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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    Population dynamics of Hippophae rhamnoides shrub in response of sea-level rise and insect outbreaks
    Decuyper, Mathieu ; Dool, Robbert van den; Slim, Pieter ; Kuiters, Loek ; Jansen, Jeroen ; Sass-Klaassen, Ute - \ 2020
    Better interpretable models after correcting for natural variation : Residual approaches examined
    Koeman, Mike ; Engel, Jasper ; Jansen, Jeroen ; Buydens, Lutgarde - \ 2018
    Chemometrics and Intelligent Laboratory Systems 174 (2018). - ISSN 0169-7439 - p. 142 - 148.
    Disease diagnosis - Interpretation - Metabolomics - PCA - Residuals - Smearing
    The interpretation of estimates of model parameters in terms of biological information is often just as important as the predictions of the model itself. In this study we consider the identification of metabolites in a possibly biologically heterogeneous case group that show abnormal patterns with respect to a set of (healthy) control observations. For this purpose, we filter normal (baseline) natural variation from the data by projection of the data on a control sample model: the residual approach. This step should more easily highlight the abnormal metabolites. Interpretation is, however, hindered by a problem we named the ‘residual bias’ effect, which may lead to the identification of the wrong metabolites as ‘abnormal’. This effect is related to the smearing effect. We propose to alleviate residual bias by considering a weighted average of the filtered and raw data. This way, a compromise is found between excluding irrelevant natural variation from the data and the amount of residual bias that occurs. We show for simulated and real-world examples that this compromise may outperform inspection of the raw or filtered data. The method holds promise in numerous applications such as disease diagnoses, personalized healthcare, and industrial process control.
    Comparison of PCBs and PAHs levels in European coastal waters using mussels from the Mytilus edulis complex as biomonitors
    Olenycz, M. ; Sokolowski, A. ; Niewinska, A. ; Wolowicz, M. ; Namiesnik, J. ; Hummel, H. ; Jansen, J.M. - \ 2015
    Oceanologia = Oceanology 57 (2015). - ISSN 0078-3234 - p. 196 - 211.
    polycyclic-aromatic-hydrocarbons - polychlorinated biphenyl congeners - chromatography mass-spectrometry - toxic equivalency factors - baltic sea - blue mussels - seasonal-variations - gas-chromatography - organic pollutants - marine-environment
    Mussels from the Mytilus edulis complex were used as biomonitors for two groups of organic pollutants: polychlorinated biphenyls (PCBs, congeners: 28, 52, 101, 118, 138, 153 and 180) and polycyclic aromatic hydrocarbons (PAHs, naphthalene, acenaphthylene, acenaphthene, fluorene, phenanthrene, anthracene, fluoranthene, pyrene, benz(a)anthracene, chrysene, benzo(b)fluoranthene, benzo(k)fluoranthene, benzo(a)pyrene, indeno(1,2,3-cd)pyrene, dibenz(a,h)anthracene, benzo(g,h,i)perylene) at 17 sampling sites to assess their relative bioavailabilities in coastal waters around Europe. Because of the temporal differences in PCBs and PAHs concentrations, data were adjusted using Seasonal Variation Coefficients (SVC) before making large-scale spatial comparisons. The highest concentrations of PCBs were found near estuaries of large rivers flowing through urban areas and industrial regions. Elevated bioavailabilities of PAHs occurred in the vicinity of large harbors, urban areas, and regions affected by petroleum pollution as well as in some remote locations, which indicated long-range atmospheric deposition.
    Large-Scale Spatial Dynamics of Intertidal Mussel (Mytilus edulis L.) Bed Coverage in the German and Dutch Wadden Sea
    Folmer, Eelke O. ; Drent, Jan ; Troost, Karin ; Büttger, Heike ; Dankers, Norbert ; Jansen, Jeroen ; Stralen, Marnix van; Millat, Gerald ; Herlyn, Marc ; Philippart, Catharina J.M. - \ 2014
    Ecosystems 17 (2014)3. - ISSN 1432-9840 - p. 550 - 566.
    Intertidal blue mussel beds are important for the functioning and community composition of coastal ecosystems. Modeling spatial dynamics of intertidal mussel beds is complicated because suitable habitat is spatially heterogeneously distributed and recruitment and loss are hard to predict. To get insight into the main determinants of dispersion, growth and loss of intertidal mussel beds, we analyzed spatial distributions and growth patterns in the German and Dutch Wadden Sea. We considered yearly distributions of adult intertidal mussel beds from 36 connected tidal basins between 1999 and 2010 and for the period 1968-1976. We found that in both periods the highest coverage of tidal flats by mussel beds occurs in the sheltered basins in the southern Wadden Sea. We used a stochastic growth model to investigate the effects of density dependence, winter temperature and storminess on changes in mussel bed coverage between 1999 and 2010. In contrast to expectation, we found no evidence that cold winters consistently induced events of synchronous population growth, nor did we find strong evidence for increased removal of adult mussel beds after stormy winter seasons. However, we did find synchronic growth within groups of proximate tidal basins and that synchrony between distant groups is mainly low or negative. Because the boundaries between synchronic groups are located near river mouths and in areas lacking suitable mussel bed habitat, we suggest that the metapopulation is under the control of larval dispersal conditions. Our study demonstrates the importance of moving from simple habitat suitability models to models that incorporate metapopulation processes to understand spatial dynamics of mussel beds. The spatio-dynamic structure revealed in this paper will be instrumental for that purpose.
    Ontwikkeling en stabiliteit van sublitorale mosselbanken, samenvattend eindrapport
    Smaal, A.C. ; Brinkman, A.G. ; Schellekens, T. ; Jansen, J.M. ; Agüera García, A. ; Stralen, M.R. van - \ 2014
    Yerseke : IMARES (Rapport / IMARES Wageningen UR C066/14) - 32
    mosselteelt - habitats - waddenzee - modellen - vis vangen - netten - mussel culture - habitats - wadden sea - models - fishing - nets
    Dit rapport is een verslag over onderzoek naar factoren die van belang zijn voor de stabiliteit van wilde sublitorale mosselbanken. Stabiliteit is gedefinieerd als de kans die eenmaal gevestigde wilde mosselbanken hebben om meerdere winters te overleven. In 2005 is op basis van ervaring een stabiliteitskaart opgesteld voor mosselbanken in de westelijke Waddenzee. Het habitatmodel is gericht op het verband tussen het voorkomen van (wilde) mosselen en de abiotische omstandigheden zoals zoutgehalte, diepte, stroming en slibgehalte van de bodem op de locaties waar mosselen werden aangetroffen. Een factor die moeilijk voorspelbaar is, maar die in de praktijk van groot belang kan zijn, is het wegspoelen van mosselen tijdens stormen.
    Species delimitation and DNA barcoding of Atlantic Ensis (Bivalvia, Pharidae)
    Vierna, J. ; Cuperus, J. ; Martinez-lage, A. ; Jansen, J.M. ; Perina, A. ; Pelt-Heerschap, H.M.L. van; Gonzalez-Tizon, A.M. - \ 2014
    Zoologica Scripta 43 (2014)2. - ISSN 0300-3256 - p. 161 - 171.
    pcr-rflp analysis - phylogenetic networks - maximum-likelihood - mollusca-bivalvia - 5s rdna - siliqua - directus - macha - population - taxonomy
    Ensis Schumacher, 1817 razor shells occur at both sides of the Atlantic and along the Pacific coasts of tropical west America, Peru, and Chile. Many of them are marketed in various regions. However, the absence of clear autapomorphies in the shell and the sympatric distributions of some species often prevent a correct identification of specimens. As a consequence, populations cannot be properly managed, and edible species are almost always mislabelled along the production chain. In this work, we studied whether the currently accepted Atlantic Ensis morphospecies are different evolutionary lineages, to clarify their taxonomic status and enable molecular identifications through DNA barcoding. For this, we studied 109 specimens sampled at 27 sites, which were identified as belonging to nine of those morphospecies. We analysed nucleotide variation at four nuclear (18S, 5.8S, ITS1, and ITS2) and two mitochondrial (COI and 16S) regions, although the 18S and 5.8S regions were not informative at the species level and were not further considered. The phylogenetic trees and networks obtained supported all morphospecies as separately evolving lineages. Phylogenetic trees recovered Ensis at each side of the Atlantic as reciprocally monophyletic. Remarkably, we confirm the co-occurrence of the morphologically similar E. minor (Chenu, 1843) and E. siliqua (Linné, 1758) along the NW Iberian coast, a fact that has been often overlooked. In South America, a relevant divergence between E. macha (Molina, 1792) individuals from Chile and Argentina was unveiled and suggests incipient speciation. We also confirm the occurrence of the North American species E. directus (Conrad, 1843) as far south as north-eastern Florida. Among the genomic regions analysed, we suggest COI as the most suitable DNA barcode for Atlantic Ensis. Our results will contribute to the conservation and management of Ensis populations and will enable reliable identifications of the edible species, even in the absence of the valves. The name Ensis coseli Vierna nom. nov. is proposed to replace E. minor Dall, 1899 non (Chenu, 1843).
    Perturbation induced changes in substrate use by the blue mussel, Mytilus edulis, in sedimentary systems
    Kangeri, A.K. ; Jansen, J.M. ; Barkman, B.R. ; Donker, J.J.A. ; Joppe, D.J. ; Dankers, N.M.J.A. - \ 2014
    Journal of Sea Research 85 (2014). - ISSN 1385-1101 - p. 233 - 240.
    attachment strength - thread production - wave exposure - dreissena-polymorpha - seasonal-variation - byssal attachment - rocky shores - soft-bottom - wadden sea - galloprovincialis
    For sessile benthic marine organisms adhesion to a stable substrate is important for survival. Sedimentary systems, however, generally lack stable surfaces. How sessile species like the mussel, Mytilus edulis, are able to achieve stability in unstable sediments is not fully understood. An intertidal mussel bed in the tidal flats in the Western portion of the Dutch Wadden Sea was selected to investigate adhesion behavior of M. edulis. Sampling was conducted along a hydrodynamic gradient along the Front-edge, Center and Back-edge of a mussel bed. Mussels along the bed edges were characterized by adhesion to fine shell debris and high numbers of byssus threads. Mussels in the center of the bed were characterized by adhesion to shells of living conspecifics and relatively low numbers of byssus threads. An experimental investigation to isolate the role of perturbation on adhesion strategies was carried out under laboratory conditions. Experimental results show that under perturbed conditions mussels developed increased numbers of byssus threads relative to mussels left unperturbed. Additionally, mussels subjected to perturbation preferentially adhered more frequently to fine shell debris while unperturbed mussels adhered more frequently to conspecifics. Results show that differentiation in adhesion strategy is driven by physical perturbation and mediated by bed density. The results also suggest that adhesion by mussels in a sedimentary environment is a selective process in which larger shell fragments and shells of conspecifics are the preferred substrate.
    Impact of mussel seed fishery on subtidal macrozoobenthos in the western Wadden Sea
    Craeymeersch, J.A.M. ; Jansen, J.M. ; Smaal, A.C. ; Stralen, M. van; Meesters, H.W.G. ; Fey-Hofstede, F.E. - \ 2013
    Yerseke : IMARES (Report / IMARES Wageningen UR C003/13 PR 7) - 123
    schaal- en schelpdierenvisserij - mossels - zaadvorming - benthos - waddenzee - shellfish fisheries - mussels - seed output - benthos - wadden sea
    Within the framework of PRODUS, the effect of mussel fishery on the macrofauna species sampled with a box-corer was investigated following a so-called split-plot design. Within areas where mussel seed fishery was allowed, 40 plots/locations were chosen within which one part was open for commercial fisheries and one part was closed of fisheries. Box-corers were taken in 21 of these locations, sampled one to several times.
    Effecten van mosselvisserij op de bodemstructuur, een analyse van Sidescan sonar opnames
    Jansen, J.M. ; Kersting, K. ; Vries, P. de; Davaasuren, N. ; Sneekes, A.C. ; Smaal, A.C. - \ 2013
    Den Helder : IMARES (Rapport / IMARES C164/12) - 43
    mosselteelt - nadelige gevolgen - detectie - bodemstructuur - waddenzee - onderzoeksprojecten - mussel culture - adverse effects - detection - soil structure - wadden sea - research projects
    Mosselzaadbanken in de Waddenzee worden bevist. In 2006 is een onderzoek gestart naar de effecten van mosselzaadvisserij op sublitorale natuurwaarden, het PRODUS onderzoek. Omdat de biodiversiteit in de Waddenzee nauw samenhangt met de driedimensionale structuur van de zeebodem wordt binnen PRODUS het effect van visserij op deze structuur bestudeerd aan de hand van sidescan sonar opnames die voor en na visserij worden uitgevoerd
    Development of automated tools for detailed monitoring of mussel and oyster beds using satellite data: spatial, temporal and vertical development
    Davaasuren, N. ; Stapel, J. ; Dankers, N.M.J.A. ; Jansen, J.M. - \ 2013
    Den Helder : IMARES (Report / IMARES Wageningen UR C146/13) - 42
    waddenzee - remote sensing - populatie-ecologie - mossels - schaal- en schelpdierenvisserij - wadden sea - remote sensing - population ecology - mussels - shellfish fisheries
    The main focus of this report is to develop the application of a novel technique in mapping of mussel and oyster beds using remote sensing, which can be combined with regular field monitoring to obtain an optimal monitoring strategy.
    Project validatie aanpassing bodemschaaf
    Jansen, J.M. ; Weide, B.E. van der - \ 2013
    Den Burg : IMARES (Rapport / IMARES Wageningen UR C130/13) - 12
    benthos - bemonsteren - waterbodems - methodologie - mariene gebieden - noordzee - benthos - sampling - water bottoms - methodology - marine areas - north sea
    Voor de bemonstering van benthos op het NCP is de bodemschaaf een adequaat monstertuig dat relatief snel bemonstert en de ruimtelijke variatie in het benthos goed integreert. Dit monstertuig heeft echter als nadeel dat er met een relatief grote maaswijdte van 5 mm wordt gewerkt, waardoor veel benthos-soorten en kleinere individuen gemist worden. Om ook dit kleinere benthos te kunnen bemonsteren is een zeefbakje ontwikkeld met een maaswijdte van 1 mm voor in de bodemschaaf. In het in dit rapport beschreven onderzoek is deze aanpassing op de bodemschaaf gevalideerd door middel van een vergelijking met de vangst-efficiëntie van de reguliere steekbuis op dezelfde monsterlocaties.
    Het mosselbestand op de PRODUS - vakken en de effecten van de visserij daarop : Effecten van mosselzaadvisserij op sublitorale natuurwaarden in de westelijke Waddenzee
    Stralen, M.R. van; Craeymeersch, J.A.M. ; Drent, J. ; Glorius, S.T. ; Jansen, J.M. ; Smaal, A.C. - \ 2013
    Scharendijke : Marinx (Marinx-rapport 2013.54 ÔÇô PR6 ) - 64
    mossels - mosselteelt - zaden - zaadbanken - natuurbescherming - visserij - schaal- en schelpdierenvisserij - bodemfauna - waddenzee - mussels - mussel culture - seeds - seed banks - nature conservation - fisheries - shellfish fisheries - soil fauna - wadden sea
    The Dutch mussel farming industry is based on the use of young mussels fished from naturally occurring mussel beds as raw material. The Wadden Sea is a designated protected area, and therefore the uptake of this mussel spat needs a permit under the Nature Conservation Act. In order to assess whether the natural values of the area will be affected by the fishery, insight is needed into the effects of mussel fishery on the nature in the Wadden Sea, and more particularly for the conservation objectives set out in the framework of Natura 2000 for the Wadden Sea. Therefore the Ministry of Economic Affairs and the Producer Organisation of Dutch mussel survey initiated the research project ‘PRODUS’ in 2006. Part of PRODUS is a comparative study at 40 sites with paired, adjacent research plots of 4 ha each, one of which was open to fishing the other completely closed to fishing. The sites were positioned in newly developed mussel spat beds. These study sites could not all be established at the same time because there needed to be enough new spat in each area, which depends on natural spat fall, and this varies significantly from year to year. In 2006 the sampling started in 10 sites, then the number of sites increased each year from 2010 to eventually include 40 sites. Mussels are generally fished twice a year; in the autumn on the newly formed spat beds, particularly in beds that are relatively unstable and therefore have a greater chance of disappearing in winter; and a second time following the spring, in the remaining beds in the more stable areas. In the study, the effects of the autumn and the spring fishery were analyzed separately. Parallel to the research in open and closed plots was a Wadden Sea wide survey conducted in 2008 in which the benthic composition in the sublittoral areas of Wadden Sea was determined. In the period 2008 - 2010 a comparison was also made of the benthic composition and environmental characteristics of wild mussel beds and cultured mussel plots. Furthermore, in 2009 and 2010 some of the larger mussel beds were permanently closed to fishing, and a study was conducted to investigate what the consequences for these mussel beds were. The present report deals with the development of the mussel stock in each of the sites, in the mussel beds that were closed in 2009 and 2010 and their backgrounds in relation to fishing.
    Effecten van mosselzaadvisserij op sublitorale natuurwaarden in de westelijke Waddenzee: samenvattend eindrapport
    Smaal, A.C. ; Craeymeersch, J.A.M. ; Drent, J. ; Jansen, J.M. ; Glorius, S.T. ; Stralen, M.R. van - \ 2013
    Yerseke : IMARES (Rapport / IMARES Wageningen UR C006/13 PR1) - 162
    schaal- en schelpdierenvisserij - schaal- en schelpdierenteelt - mossels - mosselteelt - milieueffect - nederland - natuurlijke hulpbronnen - waddenzee - natuurwaarde - shellfish fisheries - shellfish culture - mussels - mussel culture - environmental impact - netherlands - natural resources - wadden sea - natural value
    Dit rapport gaat over de effecten van mosselzaadvisserij in de westelijke Waddenzee op de natuurwaarden beneden laagwater: het sublitoraal. In de periode 2006 – 2012 is hiernaar onderzoek gedaan in opdracht van de overheid en de schelpdiersector. Het onderzoek is opgezet omdat onvoldoende bekend was welke gevolgen de mosselzaadvisserij zou kunnen hebben voor de natuurwaarden. Aangezien de Waddenzee een beschermd natuurgebied is, is er een vergunning nodig om te mogen vissen. Hiervoor moet door middel van een passende beoordeling worden aangetoond dat de visserij geen als significant te beoordelen negatieve effecten heeft op de realisatie van de instandhoudingsdoelstellingen voor de habitattypen en soorten waarvoor het gebied waarin de visserij plaatsvindt, is aangewezen. De profielen voor de habitattypen en soorten omschrijven wat onder die natuurwaarden moet worden verstaan. De vraagstelling van dit onderzoek komt er op neer na te gaan in hoeverre er effecten zijn van mosselzaadvisserij op de geformuleerde instandhoudingsdoelstelling voor habitattype 1110A, permanent overstroomde zandbanken (subtype ‘getijdengebied’). Omdat bij de aanvang van het onderzoek door diverse overheidsinstanties nog volop werd gewerkt aan het definiëren van de instandhoudingsdoelstellingen, is het onderzoek breder van opzet, en zijn meerdere variabelen in het onderzoek meegenomen waarmee natuurwaarden kunnen worden beschreven.
    Classification of Mussel Beds in Dutch Wadden Sea using high resolution WorldView-2 satellite data
    Davaasuren, N. ; Dankers, N.M.J.A. ; Stapel, J. ; Smit, C.J. ; Jansen, J.M. ; Baptist, M.J. - \ 2012
    Winter feeding activity of the common starfish (Asterias rubens L.): The role of temperature and shading
    Agüera García, A. ; Trommelen, M.A. ; Burrows, F. ; Jansen, J.M. ; Schellekens, T. ; Smaal, A.C. - \ 2012
    Journal of Sea Research 72 (2012). - ISSN 1385-1101 - p. 106 - 112.
    mussels mytilus-edulis - luidia-clathrata say - dutch-wadden sea - l echinodermata - bivalve prey - asteroidea - predator - growth - behavior - beds
    In the Wadden Sea common starfish is an important predator of mussel beds which in turn are relevant ecological and economic resource. To improve the management of mussel seedbeds, knowledge is required on over winter predation, a factor affecting mussel survival. The aim of this study was to assess the importance of A. rubens feeding activity during winter and how it relates with changes in temperature. Feeding activity of starfish was monitored during a full winter. The potential impact of temperature change on starfish–mussel seed interactions during winter was analysed. The factor shading was included, as changes in light intensity appear to be a primary governing factor for the timing of feeding activity. The results showed that temperature limits feeding rate and feeding activity of starfish during winter. However, starfish feeding rate exhibited very high sensitivity to temperature changes. Light intensity affected both feeding rate and feeding activity. It is concluded that starfish may not be an important factor destabilising seedbeds during a mean winter, but its importance may grow along with the increasing temperature due to climate change.
    Monitoring marine populations and communities: methods dealing with imperfect detectability
    Katsanevakis, S. ; Weber, A. ; Pipitone, C. ; Leopold, M.F. ; Scheidat, M. ; Boois, I.J. de; Jansen, J.M. - \ 2012
    Aquatic Biology 16 (2012)1. - ISSN 1864-7782 - p. 31 - 52.
    estimating animal abundance - visual census techniques - capture-recapture data - line-transect surveys - change-in-ratio - reef fish - aerial surveys - harbor porpoise - phoca-vitulina - parameter-estimation
    Effective monitoring of populations and communities is a prerequisite for ecosystem-based management of marine areas. However, monitoring programs often neglect important sources of error and thus can lead to biased estimates, spurious conclusions and false management actions. One such source of error is ‘imperfect detectability’, i.e. the inability of investigators to detect all individuals or all species in a surveyed area. Although there has been great effort to develop monitoring methods that account for imperfect detectability, the application of such methods in the marine environment is not as apparent as in other systems. Plot sampling is by far the most commonly applied method for biological monitoring in the marine environment, yet it largely ignores detectability issues. However, distance sampling, mark-recapture methods, repeated presence-absence surveys for occupancy estimation, and removal methods do estimate detection probabilities and provide unbiased estimates of state variables. We review these methods and the relevant tools for their application in studies on marine populations and communities, with the aim of assisting marine biologists and managers to understand the limitations and pitfalls associated with some approaches and to select the best available methods for their monitoring needs
    Mosseltransitie in de Waddenzee
    Jansen, J.M. ; Stralen, M.R. van; Kamermans, P. ; Sas, H. - \ 2012
    De Levende Natuur 113 (2012)3. - ISSN 0024-1520 - p. 113 - 115.
    mosselteelt - mytilus edulis - schaal- en schelpdierenvisserij - visserijbeheer - natuurbescherming - zaadbanken - waddenzee - biodiversiteit - mussel culture - mytilus edulis - shellfish fisheries - fishery management - nature conservation - seed banks - wadden sea - biodiversity
    Na een langdurig conflict tussen mosselsector en natuurbeschermers werd in 2009 een overeenkomst gesloten over de mosselvisserij in de Waddenzee. Daarin werd afgesproken dat de mosselvisserij op natuurlijke zaadbanken stapsgewijs verminderd zou worden, te vervangen door andere manieren van mosselzaadwinning. Op die manier, zo was de verwachting, zou de waddennatuur gespaard worden, terwijl de mosselsector kon overleven. We zijn inmiddels drie jaar verder. Worden de verwachtingen waargemaakt, en wat zijn de vooruitzichten?
    Mosselwad, onderzoeksprogramma voor herstel van mosselbanken in de Waddenzee
    Jansen, J.M. ; Dankers, N.M.J.A. ; Ens, B.J. - \ 2012
    De Levende Natuur 113 (2012)3. - ISSN 0024-1520 - p. 110 - 112.
    mytilus edulis - mossels - overleving - hydrodynamica - ecologisch herstel - asteroidea - aythya - wetenschappelijk onderzoek - waddenzee - mytilus edulis - mussels - survival - hydrodynamics - ecological restoration - asteroidea - aythya - scientific research - wadden sea
    Hoe staat het met de schelpdieren in de Waddenzee? Aan de hand van langjarige tijdreeksen geven we een overzicht van de ontwikkeling van Mossel (Mytilus edulis), Kokkel (Cerastoderma edule), Nonnetje (Macoma balthica) en nieuwkomer de Japanse oester (Crassostrea gigas). Hierbij speelt de vraag welke factoren bepalend zijn voor de aantalsontwikkeling van de verschillende soorten
    KBWOT 2011: maintainingh the quality of WOT shellfish stock assessments
    Troost, K. ; Poelman, M. ; Craeymeersch, J.A.M. ; Jansen, J.M. - \ 2012
    Yerseke : Centrum voor Visserijonderzoek (CVO report / Centre for Fisheries Research 12.004) - 20
    schaaldieren - tellingen - visbestand - kustwateren - shellfish - censuses - fishery resources - coastal water
    Het Centrum voor Visserij Onderzoek (CVO) van Wageningen UR is verantwoordelijk voor de wettelijke onderzoekstaken (WOT) voor het Ministerie van Economische Zaken, Landbouw en Innovatie. In 2011 is binnen KBWOT Visserij een project uitgevoerd met het doel om de kwaliteit van de schelpdierbestandsschattingen in de Nederlandse kustwateren te verbeteren. Resultaten, conclusies en aanbevelingen worden hier gerapporteerd.
    Winter temperature fluctuation effects on starfish (Asterias rubens L.) feeding rates
    Agüera García, A. ; Jansen, J.M. ; Schellekens, T. ; Smaal, A.C. - \ 2011
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