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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The fish egg microbiome : diversity and activity against the oomycete pathogen Saprolegnia
Liu, Y. - \ 2016
Wageningen University. Promotor(en): Francine Govers; Jos Raaijmakers, co-promotor(en): Irene de Bruijn. - Wageningen : Wageningen University - ISBN 9789462577671 - 169
salmon - fish eggs - marine microorganisms - microbial diversity - bioinformatics - genomics - saprolegnia - oomycota - fish diseases - suppression - fungal antagonists - zalm - visseneieren - mariene micro-organismen - microbiële diversiteit - bio-informatica - genomica - saprolegnia - oömycota - visziekten - onderdrukking - schimmelantagonisten

Y. Liu

Prof. dr. F. Govers (promotor); Prof. dr. J.M. Raaijmakers (promotor); Dr. I. de Bruijn (co-promotor); Wageningen University, 13 June 2016, 170 pp.

The fish egg microbiome: diversity and activity against the oomycete pathogen Saprolegnia

Emerging oomycete pathogens increasingly threaten biodiversity and food security. This thesis describes the study of the microbiome of Atlantic salmon (Salmo salar L.) eggs and analyses of the effects of infections by the oomycete pathogen Saprolegnia on the microbial architecture. A low incidence of Saprolegniosis was correlated with a relatively high abundance and richness of specific commensal Actinobacteria. Among the bacterial community, the isolates Frondihabitans sp. 762G35 (Microbacteriaceae) and Pseudomonas sp. H6 significantly inhibited hyphal attachment of Saprolegnia diclina to live salmon eggs. Chemical profiling showed that these two isolates produce furancarboxylic acid-derived metabolites and a lipopeptide viscosin-like biosurfactant, respectively, which inhibited hyphal growth of S. diclina in vitro. Among the fungal community, the fungal isolates obtained from salmon eggs were closely related to Microdochium lycopodinum/Microdochium phragmitis and Trichoderma viride. Both a quantitative and qualitative difference in the Trichoderma population between Saprolegnia-infected and healthy salmon eggs was observed, which suggested that mycoparasitic Trichoderma species could play a role in Saprolegnia suppression in aquaculture. This research provides a scientific framework for studying the diversity and dynamics of microbial communities to mitigate emerging diseases. The Frondihabitans, Pseudomonas and Trichoderma isolates, and/or their bioactive metabolites, are proposed as effective candidates to control Saprolegniosis.

The influence of a water current on the larval deposition pattern of females of a diverging fire salamander population (Salamandra salamandra)
Krause, E.T. ; Caspers, B.A. - \ 2015
Salamandra : German Journal of Herpetology 51 (2015)2. - ISSN 0036-3375 - p. 156 - 160.
microsatellite loci - genetic-distance - habitat - adaptation - amphibia - success - salmon - home
Fire salamanders are amphibians that exhibit a highly specific reproductive mode termed ovo-viviparity. The eggs develop inside their mothers, and the females give birth to fully developed larvae. The larvae in our study area cluster in two distinct genetic groups that can be linked directly to the habitat (stream or pond) in which the larvae were deposited. Apart from the genetic differences, larvae belonging to the two different habitat types differ in morphological traits, indicating that female fire salamanders already show some type of ecological adaptation to the different habitats. In this study, we investigated whether pregnant fire salamander females of the two habitat-specific genotypes (stream and pond) specifically prefer to deposit larvae in flowing water bodies with a continuous current (i.e., simulating stream habitats) or in water bodies without a permanent water current (i.e., simulating pond habitats). We assumed that the presence of a current is used by the females as a cue to deposit their larvae in the matching aquatic habitat (flowing/standing) according to their own habitat-specific genotype. However, the female fire salamanders of the two habitat-specific genotypes did not show a preference for depositing their larvae in the water body with a water current matching their genotype cluster (stream/pond). Furthermore, the larval genotype did not match the water type in which the larvae were deposited. Overall, this study aimed to test whether fire salamander females of two different habitat-linked genotypes use a water current as a criterion for choosing an aquatic habitat for larval deposition. Our data do not support this hypothesis, leading to the assumption that fire salamander females use other environmental cues to select a water body for larval deposition.
Social sustainability of cod and haddock fisheries in the northeast Atlantic: what issues are important?
Veldhuizen, L.J.L. ; Berentsen, P. ; Bokkers, E.A.M. ; Boer, I.J.M. de - \ 2015
Journal of Cleaner Production 94 (2015). - ISSN 0959-6526 - p. 76 - 85.
life-cycle assessment - environmental impacts - production systems - fish - categories - indicators - products - welfare - stress - salmon
Research on the sustainability of capture fisheries has focused more on environmental and economic sustainability than on social sustainability. To assess social sustainability, first relevant and important social sustainability issues need to be identified. The objective of this study was to identify relevant social sustainability issues for cod and haddock fisheries in the northeast Atlantic and to determine the importance of these issues based on stakeholder input. A heterogeneous group of stakeholders was invited to take part in two consecutive surveys on social sustainability issues. The first survey (n=41) resulted in a long list of 27 relevant social sustainability issues, including six issues that were not identified in previous studies and that address aspects of fish welfare, employees' training and education opportunities, and employees' time off from work. The second survey (n=51) resulted in a ranking of the social sustainability issues in order of importance. The most important issues are worker safety, product freshness and companies' salary levels. In general, social sustainability issues concerning working conditions, employees' job fulfilment and fish welfare are seen as more important than other social sustainability issues. A main discussion point concerns the relation between the importance of a social sustainability issue on the one hand and the type of need that the issue relates to and the state of the issue on the other hand. From the study it can be concluded that the relative importance of social sustainability issues differs per stakeholder group depending on the relation between the stakeholder group and each particular issue. This demonstrates the importance of consulting different stakeholder groups in future studies on social sustainability in order to get a balanced view on the importance of social sustainability issues. Results on the relevance and importance of social sustainability issues for cod and haddock fisheries in the northeast Atlantic enable the fishing industry and policy-makers to direct improvement efforts towards the more important issues. ©
Salmon tracing: Genotyping to trace back escapees from salmon aquaculture
Blonk, R.J.W. - \ 2014
Yerseke : IMARES (Report / IMARES Wageningen UR C029/14) - 15
zalm - zalmteelt - aquacultuur - genetische merkers - genotyping - salmon - salmon culture - aquaculture - genetic markers
The overall objective of the project is to assign an escaped salmon back to the farm responsible for the escape with near 100% accuracy. In this report, the potential of a set of genetic markers to assign an escaped salmon was determined for a set of 12 polymorphic microsatellite markers, provided by Nofima, and by using stochastic simulation. Also, the effect of different numbers of sires, and the effect of pooling of multiple sires in crosses was determined.
A comparison of microsatellites and SNPs in parental assignment in the GIFT strain of Nile tilapia (Oreochromis niloticus): The power of exclusion
Trong, T.Q. ; Bers, N.E.M. van; Crooijmans, R.P.M.A. ; Dibbits, B.W. ; Komen, J. - \ 2013
Aquaculture 388-391 (2013). - ISSN 0044-8486 - p. 14 - 23.
genotyping errors - computer-program - empirical-evaluation - natural-populations - markers - wild - inference - paternity - sibship - salmon
In this study, parental assignment was studied in the 10th generation of a pedigreed selected Nile tilapia (Oreochromis niloticus) population (GIFT) and their offspring, by comparing two types of molecular markers, microsatellites and SNPs, using an exclusion-based (Vitassign) and a likelihood-based (Cervus) method. For the experiment, G10 parents were divided in 4 groups (cohorts) and allowed to produce offspring by natural group mating. In total 173 offspring were tested against 238 parents, using either 12 microsatellites (PIC = 0.639; exclusion power 68.0%) or 122 SNPs (PIC = 0.341; exclusion power 99.9%). In this study, more than half of the candidate parents were either full- or half-sibs with other parents. Furthermore, 13.8% of the parents died before being sampled for DNA. When offspring were assigned to parents in the same cohort, using Vitassign, for microsatellites, allowing up to 2 mismatches, 37.6% offspring got unique assignments, 45.1% got multiple assignments, and 17.3% were not assigned; for SNPs with up to 15 mismatches allowed, 83.8% offspring got unique assignments while 13.9% got multiple assignments. Only 2.3% were not assigned. Using Cervus, for microsatellites, the mean ‘strict’ (> 95% CF) assignment rate across the 4 cohorts was 18%, the ‘relax’ (80–95% CF) assignment rate was 43%, and 39% were not assigned; for SNPs, 39% ‘strict’ assignments were obtained (mean across 4 cohorts); the remaining offspring were not assigned. In general assignment rates were higher when cohort offspring were assigned to all parents combined, irrespective of method (Vitassign or Cervus) or marker used. However, consistency of assignments between microsatellites and SNPs was low: 28% with Vitassign and 16% with Cervus. Consistency of assignments between Cervus and Vitassign was high with SNPs (65%), but was low with microsatellites (31%). We conclude that missing parents and relatedness among candidate parents resulted in low assignment rates. Furthermore, low exclusion power of the microsatellite set resulted in low assignment rates and multiple parent pair assignments irrespective of method used. Exclusion methods and likelihood-based methods can be equally good for parental assignments, providing that good marker sets with high exclusion power are available.
Genetisch gemanipuleerde zalm stap dichter bij supermarktschap
Heijden, P.G.M. van der - \ 2013
Aquacultuur 28 (2013)1. - ISSN 1382-2764 - p. 6 - 7.
zalm - kweekvis - visteelt - genetische modificatie - genetisch gemanipuleerde organismen - volksgezondheid - salmon - farmed fish - fish culture - genetic engineering - genetically engineered organisms - public health
In augustus 2010 oordeelde de Amerikaanse Food and Drug Administration (FDA) dat zij in de genetisch gemodificeerde (GM) zalm van het berdijf Aquabounty geen gevaren voor de menselijke gezondheid zag. Vlak voor Kerstmis 2012 werd een voorlopig rapport openbaar gemaakt waarin de toets van de zalm van Aquabounty op mogelijke milieueffecten werd beschreven. het rapport omschreef deze effecten als verwaarloosbaar. Nu de GM zalm ook deze toets met succes lijkt te gaan doorstaan, is de afstand tot kweek en verkoop in de winkel weer een stuk kleiner geworden.
Evaluation of Electrical Stunning of Atlantic Cod (Gadus morhua) and Turbot (Psetta maxima) in Seawater
Lambooij, E. ; Digre, H. ; Erikson, U. ; Reimert, H.G.M. ; Burggraaf, D. ; Vis, J.W. van de - \ 2013
Journal of Aquatic Food Product Technology 22 (2013)4. - ISSN 1049-8850 - p. 371 - 379.
catfish clarias-gariepinus - fresh-water - slaughter - salmon - consciousness - behavior - quality - l.
The aim of this study was to assess electrical stunning of Atlantic cod and turbot in seawater to develop a protocol for the process of stunning and killing. An induced general epileptiform insult (unconscious) had a duration of 40 ± 27 s (n =14) in cod (2.6 ± 0.5 kg) and 34 ± 18 s (n = 19) in turbot (520 ± 65 g). Seven cod and 3 turbot displayed a physical reaction, and 11 turbot registered an electroencephalogram (EEG) response to pain stimuli administered 30 s post-stun. The heart rate was 32 ± 6 beats/min in cod and 25 ± 7 beats/min in turbot prior to stunning. Post-stunning, the electrocardiogram (ECG) revealed fibrillation and reduced activity post-stun. EEG, ECG recordings, and behavioral observations indicate that when a bipolar square wave current was applied with a frequency of 133 Hz and 43% duty cycle side to side (turbot) and at 170 Hz and 33% duty cycle (cod) head to tail, both species were stunned in seawater at current densities of 3.2 A/dm2 and 2.5 A/dm2, respectively. For turbot, a 5 s exposure to electricity followed by chilling in ice water for 15 min is sufficient to prevent recovery. For cod, a killing method needs to be established.
Smolts van Roer naar Rotterdam : passage van jonge zalmen langs de ECI waterkrachtcentrale in Roermond
Roessink, I. ; Ottburg, F.G.W.A. - \ 2013
Wagenigen : Wageningen UR, Wetenschapswinkel (Alterra-rapport 2430) - ISBN 9789461731821 - 44
vismigratie - zalm - visziekten - schimmels - saprolegnia parasitica - monitoring - tellingen - energiecentrales - waterkracht - maas - midden-limburg - fish migration - salmon - fish diseases - fungi - censuses - power industry - water power - river meuse
Al jarenlang zetten vrijwilligers van VBC Roerdal en Arbeitsgemeinschaft Lachs und Meerforelle 2020 (ArGe Lachs) zich in voor de herintroductie van zalm op de rivier de Roer. Hierbij worden jonge zalmen uit ei opgekweekt en uitgezet in de bovenloop van de Roer. De vrijwilligers hebben echter tot nu toe geen zicht op de daadwerkelijke aantallen smolts (jonge zalmen) die, vanaf deze bovenstroomse delen, naar de Maas en daarmee uiteindelijk naar zee trekken. De smolts kunnen dit namelijk op vier manieren doen, via de smoltval, de aalpijp (aalfuik), de vispassage van de ECI waterkrachtcentrale of via de vispassage van de Hambeek. Verder worden er tijdens, delen van, de migratieperiode met schimmel geïnfecteerde jonge zalmen aangetroffen en is het niet duidelijk waardoor dit veroorzaakt wordt. In de Roer worden ook nog de nodige exotische rivierkreeften en wolhandkrabben gevangen, die mogelijk een bron van infecties zijn. In deze studie werden twee onderzoeksvragen beantwoord, ten eerste of de schimmels die op sommige smolts werden waargenomen wellicht door de toenemende aanwezigheid van exotische kreeften en krabben veroorzaakt kon worden en ten tweede welk deel van het totale aantal passerende smolts in de smoltval van de ECI centrale gemonitord werden tijdens hun trek naar zee.
Uitbraak Salmonella in zalm (interview met o.a. M.H. Zwietering)
Zwietering, Marcel - \ 2012
food safety - food contamination - salmonella - salmon - inspection
Proficiency test for paracitides in salmon muscle
Elbers, I.J.W. - \ 2012
Wageningen : RIKILT Wageningen UR (Report / RIKILT 2012.018) - 54
zalm - spieren - antiparasitica - voedselveiligheid - analytische methoden - laboratoriumproeven - salmon - muscles - antiparasitic agents - food safety - analytical methods - laboratory tests
The aim of this proficiency study was to give laboratories the possibility to evaluate or demonstrate their competence for the analysis of parasiticides in salmon muscle. This study also provided an evaluation of the methods applied for the quantitative analysis of parasiticides in salmon muscle.
Modeling the economic impact of welfare interventions in fish farming - a case study from the U.K. rainbow trout industry
Kankainen, M. ; Berrill, I.K. ; Noble, C. ; Kole, A.P.W. - \ 2012
Aquaculture Economics & Management 16 (2012)4. - ISSN 1365-7305 - p. 315 - 340.
animal-welfare - performance - survival - growth - salmon
Actions that aim to improve animal welfare are likely to involve costs for the producer, although at the same time such actions may improve the profitability of production. In this article we introduce a quantitative bio-economical approach for estimating the economic consequences for improving animal welfare in the aquaculture industry; for farmers and the industry as a whole. The decision tool can be used with different welfare indicators, different species and production systems. It can be used to rank the economic consequences of different techniques that aim to improve welfare. We illustrate the decision tool with a case study relating to the use of triploids in rainbow trout farming. We highlight the probability how the benefits gained from changes in bio-economical productivity factors, and consumers’ willingness to pay can overcome the costs associated with implementing a specific welfare intervention.
Color encoded microbeads-based flow cytometric immunoassay for polycyclic aromatic hydrocarbons in food
Meimaridou, A. ; Haasnoot, W. ; Noteboom, L. ; Mintzas, D. ; Pulkrabova, J. ; Hajslová, J. ; Nielen, M.W.F. - \ 2010
Analytica Chimica Acta 672 (2010)1-2. - ISSN 0003-2670 - p. 9 - 14.
monoclonal-antibody - pahs - milk - combustion - particles - exposure - luminex - samples - salmon - pyrene
Food contamination caused by chemical hazards such as persistent organic pollutants (POPs) is a worldwide public health concern and requires continuous monitoring. The chromatography-based analysis methods for POPs are accurate and quite sensitive but they are time-consuming, laborious and expensive. Thus, there is a need for validated simplified screening tools, which are inexpensive, rapid, have automation potential and can detect multiple POPs simultaneously. In this study we developed a flow cytometry-based immunoassay (FCIA) using a color-encoded microbeads technology to detect benzo[a]pyrene (BaP) and other polycyclic aromatic hydrocarbons (PAHs) in buffer and food extracts as a starting point for the future development of rapid multiplex assays including other POPs in food, such as polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers (PBDEs). A highly sensitive assay for BaP was obtained with an IC50 of 0.3 µg L-1 using a monoclonal antibody (Mab22F12) against BaP, similar to the IC50 of a previously described enzyme-linked immunosorbent assay (ELISA) using the same Mab. Moreover, the FCIA was 8 times more sensitive for BaP compared to a surface plasmon resonance (SPR)-based biosensor immunoassay (BIA) using the same reagents. The selectivity of the FCIAs was tested, with two Mabs against BaP for 25 other PAHs, including two hydroxyl PAH metabolites. Apart from BaP, the FCIAs can detect PAHs such as indenol[1,2,3-cd]pyrene (IP), benz[a]anthracene (BaA), and chrysene (CHR) which are also appointed by the European Food Safety Authority (EFSA) as suitable indicators of PAH contamination in food. The FCIAs results were in agreement with those obtained with gas chromatography–mass spectrometry (GC–MS) for the detection of PAHs in real food samples of smoked carp and wheat flour and has great potential for the future routine application of this assay in a simplex or multiplex format in combination with simplified extraction procedure which are under development.
Deelproject 1: Nader identificeren van indicatoren, databronnen en problemen en mogelijkheden van integratie in ERDSS Technisch rapport
Schelvis-Smit, A.A.M. - \ 2010
IJmuiden : IMARES (Rapport / IMARES Wageningen UR C124/10) - 39
voedselveiligheid - zalm - risicoschatting - risicovermindering - risicofactoren - deskundigen - beleidsondersteuning - food safety - salmon - risk assessment - risk reduction - risk factors - experts - policy support
In het beleidsondersteunend project BO “Emerging Risk in de Nederlandes Voedselketen”is een prototype voor een systeem ontwikkeld voor het vroegtijdig identificeren van voedselveiligheidsrisico’s (Emerging Risk Detection Support System (ERDSS)). Dit systeem is ontwikkeld voor de zalmproductieketen en combineert expertkennis en informatie uit openbare databronnen om voedselveiligheidsrisico’s te identificeren.
Experimental evidence for the biological species status in Lake Tana’s Labeobarbus flock (Cyprinidae)
Graaf, M. de; Nagelkerke, L.A.J. ; Palstra, A.P. ; Sibbing, F.A. - \ 2010
Animal Biology 60 (2010)2. - ISSN 1570-7555 - p. 183 - 193.
barbus-intermedius complex - reproductive segregation - ecological divergence - sympatric speciation - cichlid fishes - ethiopia - evolution - africa - origin - salmon
Lake Tana (Ethiopia) harbours the only known remaining intact species flock of large (max. 100 cm standard length, SL) cyprinid fishes (15 Labeobarbus spp.). In 'common garden' experiments progeny of the riverine spawning benthivorous L. tsanensis, and of the piscivorous L. truttiformis and L. megastoma was raised under similar environmental conditions to test if interspecific morphological differentiation would occur. Interspecific morphological differences and divergence were clearly observed early in ontogeny (= 40 mm SL). This study is the first to demonstrate direct proof for the genetic basis of morphological differentiation among these labeobarbs, providing further support that Lake Tana's labeobarb species are true biological species
Freedom Food : op de bres voor het welzijn van landbouwhuisdieren in het Verenigd Koninkrijk
Waller, B. ; Heijden, P.G.M. van der - \ 2009
Aquacultuur 24 (2009)1. - ISSN 1382-2764 - p. 32 - 33.
aquacultuur - dierhouderij - dierenwelzijn - viskwekerijen - visserij - visteelt - zalm - dierenbescherming - aquaculture - animal husbandry - animal welfare - fish farms - fisheries - fish culture - salmon - animal protection
Op 11 december 2008 gaf Bob Waller tijdens de NGVA thema-avond een presentatie met als titel "Fork naar Farm; Maatschappelijke visies op aquacultuur". Freedom Food is een organisatie die tot doel heeft het welzijnprogramma van het Royal Society for the Prevention of Cruelty to Animals - (RSPCA), de Britse Dierenbescherming voor landbouwhuisdieren vorm te geven
Effects of age and stocking density on the welfare of African catfish, Clarias gariepinus Burchell
Nieuwegiessen, P.G. van de; Olwo, J. ; Khong, S. ; Verreth, J.A.J. ; Schrama, J.W. - \ 2009
Aquaculture 288 (2009)1-2. - ISSN 0044-8486 - p. 69 - 75.
rainbow-trout - cortisol - survival - behavior - growth - confinement - juveniles - salmon - light - water
Information on the effects of stocking density, especially on later life stages of the African catfish (Clarias gariepinus), is lacking. Therefore, the purpose of this study was to assess the influence of density on the welfare of juvenile African catfish in a growth stage of 100–1500 g. Furthermore, the changing impact of stocking density on welfare indicators at different stages throughout the growth cycle (from 10–1500 g) of African catfish is discussed. In Phase 2a, 15 groups of African catfish (102.1 ± 3.49 g) were assigned to one of five final densities (67, 133, 267, 533, and 1067 fish/m3). In Phase 2b, 12 groups of African catfish (1044.6 ± 31.6 g) were assigned to one of four final densities (67, 155, 244, and 333 fish/m3). Welfare was studied by recording both growth, physiological and behavioural parameters. A combination of univariate and multivariate analysis was applied in order to acquire an integrated and objective reflection of the effects of stocking density on a range of welfare indicators. Within the size and density ranges used, welfare was not impacted negatively by increasing density. In Phase 2a, fish welfare improved with increasing density while in Phase 2b no effects of stocking density were found. These results also show that the effects of stocking density are not uniform throughout the growth cycle. These differences need to be taken into account by husbandry practices to assure that high welfare standards are maintained throughout the life cycle of the fish being cultured.
Emerging Risks in the Dutch Food Chain report on project 2: Application of indicator analyses on several critical points in the salmon production chain and identification of related data sources
Schelvis-Smit, A.A.M. ; Poelman, M. ; Schneider, O. - \ 2008
Yerseke : IMARES (Report / Wageningen IMARES C071/08) - 17
voedselveiligheid - zalm - risicoschatting - risicovermindering - risicofactoren - indicatoren - food safety - salmon - risk assessment - risk reduction - risk factors - indicators
An indicator analysis was performed on the fish production chain by assessing the indicators which may be of importance for the detection of emerging risks. The indicators were embedded in a “risk pathway”, in which the relations between different indicators could be illustrated. The risk pathways illustrate the main characteristics of the salmon production chain. However further research is required in order to develop further interaction with other sectors, and production chains to bring emerging risk detection to the next level. In relation to the assigned indicators, a selection of (electronic) data sources were identified in order to be able to combine data flows with indicators and risk pathways. The indicators were analyzed for availability, sources of data entry, validation of data sources, update frequency and delay in input. The combination of risk pathways, indicators and data sources, will be one of the key information sources for the further development of an Emerging Risk Detection Support System (ERDSS).
Ontwikkeling van een emerging risks identificatie systeem : (resultaten 2006 en vervolgactiviteiten in 2007)
Roest, J.G. van der; Marvin, H.J.P. - \ 2008
Wageningen : RIKILT, Instituut voor Voedselveiligheid (Rapport / RIKILT, Instituut voor Voedselveiligheid 2008.105) - 13
voedselveiligheid - risicoschatting - risicofactoren - visverwerkende industrie - visverwerking - zalm - food safety - risk assessment - risk factors - fish industry - fish processing - salmon
Het beleid (Ministerie van LNV) heeft de wens geuit om vroegtijdig nieuwe problemen van voedselveiligheid te kunnen signaleren. Het huidige (4-jarige) Emerging Risks-onderzoek binnen het BO-programma maakt daar onderdeel van uit. In het jaar 2006 is een verdieping verricht naar indicatoren die van belang zijn voor identificatie van potentiële nieuwe en onvoorziene risico’s waarbij de visproductieketen en in het bijzonder de zalmproductieketen als voorbeeld is genomen. Daarnaast is tijdens een mini-conferentie de mening gepeild van en kennis uitgewisseld met experts over early warning systems afkomstig uit Nederland (RIKILT, VWA, RIVM, LEI, AFSG en TNO) en uit het buitenland (DEFRA (UK), EFSA (Italië), ECDC (Zweden) en FAO (Italië). Hierbij is ook gediscussieerd over de rol van de stakeholders en hun percepties met betrekking tot emerging risks. Dit rapport geeft een overzicht van de resultaten van het onderzoek uit 2006 en geeft daarnaast inzicht in de vervolgactiviteiten die in 2007 zijn uitgevoerd
Bijvangsten van salmoniden en overige trekvissen vanuit een populatieperspectief
Jansen, H.M. ; Winter, H.V. ; Tulp, I.Y.M. ; Bult, T.P. ; Hal, R. van; Bosveld, J. ; Vonk, R. - \ 2008
IJmuiden : IMARES (Rapport / Wageningen IMARES C039/08) - 175
zalm - salmonidae - visserij - populatie-aanwas - herstel - belemmeringen - bijvangst - salmon - fisheries - recruitment - rehabilitation - disincentives - bycatch
De huidige studie gaat in op de vraag of de huidige visserijinspanning door bijvangsten het herstel van de zalmpopulatie in de weg staat. De voorliggende rapportage geeft een overzicht van een inventarisatie van bijvangsten van salmoniden en overige trekvissen in zowel de commerciële als de recreatieve visserij in de Nederlandse wateren. Visserijsterfte en overige sterftefactoren worden vervolgens afgezet tegen een populatieschatting waardoor de relatieve impact van visserij in perspectief geplaatst kan worden.
Options for pro-actively identifying emerging risk in the fish production chain
Roest, J.G. van der; Kleter, G.A. ; Marvin, H.J.P. ; Vos, B.I. de; Hurkens, R.R.C.M. ; Schelvis-Smit, A.A.M. ; Booij, K. - \ 2007
Wageningen : Rikilt - Institute of Food Safety (Report / RIKILT, Institute of Food Safety 2007.006) - 87
zalm - zalmteelt - risicoschatting - voedselveiligheid - voer - ketenmanagement - salmon - salmon culture - risk assessment - food safety - feeds - supply chain management
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