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Visible and near infrared spectroscopy for PSE-like zones classification at different post mortem times

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The ability of visible and near infrared spectroscopy (VIS-NIRS) to predict PSE-like zone classification was examined on 150 deboned hams at 5 post mortem times (12, 16, 20, 24 and 36 h pm). Four probes were used to investigate the accuracy. Two of our probes were prototypes. Partial Least Squares Discriminant Analysis (PLSDA) was used to determine the prediction models from spectrums recorded on semimembranosus muscle. Surface probes gave better results than inserted probes. The best probe showed moreover a good accuracy whatever the pm times was when measuring (78 to 86 % good prediction in external validation as the 24 h pm model was used). Its false negative/false positive ratios were favorable at the early pm times (12 to 20 h pm). So an early PSE-like zones prediction is possible using VIS-NIRS.

The prototype probe inserted showed good results (82,9% good prediction in external validation) and would deserve additional validation on bone-in hams, as industrials need.

PDF icon lhommeau_2015icomst.pdf
2015

Visible and near infrared spectroscopy for PSE-like zones classification at different post mortem times

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Poster.

The defect of PSE-like zones is a major cause of slicing losses in the French “jambon supérieur” cooked ham process. VIS-NIR spectroscopy is now known as a reference method for meat composition assessments and for predicting the meat quality parameters such as ultimate pH, color, texture, or drip loss. The aim of this study was to investigate the NIRS ability to predict PSE-like class of deboned hams at different post mortem times. The use of new probes was planned in order to improve the prediction models.

PDF icon lhommeau2015icomst-poster.pdf
2015

Visible spectroscopy and redox potential as alternatives of ultimate pH for cooking yield prediction (spectroscopie visible et potentiel redox : des alternatives au pH ultime pour la prédiction du rendement à la cuisson)

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The opportunity to use redox potential and visible spectroscopy for cooking yield prediction was investigated in processed meat. Whereas the relationship between ultimate pH (pHu) and cooking yield is well documented, the redox potential may help to understand the meat quality response in processed meat. Visible spectroscopy was tested as a more reliable alternative to pHu. Two experiments were run on cooked cured hams (SM) and loins (LD).

PDF icon Visible spectroscopy and redox potential as alternatives of ultimate pH for cooking yield prediction<br /><br /><br />(spectroscopie visible et potentiel redox : des alternatives au pH ultime pour la prédiction du rendement à la cuisson)
2011

Vision method tested to predict the lean meat percentage of a pig carcass in relation to the reference dissection method

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PDF icon Vision method tested to predict the lean meat percentage of a pig carcass in relation to the reference dissection method
2003

Vision numérique : un outil pour évaluer qualité de la viande de poulet en ligne

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La filière volaille bénéficie de la bonne image de marque de ses produits et plus particulièrement de ceux à base de poulet pour leurs caractéristiques diététiques. Elle est au coeur du processus de mutation qui amène les filières alimentaires à devenir celles du prêt-à-manger. Le consommateur privilégie les produits pratiques, prêts à l’emploi. Il privilégie les produits préparés, au détriment de la viande fraîche. Les produits élaborés représentaient début 2003, 1/5 de la consommation de viande de volaille. Ils pourraient en représenter près de la moitié en 2010.

PDF icon Vision numérique : un outil pour évaluer qualité de la viande de poulet en ligne
2004

Vision versus reflectance technology for deviations for sex and halothane genotype in pig carcass classification

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Gérard Daumas et al. 63e International Congress of Meat Science and Technology, Cork, Irlande, 13-18 août 2017, p. 50-51

This work aims to compare the systematic deviations for sex and halothane genotype subpopulations between pig classification methods by automatic vision and semi-automatic relfectance. A sample of 209 carcasses, stratified according to sex (50% castrated males and 50% females), was measured by CSB Image-Meater® (IM) and CGM. An car sample was analysed for halothane gene (Hal). The left sides were cut according to the EU procedure and the four main cuts were weighed and scanned by X-ray tomography in order to detemrine lean meat percentage (LMP). For each device the LMP was regressed on the fat and muscle depths included in the official equations. For each equation were calculated the systematic deviations per level of the sex and Hal factors by mean difference between predicted and observed values. The LMP overestimation for castrated males increased from 0.4% with CGM to 0.7% with IM. The LMP overestimation for non-sensitive homosygotes Hal, not significant with CGM, rose to 0.5%. Systematic deviations for sexual types could be cancelled at least by a differentiated offset in the prediction equation.

PDF icon Gérard Daumas et al. 63e ICOMST, Cork, Irlande, 13-18 août 2017, p. 50-51
2017

Vision versus reflectance technology for deviations for sex and halothane genotypes in pig carcass classification

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Gérard Dumas et Mathieu Monziols, 63e International Congress of Meat Science and Technology, Cork, Irlande, 13-18 août 2017, poster

Automation of pig carcass classification entailed a change in the location of the measured variables. Since mid-2013 in France the thicknesses measured on the back, laterally to the splitline, were replaced by thicknesses measured at the ham-loin junction on the splitline. Systematic deviations by sub-population, whose knowledge is of great interest in the chain, have thus been modified. The objective of this work was to quantify the systematic deviations related to sex and halothane genotype factors for CGM and CSB Image-Meater® classification methods, well known for their effects on carcass composition.

PDF icon Gérard Dumas et Mathieu Monziols, 63e ICOMST, Irlande, 13-18 août 2017, pos
2017

Vision versus reflectance technology to estimate pork cuts composition

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Gérard Dumas et Mathieu Monziols, 63e International Congress of Meat Science and Technology, Cork, Irlande, 13-18 août 2017, poster

Sorting meat cuts is an ongoing challenge. Many pork plants use weighing and carcass grading information for pre-sorting. Automation of pig carcass classification entailed a change in the location of the measured variables. Since mid-2013 in France the thicknesses measured by reflectance (CGM) on the back, laterally to the splitline, were replaced by thicknesses measured by vision (CSB Image-Meater®) at the ham-loin junction on the splitline. The objective of this work was to compare the precision of these two classification methods to predict the proportion of muscle in the main cuts.

PDF icon Gérard Dumas et Mathieu Monziols, 63e ICOMST, Cork, Irlande, 13-18 août 2017
2017

Vision versus reflectance technology to estimate pork cuts composition

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Gérard Daumas et Mathieu Monziols, 63e International Congress of Meat Science and Technology, Cork, Irlande, 13-18 août 2017, p. 115-116

The objective of this article is to compare the precision of two carcass classification methods to assess the lean meat percentage (LM%) of the major pork cuts. One method is automatic by vision (CSB Image-Meater®, IM) and the other is semi-automatic by reflectance (CGM). A sample of 241 carcasses, comprising 50% of females and 50% of castrated males, was measured by both methods. The left sides were cut according to the EU procedure and the four main cuts were weighed and scanned by X-Ray tomography. Each LM% was regressed on the one hand on the two CGM thicknesses and, on the other hand, on the four IM thicknesses. The thickness M4 of IM was not significant. The hierarchy of the cuts has been preserved in therms of increasing residual standard deviation (RSD): ham, shoulder, loin and belly. The RSDrose about 15% for the limbs and 30-35% for the trunk. The help of carcass classification for directing cutting should turn out to be weakened.

PDF icon Gérard Daumas et Mathieu Monziols, 63e ICOMST, Cork, Irlande, 13-18 août 2017
2017

Vitalité des porcelets issus de l'hyperprolificité

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Cet article propose une synthèse des résultats acquis ces dernières années, notamment à la station expérimentale de Romillé.

L’arrivée des lignées hyperprolifiques s’est accompagnée d’une remise en question des programmes alimentaires en place dans les élevages, notamment pendant la gestation. Cela concerne à la fois les plans d’alimentation, l’individualisation des rations et les types de nutriments apportés à la truie gestante.
PDF icon tp4quiniou10.pdf
2010
Vitamines : rôles et besoins dans l’alimentation du porc

Vitamines : rôles et besoins dans l’alimentation du porc

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• Pour chaque vitamine : état des connaissances et des pratiques.

• Pour l’utilisateur : repères simples sur les besoins des animaux.



Édition 2005 - Une pochette et 14 fiches 16 X 24

Document réservé Espace Pro, veuillez vous identifier
2005

Vitesse de sédimentation de la matière sèche, de l’azote, du phosphore et du potassium des lisiers de porcs

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Poster. La réalisation d’un échantillon de lisier de porc peut poser des difficultés de représentativité compte tenu de sa composition hétérogène. Avant la phase de prélèvement, les éleveurs de porcs brassent le plus souvent leur fosse de stockage. Dans ce cas, l’échantillonnage s’effectue généralement sur la fraction surnageante, parfois un certain temps après l’arrêt du brassage ce qui pourrait entraîner une sous-estimation de leur valeur fertilisante.
PDF icon Vitesse de sédimentation de la matière sèche, de l’azote, du phosphore et du potassium des lisiers de porcs
2009

Volet «Calculateur de la quantité et de la composition des effluents d’élevage »

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visuel d'intervention.

PDF icon 2013levasseur-rmt.pdf
2013

Voluntary feed intake and feeding behaviour of group-housed growing pigs are affected by ambient temperature and body weight

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The effect of ambient temperature on individual feeding behaviour was studied in six groups of Piétrain×Large White barrows. In experiment 1 (two groups), ambient temperature varied in a cyclic way from 22 to 12°C and 12 to 22°C with three or four consecutive days at each of the following temperatures: 22, 19, 16, 14 or 12°C. Similarly, in experiment 2 (two groups), temperature varied from 19 to 29°C and 29 to 19°C with three or four consecutive days at 19, 22, 25, 27 or 29°C. In both experiments, each group was used over two successive cycles with an initial body weight (BW) of 37 kg at cycle 1 (four pigs per group) and 63 kg at cycle 2 (three pigs per group). During experiment 3, groups of four pigs were exposed to varying temperatures over one cycle either as in experiment 1 (one group) or as in experiment 2 (one group); their initial BW was 45 kg. Photoperiod was fixed to 12 h of light. In experiments 1 and 2, neither the daily number of meals (11) nor the rate of feed intake (37 g/min) were affected by temperature. The daily number of meals was lower at cycle 2 (9 vs. 12 at cycle 1 on average) but their size was higher (305 vs. 181 g/meal at cycle 1). The feeding pattern was mainly diurnal (62%). From individual data obtained at each temperature level and each stage of growth in this study (N=296), an equation to predict the voluntary feed intake (VFI) from temperature (T, ranging between 12 and 29°C) and body weight (BW, ranging between 30 and 90 kg) is proposed: VFI (g/d)=−1264+117T−2.40T2+73.6BW−0.26BW2−0.95T×BW (RSD=329). The present relationship indicates that VFI depends on temperature and body weight with a marked negative effect of high ambient temperatures in heavier pigs.

2000

Voyage d'étude ITP et LGPC au Danemark

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Les Livres Généalogiques Porcins Collectifs et l’Institut Technique du Porc ont organisé, en décembre dernier, un voyage d’étude au Danemark auquel ont participé différents représentants des Organisations de Sélection Porcine et des ingénieurs de l’ITP. Ce groupe de dix personnes, férues de génétique porcine, ont pu ainsi avoir en l’espace de quelques jours un aperçu de l’organisation de l’amélioration génétique porcine au Danemark. Les similitudes entre les dispositifs collectifs français et danois de sélection porcine ont conduit à de tels échanges à plusieurs reprises depuis 1990.
PDF icon Voyage d'étude ITP et LGPC au Danemark
1999

Voyage d'étude ITP-LGPC : dix spécialistes découvrent la génétique danoise

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1999

Vrai ou faux porcelets mort-nés : une nouvelle méthode rapide d’évaluation par échographie

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Poster.

FR

Avec 20% de pertes sur nés totaux en moyenne (IFIP-GTTT, 2015), la mortalité excessive des porcelets en maternité reste une préoccupation majeure, tant pour des raisons économiques que sociétales. Les mort-nés représentent en moyenne 36% des pertes, mais cette proportion varie selon les troupeaux et peut être sur- ou sous-estimée de façon importante (Schneider et al., 2002). Or la détermination précise du stade et des causes de mortalité sont essentielles pour identifier les axes de progrès propres à chaque élevage (Robert, 2009). Il s’agit de différencier les mortalités en cours de gestation (momifiés précoces ou tardifs), pendant (« vrais mort-nés ») et après la mise bas (nés vivants ou « faux mort-nés »). Ceci repose sur trois examens rarement réalisés en élevage : des observations externes détaillées, une autopsie et un test de flottaison du poumon. L’étude réalisée a pour objectif d’évaluer l’intérêt d’une méthode alternative rapide basée sur l’échographie du poumon. Afin de préciser les conditions pratiques de sa mise en oeuvre, différents types d’équipements et de conservation des porcelets avant examen sont testés.

ENG

True or false stillborn piglets: a new and rapid ultrasonographic method of evaluation

High rate of pre-weaning mortality (20% of total born) is an important economic and ethical issue in pig farms. Contribution of stillborn piglets is high (36% of total mortality) but variable. This may be attributed to some inaccurate on-farm evaluations, as precise diagnosis requires necropsy (lung flotation test). The aim of this study was to evaluate the accuracy of an alternative on-farm ultrasonographic diagnosis. Measurements were implemented in the IFIP experimental farm on piglets found dead at birth or within 24 h of life (mummies excluded). Thoracic echography was performed with a 5 MHz linear probe before lung flotation test (n = 256 piglets). The same procedures were implemented on different sub-samples of piglets, using a sectorial pregnancy probe (n = 214), after prolonged conservation (4-6 days at 4°C, n = 25) or on frozen-thawed piglets (n = 51). In ‘false stillborn’, ventilation was associated with typical reverberation artifacts, while non-ventilated lungs of ‘true stillborn’ appeared like homogenous hepatized organs. Characterization with the linear probe was in excellent agreement with the flotation test (98 to 100% accuracy) both on fresh and preserved piglets. The sectorial probe was less efficient (time consuming, lower accuracy). Due to its simplicity and moderate cost, this new and rapid method may be of great practical interest both for research and on-farm investigations.

PDF icon Boulot et al., 48es JRP, 2-3 février 2016, Paris, p. 253-254, poster
2016

Vrai ou faux porcelets mort-nés : une nouvelle méthode rapide d’évaluation par échographie

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Poster.

La mortalité élevée des porcelets (>20% de pertes sur nés totaux) reste une préoccupation majeure, en particulier dans les grandes portées.
• Les mort-nés ont une forte contribution (36% des pertes totales), mais la qualité d’enregistrement est variable selon les élevages.
• La détermination précise des mort-nés (autopsies et test de fl ottaison du poumon) est coûteuse et prends du temps.

-> Les « vrais » et « faux » mort-nés peuvent-ils être déterminés plus rapidement par échographie ?

-> Le matériel et la conservation des porcelets permettent-ils des examens en élevage ?

PDF icon poster ifip de Sylviane Boulot et al., 48es JRP, 2-3 février 2016, Paris
2016

Water medication with a dosing pump : motivations, obstacles and use practices

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Poster.

The reliability of water medication with a dosing pump requires appropriate equipment and good use practices. This study aims to assess the situation in 2014 in terms of motivations and use practices of the dosing pump in a sample of equipped farms. It also aims to understand the obstacles in nonequipped farms.

Abstract.

Introduction: While antimicrobial treatments administered via the feed were largely predominant in France 15 years ago, drinking water is becoming the main administration route, as 51% of treatments are found as oral solutions and powders in 2013 against 22% in 1999. Mostly administered by dosing pump, the reliability of these treatments requires adapted material and correct use practices. This study has for objective to describe the motivation and use practices of the dosing pump in a sample of equipped farms in 2014. It also aims to understand the obstacles for non-equipped farms.

Materials and Methods: A phone survey was conducted in a sample of 109 French farms equipped with a dosing pump and 46 farms which were non-equipped.

Results: One of the main reasons cited by 46% of farmers for acquiring a dosing pump is the higher efficiency and the shorter implementation of treatment administered through water over feed. Regarding the use practices, the best applied recommendations are the preparation of the tank solution for a use up to 24 hours (91% of farms) and the complete water rinsing of the circuit at the end of the treatment (90% of farms). In 26% of farms, calculation of the amounts of water drunk by pigs under treatment is relied on the animals’ real level of water consumption based on the reading of the water meter or the graduations on the tank. Other farmers (40%) give an estimate of water drunk from theoretical values (10% of the live weight of animals to treat), which is more approximate because based on a constant set for healthy pigs. And 30% of farmers did not explain how they do the calculation for they work “from habit”. Other recommendations are seldom followed by the surveyed farmers whereas they can prevent treatment under-dosing and clogging of troughs and pipes. Indeed, throughout the past year, the trough flow was never controlled in 53% of farms. Occasional solubilisation problems of the treatment, which occurred in 41% of farms, can be explained by some risky practices: the absence of a mixing tank in 31% of farms, no solubility test for new drugs with water from the farm in 59% of cases, mixing of two drugs in 18 % of farms. Finally, improvements are expected in equipment maintenance which is implemented in less than 25% of farms. For 43% of non-equipped farmers, the main obstacle is the constraint related to equipment: cost, set up, use. Only 11% of non-equipped farmers plan to purchase a dosing pump in the short-term.

Conclusion: This survey helps to better target communication routes to optimise the reliability of treatments administered by a dosing pump, as well as to assist the non-equipped farmers through the acquiring process. 

PDF icon Poster IFIP de Anne Hémonic, 24th International pig veterinary society congress, 7-10 juin 2016, Dublin (Irlande)
2016

Weaning management associated with reproductive performances in French pig farms

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Though multi-factorial determinants of reproductive performances are well established, few studies investigated weaning management at farm levels (1, 2), with more frequent focus on insemination and semen (3).

The aim of this study was to make an inventory of the different weaning practices in farms and to investigate possible relationships with fertility and litter size.

PDF icon boulot-p.669-2014.pdf
2014

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