143 research outputs found
Small scale, big deal: Sampling catches from European small-scale fisheries.
Small-scale fleets (SSF) are important components of many ICES fisheries and are receiving growing attention within the CFP-reform and Marine Spatial Planning initiatives. In order to assess the importance of SSF within Europe, 2015 ICES WGCATCH compiled descriptions and data (effort, catch and value) of SSF fishing in EU waters, using 2012 as reference year and categorizing fleets by vessel length. The compiled information covered 17 countries describing a range of scenarios, spanning from the Baltic Sea to the Mediterranean. The <10m and 10–12m vessels were ranked highest in importance in nearly all countries in terms of number of vessels and employment. They were generally involved in multi-gear and multi-species fisheries developing seasonal or part-time activities into coastal areas with generally more sensitive habitats as nursery grounds or spawning aggregations. SSF were also found to be important for several fisheries in terms of effort, value and landings, and to represent a significant share of some TAC-quota or catches of regulated species, even though their landings may be under-reported. Group members also described the way SSF are sampled and estimated in their countries. The wide diversity in methodologies used to sample and estimate the impacts of SSF creates challenges to harmonize and standardize data quality indicators across European countries. We put forward some best practice guidelines for sampling SSF and show that these will have to be adapted at regional level in order to encompass existing variability at fleet and fisheries level
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An integrated and statistical approach for the valuation of economic status of small scale fisheries
The small scale fisheries are generally unknown over the world due to a crucial lack of data, and particularly costs and earnings data. This is also true for the European fisheries while vessels less than 12 meters represent almost 75% of the total European fleet. Faced to the increasing price of fuel and the depletion of traditional exploiting marine resources, fisheries managers need to know more about the small scale fleet, also in terms of its diversity. This paper first presents an integrated methodology, combining both biological and economic disciplines, used to collect data on small scale fisheries through questionnaires. The first set of collected data is used to produce a revenue model to assess individual earnings depending on technical characteristics and the fishing activity of the vessel. This revenue model allows then to assess the production of small scale fisheries per group of vessels. This revenue model is used in parallel to optimize the following sampling plans for collection of costs and earnings data. Implemented for 6 years in France, this system makes possible the assessment of total and per fleet gross value added and direct employment in the small scale fisheries. The results are presented in this paper and show the significant role of small scale fisheries in the French fishing sector
Report of the Working Group on Commercial Catches (WGCATCH)
The Working Group on Commercial Catches (WGCATCH), chaired by Hans Gerritsen (Ireland) and Nuno Prista (Sweden), met in Lisbon, Portugal, 9–13 November 2015. WGCATCH is responsible for documenting national fishery sampling schemes, establishing best practice and guidelines on sampling and estimation procedures, and providing advice on other uses of fishery data. The meeting was attended by 30 participants from 15 countries.
The group addressed a large number of terms of reference and the meeting was con-ducted through presentations, discussions and analysis of questionnaires. The main terms of reference were addressed in subgroups. The report is structured directly along the terms of reference and the main outcomes are listed below.
Data collection schemes for small-scale fisheries
WGCATCH provided descriptions of national small-scale fisheries through question-naires. An overview was obtained on the current data collection methods. Two major approaches were identified - census (e.g., sales, logbooks) and sampling methods (e.g., catch surveys) - and their main pros and cons were discussed. In most cases, specific sampling approaches are needed for these fisheries. The group developed a work plan to establish good-practice guidelines.
Analysis of case studies of commercial fishery sampling designs and estimation
Case studies of sampling designs and estimation involving megrim in divisions 7-8 were presented. A common theme is that issues with practical implementation of prob-ability-based sampling remain. WGCATCH summarized the main issues and provided a set of possible solutions. The group also provided guidance on dealing with previous data collected under métier-based sampling designs.
Simulation models to investigate survey designs
Several simulation studies were presented, most of them outlining the work of fishPi project (funded under MARE/2014/19) in evaluating regional sampling designs. A crit-ical review was carried out and WGCATCH produced general considerations and guidelines. WGCATCH recommends that these are taken into account when analysing the results of simulations of regional sampling design at RCM level.
The affect of the landing obligation on catch sampling opportunities
The affects on sampling and data quality of the current implementation of the landing obligation in the Baltic were reviewed. The group found that refusal rates for observer trips have increased to nearly 100% in at least one country, while in many other coun-tries on-board observer programmes did not suffer noticeable changes. WGCATCH established that the catches below the minimum size cannot be accurately estimated by sampling the landings below the minimum size because an unknown proportion of the catches may be discarded. The group also reiterated that it is important that the logbooks distinguish landings below and above the minimum size.
Publication on statistically sound sampling schemes
WGCATCH drafted detailed plans to produce a peer-reviewed paper in 2016. The pa-per will provide a synthesis of the evolution of sampling design towards best practice, illustrated with a number of concise case studies.
Estimation procedures in the Regional Database (RDB)
The work of WKRDB 2015 presented alongside existing and planned estimation pro-cedures in the RDB. Current work by Norway on a software package that will allow design-based estimation and optimization for stock assessment purposes was also pre-sented. The advantages of ensuring compatibility of this new software with the devel-opments currently planned for RDB-FishFrame are underscored.
Repository of resources relevant to catch sampling
WGCATCH initiated a repository with key resources; putting them into context with brief descriptions or review of each report, paper, book, website, software package etc. The intention is for this repository to be made available online by ICES.
Sampling of incidental bycatches
WGCATCH agreed to start routine documentation of sampling practices for bycatches of protected, endangered and threatened species (PETS) and rare fish species as well as routine evaluation of the limitations of current methods for collection and analysis.
Training course on Design and Analysis of Statistical Sound catch sampling pro-grammes
WGCATCH considered continuous training and expertise on sampling design, estima-tion and simulation to be the basis for successful implementation of statistical sound catch sampling programs. A new ICES Training Course in Design and Analysis of Sta-tistical Sound will take place at ICES HQ in Copenhagen, 12–16 September 2016. WGCATCH recommends that RCMs promote the attendance of these meetings among all MS involved
Biodiversity of polycyclic aromatic hydrocarbon-degrading bacteria from deep sea sediments of the Middle Atlantic Ridge
The bacteria involved in the biodegradation of polycyclic aromatic hydrocarbons (PAHs) in deep sea subsurface environments are largely unknown. In order to reveal their biodiversity, sediments from 2.2 m under the bottom surface at a water depth of 3542 m were sampled on the Middle Atlantic Ridge with a gravity column sampler. The sediments were promptly enriched with either crude oil or a mixture of PAHs (naphthalene, phenanthrene and pyrene) as the sole carbon source, and further enriched with the PAH mixture mentioned above in the lab. The resulting consortia were named C2CO and C2PPN respectively. Their bacterial composition was analysed with plate cultivation, PCR-DGGE and 16S rDNA library analysis. On plates, isolates belonging to Pseudoalteromonas, Halomonas, Marinobacter, Thalassospira and Tistrella dominated the culturable populations. With PCR-DGGE, five major bands closely related to Cycloclasticus, Alteromonas, Thalassospira, Alcanivorax and Rhodospirillaceae were detected in consortium C2CO, while only one major band of Cycloclasticus was detected in consortium C2PPN. In addition, the dynamics of community structure in response to aromatic substrate alterations were examined. As a result, three ribotypes of Cycloclasticus were detected by 16S rDNA library analysis, one which played a key role in phenanthrene degradation; two Alteromonas bacteria dominated the naphthalene reselected consortium. Although bacteria of the two genera grew as the main members of the communities, none of them were isolated, probably owing to their poor cultivability. These results confirm that bacteria of Cycloclasticus are important obligate PAH degraders in marine environments, and coexist with other degrading bacteria that inhabit the deep subsurface sediment of the Atlantic. This supports the view that PAH accumulation and bioattenuation occur in remote areas consistently and continuously
Report on the STECF Expert Working Group 17-12 Fisheries Dependent Information: ‘New-FDI’
The STECF expert working group (EWG) on Fisheries Dependant Information (FDI) took place in JRC, Ispra from 23 to 27 October 2017 to review the data transmitted by Member States under a new data call (‘New-FDI’).
The new data call specification was designed with three broad aims in mind
i) Compatibility between the New-FDI data and the data held in the Fleet Economic database.
ii) Ability to encompass all EU registered vessels including those from the Mediterranean, Black Sea and external waters fleets.
iii) Ability to assess effects of management measures.
The main purpose of the EWG was to judge if the call specification was appropriate to accomplish the above aims and to consider any difficulties encountered by member states in fulfilling the data call. Two terms of reference also allowed trial analyses to be conducted of a type relevant to the third broad aim.
The EWG addressed all Terms of Reference during the meeting and drew conclusions on the modifications required for the New-FDI data call going forwards.
Prior to the EWG it had been agreed by STECF Bureau that the report of the meeting would not be presented to STECF for approval as an STECF report but published separately (as a JRC technical report). This report therefore presents the data, methods observations and findings of an EWG of the STECF but the findings presented in this report do not necessarily constitute the opinion of the STECF or reflect the views of the European Commission and in no way anticipate the Commission’s future policy in this area.JRC.D.2-Water and Marine Resource
Small scale, big deal: Sampling catches from European small-scale fisheries.
Small-scale fleets (SSF) are important components of many ICES fisheries and are receiving growing attention within the CFP-reform and Marine Spatial Planning initiatives. In order to assess the importance of SSF within Europe, 2015 ICES WGCATCH compiled descriptions and data (effort, catch and value) of SSF fishing in EU waters, using 2012 as reference year and categorizing fleets by vessel length. The compiled information covered 17 countries describing a range of scenarios, spanning from the Baltic Sea to the Mediterranean. The <10m and 10–12m vessels were ranked highest in importance in nearly all countries in terms of number of vessels and employment. They were generally involved in multi-gear and multi-species fisheries developing seasonal or part-time activities into coastal areas with generally more sensitive habitats as nursery grounds or spawning aggregations. SSF were also found to be important for several fisheries in terms of effort, value and landings, and to represent a significant share of some TAC-quota or catches of regulated species, even though their landings may be under-reported. Group members also described the way SSF are sampled and estimated in their countries. The wide diversity in methodologies used to sample and estimate the impacts of SSF creates challenges to harmonize and standardize data quality indicators across European countries. We put forward some best practice guidelines for sampling SSF and show that these will have to be adapted at regional level in order to encompass existing variability at fleet and fisheries level
STECF Fisheries Dependent Information – FDI (STECF-19-11)
Commission Decision of 25 February 2016 setting up a Scientific, Technical and Economic Committee for Fisheries, C(2016) 1084, OJ C 74, 26.2.2016, p. 4–10. The Commission may consult the group on any matter relating to marine and fisheries biology, fishing gear technology, fisheries economics, fisheries governance, ecosystem effects of fisheries, aquaculture or similar disciplines. The STECF reviewed the report of the EWG on Fisheries-dependent Information during its winter 2019 plenary meeting
Scientific, Technical and Economic Committee for Fisheries. Evaluation of fishing effort regimes - Deep sea and Western waters (STECF-11-12)
EWG-11-11 meeting was held on 26 – 30 September 2011 in Cadiz (Spain). This Section of the report covers the Deep Sea and Western Waters and provides fleet specific trends in catch (including discards), nominal effort and catch (landings) per unit of effort in order to advise on fleet specific impacts on stocks under multiannual management plans. STECF reviewed the report during its November 2011 plenary meeting
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