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 348
- Downloads 15
ASPECTS OF GREEN CADASTRE IN THE CAMPUS OF UNIVERSITY OF PITESTI
Regardless of belonging and purpose, green spaces contribute to the improvement of the environment, maintaining ecological balance, improve assortment of ornamental plants, maintain and protect precious natural objects...
APPRECIATION OF QUALITY FOR SOME TOMATOES VARIETIES BY USING THE DETERMINATION OF PHYSICAL-CHEMICAL PARAMETERS
The studies were done on three varieties of tomatoes from Spain (red cherry, yellow cherry and kumato cherry). The following parameters: pH, soluble solids, content of water (moisture), content of minerals (ash), titrat...
A SHORT DESCRIPTION OF ANDROSACE GENRE PLANTS PRESENT IN ALEXANDRU BELDIE HERBARIUM FROM I.N.C.D.S. BUCHAREST
”Marin Drăcea” National Institute for Research and Development in Forestry from Bucharest has in its possession a Herbarium with a rich collection of plants (approximately 60.000 plates) and which is registered in Index...
MORPHOLOGICAL CHARACTERISTICS OF TOMATO IRRIGATED WITH WASTEWATERS WITH DIFFERENT OXYGEN CONCENTRATIONS
Water scarcity is an ever-aggravating problem worldwide. In particular, there is greater emphasis placed on arid and semi-arid regions like Turkey. Although quite much progress have been achieved, several countries toda...
CURRENT SITUATION OF THE TABLEGRAPE VARIETIES CULTURES IN ROMANIA AND WORLDWIDE
The research of the present paper aimed at determining the position of the Romanian viticulture in relation to international viticulture, as regards the culture of grapevine varieties for tablegrapes. The data presented...