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
University. Promotor(en): Alfons Oude Lansink; Simon Bush, co-promotor(en): Paul 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.

Overview of the international fishing activities on the Dogger Bank : update with Dutch, British, Danish, German, Belgian, Swedish and French data for 2010-2015
Hamon, Katell G. ; Hintzen, Niels T. ; Oostenbrugge, Hans J.A.E. - \ 2017
Wageningen : Wageningen Economic Research (Wageningen Economic Research memorandum 2017-050) - 35
fisheries - marine animals - fishery management - north sea - population dynamics - europe - cost benefit analysis - visserij - zeedieren - visserijbeheer - noordzee - populatiedynamica - europa - kosten-batenanalyse
This report is an update of the data and analysis on the value of the fishing activities of the Dutch, British, Danish, German, Belgian, Swedish and French fishing fleets on the proposed closed areas on the Dogger Bank. The effort, value and landings are presented for a five-year period (2010-2015) and show large variations over the last years, driven mainly by fishing opportunities for plaice for the Dutch and British fleets and sandeel for the Danish and German fleets.
Inktvis luistert mogelijk naar vijanden
Ramaker, R. ; Samson, J.E. - \ 2014
Resource: weekblad voor Wageningen UR 9 (2014)8. - ISSN 1874-3625 - p. 8 - 8.
zeedieren - diergedrag - gehoorvermindering - geluidshinder - mariene gebieden - marine animals - animal behaviour - hearing impairment - noise pollution - marine areas
De zeekat, een inktvis die voor onze kust leeft, blijkt een goed gehoor te hebben. Mogelijk luisteren de dieren hiermee of ze vijanden horen aankomen. Dit blijkt uit geluidtesten die de Wageningse biologiestudent Julia Samson uitvoerde. Ze schrijft erover in the Journal of Experimental Biology. De laatste jaren is er steeds meer aandacht voor ‘geluidsoverlast’ in zee.
Report of the Workshop on International Harmonisation of Approaches to Define Underwater Noise Exposure Criteria (Budapest, Hungary 17th August 2013)
Lucke, K. ; Winter, H.V. ; Lam, F.P. ; Scowcroft, G. ; Hawkins, A. ; Popper, A.N. - \ 2013
Den Helder : IMARES (Report / IMARES Wageningen UR C197/13) - 40
geluid - blootstelling - zeedieren - geluidshinder - onderwaterakoestiek - regelingen - normen - noise - exposure - marine animals - noise pollution - underwater acoustics - regulations - standards
The potential negative effects of high levels of underwater noise on marine life have been identified and acknowledged, and this issue has been incorporated into various international agreements over the past decade. Several countries have already issued regulations to limit the incidence and level of anthropogenic noise in the oceans. The development of regulations on noise exposure in marine environments has to date focused on two groups, marine mammals and, to a lesser extent, fishes. Nevertheless, our understanding of the complexity of acoustic and behavioural effects is improving, and it might be possible to develop existing noise-exposure criteria with scientific knowledge evolving. More importantly, new regulations, or at least the approaches taken toward regulations, could be internationally harmonised to provide better protection for marine fauna.
Elusive marine mammals explored : charting under-recorded areas to 160699 and distribution of cetaceans using multi-method approaches and platforms of opportunity
Boer, M.N. de - \ 2013
University. Promotor(en): Peter Reijnders, co-promotor(en): Marten Scheffer. - Wageningen : Wageningen UR - ISBN 9789461737168 - 282
cetacea - zeezoogdieren - zeedieren - geografische verdeling - methodologie - dierecologie - aquatische ecologie - gegevens verzamelen - zoögeografie - marine mammals - marine animals - geographical distribution - methodology - animal ecology - aquatic ecology - data collection - zoogeography
Evaluatierapport 5 Ecotoxicologieprojecten, cyclus 2012 - 2013
Hoek-van Nieuwenhuizen, M. van - \ 2013
IJmuiden : IMARES (Rapport / IMARES Wageningen UR C114/13) - 16
ecotoxicologie - mariene ecologie - zeedieren - zoetwaterdieren - ecotoxicology - marine ecology - marine animals - freshwater animals
Op 15 maart 2013 heeft volgens opdracht een evaluatiegesprek plaatsgevonden tussen opdrachtgever en opdrachtnemer over de uitgevoerde 5 Ecotoxicologieprojecten, monitoringcyclus 2012-2013. Dit rapport is een verslag van de besproken onderwerpen tijdens het evaluatiegesprek.
Is the metapopulation concept applicable to the North Sea?
Held, M.E. den - \ 2009
Wageningen : Alterra (Alterra-rapport 1928) - 60
mariene ecologie - marien milieu - mariene gebieden - kustgebieden - habitatselectie - populatiedynamica - zeedieren - noordzee - zeehonden - krabben (schaaldieren) - kabeljauw - gadus morhua - cancer pagurus - halichoerus grypus - verspreiding - metapopulaties - marine ecology - marine environment - marine areas - coastal areas - habitat selection - population dynamics - marine animals - north sea - seals - crabs - cod - dispersal - metapopulations
The metapopulation concept could provide an additional way of designating areas for protective measures in the North Sea, by delineating habitat preferences and population dynamics. The current study looks into the applicability of the metapopulation concept to the North Sea underwater environment. It also seeks out species in the North Sea that could possibly be suitable metapopulations for study. The North Sea clearly is a heterogeneous environment, but habitat characteristics, like substratum type, tend to be wide ranged and without obvious physical barriers. Processes and structures in the seascape are mainly known on a rough scale, and even at that level, the available knowledge is only an interpretation from data. The same lack of knowledge is a bottleneck in defining connectivity among subpopulations, as dispersal capabilities are unknown for the majority of marine species. The species that seems most suitable for study in a metapopulation model in this test is the grey seal. Additionally, edible crab and cod emerged as species for potential use in a metapopulation model. Neither inhabit a discrete habitat patch, but both are known to have a strategy to ensure that their offspring recruits into their own population. For species that at first seemed to suitable because they have a discrete underwater habitat patch, insufficient knowledge was available to apply the theory further.
Plastic afvalberg in oceaan
Lindeboom, H.J. ; Verdaat, J.P. - \ 2008
Wageningen Marine Research
kunststoffen - afval - verontreiniging - oceanen - grote oceaan - noordzee - zeedieren - plastics - wastes - pollution - oceans - pacific ocean - north sea - marine animals
Plastic flessen, tassen, speelgoed, en industrieel afval. Het komt allemaal in zee en onze oceanen terecht en door stroming uiteindelijk naar de Stille Oceaan. Tien jaar geleden werd een afvalberg temidden van de grote wervelstroom ontdekt met een omvang vergelijkbaar als die van Frankrijk en Spanje tezamen. Heel langzaam vergaat het afval tot een plastic brij van miniscuul kleine snippers. Volgens deskundigen van o.a. Wageningen IMARES kunnen er meer van dit soort plekken bestaan in onze oceanen, maar dit is tot op heden nooit onderzocht. Kan zo'n afvalberg ook in de Noordzee ontstaan? Komt het in de magen van dieren als zeevissen, zeezoogdieren en zeevogels? In een Netwerk reportage, uitgezonden op 4 augustus 2008, geven wetenschappers van Wageningen IMARES antwoord op deze vragen.
Species composition, diversity, biomass and production of the benthic invertebrate community of the North Sea
Greenstreet, S.P.R. ; Robinson, L. ; Reiss, H. ; Craeymeersch, J.A.M. ; Callaway, R. ; Goffin, A. ; Jorgensen, L. ; Robertson, M. ; Kroncke, I. ; Boois, I.J. de - \ 2007
Aberdeen : Fisheries Research Services Marine Laboratory (Fisheries research services collaborative report no. 10/07) - 65
zeedieren - mariene ecologie - soortendiversiteit - biomassa - ongewervelde dieren - noordzee - marine animals - marine ecology - species diversity - biomass - invertebrates - north sea
Review of theoretical community ecology: implications for marine communities
Greenstreet, S.P.R. ; Robinson, L. ; Reiss, H. ; Kroncke, I. ; Callaway, R. ; Snelgrove, P. ; Costello, M. ; Bergmann, M. ; Hiddink, J. ; Fraser, H. ; Craeymeersch, J.A.M. - \ 2007
Aberdeen : Fisheries Research Services Marine Laboratory (Fish. Res. Serv. Collaborative Report 08/07) - 127
mariene ecologie - zeedieren - marien milieu - ecologie - mariene biologie - marine ecology - marine animals - marine environment - ecology - marine biology
Species composition, diversity, biomass and production of the demersal fish community of the North Sea
Greenstreet, S.P.R. ; Fraser, H. ; Piet, G.J. ; Robinson, L. ; Callaway, R. ; Reiss, H. ; Ehrich, S. ; Kroncke, I. ; Craeymeersch, J.A.M. - \ 2007
Aberdeen : Fisheries Research Services Marine Laboratory (Fisheries research services collaborative report no. 07/07) - 94
vissen - soortendiversiteit - zeedieren - noordzee - diergemeenschappen - demersale vissen - demersale visserij - fishes - species diversity - marine animals - north sea - animal communities - demersal fishes - demersal fisheries
Methodology for the combined sampling of marine groundfish and benthic invertebrate communities
Callaway, R. ; Robinson, L. ; Greenstreet, S.P.R. ; Reiss, H. ; Fraser, H. ; Kroncke, I. ; Craeymeersch, J.A.M. ; Boois, I.J. de - \ 2007
Aberdeen : Fisheries Research Services Marine Laboratory (Fish. Res. Serv. Collaborative Report 11/07) - 23
zeedieren - vissen - ongewervelde dieren - methodologie - bemonsteren - visserij - diergemeenschappen - marine animals - fishes - invertebrates - methodology - sampling - fisheries - animal communities
Managing fisheries to conserve North Sea groundfish and benthic invertebrate species diversity
Greenstreet, S.P.R. ; Robinson, L. ; Callaway, R. ; Reiss, H. ; Ehrich, S. ; Piet, G.J. ; Kroncke, I. ; Craeymeersch, J.A.M. - \ 2007
Aberdeen : Fisheries Research Services Marine Laboratory (Fisheries research services collaborative report no. 05/07) - 136
visserij - vissen - soortendiversiteit - zeevissen - zeedieren - natuurbescherming - noordzee - fisheries - fishes - species diversity - marine fishes - marine animals - nature conservation - north sea
Concerns over man’s impact on the environment and ecosystems of the world have resulted in a shift in emphasis in the management of marine natural resources. Consequently, an ecosystem approach to management (EAM) is in the process of being developed and implemented for the North Sea
Datarapportage Nulmeting Maasvlakte 2
Kaag, K. ; Escaravage, V. - \ 2007
Den Helder : IMARES (Rapport / Wageningen IMARES nr. C026/07) - 69
benthos - schaaldieren - zeedieren - mariene ecologie - biodiversiteit - milieueffect - industrieterreinen - nederland - noordzee - mijnbouw - zand - zuid-holland - rijnmondgebied - grondverzet - shellfish - marine animals - marine ecology - biodiversity - environmental impact - industrial sites - netherlands - north sea - mining - sand - earth moving
Mogelijke effecten van zandwinning op bodemfauna. Ten behoeve van de aanleg van de Tweede Maasvlakte zal zand gewonnen worden uit de Noordzee. Om te kunnen bepalen in hoeverre deze werkzaamheden van invloed zijn op de bodemfauna is onderzoek uitgevoerd naar de structuur en samenstelling van de bodemfaunagemeenschappen in het zandwingebied, de directe omgeving ervan en niet-beïnvloede referentiegebieden. De meetpunten bevinden zich voor de kust.
Ruimtelijke verschillen en temporele fluctuaties in het voorkomen van een aantal schelpdieren in de Voordelta
Craeymeersch, J.A.M. ; Wijsman, J.W.M. - \ 2006
IJmuiden : IMARES (Rapport / Wageningen IMARES nr. C013/06) - 27
schaaldieren - inventarisaties - zeedieren - noordzee - havens - natuurcompensatie - voordelta - zeereservaten - shellfish - inventories - marine animals - north sea - harbours - nature compensation - marine protected areas
In de Voordelta wordt een zeereservaat ontwikkeld als compensatie voor het verlies aan natuur door de aanleg van de tweede maasvlakte. gepland is, het gebied waar de landaanwinning zal gebeuren, en twee referentiegebieden. In voorliggend rapport zijn ten behoeve van een evaluatie van de nulmetingen gegevens uit het verleden (1993-2004) geanalyseerd. De studie is gericht op potentiële voedselbronnen (schelpdieren) voor zee-eenden. Het voornaamste doel is om inzicht te verkrijgen in ruimtelijke en temporele gelijkenissen en verschillen tussen de referentiegebieden en gebieden in het zeereservaat
Vreemde snuiten aan de Nederlandse kust
Reijnders, P.J.H. ; Brasseur, S.M.J.M. - \ 2003
Zoogdier 14 (2003)4. - ISSN 0925-1006 - p. 5 - 10.
zeedieren - phoca vitulina - zeehonden - populatiedynamica - odobenidae - zoögeografie - noordzee - marine animals - seals - population dynamics - zoogeography - north sea
Dit artikel gaat specifiek in op zeehonden en walrussen. Daarbij wordt voor de dwaalgasten eerst het normale verspreidingsgebied beschreven en worden de aantallen die de laatste 15 jaar aan de kust van Nederland zijn aangetroffen vermeld. Tevens wordt ingegaan op mogelijke effecten van klimaatsverandering
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