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 328
- Downloads 15
EXPLORING THE POTENTIAL BENEFITS OF NATURE BASED EXPERIENCE ON ANXIETY
This study extends the previous research regarding the beneficial impacts of nature experiences on mental and physical health. A provocative exercise was designed to facilitate the sensory contact with natural objects o...
RESEARCHES REGARDING THE CHANGES OF SOME PHYSIOLOGICAL PARAMETERS AT THE PRUSSIAN CARP (Carassius auratus gibelio Bloch 1782) UNDER THE ACTION OF THE DUAL GOLD 960 EC HERBICIDE
Herbicides are chemical substances with selective toxic action (limited for some vegetal species) or general (for any species), used to fight against weeds in the crops, fruit and grapes-growing fields, parks etc. The a...
INFLUENCE OF HEAVY METALS ON GAMETOPHYTE DIFFERENTIATION IN TWO DRYOPTERIS SPECIES IN ROMANIA’S FLORA
In this work we aimed to study the influence of Zn, Cu and Pb compounds on spore germination and gametophyte development in the species Dryopteris affinis (Lowe) Fraser-Jenkins and Dryopteris filix-mas (L.) Schott. The...
RESEARCH ON ARGES RIVER FISH FAUNA IN BUDEASA-GOLESTI AREA
Arges River was subject to periodic ichthyologic, hydrobiological and hydrological research. By its content and approach the present paper shows a series of research on fish fauna in Budeasa-Golesti area of Arges River,...
BIOLOGICAL ASPECTS, COMPOSITION AND POTENTIAL APPLICATION OF CYNARA SCOLYMUS L.
Nature represents an inexhaustible resource for human people’s health and care. In the last couple of years, medicinal and aromatic plants (MAPs) became one of the main research fields in Romania due to their therapeuti...