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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    Atlantic mackerel and Horse mackerel egg survey 2016: Dutch participation on board FV Atlantic Lady: May
    Damme, C.J.G. van - \ 2016
    IMARES (Report / IMARES C077/16) - 30
    mackerels - trachurus trachurus - scomber scombrus - fish eggs - censuses - surveys - makrelen - trachurus trachurus - scomber scombrus - visseneieren - tellingen - karteringen
    From 10 till 25 May 2016 IMARES carried out a mackerel and horse mackerel egg survey on board the FV Atlantic Lady. This survey was part of the international mackerel and horse mackerel egg survey coordinated by ICES. The Redersvereniging voor de Zeevisserij (RVZ) asked IMARES to carry out this survey. Numbers of mackerel eggs in the samples were low, lower compared to previous surveys. Most mackerel eggs were found along the 200m depth contour of the continental slope. Most of the adult mackerel had running or newly developing (in between batches) gonads. Few mackerel had gonads which were spent. Numbers of horse mackerel eggs were extremely low. A few horse mackerel eggs were found along the 200m depth contour on the most southern transects. Adult horse mackerel caught had running or newly developing gonads.
    Opportunistically recorded acoustic data support Northeast Atlantic mackerel expansion theory
    Kooij, Jeroen vander; Fassler, S.M.M. ; Stephens, D. ; Readdy, Lisa ; Scott, B. ; Roel, Beatriz - \ 2016
    ICES Journal of Marine Science 73 (2016)4. - ISSN 1054-3139 - p. 1115 - 1126.
    fisheries acoustics - mackerel - North sea - scomber scombrus
    Fisheries independent monitoring of widely distributed pelagic fish species which conduct large seasonal migrations is logistically complex and expensive.One of the commercially most important examples of such a species in the Northeast Atlantic Ocean is mackerel for which up to recently only an international triennial egg survey contributed to the stock assessment. In this study, we explore whether fisheries acoustic data, recorded opportunistically during the English component of the North Sea International Bottom Trawl Survey, can contribute to an improved understanding of mackerel distribution and provide supplementary data to existing dedicated monitoring surveys. Using a previously published multifrequency acoustic mackerel detection algorithm, we extracted the distribution and abundance of schooling mackerel for the whole of the North Sea during August and September between 2007 and 2013. The spatio-temporal coverage of this unique dataset is of particular interest because it includes part of the unsurveyed summer mackerel feeding grounds in the northern North Sea. Recent increases in landings in Icelandic waters during this season suggested that changes have occurred in the mackerel feeding distribution. Thus far it is poorly understood whether these changes are due to a shift, i.e. mackerel moving away from their traditional feeding grounds in the northern North Sea and southern Norwegian Sea, or whether the species’
    distribution has expanded. We therefore explored whether acoustically derived biomass of schooling mackerel declined in the northern North Sea during the study period, which would suggest a shift in mackerel distribution rather than an expansion. The results of this study show that in the North Sea, schooling mackerel abundance has increased and that its distribution in this area has not changed over this period. Both of these findings provide, to our knowledge, the first evidence in support of the hypothesis that mackerel have expanded their distribution rather than moved away.
    Feasibility study combining North Sea and Atlantic mackerel egg surveys
    Damme, C.J.G. van; Thorsen, A. ; Brunel, T.P.A. ; Nash, R.D.M. - \ 2015
    IJmuiden : IMARES (Report / IMARES Wageningen UR C124/15) - 23
    scomber scombrus - makrelen - kuitschieten - visseneieren - visserij - noordzee - scomber scombrus - mackerels - spawning - fish eggs - fisheries - north sea
    Mackerel Scomber scombrus is a widely distributed species with a high economic and ecological importance. The North East Atlantic mackerel comprises three different spawning components. The Spawning Stock Biomass (SSB) index from the mackerel egg surveys is used as a fisheries independent tuning index for the mackerel assessment. The North Sea mackerel triennial egg survey is carried out in the year after the egg survey of the Western and Southern spawning components. Due to this time lag currently the North Sea egg survey SSB index is not used directly in the mackerel assessment. However, the egg survey is the only available information on the mackerel spawning component in the North Sea. Can the North Sea mackerel egg survey index be incorporated in the mackerel assessment and what is the impact of the incorporation of this index? Could the North Sea and Atlantic egg surveys be carried out in the same sampling year?
    Mackerel winter spawning surveys 2014 - 2015 December survey
    Damme, C.J.G. van; O'Hea, B. - \ 2015
    IJmuiden : IMARES (Report / IMARES Wageningen UR C043/15) - 12
    scomber scombrus - makrelen - kuitschieten - voortplanting - visbestand - pelagische visserij - mariene ecologie - monitoring - scomber scombrus - mackerels - spawning - reproduction - fishery resources - pelagic fishery - marine ecology - monitoring
    In recent years the western Atlantic mackerel stock has expanded, resulting in an earlier start of spawning and earlier occurrence of the mackerel peak of spawning. In 2014 and 2015, mackerel winter spawning surveys have been conducted to determine the start date of mackerel spawning in the western area. During the surveys both plankton sampling and trawl hauls are carried out. This report contains the results of the December 2014 survey, carried out on board the Nida.
    Mackerel winter spawning surveys 2014 - 2015 January survey: Survey report
    Damme, C.J.G. van; Holst, G. - \ 2015
    IJmuiden : IMARES (Report / IMARES Wageningen UR C014/15) - 12
    scomber scombrus - makrelen - kuitschieten - voortplanting - visbestand - pelagische visserij - mariene ecologie - monitoring - scomber scombrus - mackerels - spawning - reproduction - fishery resources - pelagic fishery - marine ecology - monitoring
    In recent years the western Atlantic mackerel stock has expanded, resulting in an earlier start of spawning and earlier occurrence of the mackerel peak of spawning. In 2014 and 2015, mackerel winter spawning surveys have been conducted to determine the start date of mackerel spawning in the western area. During the surveys both plankton sampling and trawl hauls are carried out. This report contains the results of the January 2015 survey, carried out on board the CETON S205.
    North Sea mackerel egg survey 2014
    Damme, C.J.G. van; Bakker, C. - \ 2014
    IJmuiden : IMARES (Report / IMARES Wageningen UR C106/14) - 12
    visbestand - scomber scombrus - voortplanting - monitoring - noordzee - fishery resources - scomber scombrus - reproduction - monitoring - north sea
    IMARES was the only institute to carry out the North Sea mackerel egg survey and planned to cover the North Sea mackerel spawning area and season in four survey weeks.
    Noordzee makreel eisurvey 2008: reisverslag en resultaten
    Damme, C.J.G. van - \ 2008
    IJmuiden : IMARES (Rapport / Wageningen IMARES 08.018) - 27
    visserij - visbestand - scomber scombrus - visserij-ecologie - visstand - fisheries - fishery resources - scomber scombrus - fisheries ecology - fish stocks
    Deze makreel eisurvey wordt samen met Noorwegen uitgevoerd en heeft als doel een schatting van de makreeleiproductie te geven in de Noordzee, alsmede voor een visserij-onafhankelijke bestandsschatting. De verspreiding van de makreeleieren laat hetzelfde beeld zien als in 2005. De aantallen door Nederland gevangen makreeleieren zijn lager in vergelijking met de voorgaande survey in 2005
    Monitoring of incidental catches of cetaceans by Dutch pelagic trawlers, July 2004 - December 2005
    Couperus, A.S. - \ 2006
    IJmuiden : CVO (CVO report 06.006) - 24
    visserij - vangstsamenstelling - scomber scombrus - trachurus trachurus - dolfijnen - monitoring - pelagische visserij - visvangsten - fisheries - catch composition - scomber scombrus - trachurus trachurus - dolphins - monitoring - pelagic fishery - fish catches
    Dit rapport bevat de resultaten van het doorlopende waarnemersprogramma naar de bijvangst van dolfijnen in de Nederlandse pelagische visserij onder EU Verordening 812/2004 in de periode juni 2004 tot en met december 2005. In de jaren 2004 en 2005 zijn waarnemingen uitgevoerd van in totaal 274 trekken, uitgevoerd tijdens 8 visreizen van in totaal 122 dagen. Er werden twee bijvangst incidenten gerapporteerd tijdens een reis op horsmakreel en makreel. Hierbij werden respectievelijk een vrouwelijke gewone dolfijn en twee mannelijke gewone dolfijnen gevangen
    Catch composition of the Dutch pelagic fleet in the Mauritanian Exclusive Economic Zone during the year 2003: results of the scientific observer program
    Hofstede, R. ter - \ 2004
    IJmuiden : RIVO (Report / RIVO-Netherlands Institute for Fisheries Research C054/04) - 58
    pelagische visserij - sardinella - sardines - sardina pilchardus - makrelen - scomber scombrus - visserij - discards - bijvangst - vangstsamenstelling - mauritanië - pelagic fishery - sardinella - sardines - sardina pilchardus - mackerels - scomber scombrus - fisheries - discards - bycatch - catch composition - mauritania
    This report describes the total catches of the Dutch pelagic fleet in the Mauritanian Exclusive Economic Zone during the year 2003. Data have been obtained by the 'Scientific Observer Program', which monitors the catch (both landings and discards) of the Dutch fishery for small pelagics in Mauritania. The Dutch pelagic fleet in Mauritania focuses mainly on the group of sardinella (Sardinella aurita and Sardinella maderensis). Additional target species are pilchard (Sardina pilchardus) and chub mackerel (Scomber japonicus). The landings by weight in 2003 consisted for 95% of these 4 species, S. aurita being the dominant species (58% of the landings). In the year 2003, 91.6% of the estimated total catch by weight has been landed and 8.4% was discarded, which is reasonably comparable to previous years (1999-2002). The total estimated catch of the Dutch fleet has remained about the same, approximately 170 thousand tons per year. The dominance of S. aurita in the total estimated catch has gradually diminished throughout the years 1999-2003. Pilchard (S. pilchardus) and chub mackerel (S. japonicus) gradually replaced the round sardinella in the catches of the Dutch fleet since 1999. As in previous years, the catch of round sardinella mainly took place during the summer from June to September and the pilchard S. pilchardus appeared to be the dominant species in wintertime. The number of observer days has reduced slightly throughout the period 1999-2003. Nevertheless, the sampling method, both for small pelagic species and by-catch of pelagic megafauna, has improved in quality and quantity, which resulted in high quality data. The extension of the observers’ dataset in 2003 with a fifth year in a row enlarged the possibilities to use this database for detailed research on the biology and ecology of small pelagic species in the Mauritanian Exclusive Economic Zone, which is therefore highly recommended to be performed in the near future.
    Directive breve pour la collection des estomacs de poisson en mer, edition francais
    Hofstede, R. ter - \ 2003
    IJmuiden : RIVO (Internal RIVO report 03.016) - 20
    sardinella - sardines - sardina pilchardus - makrelen - scomber scombrus - carangidae - pelagische visserij - visserij - visbestand - bemonsteren - europese unie - mauritanië - sardinella - sardines - sardina pilchardus - mackerels - scomber scombrus - carangidae - pelagic fishery - fisheries - fishery resources - sampling - european union - mauritania
    Deze handleiding dient als leidraad voor medewerkers aan het maagbemonstering programma aan boord van Europese pelagische trawlers in Mauritanië waarvan de visserij gericht is op kleine pelagische soorten zoals sardinella, makreel, horsmakreel en sardien. Het maagbemonstering programma is gestart in maart 2002 en maakt onderdeel uit van het samenwerkingsproject ‘Petits Pelagiques’ tussen het Nederlands Instituut voor Visserij Onderzoek (RIVO) en het Mauritaanse Instituut voor Oceanografisch en Visserij Onderzoek (IMROP). Dit project is begin 1998 gestart en is bedoeld om de Mauritaanse kennis ten aanzien van onderzoek aan pelagische visbestanden te versterken, waarbij de nadruk ligt op de doelsoort Sardinella aurita. De handleiding beschrijft de methodiek voor het bemonsteren van vismagen op zee, speciaal ontwikkelt voor het werk in Mauritanië, waarbij de aandacht met name gericht is op potentiële predatoren van Sardinella aurita.
    Biological ensilage of fish : optimization of stability, safety and functionality
    Enes Dapkevicius, M.L.N. - \ 2002
    Wageningen University. Promotor(en): F.M. Rombouts; M.J.R. Nout; J.H. Houben. - S.l. : [s.n.] - ISBN 9789058085702 - 170
    voedselmicrobiologie - kuilvoerbereiding - micromestistius poutassou - trachurus - scomber scombrus - biogene aminen - lipiden - eiwitafbraak - food microbiology - silage making - micromestistius poutassou - trachurus - scomber scombrus - biogenic amines - lipids - protein degradation
    This thesis deals with stability, safety, and functionality aspects of biological fish silage (BFS) obtained by lactic acid fermentation. BFS may provide an economically viable, environment friendly way of upgrading fish waste.

    BFS has been found advantageous when compared to the so-called acid process, since it yielded lower levels of peroxides in the silage oil and led to lower non-protein nitrogen values. Fermentation by lactic acid bacteria (LAB) was shown to efficiently inhibit pathogens such as L. monocytogenes and E. coli O157:H7 as well as some spoilage microorganisms. Histamine degradation by some of the most promising available LAB strains was also tested, as an innovative means of ensuring low levels of this amine in the fermented product. Several potential starter strains were found to degrade histamine as single strain cultures and could find application in fish silage and other fish products in which histamine accumulation might pose a certain risk.

    Temperatures of 35 - 37°C were regarded as most suitable from the point of view of starter growth and acidification. Strains with a short acidification lag time, such as Lb. plantarum 009, or with very fast growth and good antibacterial properties, such as Lb. curvatus 15.35, are most suitable.

    Sodium chloride inhibited growth of biogenic amine producing bacteria and additionally decreased non-protein nitrogen and total volatile basic nitrogen values in BFS. Potassium sorbate was shown to inhibit growth and/or acidification by potential starter lactic acid bacteria.

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