a means of reducing these additives in dry-cured fermented meat products.

source : https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8070781/pdf/foods-10-00852.pdf

2021

Programme des e-formations Teach In Pig

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PDF icon fiche_formation_eleraning_2.pdf
2021

Dimensionner correctement la gaine d’extraction

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Yvonnick Rousselière, Réussir Porc/ Tech Porc (FRA), 2021, n° 286, février-mars, p. 24

Avec un double système de ventilation partagée,..

PDF icon Yvonnick Rousselière, Réussir Porc/ Tech Porc (FRA), 2021, n° 286, février-mars, p. 24
2021

Ventilation partagée et lavage, un duo gagnant

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Nadine Guingand, Réussir Porc/ Tech Porc (FRA), 2021, n°286, février-mars, p. 22-24

À la station expérimentale de l’Ifip à Romillé, un nouveau concept de ventilation et de lavage permet un investissement et des frais de fonctionnement moins important pour une efficacité équivalente à un laveur classique.

PDF icon Nadine Guingand, Réussir Porc/ Tech Porc (FRA), 2021, n°286, février-mars, p. 22-24
2021

Reducing environmental impacts of feed using multiobjective formulation: What benefits at the farm gate for pig and broiler production?

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Bertrand Méda (Inrae) et al., Animal, 2021, volume 15, n° 1, janvier, 9 pages

Feed production is the main contributor to several environmental impacts of livestock. To decrease environmental impacts of feed, those of feedstuffs should be considered during formulation. In particular, multiobjective feed formulation (MOF) can help reduce several environmental impacts simultaneously while keeping any increase in feed price moderate. The objective of this study was to assess environmental benefits of MOF at the farm gate for fattening pigs and broilers. For pigs, three feeding strategies were tested: classic 2-phase (2P), 2-phase with lower net energy content (2P −), and multiphase (MP). For broilers, two strategies were tested: classic 3-phase (3P) and 3-phase with higher digestible amino acid contents and lower metabolisable energy content (3P +). Diets were formulated using both least-cost formulation (LCF) and MOF, yielding six pig scenarios and four broiler scenarios. Environmental impacts at the farm gate were estimated using a modelling approach based on life cycle assessment. Indicators for six impact categories were then calculated: climate change (CC), cumulative non-renewable energy demand (CEDNR), acidification (AC), eutrophication (EU), land occupation (LO), and phosphorus demand (PD). As expected, MOF had lower farm-gate impacts than LCF (as much as − 13%), but the degree of decrease varied by feeding strategy and impact. For pigs, MOF was equally effective in all strategies at reducing PD (− 6 to − 9%) and AC (− 2%). In contrast, MOF was more effective in 2P and 2P − at decreasing CC (− 5% to − 7%), LO (− 9% to − 13%) and EU (− 6% to − 8%) than in MP (CC: − 2%; LO: − 4%; EU: − 3%). The benefit of MOF was found greater in 2P (− 7%) than in other pig strategies for CEDNR (− 3 to + 0%). For broilers, MOF was equally effective in both strategies tested at decreasing PD (− 12%), AC (− 2%), and EU (− 4%). For CC and CEDNR, MOF was more effective in 3P (CC: − 9%; CEDNR: − 11%) than 3P + (− 6% for both impacts), but not for LO (+ 3% in 3P vs − 1% in 3P +). These differences were due mainly to differences in animal performance (especially feed conversion ratio) among the strategies tested. Finally, in all scenarios, gross margin at the farm gate decreased with MOF comparatively to LCF (pigs: − 3% to − 11%); broilers: − 7% to − 11%). These results demonstrate the importance of comprehensive economic and environmental optimisation of feeding strategies by simultaneously considering feed impacts, animal performance, and manure management. To do so, further research is therefore required to develop new modelling tools.

Source : https://www.sciencedirect.com/science/article/pii/S1751731120300240/pdfft?md5=6073f5f360dd45a54064b0301408a5b4&pid=1-s2.0-S1751731120300240-main.pdf

2021

Human–animal relationship influences husbandry practices, animal welfare and productivity in pig farming

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Françoise Pol (Anses) et al., Animal, 2021, volume 15, n° 2, 10 pages

The nature of the relationship between humans and farm animals has multiple repercussions on the animals and the farmers and varies with farmers attitudes towards their animals. In particular, this relationship influences animal welfare and human working conditions. The present study, part of a larger research project investigating human–animal relationship (HAR) in pig farming and ways to improve it, had two objectives: 1) to investigate the HAR in a diversity of pig farming situations and to evaluate the possible correlation between farmer attitudes, pigs' reactions to humans, husbandry practices, animal health, welfare and productivity and 2) to find a way to rapidly assign a farmer to a profile, in order to better adapt course content during training sessions on HAR. The study focused on 52 farrow-to-finish farms and consisted of a semi-structured interview with the farmer, observations of the farmer in contact with his/her livestock, two human approach tests conducted on sows and growers and productivity data. Finally, a questionnaire was left at the farm to be filled out by all stockpersons on the farm. Interviews, analyzed using a thematic analysis followed by multiple correspondence analysis and ascendant hierarchical clustering, showed that some farmers develop husbandry practices to improve their HARs and identified three farmer profiles that have been named in relation to the place of the HAR in their profession: Profile 1 farmers for whom HAR is secondary in their work with their pigs, Profile 2 for whom the HAR is useful in their work with their pigs and Profile 3 for whom HAR is central in their work with their pigs. Logistic regression models of the relationships between behavioral tests and productivity data showed that confident sows produce and wean more piglets than fearful sows and that sows of Profile 3 farmers trust more humans than those of Profile 1 or 2 farmers. Farmers' responses to the questionnaire did not predict their profile assignment. Our results confirm the main role of the farmer's attitude towards animals on their farming practices, animal welfare and productivity. The farmers who have more confident pigs and better productivity are those for whom the farm animal is central to their profession, express the most pleasure in working with them and convey empathy for them.

https://www.sciencedirect.com/science/article/pii/S1751731120301051/pdfft?md5=15c30d0146a25883a027ebd1551c29ab&pid=1-s2.0-S1751731120301051-main.pdf

2021

Estimation of dairy goat body composition: A direct calibration and comparison of eight methods

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Sylvain Lerch (Agroscope, Suisse) et al., Methods, 2021, volume 186, février, p. 68-78

The objective was to compare eight methods for estimation of dairy goat body composition, by calibrating against chemical composition (water, lipid, protein, mineral and energy) measured post-mortem. The methods tested on 20 Alpine goats were body condition score (BCS), 3-dimension imaging (3D) automatic assessment of BCS or whole body scan, ultrasound, computer tomography (CT), adipose cell diameter, deuterium oxide dilution space (D2OS) and bioelectrical impedance spectroscopy (BIS). Regressions were tested between predictive variates derived from the methods and empty body (EB) composition. The best equations for estimation of EB lipid mass included BW combined with i) perirenal adipose tissue mass and cell diameter (R2 = 0.95, residual standard deviation, rSD = 0.57 kg), ii) volume of fatty tissues measured by CT (R2 = 0.92, rSD = 0.76 kg), iii) D2OS (R2 = 0.91, rSD = 0.85 kg), and iv) resistance at infinite frequency from BIS (R2 = 0.87, rSD = 1.09 kg). The D2OS combined with BW provided the best equation for EB protein mass (R2 = 0.97, rSD = 0.17 kg), whereas BW alone provided a fair estimate (R2 = 0.92, rSD = 0.25 kg). Sternal BCS combined with BW provided good estimation of EB lipid and protein mass (R2 = 0.80 and 0.95, rSD = 1.27 and 0.22 kg, respectively). Compared to manual BCS, BCS by 3D slightly decreased the precision of the predictive equation for EB lipid (R2 = 0.74, rSD = 1.46 kg), and did not improve the estimation of EB protein compared with BW alone. Ultrasound measurements and whole body 3D imaging methods were not satisfactory estimators of body composition (R2 ≤ 0.40). Further developments in body composition techniques may contribute for high-throughput phenotyping of robustness.

source : https://reader.elsevier.com/reader/sd/pii/S1046202320301407?token=7AFF32A92CED9F97FEF83FD31ACBF07C617A519A96EBC2508702057978936FBA06C14FD12CE2088CB276DB560551A4A7

2021

Fiche technique San€co'Sim : le coût de la biosécurité

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San€co’Sim est une application web qui concrétise les projets liés à la biosécurité en :
➲➲Recensant des coûts liés à la mises en place de mesures de biosécurité ;
➲➲Permettant de choisir plusieurs mesures à mettre en place dans son élevage, d’adapter les quantités en fonction de ses besoins, d’estimer ses annuités en cas d’investissement lourds ;
➲➲Calculant automatiquement les dépenses annuelles liées à la mise en place de ces mesures.
Cette fiche technique présente les montants de mesures de biosécurité recensés dans San€co’Sim par chapitre.

PDF icon Fiche technique San€co'Sim
2021

Développement d’un procédé de pesée par imagerie 3D en élevage de porcs

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Yvonnick Rouselière, Michel Marcon et Mathieu Monziols, Innovations Agronomiques (FRA), 2021, volume 82, février, p. 315-324

L’amélioration des processus en élevage présuppose la connaissance du poids des animaux, a minima ponctuellement mais aussi désormais, dans une perspective d’élevage de précision, de manière récurrente. Or, les systèmes de pesée précis sont onéreux et contraignants. Cette étude vise à concevoir un portique de pesée 3D utilisable en élevage porcin sur tous types d’animaux (de 10 à 110 kg) permettant de lever, au moins en partie, ces contraintes. Un portique équipé de 5 caméras Kinect de type TOF a été construit afin de mesurer le volume des porcs sans contention. Puis, sur la base de la mesure de densité réalisée avec un tomographe RX sur 48 animaux allant de 10 à 110 kg, il a été possible de déterminer la masse volumique d’un animal selon son âge et de corriger les imprécisions dans la détermination du volume par le portique. Au final, il est possible avec ce dispositif de portique 3D de déterminer le poids d’animaux de 10, 30, 70 et 110 kg avec une incertitude inférieure à 5% (respectivement de 4 %, 3 %, 2 % et 3 %) ce qui ouvre de nouvelles perspectives aux éleveurs de porcs pour piloter leur élevage de manière plus fine.

Source : https://www6.inrae.fr/ciag/content/download/6911/49975/file/Vol82-22-Rousseliere%20et%20al.pdf

Pour savoir plus, voir un lien vidéo : https://www.youtube.com/watch?v=Lsm6iMLtcQY

ENG

Development of a 3D imaging weighing process in pig breeding

Information on the animal weight is essential to improve breeding performances, at least occasionally but also, with precision breeding management, more regularly. However, precise weighing systems are expensive and restrictive. This study aims to design a 3D weighing portal that can be used in pig farming on all types of animals (from 10 to 110 kg) and able to overcome, at least in part, these constraints. A portal equipped with 5 TOF-type Kinect cameras was built to measure pig volume without restraint. Then, with density measurement carried out with an X-ray tomograph on 48 animals from 10 to 110 kg, it was possible to determine the animal density according to its age and to correct the inaccuracies in the determination of the volume by the portal. In the end, it is possible with this 3D portal to determine the animal weight of 10, 30, 70 and 110 kg with an uncertainty of less than 5% (respectively 4%, 3%, 2% and 3%) which offers new perspectives for pig farmers to better manage their breeding in the future.

Source : https://www6.inrae.fr/ciag/content/download/6911/49975/file/Vol82-22-Rousseliere%20et%20al.pdf

2021

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

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Ghylène Goudet (Inrae) et al., Animal, 2021, volume 15, n° 2, février, 10 pages

Optimal management of gilt reproduction requires oestrus synchronization. Hormonal treatments are used for this purpose, but there is a growing demand for non-hormonal alternatives, especially in organic farms. The boar effect is an important alternative opportunity to induce and synchronize oestrus without hormones. Before puberty, gilts exhibit a ‘waiting period’ during which boar exposure could induce and synchronize the first ovulation. We searched for salivary biomarkers of this period of boar effect receptivity to improve detection of the gilts to stimulate with the perspective of enhancing the efficacy of the boar effect. Saliva samples were collected from 30 Large-White×Landrace crossbred gilts between 140 and 175 days of age. Gilts were exposed twice a day to a boar 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 the first introduction of the boar and were considered receptive to the boar effect, 14 were detected in oestrus more than 8 days after first boar contact, and six did not show oestrus and were considered non-receptive. Saliva samples from six receptive and six non-receptive gilts were analyzed for steroidome and for metabolome using gas chromatography coupled to tandem mass spectrometry and 1 H nuclear magnetic resonance spectroscopy, respectively. Four saliva samples per gilt were analyzed: 25 days and 11 days before boar introduction, the day of boar introduction, 3 days later for receptive gilts or 7 days later for non-receptive gilts. Twenty-nine steroids and 31 metabolites were detected in gilt saliva. Salivary concentrations of six steroids and three metabolites were significantly different between receptive and non-receptive gilts: progesterone and glycolate 25 days before boar introduction, 3α5β20α- and 3β5α20β-hexahydroprogesterone, dehydroepiandrosterone, androstenediol, succinate, and butyrate 11 days before boar introduction, and 3β5αtetrahydroprogesterone on the day of boar introduction. Thus, nine potential salivary biomarkers of boar effect receptivity were identified in our experimental conditions. Further studies with higher numbers of gilts and salivary sampling points are necessary to ascertain their reliability.

source : https://reader.elsevier.com/reader/sd/pii/S1751731120300975?token=5E271F6FA56966AC3506CE667F532D4B6F75A568615574534CB7E99715E49A3716D8671C03D44E4E76B3F89EFB600176

https://www.inrae.fr/actualites/biomarqueurs-periode-receptivite-leffet-male-salive-jeunes-truies

2021

Reprendre un élevage : Porsim permet maintenant d'analyser son projet en ligne

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Alexia Aubry, Porc Mag (FRA), 2021, n° 559, février, p. 46

L'outil Porsim développé par l'Ifip propose de nouvelles applications en ligne pour évaluer sur les plans économiques et financier les projets en élevage porcin. Disponible uniquement sur le web, il permet maintenant de gérer la reprise d'un élevage avec son cheptel.

2021

La méthode RHAPORC : apprécier les facteurs qui modulent la relation homme-animal pour l’améliorer

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En élevage, la relation entre l’éleveur et ses animaux est un élément important de la durabilité : en effet, elle influence la production, mais aussi les conditions de travail, le plaisir de travailler, la qualité de vie, la santé et la sécurité des éleveurs. Elle constitue également un élément clé de l’acceptabilité sociale de l’élevage, car elle caractérise en partie l’éthique professionnelle des éleveurs. Enfin, elle participe au bien-être des animaux lors des interactions et des manipulations et elle est un des indicateurs de ce bien-être animal. Ce livret rassemble plusieurs parties.

PDF icon Document complet Rhaporc
2021

Guide du formateur pour l’utilisation de la mallette pédagogique Rhaporc

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Dans le cadre du projet RHAPorc (Relation Homme-Animal en élevage porcin), une mallette pédagogique a été construite afin d’aider les enseignants à aborder cette thématique. Une mallette pédagogique est un ensemble d’outils pédagogiques qui peuvent être utilisés de manière différente par le formateur en fonction des publics. Différents supports sont utilisés pour la création de ces outils pédagogiques : vidéos, diaporama, activité, témoignages, quizz, etc.

PDF icon Guide du formateur Rhaporc
2021

No Cast : un projet de sélection sur les odeurs en lignée femelle

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Bruno Ligonesche (Nucléus) et Marie-José Mercat (Ifip), Porc Mag (FRA), 2021, n° 560, mars, p.17

Les investigations en matière de lutte contre les odeurs de mâles entiers de carcasses se poursuivent du côté des lignées femelles. Trois organisations de sélection porcine travaillent aujourd'hui en collaboration avec l'Ifip et l'Inrae. Leur collaboration vise à réduire le risque de carcasses olfactives sans détériorer les performances de reproduction des femelles.

2021

Determination of nitroso-compounds in food products

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Aline Bonifacie (Ifip/Inrae) et al., Methods X, 2021, volume 8, mars, 6 pages

Nitrite and nitrate are present in many foods. Nitrate can be converted into nitrite in human body. Nitrite can react with secondary amines to form secondary amines and with thiols to form nitrosothiols. Some nitrosamines are cancers suspect. Because of their importance in terms of human health, research on these compounds is still topical and the use of a rapid and reproducible method for determination and quantification of these compounds is necessary. This article presents a method to study the chemical reactivity of nitrite in meat products through the analysis of non-volatile nitrosamines and nitrosothiols based on: • A specific alkaline and heat extraction of nitro-compounds followed by deprotenization by ultrafiltration • NO detection by the Griess reaction • NO released from S-NO and N-NO bonds by UV light followed by a specific cleavage of S-NO bonds with HgCl2 This method, validated on cured meat products, could be developed in the same way on all products containing nitrite and nitrate and leading to the formation of nitroso-compounds. The limit of detection for these compounds are of the order of the micromole per liter.

Source : https://www.sciencedirect.com/science/article/pii/S2215016121000820/pdfft?md5=364266625d8fb9e858c244791b3cc4de&pid=1-s2.0-S2215016121000820-main.pdf
2021

Genetics of digestive efficiency in growing pigs fed a conventional or a high‐fibre diet

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Vanille Déru (Inrae) et al., Journal of Animal Breeding and Genetics, volume 138, n° 2, mars, p. 246-258

The use of diets with increased dietary fibre content (HF) from alternative feedstuffs is a solution to limit the impact of increased feed costs on pig production. This study aimed at determining the impact of an alternative HF diet on pig digestibility and at estimating genetic parameters of this trait. Digestibility coefficients (DC) of energy, organic matter and nitrogen were predicted from faecal samples analysed with near infrared spectrometry for 1,242 samples, and it represented 654 Large White pigs fed a conventional (CO) diet and 588 fed a HF diet. Growth and feed efficiency traits, carcass composition and meat quality traits were recorded. Pigs fed the HF diet had significantly lower DC than pigs fed the CO diet (−4.5 to 6.0 points). The DC were moderately to highly heritable (about 0.26 ± 0.12 and 0.54 ± 0.15 in the CO and the HF diet, respectively). Genetic correlations were favourable with feed conversion ratio, daily feed intake and residual feed intake, but unfavourable with average daily gain (ADG) and carcass yield (CY). To conclude, DC could be an interesting trait to include in future breeding objectives if pigs were fed diet with HF diets, but adverse genetic trends with ADG and CY would have to be taken into account.

source : https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7891433/pdf/JBG-138-246.pdf

2021

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