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.

    We have a manual that explains all the features 

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    We will mail you new results for this query: keywords==scophthalmus rhombus
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Waardekaarten Ridens & Recifs
Machiels, M.A.M. - \ 2015
IJmuiden : IMARES (Rapport / IMARES Wageningen UR C073/15) - 18
kaarten (charts) - kaarten - frankrijk - kustwateren - vergelijkend onderzoek - opbrengsten - visvangsten - schol - scophthalmus rhombus - tarbot - charts - maps - france - coastal water - comparative research - yields - fish catches - plaice - turbot
In dit rapport beantwoorden wordt een offerteaanvraag van de Nederlandse Vissersbond van 18 februari 2015 beantwoord waarin zij vroegen om waardekaarten en tabellen van de N2000 gebieden Ridens & Récifs voor de Franse kust.
Industrial survey for associated species: Results of a pilot-year
Reijden, K.J. van der; Poos, J.J. ; Chen, C. ; Os-Koomen, E. van; Dijkman Dulkes, H.J.A. ; Pasterkamp, T.L. ; Rasenberg, M.M.M. - \ 2015
IJmuiden : IMARES (Report / IMARES Wageningen UR C036/15) - 25
visserijbeheer - visbestand - beoordeling - vergelijkend onderzoek - wetenschappelijk onderzoek - visserijbeleid - eu regelingen - noordzee - tarbot - scophthalmus rhombus - pleuronectiformes - boomkorvisserij - fishery management - fishery resources - assessment - comparative research - scientific research - fishery policy - eu regulations - north sea - turbot - beam trawling
To increase scientific knowledge and stimulate discussion on management of data-limited species, Ekofish Group B.V., the North Sea Foundation (NSF) and IMARES started a research project. This project consisted of two phases. In the first phase, IMARES and NSF performed a literature study on the constrains in management and biological knowledge for species selected by Ekofish. After phase one, Ekofish Group B.V. requested IMARES to set up an industrial survey to gather more information on turbot, brill and lemon sole. A pilot-survey was designed and performed for these species to test whether an industrial survey is feasible and valuable for biological knowledge and if so, how this survey should be designed. To test the design of the survey, research will be done on the haul duration and mesh size. To examine the added value of the pilot survey, results are compared with the BTS. In this report, the results of this pilot survey are presented and answer will be given to the following research question: “Is an industrial survey for turbot, bill and lemon sole feasible and does it increase knowledge with respect to scientific surveys?”
Data evaluation of data limited stocks: Horse mackerel, Seabass, Greater Silver Smelt, Turbot and Brill
Hammen, T. van der; Poos, J.J. ; Overzee, H.M.J. van; Heessen, H.J.L. ; Rijnsdorp, A.D. - \ 2014
IJmuiden : IMARES (Report / IMARES Wageningen UR C166/13) - 84
trachurus trachurus - osmerus - zeebaars - tarbot - scophthalmus rhombus - visbestand - pleuronectiformes - visstand - visserij - sea bass - turbot - fishery resources - fish stocks - fisheries
Several commercially important fish stocks are classified by ICES (International Council for the Exploration of the Sea) as “data limited” stocks, which are stocks for which the data are insufficient to perform a full analytical assessment and forecast. In this report available data and literature on North Sea horse mackerel, greater silver smelt, seabass, turbot and brill are analysed. The data in this report may be used in future for catch advice by ICES.
Afzetmarkt van tong en andere vissoorten van staandwantvissers : uitwerking van een kennisvraag voor de Kenniskring Staandwantvisserij op tong
Vos, B.I. de - \ 2011
Den Haag : LEI Wageningen UR - 11
tong (vis) - kabeljauw - limanda limanda - tarbot - scophthalmus rhombus - zeevisserij - bijvangst - duurzaamheid (sustainability) - certificering - visbestand - marketing - dover soles - cod - turbot - marine fisheries - bycatch - sustainability - certification - fishery resources
Tong van staandwantvissers is nu ruim 1,5 jaar gecertificeerd met het MSC-keurmerk. Naast tong wordt er ook kabeljauw, schar, tarbot en griet gevangen door deze vissers. Vissers willen bekijken of de bij-soorten ook onder een duurzaamheidslabel verkocht kunnen worden. De vraag is echter welk label hiervoor het meest geschikt zou zijn. Een kanttekening bij MSC is bijvoorbeeld dat voor elke vissoort apart een certificeringstraject doorlopen moet worden. Dit is erg kostbaar en tijdrovend. Bovendien komt kabeljauw niet in aanmerking vanwege de onder druk staande bestanden. Om klantgericht te werken is het belangrijk uit te zoeken wat de afzetmarkt is van genoemde vissoorten en welk label daar het beste past. Idealiter zou de gehele vangst onder een label verkocht moeten worden. Vissers hebben de voorkeur om de MSC-certificering voor tong te behouden, omdat zij op dit moment de enige in Nederland zijn die het certificaat voor tong hebben en hier ook investeringen voor zijn gemaakt.
Data availability for the evaluation of stock status of species without catch advice: Case study: turbot (Psetta maxima) and Brill (Scophthalmus rhombus)
Hammen, T. van der; Poos, J.J. ; Quirijns, F.J. - \ 2011
IJmuiden : IMARES (Rapport / IMARES Wageningen UR C101/11) - 35
visstand - tarbot - scophthalmus rhombus - gegevensanalyse - gegevens verzamelen - noordzee - fish stocks - turbot - data analysis - data collection - north sea
Several commercially important demersal fish stocks for the North Sea fisheries are classified as “category 11” in the light of the EU policy paper on fisheries management (17 May 2010, COM(2010) 241). For stocks in this category, there is no STECF (Scientific, technical and economic committee for fisheries ) management advice, due to the unknown status of the stocks. The reason for this is that the data and information available to perform analytical stock assessments are highly uncertain or lacking. This document describes existing data and options for collecting new data for the evaluation of the state of category 11 stocks. We focus on turbot and brill in the North Sea. Existing data from logbooks and the market sampling program can be used to estimate LPUE series used in age-based stock assessment methods, similar to other commercially important flatfish species such as plaice and sole. Landings Per Unit of Effort (LPUE) data of the Dutch beam trawl fleet > 221 kW were standardised for engine power and corrected for targeting behaviour as described below and graphically shown in Figure 3.2.1. The methods are similar to those used to analyse commercial LPUE data for North Sea plaice, described in Quirijns and Poos (2010). Landing rates (LPUE) by market category were calculated for the period 2002-2010. The corrected LPUE series indicate an increase in commercial LPUE for both species during the period 2002-2006. For turbot, the LPUE stays stable in the first five years, increases between 2006 and 2008, and decreases afterwards. The increase in brill LPUE is larger, and occurs throughout the study period. Compared to other commercially important flatfish species relatively few brill and turbot market samples are taken. This reduces the ability to track the cohorts in the LPUE series of the older ages which is a prerequisite for reliable stock assessment estimates. Also, the time series currently spans only 9 years. Collection of additional data may therefore be desirable. Expanding the BTS survey will provide industry independent data and would therefore give easily interpretable results. The option of an industry survey is also a good option if the survey is already being executed for sole and plaice. However, both options are costly. Therefore, the option of increasing the samples of turbot and brill at the auction is relatively easy and relatively inexpensive and therefore at present the most promising. The methods used for this document will not per definition be applicable for all category 11 species. For dab, flounder, lemon sole and tub gurnard, samples at the auctions are taken to collect biological data. For these species it may be possible to raise the data in a similar way as was done in this report to estimate the age composition of the stock. For other species (witch flounder, horse mackerel, silver smelt, red mullet and squid) there is no market sampling. For these species, other methods will have to be developed.
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