Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Integrated risk assessment of changing animal production systems in the Netherlands
Post, P.J. ; Hogerwerf, Lenny ; Bokkers, E.A.M. ; Posthuma, Leo ; Boer, I.J.M. de; Lebret, E. - \ 2017
Considerable momentum is building to change existing practices in the Dutch livestock sector. With approximately 14 goats, 123 cows, 374 pigs, 3196 chickens, and 501 humans per km2, animal production, residential areas and natural areas compete for space. Evidence of substantial impacts on human health and ecosystem integrity are mounting, suggesting non-sustainable developments. Programs to foster sustainability run for some years but recently the Dutch government was advised to increase the pace. The evidence of impacts are, however, scattered over different domains, and the existence of (policy) ‘silos’ prevent an integrated solution to current impacts. This study aims to provide a first attempt to describe the current impacts of the Dutch livestock sector, including infectious diseases spread and emerging zoonosis risks, carbon and nitrogen emissions, particulate matter and endotoxin emissions, antimicrobial resistance and odors. We consider this first overview as a baseline for comparison with future scenarios for changing animal production systems.
Invited Review : Measurable biomarkers linked to meat quality from different pig production systems
Pas, Marinus F.W. Te; Lebret, Bénédicte ; Oksbjerg, Niels - \ 2017
Archiv fuer Tierzucht 60 (2017)3. - ISSN 0003-9438 - p. 271 - 283.

Biological processes underlie all livestock traits, including post-mortem meat quality traits. Biomarkers are molecular components of the biological processes showing differential expression associated with the phenotype of the trait. The phenotypes of the meat quality traits are determined by the animal's genotype interacting with the environment affecting the expression of the genome. The <q>omics</q> technologies enable measuring the expression of the genome at all levels: Transcriptome, proteome, and metabolome. Associations between the phenotype of the traits and expressions measured with the omics techniques are a first step in developing biomarkers. Biomarkers enable the monitoring, diagnosis, and prediction of changes in meat quality related to external (environmental, e.g. feed and animal management conditions) stimuli and interactions with the genotype. In this paper we review the development of biomarkers for meat quality of pigs in diverse pig breeds, environments, and pork production chains.

Data from: Experimental illumination of a forest: no effects of lights of different colours on the onset of the dawn chorus in songbirds
Silva, Arnaud Da; Jong, Maaike de; Grunsven, R.H.A. van; Visser, M.E. ; Kempenaers, Bart ; Spoelstra, K. - \ 2016
experimental night lighting - dawn singing - songbirds - LED - light colour
The data was collected in the field from 15 April to 15 May (from 27 April to 15 May for the Voorstonden location). The first column shows the 7 sites (from 1 to 7) used in the models as random effects. Site 1 corresponds to a location called ‘Lebret’s Hoeve’, site 2 to ‘Voorstonden’, site 3 to ‘Radio Kootwijk’, and site 7 to ‘Hijkerveld’. Sites 4 and 5 are adjacent spatially and correspond to a location called ‘ASK Doornspijk’. Finally, site 6 consists of two sites merged together because they overlap in a location called ‘Klaterweg’. The onsets (column 7) have therefore been obtained from the mean onsets in the two former sites for each light treatment on each day. The second column shows the 3 levels of 'Treatment', which represents the transects where the data has been collected (green, red, or white light transect). The third column shows the 'Formal date', i.e., the date at which the bird was singing (in calendar days). The fourth column shows the (relative) ‘date', which is the date relative to 15 April (0 = 15 April), and which has been used in the models as a random slope. The fifth column shows the 'onset relative to control'. This variable is calculated for each species, at each site and on each day, as the difference (in min) in the onset of dawn song between each light treatment (red/green/white) and the dark control. The sixth and last column shows the 'species' for which the onset is shown (14 levels, vernacular names shown).
Een gezond binnenmilieu in de toekomst
Passchier, W.F. ; Woudenberg, F. ; Berg, M. van den; Erisman, J.W. ; Hazel, P.J. van den; Lebret, E. ; Leemans, R. ; Sluijs, J.P. van der; Vliet, P.W. van - \ 2013
Den Haag : Gezondheidsraad (Publikatie / Gezondheidsraad 2013/17) - ISBN 9789055499526 - 44 p.
De invloed van stikstof op de gezondheid
Passchier, W.F. ; Berg, M. van den; Erisman, J.W. ; Hazel, P.J. van den; Lebret, E. ; Leemans, R. ; Sluijs, J.P. van der; Vliet, P.W. van - \ 2012
Den Haag : Gezondheidsraad (Horizon Scanning Report 2012-28) - ISBN 9789055499212 - 44
volksgezondheid - stikstof - intensieve landbouw - landbouw en milieu - milieu - public health - nitrogen - intensive farming - agriculture and environment - environment
Stikstof is noodzakelijk voor alle vormen van leven. Het is bijvoorbeeld een belangrijke bouwsteen van eiwitten. Planten, dieren en mensen nemen het op als reactief stikstof. Dat moet uit stikstof in de buitenlucht worden gevormd. In de natuur wordt reactief stikstof slechts op beperkte schaal gevormd, hoofdzakelijk door micro-organismen. De kunstmatige vorming van reactief stikstof werd een eeuw geleden mogelijk gemaakt door de uitvinding van een proces voor de synthese van ammoniak. Deze uitvinding legde de basis voor de fabricage van kunstmest. Daarmee werd een enorme toename van de voedselproductie per hectare grond mogelijk. Naast ammoniak vallen onder reactief stikstof nog vele stikstof bevattende verbindingen, waaronder ammonium- en nitraatzouten. Rijke werelddelen en landen, waaronder Europa, en zeker Nederland, hebben te maken met een teveel aan reactief stikstof in het milieu. Dit leidt tot aantasting van dit milieu en van de volksgezondheid. De overmaat aan reactief stikstof heeft twee belangrijke oorzaken: de landbouw en veehouderij, en de verbranding van fossiele brandstoffen. De Gezondheidsraad heeft zich over de mogelijke effecten van reactief stikstof op de Nederlandse volksgezondheid gebogen. Een commissie van de raad, de Commissie Signalering Gezondheid en milieu, heeft beoordeeld in hoeverre de volksgezondheid gebaat is bij het terugdringen van de hoeveelheid reactief stikstof in ons land.
Predicting meat quality with biomarkers - In the course of the EU QPorkChains project, biomarkers have been tested as a tool for monitoring meat traits
Pas, M.F.W. te; Lebret, B. ; Damon, M. ; Thomsen, B. ; Pierzchala, M. ; Korwin-Kossakowska, K. ; Li, L. ; Kristensen, L. ; Young, J.F. ; Pedersen, B. ; Oksbjerg, N. - \ 2012
Fleischwirtschaft International 27 (2012)4. - ISSN 0179-2415 - p. 18 - 22.
Nanomaterials in waste
Passchier, W. ; Berg, M. van den; Erisman, J.W. ; Hazel, P.J. van den; Lebret, E. ; Leemans, R. ; Sluijs, J.P. van der; Sips, A.J.A.M. ; Timmermans, D.R.M. ; Vliet, P.W. van - \ 2011
Den Haag : Health Council of the Netherlands (Horizon Scanning Report 2011/14 )
Influence of rearing conditions on performance, behavioral, and physiological responses of pigs to preslaughter handling, carcass traits, and meat quality
Lebret, B. ; Meunier-Salaün, M.C. ; Foury, A. ; Mormède, P. ; Dransfield, E. ; Dourmad, J.Y. - \ 2006
Journal of Animal Science 84 (2006)9. - ISSN 0021-8812 - p. 2436 - 2447.
growth-performance - physical-characteristics - liquid-chromatography - housing conditions - adipose-tissue - slaughter pigs - muscle traits - pork quality - floor space - stress
A total of 120 crossbred [synthetic line x (Large White x Landrace)] pigs (castrated males and females) were used to evaluate the influence of rearing conditions for growing-finishing pigs on growth performance, carcass, stress reactions at slaughter, and meat eating quality. At approximately 35 kg of live weight (LW), littermates were allocated to either a conventional (fully slatted floor, 0.65 m2/pig, considered as control, CON) or an alternative (sawdust bedding with free access to an outdoor area, 2.4 m2/pig, OUT) system, until slaughter at approximately 110 kg of LW. Pigs had free access to standard growing and finishing diets. The trials were conducted in spring, summer, and winter, with each season involving 2 pens of 10 pigs in each system. Compared with the CON, the OUT pigs exhibited a greater growth rate (+10%, P <0.001) due to their greater feed intake (+0.23 kg/d, P <0.01), resulting in a greater body weight at slaughter (+7 kg, P <0.001). The OUT pigs had thicker backfat (+2.4 mm, P <0.01) and lower lean meat content (¿ 2.0% points, P <0.001) than the CON pigs. The OUT system did not (P > 0.10) influence the behavioral activities of pigs during lairage at the slaughterhouse, or the urinary levels of catecholamines and cortisol, and plasma levels of ACTH, cortisol, lactate, creatine kinase, and FFA immediately after slaughter. The OUT pigs had similar (P > 0.10) pH values 30 min postmortem (pH1) in the LM, biceps femoris (BF), and semimembranosus (SM) muscles, similar ultimate pH (pHu) in LM, but lower pHu in SM (¿ 0.07 unit, P <0.001) and in BF (¿ 0.03 unit, P = 0.029). Despite nonsignificant effects of production system on stress reactions at slaughter, assessed by urine and plasma indicators and muscle metabolism at 30 min postmortem, meat from OUT pigs had more LM drip loss after 2 (+1.0%, P = 0.003) and 4 (+1.1%, P = 0.010) d than did meat from the CON pigs. The OUT system slightly increased meat yellowness (b* value) in the LM (+0.7 unit, P = 0.001), BF (+0.5 unit, P = 0.014), and SM (+0.5, unit P = 0.041), whereas redness (a*) and lightness (L*) of the 3 muscles were unaffected (P > 0.07). Intramuscular fat content was greater in the LM (+17%, P = 0.001), BF (+14%, P = 0.004), and SM (+17%, P = 0.003) of the OUT pigs. Outdoor rearing during summer and winter improved meat juiciness, whereas odor, flavor, and tenderness were unaffected (P > 0.10). Influence of rearing conditions on all the other traits studied did not depend on the season.
Field Comparison of two NO2 passive samplers to assess spatial variation
Reeuwijk, H. van; Fisher, P.H. ; Harssema, H. ; Briggs, D.J. ; Lebret, E. - \ 1998
Environmental Monitoring and Assessment 50 (1998). - ISSN 0167-6369 - p. 37 - 51.
Respiratoire symptomen bij kinderen in relatie tot luchtverontreiniging door verkeer.
Marra, M. ; Fischer, P.H. ; Lebret, E. ; Brunekreef, B. ; Wijnen, J.H. van - \ 1997
Tijdschrift voor sociale geneeskunde 75 (1997)middenkatern. - ISSN 0040-7607 - p. 42 - 43.
Chronic respiratory symptoms in children and adults living along streets with high traffic density.
Oosterlee, A. ; Drijver, M. ; Lebret, E. ; Brunekreef, B. - \ 1996
Occupational and Environmental Medicine 53 (1996). - ISSN 1351-0711 - p. 241 - 247.
Research project on the relationship between air quality and health in six central and eastern european countries.
Lebret, E. ; Houthuijs, D. ; Fletcher, T. ; Elliott, P. ; Brunekreef, B. - \ 1995
Epidemiology 6 (1995). - ISSN 1044-3983 - p. S18 - S18.
Performance of NO2 passive samplers in ambient air in dense networks.
Reeuwijk, H. van; Lebret, E. ; Fischer, P.H. ; Smallbone, K. ; Celko, M. ; Harssema, H. - \ 1995
Epidemiology 6 (1995)4 suppl.. - ISSN 1044-3983 - p. S60 - S60.
Ambient SO2 measured by passive samplers in Poland and the Czech Republic.
Reeuwijk, H. van; Harssema, H. ; Gorynkski, P. ; Szaniecki, J. ; Celko, M. ; Fischer, P.H. ; Lebret, E. - \ 1995
Epidemiology 6 (1995)4 suppl.. - ISSN 1044-3983 - p. S60 - S60.
Deeltjesvormige luchtverontreiniging.
Clarenburg, L.A. ; Blom, A.P.M. ; Bogaard, C.J.M. van den; Brunekreef, B. ; Ham, J. van; Kolk, J.J. ; Lebret, E. ; Pieters, J.J.L. ; Quanjer, P. ; Rombout, P.J.A. - \ 1995
Unknown Publisher - 38 p.
Small area variations in air quality and health (SAVIAH) in the Netherlands.
Fischer, P.H. ; Lebret, E. ; Reeuwijk, H. van; Ameling, C.B. ; Doornbos, G. ; Veen, A.A. van der; Wijnen, J.H. van; Harssema, H. - \ 1995
Epidemiology 6 (1995)4 suppl.. - ISSN 1044-3983 - p. S60 - S60.
Acute effects of ambient ozone on pulmonary function of children in The Netherlands.
Hoek, G. ; Fischer, P. ; Brunekreef, B. ; Lebret, E. ; Hofschreuder, P. ; Mennen, M. - \ 1993
American review of respiratory disease 147 (1993). - ISSN 0003-0805 - p. 111 - 117.
Dagelijkse luchtwegklachten bij basisschoolkinderen in relatie tot kenmerken van de binnenluchtkwaliteit.
Zee, S. van der; Fischer, P. ; Hoek, G. ; Brunekreef, B. ; Lebret, E. - \ 1992
Tijdschrift voor sociale gezondheidszorg 70 (1992). - ISSN 0920-0517 - p. S22 - S22.
The association between home dampness, environmental tobacco smoke and presence of unvented water heaters with acute respiratory symptoms in schoolchildren.
Fischer, P. ; Zee, S. van der; Hoek, G. ; Brunekreef, B. ; Lebret, E. - \ 1992
American review of respiratory disease 145 (1992). - ISSN 0003-0805 - p. A532 - A532.
Time series analyses of the relationship between ambient air pollution episodes and prevalence of children's acute respiratory symptoms in The Netherlands.
Hoek, G. ; Brunekreef, B. ; Lebret, E. - \ 1991
In: Abstract WHO, IAE, Basel - p. 043 - 043.
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