Papers by Elisabeth BAEZA
Production de canards
HAL (Le Centre pour la Communication Scientifique Directe), 2012
Rationaliser l'usage des médicaments en élevage : avant-propos
INRAE Productions Animales
Le recours important aux antiinfectieux en médecine humaine et vétérinaire a favorisé le développ... more Le recours important aux antiinfectieux en médecine humaine et vétérinaire a favorisé le développement de la résistance des agents infectieux notamment aux antibiotiques. Afin de réduire ce problème, depuis une dizaine d’années, les politiques publiques en France et en Europe ont mis en place des plans de contrôle et de réduction de l’usage des antibiotiques. En élevage, ces plans ont été efficaces puisque les volumes d’antibiotiques utilisés ont fortement diminué. Ils ont aussi permis de raisonner plus globalement le recours aux médicaments en élevage, de renforcer les mesures de prévention (biosécurité, vaccination), de modifier des pratiques d’élevage en concertation avec les éleveurs et les vétérinaires praticiens au sein des différentes filières et de développer des produits alternatifs aux antiinfectieux (extraits de plantes, huiles essentielles, acides organiques, prébiotiques, probiotiques…). Ce numéro spécial de la revue INRAE Productions Animales regroupe des articles qui ...
Dietary fat sources modulate the protective effect of vitamin E on lipid and protein oxidation in microsomal membranes from turkey muscles
HAL (Le Centre pour la Communication Scientifique Directe), Aug 30, 1998
Review: Implication of redox imbalance in animal health and performance at critical periods, insights from different farm species
animal
Insulin-like growth factor-I (IGF-I) and sexual dimorphism of growth in chickens
British Poultry Science, 2001
Investigation of volatolome of body fluids and tissues by SPME-GC-MS to back-trace food chain exposure to micropollutants
HAL (Le Centre pour la Communication Scientifique Directe), 2016
Use of volatile compounds in liver and plasma as markers of animal exposure to micropollutants
International audienc
Food Control, 2019
This study assessed the transfer of fumonisins B1 and B2 (FBs), zearalenone (ZEA) and zearalenone... more This study assessed the transfer of fumonisins B1 and B2 (FBs), zearalenone (ZEA) and zearalenone metabolites α-zearalanol (α-ZAL) and α-zearalenol (α-ZEL) to poultry tissues. Two experimental groups of 9 male chickens each were exposed for 8 weeks to a contaminated diet (FB group: 12.7 mg FB1 + FB2 kg -1 , ZEA group: 0.40 mg ZEA kg -1 ). To measure the carry-over from feed to animal tissues (liver and muscle), a sensitive and accurate SIDA-UHPLC-MS/MS method was developed and validated. For all mycotoxins, the limit of detection (LOD) was 0.3 µg kg -1 and the limit of quantification (LOQ) was 1.0 µg kg -1 . Recoveries ranged from 92% to 107% and the intermediate precision coefficients of variation (CV IP ) were between 4.3% and 13%. ZEA and α-ZAL were not detected in livers, whereas α-ZEL was detected in five out of eight samples at levels between LOD and LOQ. FBs were detected and quantified in the livers of all animals exposed to the contaminated diet (mean 30.3 µg FB1 kg -1 and 2.3 µg FB2 kg -1 ). A significant correlation between the FB1 and the FB2 contents in the liver was demonstrated and FB carry-over factors (CFs) from feed to liver were determined (CF FB1 : 0.003 and CF FB2 : 0.001). Filet muscles from the same animals were also analysed. FB1 was quantified at trace levels in eight samples out of nine (mean 2.0 µg kg -1 ) and was only detected in the remaining sample. FB2 was detected in only one muscle sample.
Comparison of common components analysis with principal components analysis and independent components analysis: Application to SPME-GC-MS volatolomic signatures
Talanta, 2018
The aim of this work is to compare a novel exploratory chemometrics method, Common Components Ana... more The aim of this work is to compare a novel exploratory chemometrics method, Common Components Analysis (CCA), with Principal Components Analysis (PCA) and Independent Components Analysis (ICA). CCA consists in adapting the multi-block statistical method known as Common Components and Specific Weights Analysis (CCSWA or ComDim) by applying it to a single data matrix, with one variable per block. As an application, the three methods were applied to SPME-GC-MS volatolomic signatures of livers in an attempt to reveal volatile organic compounds (VOCs) markers of chicken exposure to different types of micropollutants. An application of CCA to the initial SPME-GC-MS data revealed a drift in the sample Scores along CC2, as a function of injection order, probably resulting from time-related evolution in the instrument. This drift was eliminated by orthogonalization of the data set with respect to CC2, and the resulting data are used as the orthogonalized data input into each of the three methods. Since the first step in CCA is to norm-scale all the variables, preliminary data scaling has no effect on the results, so that CCA was applied only to orthogonalized SPME-GC-MS data, while, PCA and ICA were applied to the "orthogonalized", "orthogonalized and Pareto-scaled", and "orthogonalized and autoscaled" data. The comparison showed that PCA results were highly dependent on the scaling of variables, contrary to ICA where the data scaling did not have a strong influence. Nevertheless, for both PCA and ICA the clearest separations of exposed groups were obtained after autoscaling of variables. The main part of this work was to compare the CCA results using the orthogonalized data with those obtained with PCA and ICA applied to orthogonalized and autoscaled variables. The clearest separations of exposed chicken groups were obtained by CCA. CCA Loadings also clearly identified the variables contributing most to the Common Components giving separations. The PCA Loadings did not highlight the most influencing variables for each separation, whereas the ICA Loadings highlighted the same variables as did CCA. This study shows the potential of CCA for the extraction of pertinent information from a data matrix, using a procedure based on an original optimisation criterion, to produce results that are complementary, and in some cases may be superior, to those of PCA and ICA.
Combining genetics and genomics for understanding and reducing the variability of poultry meat quality
HAL (Le Centre pour la Communication Scientifique Directe), Sep 4, 2011
Augmentation de l'âge à l'abattage d'une souche lourde de poulet et conséquences sur le rendement et la qualité de la viande
HAL (Le Centre pour la Communication Scientifique Directe), Mar 29, 2011
National audienc
Analysis of an alternative slow-growing chicken line reveals a large genetic variability of carcass and meat quality related traits
National audienc
Improving meat quality by regulating animal feeding and genetics : recent advances in poultry
HAL (Le Centre pour la Communication Scientifique Directe), May 28, 2009
The maternal stress effects of an omega 3 enriched diet in chickens
HAL (Le Centre pour la Communication Scientifique Directe), Sep 14, 2015
International audienceThe n-3 and n-6 fatty acid (FA) content of the maternal diet during the pre... more International audienceThe n-3 and n-6 fatty acid (FA) content of the maternal diet during the prenatal period influences brain and behavioural development in mammalian offspring. Although, maternal effects on offspring behaviour are well characterised in birds, maternal dietary effects of n-3 and n-6 FA still deserve consideration. This study examined effects of maternal diet with high levels of n-3 or standard n-3/n-6 FA levels (i.e. control (C)) on the FA composition and hormone concentrations in yolk, maternal basal faecal corticosterone metabolites (FCM), and offspring’s development and behavioural responses to novelty (novel food, novel object and novel environment), in white leghorn laying hens (n=18/group, offspring, n=48/n-3 vs n=50/C). The n-3 enriched diet increased yolk progesterone (1,145±151 vs 669±95 ng/g, P=0.02) and estradiol concentrations (10.5±0.5 vs 7.4±0.3 ng/g, P=0.002), and n-3 FA content in yolk while reducing essential arachidonic acid compared to control diet (0.6±0.05 vs 1.8±0.2% of total FA, P<0.01). The hens fed the n-3 FA enriched diet had higher FCM levels than hens fed control diet (397.5±56.8 vs 98.7±19.1 ng/g, P=0.003). Chicks obtained from hens fed the n-3 enriched diet (n-3 chicks) weighted less at hatch than chicks obtained from hens fed the C diet (C chicks): 39.4±3.4 vs 40.8±3.3 g (P=0.02). N-3 chicks spent less time eating novel foods, especially females (12±4 vs 23±5 s, P=0.01,), and took longer to approach a novel object (173.9±6 vs 144.6±11.56 s, P=0.01). In a novel environment, n-3 chicks walked less than C chicks (6.0±1.7 vs 11.4±2.3 line crosses, P=0.02). These data suggest a stress effect of the maternal n-3 enriched diet, by increasing steroid yolk-hormones levels and FCM. They highlight a potential trans-generational detrimental impact of n-3 enriched maternal diet on offspring emotional reactivity – a potential new pathway for maternal effects in birds via the n3/n6 ratio in the maternal diet
Effect of lipid content on oxidation susceptibility of duck meat
European Poultry Science (EPS), 2018
International audienceLipid content in duck meat can show a very large variation. It influences t... more International audienceLipid content in duck meat can show a very large variation. It influences the nutritional and sensory attributes of the meat and perhaps it influences meat susceptibility to oxidation during cold storage of fresh or processed meat. By combining the duck genotype (Muscovy duck, Pekin duck and mule) and the nutritional level (ad libitum or overfed) we were able to obtain duck fillets exhibiting a large variation in lipid content and to distribute them into 3 classes (2.0 to 3.5%, 4.0 to 5.5% and 5.9 to 7.9% fat). Storage at + 4 degrees C or -20 degrees C of raw meat or at + 4 degrees C of dry-cured fillets did neither affect the colour and fatty acid composition of the meat nor its susceptibility to lipid or protein oxidation
Spectroscopie dans le proche infrarouge et prédiction de la teneur en lipides du filet de poulet
National audienc
Effet des acides gras polyinsaturés n-3 apportés au cours du développement embryonnaire et des périodes de démarrage et croissance sur le comportement de picage des canards de Barbarie
En elevage, les canards peuvent exprimer des comportements deleteres tels que le nervosisme et le... more En elevage, les canards peuvent exprimer des comportements deleteres tels que le nervosisme et le picage. De nombreux travaux conduits chez l’homme et des modeles rongeurs ont montre un effet positif des acides gras polyinsatures n-3 a longue chaine (AGPI n-3 LC) sur le developpement et le fonctionnement du cerveau. L’objectif de cet essai est de tester la possibilite de diminuer le comportement de picage du canard de Barbarie en elevage en apportant des AGPI n-3 LC au cours du developpement soit embryonnaire soit post-natal des canetons, en croisant ces deux facteurs. L’enrichissement des oeufs et donc des embryons en AGPI n-3 LC est realise en alimentant les canes avec un regime contenant les acides docosahexaenoique (DHA) et linolenique (microalgues et huile de lin). Un lot temoin de canes est alimente avec un regime contenant de l’acide linoleique (huile de soja). Apres eclosion, les aliments demarrage et croissance sont aussi soit enrichis avec du DHA et de l’acide linolenique,...
Influence of increased slaughter age on meat yield and breast meat quality from a heavy line of broiler [Conference poster]
National audienc
Technological variability of chicken breast meat quality encountered in France according to the production system
Effects of different dietary sources of n-3 fatty acids on the growth performance and technological, nutritional and sensorial quality of chicken meat
Uploads
Papers by Elisabeth BAEZA