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Radu G.,National Institute for Marine Research and Development | Anton E.,National Institute for Marine Research and Development | Golumbeanu M.,National Institute for Marine Research and Development | Raykov V.,Institute of Fishing Resources | And 4 more authors.
Journal of Environmental Protection and Ecology | Year: 2011

The paper presents the evolution of the Black Sea ecosystem as a characteristic inland sea, subject to land-based pollutions and other human influences. Under these circumstances, the fishery was the sector most affected by the important changes of the Black Sea ecosystem. The main causes responsible for decline of marine living resources were generated by: eutrophication (sources from agriculture, municipal waste, industry, etc.); harmful substances (sources from agriculture, industry, municipal waste, etc.); hydraulic works; commercial fisheries; alien species; climatic changes. On the other hand, fishing activities contribute themselves to the worsening of the ecological situation and for the depletion of the fish stocks through: open access to resources management regime applied individually by each coastal country; overfishing and illegal fishing and the use of destructive harvest techniques. Presently, in the Black Sea area there is not a regional fishery management organisation. The fisheries regulatory framework is promoted by each coastal country, not being harmonised at a regional level, even in the case of shared or migratory species. Under these circumstances, each country has carried out its own researches related to the state of the fish resources. The evolution and state of 5 main Black Sea commercial fish species: sprat - Sprattus sprattus; anchovy - Engraulis encrasicolus; horse mackerel - Trachurus mediterraneus ponticus; turbot - Psetta maxima maeotica and whiting - Merlangius merlangus euxinus are also presented.

Agency: European Commission | Branch: FP7 | Program: CP-CSA-Infra | Phase: INFRA-2008-1.1.1 | Award Amount: 4.00M | Year: 2009

The recently finished FP6 RI Black Sea SCENE project has established a Black Sea Scientific Network of leading environmental and socio-economic research institutes, universities and NGOs from the countries around the Black Sea and has developed a distributed virtual data and information infrastructure that is populated and maintained by these organisations to improve the identification, access, exchange, quality indication and use of their data and information about the Black Sea. The Black Sea SCENE research infrastructure stimulates scientific cooperation, exchange of knowledge and expertise, and strengthens the regional capacity and performance of marine environmental data and information management, underpins harmonization with European marine data quality control/assessment procedures and adoption of international meta-data standards and data-management practices, providing improved data & information delivery services for the Black Sea region at a European level. The Up-Grade of Black Sea SCENE project aims: a) to extend the existing research infrastructure with 19 marine environmental institutes/organizations from the 6 Black Sea countries, b) to implement the results of the Joint Research Activities of the FP6 RI SeaDataNet project (common communication standards and adapted technologies to ensure the datacenters interoperability), c) to network the existing and new Black Sea datacenters, active in data collection, and provide integrated databases of standardized quality on-line, d) to realize and improve on-line access to in-situ and remote sensing data, meta-data and products and e) to adopt standardized methodologies for data quality checking to ensure the quality, compatibility and coherence of the data issuing from so many sources. The Up-Grade Black Sea SCENE project is undertaken by 51 partners of which 43 are located in the Black Sea countries.

Yankova M.H.,Institute of Fishing Resources | Raykov V.S.,Institute of Fishing Resources | Gerdzhikov D.B.,Institute of Fishing Resources | Frateva P.B.,Professional Technical School
Turkish Journal of Zoology | Year: 2010

Between April 2007 and October 2008 we collected 1995 horse mackerel specimens from the territorial waters of the Bulgarian Black Sea. Age, length, and weight of these specimens were determined to estimate length-weight relationships and age composition. The present study utilized otolith characterization to determine age. The sex ratio was 1:1.36686 (M:F). The prevalent age classes were 2+, 3+, and 4+. The exponent b of equation resulted in the value 3.3046, which indicates that the weight growth is positive allometric. Growth parameters of the von Bertalanffy equation were separately evaluated for females and males as follows: L∞ = 19.66, K = 0.3075 y-1, to = -0.8359, and W∞ = 69.676, and L∞ = 18.78, K = 0.3373 y-1, to = -0.8247, and W∞ = 62.037, respectively. The maximum age was 6+ years for females and 5+ for males. © TUBİTAK.

Agency: European Commission | Branch: FP7 | Program: CSA-SA | Phase: KBBE.2011.1.4-02 | Award Amount: 1.12M | Year: 2012

ComFish takes the view that it is not sufficient to focus on pressing issues in fisheries or on communication impasses between stakeholders in isolation (scientists industry policy makers). A broader view is necessary, and this is very much in line with the ecosystem approach of the revision of the Common Fisheries Policy to be implemented in 2012. In this frame of mind, ComFish aims to identify important fisheries topics with long term impacts and ascertain whether scientific results have been properly communicated to fisheries stakeholders. If yes, why and how was this done? If not, then the question must be answered which communication needs must be addressed. What are the related challenges, needed actions and possible solutions? ComFish will identify these topics and through five regional participatory stakeholder events address these communication impasses. Next, ComFish will use the outcome of the events to prepare Information Packages, that include audio-visual materials, and communicate the identified priority issues to a wider circle of stakeholders as well as to EU citizens. Finally, ComFish will organise a Partnering Event to facilitate network building amongst stakeholders, to jointly address and overcome communication impasses and to stimulate collaborations. All activities are supported by a robust science based impact analysis. ComFish has nine partners in eight EU countries: four are communication specialists and five are institutions engaged in marine research and policy advice. The project benefits from an extensive Advisory Board with representation from all major fisheries stakeholders in Europe as well as over 40 Project Associated Members, mostly FP6/FP7 research project co-ordinators. The project lasts 36 months.

St Raykov V.,Institute of Fishing Resources | Bikarska I.,Executive Agency for Fishery and Aquaculture | Panayotova M.,Institute of Oceanology BAS | Lisichkov K.,University of Macedonia
Journal of Environmental Protection and Ecology | Year: 2011

For proper fisheries management it is important to know fishing effort. One of the main problems in the Black Sea region is the lack of comprehensive information concerning the fishing activity, catch quantities and composition and how it affects the current state of fish stocks. We identified that the implementation of the fishing vessels monitoring system (VMS) is a powerful source of information regarding the fishing areas, fishing effort and also ensuring reliable fishing statistics. We are aware that in the Fisheries sector is really difficult to produce authoritative reports on the catch quantities and composition on annual principle, which means that we do not have a clear picture in this matter and the analysis of the current state of the stocks is with a fair approach to accuracy. The communication between responsible authorities and data exchange on regional level are not systematic.

Raykov V.St.,Institute of Oceanology | Yankova M.,Institute of Fishing Resources | Radu G.H.,NIMRD G. Antipa | Lisichkov K.,University of Macedonia
Journal of Environmental Protection and Ecology | Year: 2011

Estimation of the optimum levels of exploitation for the sprat is based on using the structured and non-structured equilibrium models for the north-western part of the Black Sea. In the present paper, based on the concept of maximum sustainable yield (MSY), some sustainable yield curves have been created. It was found for the Black Sea sprat that yield per recruit curves does not reached the maximum value within the range of fishing mortality investigated. Medium confidence band shows that at fishing mortality rates around 0.8 the ratio yield and fishable biomass at unexploited level is around 0.25. It is seen from the year/recruit (Y/R) analysis that recruitment is unaffected regardless of how low spawning stock biomass (SSB) falls. It was clear that levels of fishing mortality that produces yield per recruit (Y/R) at or near the maximum will also reduce the spawing stock biomass (SSB) to levels that are a tiny fraction of its unexploited level. The value of F 0.1 is arbitrary and thus, there is no guarantee that this is the proper management level for biological purposes (as a tonic for recruitment over fishing, for example) let alone when economic, social, and other environmental objectives are considered.

Maximov V.,National Institute for Marine Research and Development Grigore Antipa | Raykov V.S.,Institute of Fishing Resources | Yankova M.,Institute of Fishing Resources | Zaharia T.,National Institute for Marine Research and Development Grigore Antipa
Journal of Environmental Protection and Ecology | Year: 2011

The whiting, a demersal species which populates the Romanian and Bulgarian shelf of the Black Sea littoral, represents the most important capture of the regional fishery potential as far as the commercial interest is concerned. The present paper reviews the actual state of the demersal fishing in the Romanian and Bulgarian marine area of the Black Sea and the evolution, in time, of this species. Between 2000 and 2008, the whiting represented 20 to 25% of the total catch realised by commercial fishery. The catches of whiting were realised both by trawler ships (fishing by mid-water otter trawl) and net traps (installation for fishing in the shallow coastal areas). The paper presents the qualitative and quantitative structure of the whiting catches from the Romanian and Bulgarian littoral sector, between 2000 and 2008. The growth parameters for the both areas are also presented.

Uzunova S.,Institute of Fishing Resources
Bulgarian Journal of Agricultural Science | Year: 2010

Seagrasses are marine flowering plants typically found on sandy or muddy substrata in the shallow coastal waters. They present à good biotope for associate flora and fauna. Two eelgrasses species are reported for Black Sea - Zostera marina Linnaeus, 1758 and Zostera noltii Hornemann, 1832. The aim of the present paper is to give evidence on the zoobenthos living in the Zostera spp. from the Bulgarian coastal area of the Black Sea. The investigations were carried out in August 2000. Total of 69 zoobenthic organisms, belonging to four groups: Polychaeta, Mollusca, Crustacea and Varia were collected. High values of abundance and biomass were recorded, due mainly to molluscan and crustacean species.

Petrova D.,Institute of Fishing Resources | Gerdzhikov D.,Institute of Fishing Resources
Bulgarian Journal of Agricultural Science | Year: 2010

The representatives of class Euglenophyceae inhabit mainly freshwater basins but some species occur also in marine and brackish waters. Along the Bulgarian coast, in Varna - Beloslav Lake system large-scale development and blooms of Euglenophyceae have not been observed since a lot of years. This paper discusses their quantitative and qualitative distribution in 2008.

Ozturk B.,Istanbul University | Mihneva V.,Institute of Fishing Resources | Shiganova T.,RAS Shirshov Institute of Oceanology
Aquatic Invasions | Year: 2011

The ctenophore Bolinopsis vitrea is first reported from the Turkish and Bulgarian regions of the Black Sea. In Turkish waters, a considerable aggregation was found in Sile on the Asian side and at Kilyos on the European side in 2007. This appears to be the first record of this species in the Black Sea, which is known in the Mediterranean Sea including the Aegean Sea. Bolinopsis vitrea most likely penetrated with currents from the Aegean Sea via the Sea of Marmara into the Black Sea. In 2010 individuals of this species were recorded at two locations in Bulgarian waters where it may have entered with currents or else was released with ballast water. © 2011 The Author(s).

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