QUANTITATIVE AND QUALITATIVE EVALUATION OF ICHTHYOPLANKTON IN THE ROSCI0066 DANUBE DELTA - THE MARIN AREA SITE – A CASE STUDY IN VERNAL SEASON 2012
Journal Title: Current Trends in Natural Sciences - Year 2014, Vol 3, Issue 5
Abstract
Ichthyoplankton are the eggs and larvae of fish and is a component of the trophic spectrum of different consumers, but also is a new ichtyofauna for aquatic ecosystem. To assess the qualitative and quantitative structure of the ichthyoplankton in ROSCI0066 site, in vernal season 2012, the samples were collected using Bongo net in six stations (Sfantu Gheorghe, Zaton, Sahalin, Periteasca, Sulina, Portita). For each particular station were recorded the data like: date when the sample was taken; the geographical coordinates of the station; water depth (m); the number of revolutions of the net. The biological samples were stored in 4% formaldehyde and analyzed in the laboratory. To estimate the number of spawn and larvae per m2 was used Tanaka's formula, by taking into consideration: the sampling depth, the surface net, the number of revolutions of the flow meter, the volume of filtered water (m3), number of spawn or larvae collected. Ichthyoplankton results are expressed in number of individuals/sample and individuals m-2 and for juveniles in numbers/trawling and individuals m-2. In the ROSCI0066 Danube Delta - the Marin Area site, in vernal season 2012, it is found that the diversity of species in the samples analyzed is very low, being identified only four species of fish from the Engraulidae, Clupeidae, Mullidae and Gobiidae families. According to the results, sprat prefers the south of the Romanian Black Sea coast and is prevalent in evidence by the presence of eggs and anchovy by the presence of larvae.
Authors and Affiliations
Carmen Georgeta Nicolae, Madalina Galatchi, Monica Marin, Valodia Maximov, Ion Răducuţă, Gratziela Bahaciu
Keywords
Related Articles
- EP ID EP24987
- DOI -
- Views 353
- Downloads 15
BEHAVIOUR OF SOME GRAPES VARIETIES FOR WHITE WINE IN SEASON PHENOLOGICAL IN SANDY SOILS CONDITIONS FROM SOUTH-WESTERN OLTENIA
Observations carried out in the period 2012-2016, on a number of grape varieties with 17 for white wines, showed that, in specific climatic conditions sandy soils of south-western Oltenia, the vine in the growing season...
LANDSLIDES IN SUCEAVA COUNTY
In the county of Suceava, the landslides are a real and permanent problem. This paper presents the observations of landslides over the last 30 years in Suceava County, especially their morphology, theirs causes and the...
CHARACTERIZATION OF USEFUL AND HARMFUL INSECTS BIODIVERSITY IN VALEA CALUGAREASCA VITICULTURAL ECOSYSTEM
The mail goal of this paper was to analyse the environmental impact of agricultural practices in Valea Calugareasca viticultural ecosystem. Diversity characterizes the healthy state of ecosistems. The quantification of...
THE MOST IMPORTANT NON-WOOD FOREST PRODUCTS FROM ARGEŞ COUNTY
Argeş is one of the counties from Romania with the highest potential in terms of harvesting and commercialization of non-wood forest products (NWFPs). Across the county, the distribution of NWFPs in not uniform, being c...
HULLED WHEAT FARMING IN DEVELI
Emmer (Triticum dicoccum) and einkorn (T. monococcum) cultivation has a long history in Anatolia. The crops, cultivated in Anatolia over thousands years, can still be found in some parts of the country, especially Devel...