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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    Kwaliteitsbeoordeling verse schol : Vergelijking hand- en mechanisch gestripte schol van de MDV-1
    Schelvis-Smit, A.A.M. - \ 2016
    IMARES (Rapport / IMARES C003/16) - 36
    schol - verse producten - visproducten - kwaliteit - visverwerking - plaice - fresh products - fish products - quality - fish processing
    Heldere herleidbaarheid in de visketen
    Asselt, E.D. van; Roest, J.G. van der; Staats, M. ; Kok, E.J. ; Cuijpers, H.J.J. ; Ruth, S.M. van - \ 2015
    RIKILT Wageningen UR (RIKILT-rapport 2015.013) - 39
    technologie - visproducten - analytische methoden - naspeurbaarheid - vis - visverwerking - diepvriesvis - schaaldieren - garnalen - kabeljauw - verse producten - technology - fish products - analytical methods - traceability - fish - fish processing - frozen fish - shellfish - shrimps - cod - fresh products
    Heldere herleidbaarheid betekent dat kenmerken die bij verkoop worden toegekend aan visproducten terug te herleiden zijn in de keten. Het gaat daarbij om aspecten als de vissoort, maar ook de geografische oorsprong en de processing van de vis. Om de consument volledig inzicht te bieden in productinformatie is de etiketteringswetgeving ((EU) 1169/2011) recent aangescherpt en dienen dergelijke aspecten op het etiket vermeld te worden. In dit project is onderzocht welke administratieve en analytische methoden gebruikt kunnen worden om de voorgeschiedenis van visproducten aan te tonen. Er is gewerkt aan vier deelprojecten die door de projectpartners als prioriteit werden aangemerkt: administratieve traceerbaarheid in de kabeljauwketen, aantonen van watergehaltes in garnalen, vaststellen van geografische oorsprong van witpootgarnalen en onderscheid tussen verse en ontdooide vis. De resultaten van deze vier onderzoeken zijn in dit rapport beschreven.
    Fish silage as feed ingredient for fish and livestock
    Rurangwa, E. ; Vuuren, A.M. van; Poelman, M. - \ 2014
    Yerseke : IMARES (Report / IMARES Wageningen UR C135/14) - 57
    vissilage - voersamenstelling - veevoeding - visvoeding - eiwitbronnen - oost-afrika - visverwerking - vercommercialisering - fish silage - feed formulation - livestock feeding - fish feeding - protein sources - east africa - fish processing - commercialization
    The present report analyses through a literature review the potential of fish silage to valorise fish processing by-products into economically relevant protein sources for fish and livestock feed production in East Africa.
    Vis langer houdbaar dankzij vriesdroger op zonne-energie
    Bartels, P.V. - \ 2014
    Wageningen UR
    visproducten - vis - voedselbewaring - voedselverspilling - vriesdroging - droogmethoden - visverwerking - gedroogde vis - afrika - fish products - fish - food preservation - food wastage - freeze drying - drying methods - fish processing - dried fish - africa
    In veel Afrikaanse landen gaat vis verloren omdat er geen koeling voorhanden is. Een vriesdroger die is ontwikkeld door de Wageningse onderzoeker Paul Bartels en Ebbens Engineering is veel verspilling te voorkomen. De gedroogde vis is ook zonder koeling lang houdbaar.
    Economische effecten van een aanlandplicht voor de Nederlandse visserij
    Buisman, F.C. ; Oostenbrugge, J.A.E. van; Beukers, R. - \ 2013
    Den Haag : LEI Wageningen UR (LEI-rapport 2013-062) - ISBN 9789086156573 - 48
    visserij - visserijbeleid - economie - kosten-batenanalyse - bijvangst - marketing - discards - vismeel - visverwerking - visverwerkende industrie - nederland - fisheries - fishery policy - economics - cost benefit analysis - bycatch - marketing - discards - fish meal - fish processing - fish industry - netherlands
    The total net costs of the introduction of a landing obligation for the Dutch fishing fleet are estimated to amount to between 6 and 28 million euros, depending on the way in which the quotas are modified and the prices of the by-catches to be landed. In this regard, it is assumed that the catch composition and all fishing activities will be the same as in the baseline year (2011). This study therefore says nothing about how fishermen could modify their fishing activities in order to reduce the costs of the landing obligation, and what the effects of such a modification would be. In the event that the catch quotas remain the same as the current quotas plus discards (scenario 1), the costs of the landing obligation for the entire Dutch offshore fishing fleet would amount to between 6 and 14 million euros. By far the largest share of these costs would be borne by the cutter sector. The additional revenues from the landed by-catches are greatly dependent on the prices at which they can be sold, and do not compensate for the extra costs incurred in order to land the by-catches. The additional costs for full monitoring of all fishing trips by means of cameras would amount to approximately 6 million euros. The costs of observers on all trips would amount to approximately 18 million euros. The costs of enforcement may work out lower if less than 100% of the ships and trips are checked.
    Minder visbederf in ontwikkelingslanden
    Schelvis-Smit, A.A.M. - \ 2012
    Kennis Online 9 (2012)april. - p. 17 - 17.
    visproducten - voedselbederf - verliezen - bederfelijke producten - vriesdroging - ontwikkelingslanden - visverwerking - fish products - food spoilage - losses - perishable products - freeze drying - developing countries - fish processing
    In ontwikkelingslanden gaat veel vis verloren omdat het niet goed of niet op tijd verwerkt kan worden. In het EU-project SecureFish, met een budget van bijna vier miljoen euro, werken onderzoekers van Wageningen UR samen met lokale bedrijven in drie visketens in Afrika, Azië en Latijns Amerika aan haalbare oplossingen.
    The quest for sustainable livelihoods : women fish traders in Ibaka, Niger Delta, Nigeria
    Udong, E.E. - \ 2011
    Wageningen University. Promotor(en): Anke Niehof, co-promotor(en): Aad van Tilburg. - [S.l.] : S.n. - ISBN 9789085859345 - 317
    vrouwen - geslacht (gender) - vis - markthandelaars - handel - strategieën voor levensonderhoud - duurzaamheid (sustainability) - duurzame ontwikkeling - visverwerking - marketing - sociologie - hiv-infecties - acquired immune deficiency syndrome - nigeria - afrika - women - gender - fish - market traders - trade - livelihood strategies - sustainability - sustainable development - fish processing - marketing - sociology - hiv infections - acquired immune deficiency syndrome - nigeria - africa

    The contribution of fisheries to food security in Africa cannot be underestimated. It provides

    over 30 percent of the protein consumed by the Nigerian population. However, Nigeria

    produces only about 45 percent of the fish requirement locally while the shortfall of about 55

    percent is imported. Over 80 percent of the local production is from the artisanal, small scale

    sector. While several studies have been conducted on the productivity of many water bodies,

    endemic fish species, different fisheries, boats mechanization and the role of the fishermen,

    socio-economic and gender issues in fisheries have received scant attention. Such research has

    therefore become necessary for the development of relevant policies and intervention

    programmes. The sustainable livelihood approach was used in facilitating the understanding of

    how the women fish traders’ livelihoods are created, sustained and constrained by a set of

    complex factors and processes including institutions and culture. The main objectives of this

    study were to:

    1. Contribute towards the livelihood and gender theory by focusing on the performance of

    women fish traders in the economic and domestic domains in a coastal fishing

    community, given the institutional and cultural constraints, their vulnerability and

    susceptibility to HIV and AIDS;

    2. Identify the implications for household food and livelihood security and the critical

    factors needed to be considered in the development of relevant policies that would

    ensure sustainable livelihoods and lower vulnerability levels for the women fish traders

    and their households.

    Specifically, the study aimed at highlighting the complexity of sustaining rural

    livelihoods by women fish traders in a coastal fishing community in Nigeria and the flexibility

    and variation, which give the fish trading system its continuing ability to link other commercial

    and non-commercial sectors, characterised by constantly shifting relationships. A gender

    perspective was applied throughout the study. The study was carried out in Ibaka, a dynamic

    commercial centre and the largest coastal fishing community in Akwa Ibom State in the Niger

    Delta of Nigeria, which is largely undeveloped but has over 70 percent of the population

    depending on the fisheries for their livelihood. A cross-sectional study design was used, in

    combination with qualitative and quantitative research methods. Apart from being descriptive

    in nature, an analytical approach was also used by arranging and processing the collected data

    in different ways and through testing different hypotheses.

    Due to the large variation in the range and scale of enterprises obtained, the fish traders

    comprise some of the largest wholesalers on the Nigerian coastline and some of the poorest

    strolling hawkers, living from hand-to-mouth. This is a characteristic feature of a major

    market, and the study seeks to identify the key social, economic and institutional forces, which

    generate, maintain and continue to reshape this diversity. The forces originate from the market,

    its links with the household, community, and national level processes, which create conflicting

    interests and pressures on the individual fish traders as they struggle for survival and the

    accumulation of wealth. These contradictions renew and transform the trading relations,

    including their constraints.

    The main household resources available and accessible were the labour of the women

    fish traders themselves and the female members of their families. Through family ties,

    churches, professional associations, social clubs and osusu groups trade networks and social

    churches, professional associations, social clubs and osusu groups trade networks and social

    capital, on which depended success in the fish trade were developed. The economic resource

    was the different species of fish provided by the sea. The physical resources included equipments such as boats, nets, outboard engines, landed properties, houses, and mobile

    phones. The women also used their own trading and language skills, and years of experience in

    the trade to their advantage. Those with sufficient years of education also deployed their

    educational skills to their advantage. The gendered nature of the fish trade and the fact that it

    requires professional skills ensures that labour is expensive to hire. Only very few women fish

    traders, operating on a large scale and earning higher incomes possessed tangible assets, and

    were able to acquire equipments such as outboard engines, fishing and transport boats, and

    other assets such as land, houses, generators, deep freezers, market stalls as well as fish trade

    titles

    Processing and trading in either bonga, big fish or crayfish, and providing labour for

    fish processing remain the main livelihood strategies and the main source of livelihood for

    most women fish traders in Ibaka. Most of the incomes used for the maintenance of their

    children and households are derived from these. Diversification into other economic activities

    including fashion designing, subsistence farming, food processing, money lending, food

    vending and petty trading is also adopted by most women, while the better-off are involved in

    water transportation, equipment leasing, money lending, bukka business. The strategies

    adopted are affected by factors such as age, skills acquired, years of experience, working

    capital available for the trade, educational status, and number and ages of children. Younger

    traders try to acquire other skills and formal education to enable them diversify while the older

    women concentrate on earning higher incomes through developing their social capital,

    expanding their networks, and making better business connections, to enable them diversify,

    educate their children and secure their livelihoods

    The study identifies three groups of women fish traders in Ibaka: the bonga, big fish

    and crayfish traders, who all operate as small, medium and large scale traders, depending on

    the amount of working capital used. Many similarities were observed in the lack of access to

    resources, lack of infrastructural facilities, the mode of recruitment into the trade, the

    involvement of family members, the use of social capital, and the use of incomes for the

    livelihood sustenance of their households. However, significant differences by age, educational

    status, years of experience, working capital and wealth status were observed between the three

    fish trade groups. Big fish traders with older members had more experience, higher working

    capital and incomes, and consequently more assets than bonga and crayfish traders. In

    addition, limited access to resources for most of the poor fish traders, especially from the

    bonga group, forced them into activities that yielded low returns, such as casual labour and

    subsistence farming, re-enforcing their poor performance in the economic and domestic

    domains.

    The study shows that the fish trade is a gendered activity, and the most profitable

    livelihood strategy undertaken for the sustenance of households in Ibaka, providing the women

    with incomes used for the maintenance and upkeep of their households, and the payment of

    their children’s school fees, healthcare bills and other needs.

    However, in spite of their different circumstances, interests and opportunities, the

    women fish traders all face similar risks, shocks and stress, associated with their location and

    environment. These include seasonality, conflicts, and HIV and AIDS, as well as institutional

    and cultural constraints, which make them vulnerable. The institutional constraints identified

    include lack of physical and marketing infrastructure, financial services, and access to

    resources, information asymmetries, high transaction and labour costs, while the cultural

    constraints include the beliefs, taboos, ethnicity, norms, values and family life. The adaptation

    strategies used for the institutional constraints included buying and selling on credit, use of

    social capital and networking, membership of osusu groups, patronising local money-lenders,

    use of family labour, including under-aged children, sourcing for water from shallow wells and

    commercial boreholes for washing and drinking respectively, patronising traditional health

    practitioners and patent medicine stores, and the churches over their health problems. On the

    other hand, the adaptation strategies for the cultural constraints included intermarriage with the

    indigenes, joining associations and clubs, working from home on days of cultural festivals,

    non-pooling of incomes and striving for independence and autonomy.

    Apart from the cultural and institutional constraints the study shows that the fish trade

    is affected by seasonality which is a major cause of vulnerability. During the lean season which

    covers about six months of the year, fishing activities and incomes are reduced to a minimum

    for all the fish species due to high fish prices at the beach and insufficient working capital. The

    traders then experience periods of food shortage and hunger in the household, making them

    highly vulnerable and susceptible to poverty and HIV and AIDS. Fire incidents and conflicts

    also contribute to their vulnerability.

    The study shows that participation in the fish trade is through kinship and marriage, and

    only women who possess specific skills, working capital, available networks and social capital,

    and belong in a certain culture, location and ethnicity can participate. It is also determined by

    household structures, gender division of labour, marriage, residence and inheritance patterns.

    However, in the absence of functional institutions, and with several cultural barriers to contend

    with, the fish trade, which is often regarded as an extension of household tasks embarked upon

    to ensure the livelihood sustenance of the household, is carried out by the women fish traders

    using social networking and social capital, to facilitate their trading profession. Sources of

    social capital include kin, neighbours, friends, matron-client relationships, mutual trust, osusu

    groups, social clubs and associations, norms and values, and churches.

    The study shows that the Ibaka fish market, like most rural food markets in West

    Africa, operates without any supporting structures. It lacks infrastructural facilities and access

    to information, with a non-existent line of communication between the women fish traders and

    the consumers. The provision of an improved communication system, infrastructural facilities,

    credit systems and adequate information would therefore reduce the transaction costs and make

    for a better coordination mechanism in the market. The study also shows that the fish market in

    Ibaka operates through incomplete contract transactions, where it is impossible to reach an

    agreement in advance about all possible events that could affect the exchange. Even though it

    is a rural market dealing with a single commodity, and does not quite fit into the modern urban

    market category, it possesses many attributes of an imperfect market. These include nonhomogenous

    products, fewer buyers and sellers, no market transparency and barriers to entry

    and exit. The various types and degrees of market imperfection characterise Ibaka market as a

    missing market and a thin, incomplete and interlocked market.

    The study shows that performance in the economic domain is mainly determined by the

    women fish traders’ ability to mobilize sufficient working capital from different sources and

    arrange for regular supply of fish, social capital and networking ability, the years of

    experience, skills acquired, the ability to pay for labour, the profitability of the enterprise, level

    of income, the ability to save, their assets base and wealth status, among others. Performance in

    the domestic domain is determined by the ability to educate children, the type of housing, the

    energy type used for lighting and cooking, the health status of the household, and the number

    of hours spent in the household.

    The study shows that performance in both domains is influenced by age, years of

    experience, skills acquired, amount of working capital used, educational status, status of

    mother in the trade, social capital and the number of children. The women fish traders also

    derive potential benefits associated with their location if they successfully adapt to the

    conditions and adopt sustainable livelihood strategies. All these together, affect their

    performance in the economic and domestic domains, and their success at maintaining the

    livelihoods of their households. The big fish and crayfish traders seemed to perform better than

    the bonga traders generally, both in the economic and domestic domains.

    The study also shows that good performance in the economic domain engenders good

    performance in the domestic domain because the possession of sufficient incomes enables the

    women to feed and educate their children, maintain a healthy household and take care of

    themselves. Sufficient incomes also engender the ability to own or live in permanent structures

    in the community and the use of generating sets for lighting and kerosene stoves for cooking in

    the households. However, the lack of basic information and documentation on HIV and AIDS

    in Ibaka has made it impossible to determine how susceptible and vulnerable the women fish

    traders and their families are to the disease even though evidence from fishing communities in

    other countries has shown fisherfolk to be more vulnerable than rural upland populations.

    In conclusion, the resilience of the women fish traders and their survival in the fisheries

    sector can be explained through the rigid and gendered division of labour. This is backed by

    the determination of the women to become independent economically and overcome the

    cultural biases imposed through patriarchy, polygamy and discriminatory inheritance laws.

    Also, there is the incentive of being able to take care of themselves and their children, gain

    some power, agency and autonomy. The realization that men depend on the women to dispose

    of their fish catches, giving the fish economic value, further strengthens the position of the fish

    traders in the fishery economy of Ibaka. The women fish traders’ conversion of profits made

    from the fish trade into ownership of fishing and transportation boats is true entrepreneurship.

    Using new and innovative ways of finding new or acquiring more customers and accumulating

    capital is also entrepreneurial. However, there is far less risk, both socially and economically,

    in expanding the scope in the trade and climbing in the female market hierarchy than in

    investing in a male domain.

    The fact that the women fish traders live in the same community and locality, and are

    exposed to similar institutional and cultural constraints does not mean that there are no

    differences between the three fish trade groups. The constraints impact differentially both

    within and between the groups and the strategic responses depend on the category the fish

    trader belongs to within the group and her wealth status in the trade and the community.

    Environmental factors and processes such as climate change and oil pollution, and the general

    economic crisis, also make fisherfolk vulnerable and susceptible to HIV and AIDS. While the

    government is trying to extend development to the rural areas, it is pertinent that remote

    communities like Ibaka should be specially targeted. Gender mainstreaming should also be

    incorporated in the development process in order to reduce glaring inequalities, with certain

    social groups being marginalized while others are privileged. This will reduce the women

    traders’ level of vulnerability to constraints, stresses, risks, and shocks in our rural

    communities.

    Visverwerking en visgroothandel in Nederland; Recente ontwikkelingen
    Beukers, R. - \ 2011
    Den Haag : LEI, onderdeel van Wageningen UR (Rapport / LEI : Onderzoeksveld Natuurlijke hulpbronnen ) - ISBN 9789086155040 - 95
    visverwerking - visverwerkende industrie - visproducten - agrarische handel - sectorale analyse - fish processing - fish industry - fish products - agricultural trade - sectoral analysis
    Het Productschap Vis heeft het LEI gevraagd een analyse te maken van de economische positie en de belangrijkste ontwikkelingen in de visverwerking en visgroothandel in Nederland. Het rapport is een update van vergelijkbare onderzoeken die in 2000 en 2005 in opdracht van het Productschap Vis zijn uitgevoerd. Het onderzoek is grotendeels gebaseerd op bedrijfseconomische gegevens van visverwerkende bedrijven en visgroothandels
    Improving the utilization of Silver carp (Hypopthalmichthys Molitrix) and other under-utilized fish species, especially Fresh water Bream (Abramis brama)
    Bartels, P.V. ; Kals, J. - \ 2008
    Wageningen : Agrotechnology & Food Sciences Group (Rapport / Agrotechnology and Food Sciences Group (AFSG) 767) - 71
    visverwerkende industrie - visverwerking - visproductie - visproducten - nieuwe producten - dierlijke eiwitten - snijden - voedselverwerking - karper - iran - fish industry - fish processing - fish production - fish products - new products - animal proteins - cutting - food processing - carp - iran
    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
    SEAFOODSENSE D18 Report on ETHICOD consumer study: detailed description of the procedures
    Schelvis-Smit, A.A.M. ; Sveinsdottir, K. ; Martinsdottir, E. ; Kole, A.P.W. - \ 2008
    IJmuiden : IMARES (Report / IMARES C010/08) - 38
    visproducten - visverwerking - dierenwelzijn - stressfysiologie - houding van consumenten - consumentengedrag - fish products - fish processing - animal welfare - stress physiology - consumer attitudes - consumer behaviour
    The aim of this product test was to determine the effects of pre-slaughter stress on both the intrinsic sensory properties as well as the consumer perception of the products. Variables included the effect of information provided with the products, the effect of knowledge that the consumers have on welfare aspects, the effect of reliability of the information provided and the effect of the different test situations. The consumer tests were performed in both Iceland and The Netherlands both in an inEhome and a central location situation. Consumers’ attitude and behaviour towards animal welfare were asked. This report describes the procedures followed.
    Sociaaleconomische indicatoren van de Nederlandse vissector
    Smit, J.G.P. ; Taal, C. - \ 2007
    Den Haag : LEI (Rapport / LEI : Domein 5, Ketens ) - ISBN 9789086151707 - 33
    agrarische economie - landbouwsector - vis vangen - visverwerkende industrie - visverwerking - arbeid (werk) - arbeidsmarkt - sociale economie - nederland - agricultural economics - agricultural sector - fishing - fish industry - fish processing - labour - labour market - socioeconomics - netherlands
    Cijfermatig overzicht van werkgelegenheid en inkomen van de totale Nederlandse vissec-tor in 2006. In de Nederlandse vissector werken ruim 20.000 mensen. Vooral in de visver-werking en de visdetailhandel werken veel personen met een flexibele arbeidsrelatie. Het totale aantal fte's bedraagt ruim 15.000. Bijna een derde van de medewerkers in de vissec-tor bestaat uit vrouwen. Het totale inkomen in de vissector is geschat op 644 miljoen euro. A figures-based overview of employment and income of the total Dutch fish sector in 2006. Over 20,000 people are employed within the Dutch fish sector. Within the fish pro-cessing and fish retail sections, there are particularly large numbers of people working on the basis of a flexible employment relationship. The total number of fte's amounts to over 15,000. Almost a third of those working within the fish sector are female. The total income of the fish sector is estimated at ¿644 million.
    Seafood research from fish to dish : quality, safety and processing of wild and farmed fish
    Luten, J.B. - \ 2006
    Wageningen : Wageningen Academic Publishers - ISBN 9789086860050 - 567
    zeevruchten - visproducten - visverwerking - voedselkwaliteit - voedselveiligheid - lipiden - voedselbewaring - houding van consumenten - methodologie - seafoods - fish products - fish processing - food quality - food safety - lipids - food preservation - consumer attitudes - methodology
    In this book, scientists from various disciplines address the advances in seafood research with respect to quality, safety, consumer’s demands and processing of wild and farmed fish. The nutritional properties of marine lipids and lipid oxidation from model systems to seafood are presented. Several contributions on the effects of natural anti-oxidants to prevent oxidation are also included. Effects of dietary factors on muscle tissue quality, pre-rigor processing and brining of farmed cod are covered. The development of rigor mortis and the quality of muscle in relation to commercial and experimental slaughter techniques are also discussed. Consumer’s knowledge, perception and need for information about seafood are discussed. Topics such as shelf life and microbial quality of seafood are covered in a range of contributions. Inactivation of micro organisms or biopreservation of seafood are included. Attention is paid to the development of the Quality Index Method for the evaluation of the quality of fresh fish and products. The characterisation and the quality of processed by-products are also presented. The presence of trace elements and organic contaminants in variety of seafood products is highlighted. Finally, several contributions regarding advanced methodologies to determine the quality of seafood are presented.
    De Nederlandse visverwerkende industrie en visgroothandel
    Smit, J.G.P. - \ 2006
    Den Haag : LEI (Rapport / LEI : Domein 2, Bedrijfsontwikkeling en concurrentiepositie ) - ISBN 9789086151189 - 57
    vis - visverwerkende industrie - visproducten - visverwerking - landbouwsector - nederland - marktstructuur - landbouw als bedrijfstak - fish - fish industry - fish products - fish processing - agricultural sector - netherlands - market structure - agriculture as branch of economy
    Cijfermatig overzicht van de sectorstructuur en de marktresultaten van de visverwerkende industrie en groothandel in Nederland. De gegevens zijn gebaseerd op enquêtes van alle bedrijven in de sector, aangevuld met statistische gegevens. De cijfers hebben betrekking op het jaar 2005. De visverwerkende industrie en groothandel bestaat uit bijna 300 bedrijven. De bedrijven zijn ingedeeld in acht sectoren op basis van activiteiten, verwerkte vissoorten en de markten waarin het bedrijf actief is. Van de sectoren zijn economische kengetallen gepresenteerd en zijn indicaties gegeven van veranderingen in de omgeving van de sector. A data-based overview of the sector structure and the market results of the fish-processing industry and wholesale in the Netherlands. The data is based on surveys carried out among all businesses in the sector, supplemented with statistical data. The figures relate to the year 2005. The fish-processing industry and wholesale sectors consist of almost 300 businesses. The businesses are divided into eight sectors based on activities, processed fish types and the markets in which the businesses are active. Key economic figures are presented for these sectors, and indications are given of changes in the environment of the sector.
    Quality of Fish from Catch to Consumer : labelling, Monitoring and Traceability
    Luten, J.B. ; Oehlenschlaeger, J. ; Olafsdottir, G. - \ 2003
    Wageningen : Wageningen Academic Publishers - ISBN 9789076998145 - 456
    vis - visverwerking - voedselkwaliteit - kwaliteitscontroles - kwaliteitsetikettering - monitoring - europa - fish - fish processing - food quality - quality controls - quality labelling - monitoring - europe
    Production of high-quality fish oil from herring byproducts
    Aidos, I.M.F. - \ 2002
    Wageningen University. Promotor(en): R.M. Boom; A. van der Padt; J.B. Luten. - S.l. : S.n. - ISBN 9789058087287 - 203
    visoliën - visverwerking - bijproducten - haringen - oxidatie - onverzadigde vetzuren - voedselkwaliteit - verwerkingskwaliteit - opslagkwaliteit - fish oils - fish processing - byproducts - herrings - oxidation - unsaturated fatty acids - food quality - processing quality - storage quality

    In this work, the feasibility of producing high-quality fish oil from herring byproducts was evaluated in various ways. With this, a contribution has been made to a more efficient usage of natural resources while yielding a high-quality product. Crude oil extracted from herring byproducts is relatively rich in essentialw-3 PUFAs such as EPA and DHA, and is relatively stable during storage. The main conclusions of this study were: herring byproducts from the entire year are an adequate raw material for fish oil production; good quality fish oil can be produced from salted herring byproducts, and byproducts from different herring processing generate oils with different qualities. It is also shown that sorting of the byproducts does not result in oils of strongly different qualities, showing that this step is not required. However, it is concluded that from stored byproducts oil with higher levels of PUFAs content could be obtained. The best quality oil was achieved while processing at the highest throughput of the pump and at intermediate decanter speed. It has been observed that the best temperature to keep the oil is 0°C. The extracted crude herring oil presented relatively low levels of contaminants, PCBs and dioxins. Finally, the crude herring oil was refined and compared with commercially available menhaden oil. Similar properties such as oxidative stability and off-taste development were found. The currently obtained knowledge of fish oil extracted from herring byproducts is the first essential step towards the valorization of byproducts from different fatty fish species into production of fish oil, thereby contributing to a better utilization of the marine resources that are available.

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