Feriha TserkovaAgricultural Academy - Bulgaria · Institute of Fish Resources - Varna
Feriha Tserkova
PhD
About
31
Publications
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72
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Citations since 2017
Introduction
Feriha Tserkova currently PhD at the Institute of Fish Resources - Varna, Agricultural Academy, Bulgaria - Sofia. Feriha does research in Molecular Biology, Ecology, Systematics (Taxonomy) and Ichtiology. Their most recent publication is 'Molecular taxonomy study of representatives of the genus Gobius inhabiting coastal waters of Black Sea region.'
Additional affiliations
November 2010 - present
Publications
Publications (31)
In 2020 - 2021 was performed biological monitoring on R. venosa samples, collected
from the landings of the fishing fleet of the Republic of Bulgaria Thе research aims to
establish the peculiarities of the weight, size and the sex structure of R. venosa, to estimate
length -weight relationships and to compare the data in seasonal, interannual an...
Over the last few years, data on seasonal and interannual variations in the biological parameters of picked dogfish in the Black Sea have been limited, which hampers the understanding of the current status of this vulnerable species and management options. We studied the size and sex structure, as well as the link between the length and weight of p...
Marine biota are redistributing at a rapid pace in response to climate change and shifting seascapes. While changes in fish populations and community structure threaten the sustainability of fisheries, our capacity to adapt by tracking and projecting marine species remains a challenge due to data discontinuities in biological observations,
lack of...
Marine biota are redistributing at a rapid pace in response to climate change and shifting seascapes. While changes in fish populations and community structure threaten the sustainability of fisheries, our capacity to adapt by tracking and projecting marine species remains a challenge due to data discontinuities in biological observations, lack of...
Catches of the commercial beam trawl fishery for Rapana venosa in Bulgarian waters were assessed during summer-autumn 2017. The fish bycatch was analysed, with a particular emphasis on the bycatch rate of turbot juveniles. Four commercial boats were chartered and catch species composition as well as weight and length of turbot bycatch were recorded...
The family Clupeidae is believed to be represented by nine species in the Black Sea. However, this view is not generally accepted and the genus Alosa is one of the most challenging groups from taxonomic point of view. The phylogenetic relationships among three shad species (Alosa caspia, Alosa immaculata and Alosa tanaica) from Bulgarian marine wat...
Marine biota is redistributing at a rapid pace in response to climate change and shifting seascapes. While changes in fish populations and community structure threaten the sustainability of fisheries, our capacity to adapt by tracking and projecting marine species remains a challenge due to data discontinuities in biological observations, lack of d...
The purpose of this project is to collect data for the catches (main catches and bycatches) of marine organisms by different types of fishing activities of the Bulgarian fisheries' fleet.
The main study is carried out in 2018-2019 and the following types of fishing vessels are observed:
(1.) turbot fishery with gillnets;
(2.) pelagic and bottom sp...
Analyses of data from the biometric measurements of 2400 specimens Rapana venosa, collected during 2018 – 2019 from landings of Bulgarian fishing fleet in nine ports – Krapets, Durankulak, Kavarna, Balchik, Varna, Byala, Sozopol, Tsarevo and Rezovo are included in this study. The Rapana fishing techniques involve beam trawling and scuba diving. For...
During the last few years, the Western Black Sea coast has documented increase in the number of stranded marine mammals, particularly the harbour porpoise (Phocoena phocoena). This species is a subject to threats such as exposure to contaminants, fishery by-catch and introduced new marine species. The aim of this study was to analyse spatial and ag...
For assessment of S. maximus abundance, the Institute of Fish Resources - Varna has conducted several demersal trawl surveys in the Western Black Sea during 2014-2016, with the frames of the National Programs for Fisheries Data Collection.
The present study provides information on the stranding of cetaceans along the Bulgarian Black Sea Coast during 2017. Observations were made trough covering transects along the Bulgarian Black Sea Coast. A total of 198 cetaceans of three species were found-Harbor Porpoise (Phocoena phocoena), Bottlenose Dolphin (Tursiops truncatus), and Common Dolp...
This report is based on the data collected through the survey during 24-30 May 2017 , indicative of the distribution and values of the relative biomass and abundance of the reference species Scophthalmus maximus. This document contains a series of tables and figures that show the relative biomass distribution, as well as size/age and sex structure...
Fishing season for rapana, with beam trawls, covers the period from end of April until middle of October. Rapana trawling is concentrated in the coastal zones with depths 10 - 35 m, inhabited by multiple bottom fish species. Thus, it is essential to study the effects of beam trawling on the bottom fish species, which appear components of the incide...
According to their origin the Black Sea gobies can be divided to Ponto-Caspian
relicts and Mediterranean immigrants. The increase of species diversity in the Black
Sea is a consequence of Mediterranean immigrants. The present study investigated
the variability in Cytochrome b sequences isolated from two former Mediterranean
immigrant species: Gobiu...
Abstract:
The intensive development of aquaculture during the last decades is related to increased spread of diseases caused by bacterial pathogens. They cause high mortality and significant economic losses. Molecular techniques are the best alternative to traditional methods offering fast, accurate and reliable methods for detection and identific...
Round goby (Neogobius melanostomus) is a native species for the Black Sea, Sea of Azov, Sea of Marmara
and Caspian Sea as well as in coastal lakes, lagoons and rivers in their basins. It is also an invasive species,
which recently established large non-native populations in the Baltic Sea, several major Eurasian rivers,
and the North American Great...
Trawl investigations on turbot (Psetta maxima L.) were carried out in November 2014 along the Bulgarian Black Sea coast, aiming to determine the biological parameters and population structure, CPUE (catch per unit effort), CPUA (catch per unit area) and biomass of agglomerations. A total of 38 trawl hauls were performed and qualitative and quantita...
This study aimed to identify length, weight and sex of picked dogfish (Squalus acanthias L.), gathered as by-catch in November 2014, during the regular turbot data collection program in Bulgarian Black Sea waters. The shark was mainly distributed at depth stratums 30-50 m and 50-75 m, but formed low abundance. A total of 16 fish specimens, with len...
The round goby (Neogobius melanostomus) is a euryhalinebottom–residing fish, native to central Eurasia. It is widespread in the Sea of Marmara, Black Sea, Caspian Sea and Sea of Azov where it has been reported along all coasts and in fresh water bodies, including coastal lakes and lagoons. The species was accidentally introduced via ballast water o...
On the basis of 3 year analysis (2011-2013) and the set of long-term data on the dynamics and size-age structure of the Black Sea sprat Sprattus sprattus L. in Bulgarian Black Sea coast to assess the population status in the region and possible changes. The results indicate that the biological status of the population of sprat to Bulgarian coast fo...
TSERKOVA, F., 2013. Growth parameters of the Black Sea sprat (Sprattus sprattus L.) during the period November 2010 – March 2012 along the Bulgarian Black Sea coast. Bulg. J. Agric. Sci., Supplement 1: 109–113 The goal of the present paper is to defi ne some basic characteristics of the population of Black Sea sprat (Sprattus sprattus L.) along the...
Carangidae is a family of marine, mostly predatory fishes, which comprises of species like jacks, pompanos, jack mackerels and scads. Several of them are subject of commercial fishing. In Black Sea Carangidae is represented by two species: Trachurus trachurus and T. mediterraneus. The Mediterranean horse mackerel (Trachurus mediterraneus) is subjec...
The goal of the present paper is to defi ne some basic characteristics of the population of Black Sea sprat (Sprattus sprattus
L.) along the Bulgarian cost such as size and age composition, performance and character growth, relationship between weight
and length and index of Fulton. It was found that the growth in the period 2010–2012 is alometric....
Biological characteristics age, distribution, growth (length and weight), growth rates and condition factor of sprat (Sprattus sprattus L.) from the Bulgarian Black Sea coast have been examined. In 2012 we collected 8989 sprat species, which they ranged between age group I and III. Age groups I and II were predominant in the catch composition. Dime...
According to many authors, in Black sea Clupeidae family is represented by 9 species. However, this concept is not commonly accepted. For instance some molecular data demonstrated that the differences between A. caspia and A. immaculata are less than 0.8%, which could means that they were very recently split into two different species and still may...
Projects
Projects (5)
The main tasks of the demersal trawl surveys include: (i) Qualitative and quantitative analysis of the catches and biometric measurements; (ii) Estimation of demographic structure, sex ratio and growth of turbot; (iii) Analysis of stomach content; (iv) Assessment of catch per unit effort ,catch per unit area, total biomass/abundance of turbot, and analysis of the of the opportunities of stock exploitation.
1. Determining the "hotspots" of white mussels accumulations off the Bulgarian coast by assessment of the stocks and biological characteristics of the species of the group of white mussels (Chamelea gallina, Donax, Anadara iaequivalvis, etc) and comparison with previous studies.
2. Enrichment of information on descriptors D 1 (Biodiversity) and D 3 (Sustainable stocks of species subject to industrial fishing) to the Marine Strategy Framework Directive (MSFD, 2008/56/EC) concerning the studied habitats - infra- and sublittoral biocenoses, with dominant white mussel species.
3. Proposals for regulatory measures - reduction of fishing effort, measures related to maritime spatial planning and marine protected areas and studies on good practices for conservation and recovery of white mussel stocks in different regions of the World Ocean.
The project aims at data collection for the bycatch of marine organisms by different types of fishing activities of the Bulgarian fisheries' fleet. During 2018 - 2020 the following types of fishing vessels were observed:
(1.) turbot fishing with gillnets;
(2.) pelagic and bottom species fishing with pelagic trawl;
(3.) Rapana fishing with beam trawl;
(4.) pelagic and bottom species fishing with polyvalent active and passive gears.
The collected data include total catch of the target species, composition and quantities of the bycatches of marine organisms. The dynamics of the main catches and bycatches quantities by months and seasons were estimated, as well as bycatch species composition, bycatch rate, size, sex and age structure.
