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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    Towards sustainable tuna fishing: understanding the role of private incentive mechanisms
    Tolentino-Zondervan, Frazen - \ 2017
    Wageningen University. Promotor(en): A.G.J.M. Oude Lansink; S.R. Bush, co-promotor(en): P.B.M. Berentsen. - Wageningen : Wageningen University - ISBN 9789463436236 - 205
    tuna - fishing - sustainability - sea fishing - marine fisheries - marine animals - environmental protection - value chain analysis - decision making - philippines - south east asia - business economics - tonijn - vis vangen - duurzaamheid (sustainability) - sportzeevisserij - zeevisserij - zeedieren - milieubescherming - waardeketenanalyse - besluitvorming - filippijnen - zuidoost-azië - bedrijfseconomie

    Unsustainable fishing practices, including the use of non-selective fishing methods and Illegal Unreported and Unregulated (IUU) fishing, contribute to the decline of tuna fish stocks in the Western and Central Pacific Ocean (WCPO). This has led to emergence of different public and private governance arrangements to foster the sustainable exploitation of tuna stocks. This thesis focuses on the performance of three innovative private incentive mechanisms: Fishery Improvement Projects (FIPs), International Seafood Sustainability Foundation’s Pro-active Vessel Register and eco-FADs, and Marine Stewardship Council (MSC) certification, to deliver economic incentives for improved production. The overall objective of this thesis is to evaluate the extent to which private incentive mechanisms influence Filipino fishers’ decision to improve their fishing practices.

    In order to address the overall objective, this thesis first analyses and compares the ways existing private incentive mechanisms influence the upgrading strategies of Filipino tuna fishers in the value chains (in chapter 2). Second, it evaluates the important determinants for small-scale handline fishers’ decisions to participate in two FIPs for yellowfin tuna in the Philippines (in chapter 3). Third, it examines the effect of MSC certification on the allocation of fishing days by Filipino purse seiners operating in Parties to Nauru Agreement (in chapter 4). And finally, it analyses the profitability of investments in measures needed to comply with private incentive mechanisms by Filipino purse seiners (in chapter 5).

    The findings show that overall, the incentive mechanisms are able to improve the practices of fishers, however only to a limited extent. The first two chapters (chapters 2 and 3) show that producers first need to have the capabilities to meet the requirements of private incentive mechanisms, so that they can be included in the value chain and that they can realise the incentives offered by these mechanisms. However, being capable does not guarantee that producers will improve their practices. As shown in the last two chapters (chapters 4 and 5), producers must also have the willingness to upgrade, based on their risk attitude and on the ability of the economic incentive to cover the additional costs and to compensate for the increase of the risks of participation of producers. Given that producers have the availability of capabilities to upgrade and that the benefit is sufficient to opt for participation, then producers may decide to improve their practices, which may contribute to the sustainability improvement goal of private incentive mechanisms. As a consequence of this finding, the incentives, inclusiveness, and improvements must be taken into account in both the design and implementation of private incentive mechanisms.

    ‘Even fish have an ethnicity’: livelihoods and identities of men and women in war-affected coastal Trincomalee, Sri Lanka
    Lokuge, Gayathri Hiroshani Hallinne - \ 2017
    Wageningen University. Promotor(en): D.J.M. Hilhorst, co-promotor(en): M. de Alwis; G. Frerks. - Wageningen : Wageningen University - ISBN 9789463436182 - 237
    livelihoods - livelihood strategies - fishing communities - fishing - women - gender - conflict - war - sri lanka - south asia - middelen van bestaan - strategieën voor levensonderhoud - vissersgemeenschappen - vis vangen - vrouwen - geslacht (gender) - conflict - oorlog - sri lanka - zuid-azië

    Located within the nexus between identity and livelihoods, this thesis explores how the economic activities of fisher livelihoods are shaped by socio-cultural, political and identity dynamics, and how fisher livelihoods, in turn, shape and reproduce these dynamics in post-war Sri Lanka’s coastal district of Trincomalee. The analysis focuses on the economic sociology of fisheries, the inequalities and marginalities in livelihood spaces that are created through intersecting identities such as gender and ethnicity, and the way fisheries are governed—both formally and informally—in politically volatile contexts. This thesis argues that ethnic identity is mediated by other social identity categories, such as gender, location and type of livelihood activity, in the creation of unequal access to livelihood spaces. However, men and women often attempt to subvert structural discriminatory patterns, with differing degrees of success.

    Since the country became independent in 1948, Sri Lanka’s history has been dominated by conflict centred on competing ethno-political interests, particularly in terms of access to state power. The perceived privileging of the ethnic minority Tamils by the British colonial powers led to a series of political moves by successive governments in post-independence Sri Lanka. This included making Sinhalese the official language of the country and awarding special status to Buddhism in the constitution. Subsequently, unfavourable perceptions about the privileging of the majority ethnic group and their cultural, social and political symbols led to the formation of Tamil militant groups including the Liberation Tigers of Tamil Eelam (LTTE).

    Most discourses on conflict in Sri Lanka have strong ethnic dimensions. However, arguably, ethnic lines are used mainly for mobilising the masses for conflict. The killing of 13 Government of Sri Lanka (GoSL) Army soldiers in 1983 in an ambush by the LTTE resulted in widespread anti-Tamil riots in the capital city of Colombo. This event is commonly identified as the trigger point for the protracted war between the Tamil militants and the GoSL. The war continued for three decades, with fluctuating degrees of intensity, until the LTTE faced a military defeat at the hands of the GoSL in 2009. However, the ending of the war does not translate linearly into a post-war condition in Sri Lanka, given the continued presence of the military in the directly war-affected North and East and the social and economic inequalities and tensions that create divisions within the country, undermining meaningful and sustained rebuilding efforts in Sri Lanka.

    The thesis begins with an introductory first chapter that presents the aims of the study, locates the research within the context of post-war Sri Lanka, describes the study areas and presents an overview of the methodological approach and theoretical frameworks used. Located in fish landing sites, markets and religious places, Chapter 2 focuses mostly on the livelihoods aspect of the thesis. It analyses how economic activities, such as fishing livelihoods, are deeply and intricately embedded in the cultural and social fabric of the daily lives of individuals, families, communities and institutions. This chapter provides a detailed analysis of how fishing livelihoods are more than an income-generating activity for men and women, considering the different inter- and intra-group value systems that apply to fisher-folk in their day-to-day practices. At the individual level, given the high risk involved in braving the seas every day, religion takes a central place in a fisher’s life, irrespective of their specific faith. This phenomenon is heightened by war-related insecurities and threats. However, individual and communal struggles over contradictory economic and religious values are an ever-present aspect of the fishermen’s religiosity. We found this process to be marked by rationalising and meaning making, embodied through the daily experiences of these fishermen and women.

    The findings show that people take advantage of the malleable nature of religious doctrine to mix, match and choose from different religions to suit the current need and the occasion. Religious beliefs and ideologies also create and sustain socio-political differences, which are further constructed by macro-level political discourses. At the community level, although there are complex, historical tensions between all of the religious groups in Trincomalee, with heightened tension and violence during the war years, Hindus and Buddhists share considerable religious complementarity. Muslims are increasingly marked as separate—in spaces of religious ritual, such as the Hindu temples, and also in terms of types of fishing livelihoods. Most Muslims also see themselves as separate. Through an analysis of how discourses on religious identity play out in everyday life, Chapter 2 argues that economic rivalries over fishing resources may spill over into—or be reinforced by—religious and ethnic tensions in the post-war context.

    Chapter 3 focuses more on the identity aspect of the thesis, with research based in the lagoons and shallow seas of Trincomalee. Using intersectionality theory, this chapter examines how the intersection of the social categories of gender, race, ethnicity and location creates structural inequality. Drawing upon narratives of Muslim, Tamil, Sinhalese and indigenous/Veder women catching and marketing fish in coastal Trincomalee, this chapter analyses how historical factors, such as population movements and war, have shaped the current realities and positions of women. Further, the chapter illustrates that, although a clear case can be made that certain groups of women are particularly disadvantaged at the intersection of ethnicity, caste and livelihood location, similarities in cultural gender norms across ethnic lines mean that the inequalities facing women may overshadow other identities.

    Although multiple inequalities affect these women’s daily lives and participation in activities, they are not passive victims; they use their own agency to negotiate for access to livelihoods. Nevertheless, the women engaged in various fishing-related activities who participated in this study appear to be completely invisible to the government fisheries management bodies. The resulting lack of institutional representation disadvantages these women in negotiations for space to engage in their livelihood activities. Registration of these women in coastal livelihoods would provide them with a first measure of recognition and empowerment, strengthening their chances of negotiating access to livelihood resources.

    With the ending of the three-decade-long civil war, changes have taken place in the main wholesale fish market in the conflict-affected coastal district of Trincomalee. These changes are reflected in the market structure and governance, as well as in the number and kinds of people inside the market. A marketplace that was formerly multi-ethnic and mixed gender has become dominated by male traders from the Sinhalese Buddhist ethnic majority group, excluding women and ethnic minority men. By focusing on the multiple masculinities of male wholesale dealers and their interactions with fishermen suppliers, Chapter 4 a) provides a nuanced analysis of the historical and contextual factors that shaped the political and economic hegemonising processes of the wholesale fish market; b) attempts to understand how, within this hegemonising process, the dealers embody and negotiate between overlapping ethno-nationalist, enterprising and patron–provider masculinities; and c) analyses how these diverse masculinities ultimately may contribute to the collapse of the gendered ethnic dominance at the market. This chapter adds nuance to the ethnicised discourse on war and livelihoods in Sri Lanka and globally. Further, the chapter also brings a masculinities approach to the study of contemporary maritime anthropology.

    Chapter 4 thus continues the focus on identities and attempts to understand ethnicity as socially constructed and as mediated by other forms of identity, such as gender, or, more specifically, through masculinities. Focusing on masculinities and the different subject positionalities of men at the wholesale market—a dimension that has been largely missing in Sri Lankan discourses on post-war livelihoods and identity—this chapter provides a nuanced analysis of how a unidimensional focus on ethnicity or gender is insufficient to explain the post-war power dynamics. It analyses how the embodiment and practice of masculinities, such as risk-taking entrepreneurs and dare-devil border guards, show both complicity with and resistance to political and economic domination or hegemony at a given point, and how this changes over time.

    The findings indicate that hierarchies of social and political power are dynamic. More specifically, the understanding of masculinity as plural, dynamic and negotiated, combined with the display of agentive power by subordinated or marginalised groups, results in hegemonies or structures of dominance that are continually shaped and reshaped at the everyday level. There are masculinities, rather than one way of doing masculinity. These different ways of doing masculinity challenge the dominant power structures and hierarchies.

    Chapter 5 focuses on a particular illegal fishing practice (disco net fishing) and examines how governance processes mitigate or exacerbate social tensions. The chapter centres on the interaction between formal and informal fisheries stakeholders and fishers, arguing that perceptions about the legitimacy of formal state actors in regulating fisheries strongly influence compliance behaviour. This chapter demonstrates that the perceived lack of legitimacy of the state in fisheries regulation was profoundly influenced by context and timing. The active interest taken by the state, aided by the military, in tightening fisheries regulation and enforcement measures after the end of the war violence was seen by the disco net fishermen as a strongly negative factor in their daily lives and livelihoods. When shared war-related violence forms the backdrop for state, non-state and citizen interactions and normative frameworks, negotiations regarding access to resources and regulatory efforts become not just a livelihood and resource management effort, but a broader and more sensitive political issue.

    Faced with the perceived failure of the state as a legitimate actor to regulate fisheries, Chapter 5 found that the disco net fishermen turn towards other forms of everyday politics, power dynamics and local legitimacies. However, these local legitimacies vary in how they manifest and draw power. Therefore, the contestations reported in this chapter are not simply about forum shopping between the formal state and informal community institutions and norms; rather, they are also about navigating within the formal and the informal rules of the game. The case of illegal fishing in this chapter clearly illustrates the need to understand fisheries governance issues as a manifestation of a larger problem at the level of state–society interaction, specifically regarding the legitimacy of the actors involved in governing fisheries in Trincomalee. Therefore, this chapter concludes that there is a need to understand and address fisheries governance issues as ‘wicked problems’ and as processes that need to go beyond conventional planning approaches.

    The concluding chapter of the thesis highlights five specific conclusions based on the findings presented in the previous chapters. First, the embedded nature of economic activities, such as those in fisheries, means that they are dynamic, time- and space-bound, and mediated by how men and women chose to embody and disembody morality, religiosity and competing or complementary value systems. These dynamisms in morality contribute to the social re/construction of fisheries as work. Second, in contexts such as Sri Lanka, where society is violently divided along different identity lines, especially that of ethnicity, inclusive and sustainable post-war rebuilding and meaningful community cohesion will require understanding that a) ethnic identity is socially constructed and mediated by the enactment of other identity categories; b) men and women use agentive power in accessing livelihoods, shaping and reshaping identity discourses through their livelihood activities; and c) hierarchies of power are dynamic in nature. Third, local-level legitimacies are as important as the electorally won, constitutionally accorded legitimacy of the state in resource governance. Consequently, discourses on state-building in post-war contexts need to pay careful attention to these legitimising processes, to how local-level legitimacies are shaped and reshaped, and to the influence of local-level legitimacies in strengthening or weakening state legitimacy. Fourth, continued legacies of war shape the lives of men and women. Fifth, the findings of this thesis add a granularity to the ongoing debate within post-war Sri Lanka on the different ways that social identities of men and women are (re)shaped through their access to livelihood opportunities and resources. Expanding the argument that economic institutions reshape gender at the individual, interactional and institutional levels, this thesis shows that economic institutions and activities shape the intersecting identities of men and women in complex ways, both in terms of how they see themselves and in the way they organise their social and political lives in the wider society.

    Kennisdocument rivierkreeften
    Couperus, A.S. - \ 2015
    IJmuiden : IMARES (Rapport / IMARES C190/15) - 24
    rivierkreeft - zoetwaterdieren - schaal- en schelpdierenteelt - zoetwateraquacultuur - vismethoden - vis vangen - crayfish - freshwater animals - shellfish culture - freshwater aquaculture - fishing methods - fishing
    Dit document geeft een beknopt overzicht van de status en biologie van rivierkreeften die in Nederland voorkomen. Tevens wordt korte informatie gegeven over wereldwijde visserij en kweek van rivierkreeften. Daarnaast worden verschillende aspecten belicht die een rol spelen bij het vissen op niet inheemse rivierkreeften in Nederland.
    De vormgeving van beleid in een Multi-level Governance setting - VIP Rapport : Analyse van bijeenkomsten tussen vissers en EZ over de omstreden aanlandplicht 2013, 2014 en 2015
    Trapman, B.K. ; Kraan, M.L. - \ 2015
    IJmuiden : IMARES (Rapport / IMARES C196/15) - 35
    zeevisserij - discards - vis vangen - visserijbeleid - governance - plichten - wetgeving - europa - marine fisheries - discards - fishing - fishery policy - governance - duties - legislation - europe
    Visserijlocaties van verschillende visserijen in 2013, net behulp van VMS
    Reijden, K.J. van der; Verkempynck, R. - \ 2015
    IMARES - 7
    visserij - visbestand - monitoring - vis vangen - vissersschepen - noordzee - fisheries - fishery resources - monitoring - fishing - fishing vessels - north sea
    Alle VMS-gegevens bestaan uit een locatie, snelheid en tripnummer. Deze kunnen middels het tripnummer worden gelinkt aan de logboek data. Hierdoor wordt voor elke trip bekend welk tuig gebruikt is, en wat de (geschatte) aanlandingen waren per soort. Voor elk tuig apart wordt per VMS-ping bepaald of het schip op dat moment vissende is. Dat wordt bepaald aan de hand van de snelheid. Vervolgens worden de aanlandingen verspreidt over de VMS-pings, welke als vissend zijn beoordeeld. Soms zijn er reizen waarvan wel logboeken zijn ingevuld, maar er geen VMS-data beschikbaar is. Voor dit project zijn deze reizen niet meegenomen.
    Ecosystem effects of bottom trawl fishing
    Denderen, P.D. van - \ 2015
    Wageningen University. Promotor(en): Adriaan Rijnsdorp, co-promotor(en): Tobias van Kooten. - Wageningen : Wageningen University - ISBN 9789462573468 - 182
    vis vangen - zeevisserij - boomkorvisserij - vismethoden - ecosystemen - milieueffect - visserijbeheer - benthos - soortenrijkdom - mariene ecologie - fishing - marine fisheries - beam trawling - fishing methods - ecosystems - environmental impact - fishery management - benthos - species richness - marine ecology - cum laude
    cum laude graduation
    VIP T-Line
    Marlen, B. van; Berghe, C. vanden - \ 2014
    IJmuiden : IMARES (Rapport / IMARES Wageningen UR C134/14) - 45
    vis vangen - vismethoden - vistuig - prestatie-onderzoek - nieuwe producten - innovaties - fishing - fishing methods - fishing gear - performance testing - new products - innovations
    Om een goedkoper alternatief te hebben dan de pulskor of de pulswing heeft de firma De Vries het zgn. “T - Line” vistuig o ntworpen in 2011. Hierbij zijn wekkers vervangen door over de bodem lopende trilnaalden, die tot minder weerstand en bodemcontact moeten leiden. Daarnaast is het achternet anders opgebouwd dan gewoonlijk, als een ‘broeknet’ met twee kuilen naast elkaar. Het “T-line”vistuig is in verschillende proefreizen verder ontwikkeld gedurende 2012 en 2013. Tevens zijn onderwateropnamen gemaakt door het ILVO te Oostende, België en zijn met simulaties met de DynamiT™ software van INFREMER van dit vistuig gedaan. Een vergelijking met een zusterschip ook vissend met de SumWing met normale boomkornetten laat zien, dat het T-Line vistuig een brandstofbesparing kan geven van ca. 25%. De bruto besomming bleef echter wel ongeveer 15% achter. Per liter brandstof ving de T-Line echter ca. 42% meer in aan te landen vis. Als gevolg van de onderzoek opzet zonder uitvoerige discardmonitoring kunnen er echter geen conclusies worden getrokken over de effecten van het T-Line vistuig op het discard percentage.
    Discards monitoring in the gillnet fishery for sole
    Uhlmann, S.S. - \ 2014
    IJmuiden : IMARES Wageningen UR (IMARES-report C195/13) - 15
    visserij - vis vangen - tong (vis) - vistuig - vismethoden - discards - monitoring - fisheries - fishing - dover soles - fishing gear - fishing methods - discards - monitoring
    Approximately 2-3% of the Dutch fishing quota for sole (Solea solea) is caught by a 60-vessel strong inshore fleet of gillnetters. From their home ports in IJmuiden, Scheveningen and Den Helder, these vessels fish typically with bottom-set gillnets for sole during 1 day trips between March and October. Sole caught by gillnetters is typically of good quality and reserves a niche in the market. Some of the vessels are certified with the Marine Stewardship Council (MSC) or Friends of the Sea (FOS). As a condition of these certificates, fishers self-report via logbooks during each trip the kg landings and count the number of discards by species. Under the European Data Collection Framework (DCF), gillnetters qualify to be monitored by observers. However, their deployment is often difficult due to a lack of space on board, in particular for vessels smaller than 12 m length. In 2013, for the first time, two trips for sole were accompanied by an observer from IMARES. In 2011 as part of a pilot project, an electronic monitoring system (CCTV) was installed onboard a single vessel to monitor the bycatch of harbour porpoises. In this document, data from these three sources (self-reporting, observer trips and CCTV) were used to describe landings and discard compositions. Because IMARES was only involved in setting up the protocol for the self-reporting and analysing the data, IMARES cannot guarantee the validity of the results herein
    Het voorkomen van diadrome vis in de spuikom van Kornwerderzand 2001 - 2012 en de relatie met spuidebieten
    Griffioen, A.B. ; Winter, H.V. - \ 2014
    IJmuiden : IMARES (Rapport / IMARES Wageningen UR C036/14) - 33
    zoetwaterbaaien - lozing - vis vangen - monitoring - diadrome vissen - diergedrag - vismigratie - aquatische ecologie - ijsselmeer - freshwater bays - disposal - fishing - monitoring - diadromous fishes - animal behaviour - fish migration - aquatic ecology - lake ijssel
    Het doel van deze studie is om een uitgebreide analyse uit te voeren van de fuikvangsten, die sinds 2001 worden uitgevoerd bij Kornwerderzand. Hierbij wordt ook een relatie van de fuikvangsten met de spui-debieten gelegd. Een tweede doel van deze rapportage is om een indruk te krijgen van het optreden van concentraties vis met een link naar de ingang (potentiële ingang) van de VismigratieRivier. Fuikvangsten zijn altijd een onbekende resultante van aanbod en het gedrag van vis. In 2009 heeft er door IMARES een analyse plaatsgevonden van deze fuikvangsten en de afstand tot het spuicomplex. Een relatie met de spui-debieten is hierbij buiten beschouwing gelaten. Deze rapportage geldt als een update en een uitbreiding van die analyse. De gegevens van de fuikenmonitoring en de spuidebieten zijn gebruikt om de volgende vragen te beantwoorden: - In hoeverre heeft het spui-regime bij Kornwerderzand invloed op het voorkomen van diadrome vissen in de spuikom van Kornwerderzand?; - Welke patronen in het visaanbod zijn zichtbaar met betrekking tot de locatie van de fuiken in de spuikom en specifiek ten aanzien van het spuiregime? - Is er een zogenoemd ‘naijl–effect’ in de aanwezigheid van vissen na een spui event?
    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.
    Altijd een gegarandeerde mosselzaadvangst (interview met Pauline Kamermans)
    Wolkers, H. ; Kamermans, P. - \ 2014
    WageningenWorld 2014 (2014)1. - ISSN 2210-7908 - p. 32 - 33.
    mossels - mosselteelt - schaal- en schelpdierenvisserij - vis vangen - netten - mussels - mussel culture - shellfish fisheries - fishing - nets
    Uitvinder en ondernemer Kees Groot ontwikkelde met hulp van IMARES Wageningen UR een alternatief voor de vangst van jonge mosseltjes met sleepnetten. Inmiddels wordt een derde van de oogst met deze MZI’s gevangen. Het biedt mosselvissers meer bedrijfszekerheid.
    The effects of electric pulse stimulation on cultured adult cod, continued research 2013
    Haan, D. de; Soetaert, M. ; Verschueren, B. - \ 2013
    IJmuiden : IMARES (Report / IMARES Wageningen UR C183/13) - 21
    pulsvisserij - vis vangen - vistuig - kabeljauw - beschadigingen - pulse trawling - fishing - fishing gear - cod - injuries
    In this experiment a toal of 83 adult cod were exposed, 53 specimen were exposed at 60 V and 30 specimen twice above the maximum commercially applied amplitude (120 V). In 5 cases vertebral injuries occurred of which 4 at 120 V and a single one at 60 V. When the type of stimulus is taken in account this single injury at 60 V amplitude represents an injury rate of 4.5 % of 22 exposed fish and 13% at 120 V (4 oout 30 specimen). Despite the same electrical parameters were set, none of the 21 fish exposed to the ILVO pulse generator was injured. All injuries occurred using the Delmeco TX68 pulse shape.
    Praktijknetwerk Sumwing Zuid
    Marlen, B. van; Berghe, Ch. van den - \ 2013
    IJmuiden : IMARES (Rapport / IMARES Wageningen UR C125/13) - 85
    visserij - vistuig - vis vangen - vismethoden - brandstofverbruik - boomkorvisserij - fisheries - fishing gear - fishing - fishing methods - fuel consumption - beam trawling
    De SumWing is een recente aanpassing van het conventionele boomkortuig. Het vistuig heeft geen sloffen meer en wordt op de bodem gehouden door middel van een taster. Dit levert een brandstofbesparing op. Dit nieuwe tuig is aanvankelijk ontwikkeld voor de vlakke grond in de noordelijke Noordzee. In dit project is gekeken hoe dit vistuig geschikt kan worden gemaakt voor het vissen ‘in de punten’ (d.w.z. ongelijke visgronden met zandribbels) in de zuidelijke Noordzee.
    Fishing activities on the Dogger Bank 2006-2011
    Bartelings, H. ; Hamon, K.G. ; Oostenbrugge, J.A.E. van - \ 2013
    The Hague : LEI, part of Wageningen UR (Memorandum / LEI : Research area Natural resources ) - 45
    visserij-ecologie - ruimtelijke verdeling - beschermingsgebieden - noordzee - visserij - vis vangen - fisheries ecology - spatial distribution - conservation areas - north sea - fisheries - fishing
    In 2008, the Minister of Agriculture, Nature and Food Quality notified four proposed Sites of Community In-terest (pSCIs) to the European Commission (for protection as Special Conservation Areas (SCAs) under the Habitats Directive). These areas are the Dogger Bank, Cleaver Bank, the Coastal Zone and the Vlakte van de Raan. The areas have been chosen, based on their specific habitats and ecological values. The objective of the current project is to give insight into the trends of the fishing activities of the Dutch and important foreign fleets (Belgian, German and UK) in the area of the Dogger Bank in the period 2006-2011. In the analyses attention is given to developments in effort, landings and economic value of the landings.
    Discards monitoring in the Gillnet Sole Fishery
    Quirijns, F.J. - \ 2012
    [S.l.] : S.n. - 6
    tong (vis) - visserij - zeevisserij - vis vangen - netten - discards - bijvangst - monitoring - dover soles - fisheries - marine fisheries - fishing - nets - discards - bycatch - monitoring
    The Gillnet Sole Fishery Study Group monitored discards since 2011. This document describes results from the self-sampling. No observer trips in the Dutch Sole Gillnet Fishing have taken place under the EU data collection framework (DCF). Under the DCF The Netherlands are obliged to sample ten gill net fishing trips. However, it is not specified which type of gill net fishing trips should be sampled, i.e. no target species is specified. In 2011 observers only went on board gill net trips in which cod was targeted. In 2012, up to November 2012, no observer trips were carried out in these fisheries
    Tweede jaar bedrijfssurvey van start : UK 45 en OD 1 doen wetenschappelijke trekken
    Rasenberg, M.M.M. - \ 2012
    Visserijnieuws 32 (2012)32. - ISSN 1380-5061 - p. 2 - 2.
    visstand - visbestand - vis vangen - boomkorvisserij - pulsvisserij - pleuronectiformes - wetenschappelijk onderzoek - fish stocks - fishery resources - fishing - beam trawling - pulse trawling - scientific research
    In 2012 wordt voor de tweede keer de bedrijfssurvey uitgevoerd. Twee commerciele kotters (UK 45 en OD 1) zullen tijdens de jaarlijkse boomkorsurvey (BTS) in aanvulling op de onderzoeksschepen Isis en Tridens wetenschappelijke trekken doen om een beeld te krijgen van veranderingen in de tong- en scholstand.
    Discards in de garnalenvisserij in Nederland: een overzicht
    Imares, - \ 2012
    IMARES
    garnalen - visserij - schaal- en schelpdierenvisserij - discards - bijvangst - vangstsamenstelling - vis vangen - shrimps - fisheries - shellfish fisheries - discards - bycatch - catch composition - fishing
    Deze factsheet geeft de meest recente gegevens over de discards in de garnalenvisserij weer. Daarnaast gaan we in op de recente innovaties voor het verminderen van discards en voor het verbeteren van de discardoverleving.
    Seminar: Fish traps in the North Sea : a viable option?
    Vos, B.I. de - \ 2011
    Kenniskringen Visserij
    zeevisserij - visserij - vis vangen - vistuig - vallen - noordzee - marine fisheries - fisheries - fishing - fishing gear - traps - north sea
    In several countries fishers use fish traps. In the Netherlands not many fishers have experience in using this kind of gear. The seminar aimed to stimulate exchange of international experiences and to inform Dutch fishermen (small scale, set net and rod & line fishermen) about this kind of gear. It was supposed to give an answer to the question whether fishing with fish traps is a viable option for Dutch fishers fishing in the North Sea. Finally, ideas on how to move forward should be generated.
    Discards monitoring in the Gillnet Sole Fishery
    Quirijns, F.J. ; Couperus, A.S. ; Helmond, A.T.M. van - \ 2011
    [S.l.] : S.n. - 12
    tong (vis) - visserij - zeevisserij - vis vangen - netten - discards - bijvangst - monitoring - dover soles - fisheries - marine fisheries - fishing - nets - discards - bycatch - monitoring
    The Gillnet Sole Fishery Study Group started discards monitoring. Data were supposed to be collected in three different ways: Self-sampling, catch monitoring by means of onboard cameras (CCTV) and monitoring under the Data Collection Regulation.
    Aalvissers aan de slag met eigen toekomst
    Zaalmink, W. ; Cooten, W. van; Dvortsin, L. ; Hoop, J.G. de; Meer, M. van der; Quist, C. ; Splinter, G.M. - \ 2011
    Den Haag : LEI, onderdeel Wageningen UR (Rapport / LEI : Onderzoeksveld Sector en ondernemerschap ) - ISBN 9789086155378 - 67
    european eels - palingen - vissers - ondernemerschap - innovaties - visserijbeleid - vis vangen - duurzaamheid (sustainability) - nederland - european eels - eels - fishermen - entrepreneurship - innovations - fishery policy - fishing - sustainability - netherlands
    Aalvissers verleggen hun activiteiten naar productverwaarding, door zelf meer vis te verwerken en door meer aandacht te besteden aan afzetkanalen dicht bij consument en horeca. European eels
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