Ungureanu Laurentia

Academy of Sciences of Moldova | ASM · Institute of Zoology

Articol prezintă rezultatele studiului indicatorilor calitativi și cantitativi ai fitoplanctonului râului Prut pe teritoriul Republicii Moldova în perioada anilor 2020-2023. În compoziția fitoplanctonul râului au fost identificate 101 specii. Conform rezultatelor acestor studii, s-a stabilit că compoziția fitoplanctonului s-a format în principal di...

The paper presents an overview of the results of multiannual investigations of the dynamics of migration of several metals in the ecosystems of the Dniester and Prut rivers-the main water courses of the Republic of Moldova. The dynamics of metals in water, suspensions, silts, aquatic plants, planktonic and benthic invertebrates, fish at different s...

The fishing regulatory measures in the Republic of Moldova that have been applied over the years in natural ecosystems have not always been effective - either through the faulty organization of the exploitation of fish resources, non-compliance with the fishing regime, failure to assess the state of fish resources, the ineffectiveness of ameliorati...

One of the objectives of the project Team up for healthy fish in the aquaculture system of the river Prut basin is to assess the health of fish populations; thus, the accumulation of Dracșani as a component part of the SC Piscicola Botoșani farm was studied. The parasitologically examined fish were of the silver carp (Hypophthalmichthys molitrix)....

Methodological guide is elaborated in the frame of the project BSB 165 Creating a system of innovative transboundary monitoring of the Black Sea river ecosystems transformation under impacts of hydropower development and climate change - HydroEcoNex (Joint Operational Program Black Sea Basin 2014-2020, financed by the European Union). In addition,...

The article presents the results of study of qualitative and quantitative indicators of phytoplankton of the Dniester River within the Republic of Moldova and Dubasari reservoir in 2020. In phytoplankton compositions of the Dniester River were identified 64 species, Dubasari Lake – 56 species. The numbers of phytoplankton changed within the limits...

The article presents the results on the study of productivity of phytoplankton and destruction of organic matter in the Dniester River and Dubasari reservoir in 2020. The values of primary production in Dniester River varied during the vegetation period within the limits of 0.81-3.79 gO2/m-2 24h, and of the destruction of organic substances between...

The book is recommended for publishing by the Scientific Council of the Institute of Zoology, Ministry of Education and Research, on July 26, 2021. Methodological guide is elaborated in the frame of the project BSB 165 Creating a system of innovative transboundary monitoring of the Black Sea river ecosystems transformation under impacts of hydropo...

Methodological guide is elaborated in the frame of the project BSB 165 Creating a system of innovative transboundary monitoring of the Black Sea river ecosystems transformation under impacts of hydropower development and climate change-HydroEcoNex (Joint Operational Program Black Sea Basin 2014-2020, financed by the European Union). In addition, so...

The article presents the results on qualitative and quantitative indicators of phytoplankton of the Prut River lower sector within the Republic of Moldova in 2018-2020. In phytoplankton compositions 72 species were identified. Seasonal and long-term patterns of phytoplankton development have been established in Prut River lower sector. The numbers...

Water quality is one of the key factors in maintenance of fish health. The current article revises the effects of various water quality parameters on fish health, methods of quality analysis and diagnosis of fish health, as well as methods for improving the water quality in fish ponds, aiming to reduce the fish health risks. The synthesis is a join...

In the lower Dniester, polyploid females of the hybrid complex Cobitis taenia are a portion spawning species with asynchronous development of germ cells during the entire breeding period. The spawning season in this water basin begins in the second decade of May and ends in July. In the population, in parallel with females, hermaphrodite individual...

Based on the multi-annual studies conducted in the aquatic ecosystems of the Republic of Moldova, have been developed scientific and practical recommendations regarding the prevention and reduction of the active eutrophication phenomenon in the country. One of the environmentally friendly method, economicaly efficient and advantageous is the use of...

The article presents the results of the investigations on diversity and quantitative structure of phytoplankton of different types of aquatic ecosystems within the Republic of Moldova during 2010-2015. The invasive species (native) Merismopedia tenuissima Lemmermann 1898, Synechocystis aquatilis Sauvageau 1892 and Aphanizomenon flos-aquae Ralfs ex...

Rezumat Lucrarea include rezultatele cercetărilor influenţei factorilor ecologici asupra productivităţii fitoplanctonului din ecosistemele fluviului Nistru şi lacului de acumulare Dubăsari pe parcursul anului 2017. S-a constatat că varietatea condiţiilor ecologice contribuie la dezvoltarea unor comunităţi de alge planctonice cu diferite preferinţe...

The article describes the results of long-term research on the dynamics of vanadium migration in water, bottom sediments, higher aquatic plants, bottom invertebrates, and fishes in the cooling reservoir of the Moldovan Thermal Power Plant. An obvious dependence of the level of vanadium in aquatic ecosystem on the quantity and composition of burnt f...

The present paper describes some peculiarities of the growth and reproduction of Carassius auratus s. latofrom the ecosystems of Lower Prut and Beleu Lake. This taxon is characterized by asynchronic development of oocytes and lying of three portions of eggs during the reproductive cycle. The histological analysis of the ovaries of Carassius auratus...

We carried out 12 field surveys in 2003 - 2011 at 36 study sites and collected 5699 specimens. Over time of analysis, we have identified 181 fish species belong to 139 genera, 64 families of 16 orders of the ichthyofauna in Gianh River, 5 rare species recorded in the Red Book of Vietnam (2007), 84 species having economic value, 68 species in upstre...

Analysis and identification of 57 specimens of genus Macropodus Lacépède collected from Gianh River in Quang Binh province in north center region Vietnam. We have classified three species: Macropodus erythropterus (Frey. & Her., 2002), Macropodus opercularis (Linneaeus, 1758), Macropodus spechti (Schreitmüller, 1936) was first discovered in the stu...

Summary. During the period 2009-2011 the Dubasari lake phytoplankton was represented by a total of 90 species and intra-specific taxons, where Bacillariophyta, Cyanophyta and Chlorophyta species are prevailing. Numbers of phytoplankton ranged from 6.16 to 13.76 mln.cel/l with the biomass from 4.27 to 18.41 g/m3 in the spring and from 2.13 to 35.99...

The biomass of plants from the Cuciurgan cooling reservoir of the Moldovan Thermal Power Plant is dependent on the reservoir thermofication and bore considerable modifications. The contents of many metals in aquatic plants were highly correlated with their contents in water: r=0,87-0,91. The dynamics of trace element accumulation depends on seasona...

Prut is the second largest river in Moldova. It takes its beginning from the South-East side of Goverla peak, 15 km South-Southwest of Vorokhta village in the woody Carpathian mountain massif Cernogora. The total length of the river is 967 km, in Moldova’s borders—695 km, the catchment area is 27,540 km2; Prut waters pours in the Danube at 164 km f...

The main role in the development of bacterioplankton, phytoplankton and zooplankton belongs to nutritive elements, especially nitrogen and phosphorus compounds. Dynamics and ratio between the ammonifying, nitrifying and de-nitrifying bacteria is directly dependent on the content of ammonium ions, nitrates and nitrites in the waters of aquatic ecosy...

The biomass of plants from the Cuciurgan cooling reservoir of the Moldovan Thermal Power Plant is dependent on the reservoir thermofication and bore considerable modifications. The contents of many metals in aquatic plants were highly correlated with their contents in water: r=0,87-0,91. The dynamics of trace element accumulation depends on seasona...

The paper includes the results of green algae investigations, made during 1989-2011 in the major aquatic ecosystems of Moldova: the Dniester river, the Prut river, Cuciurgan, Dubasari and Costeşti-Stanca reservoirs. The obtained results are compared with data from previous studies (1956-1988). During the period of 1956-2011, there were identified 3...

UDC:574.635:574.632.017 WATER QUALITY FORMATION AND IMPROVEMENT: THE KEY ROLE OF BIOLOGICAL, ECOLOGICAL AND BIOCHEMICAL FACTORS. Ostroumov S.A., Toderas I.K., Ungureanu L.N., Miron A.A., Breahna A.I. //Buletinul Academiei de Ştiinţe a Moldovei. Ştiinţele vieţii. 2010. No 3 (312), p. 22-44. The paper provides a review of the authors’ long-term studi...

In the present work are revealed the results of the multi-annual researches on the dynamics of the hydrochemical indexes (salinity, main ions, nutritive elements, trace elements, suspended matter, etc.) in the Dniester river. The results of the field and experimental researches show that the content and the dynamics of the majority of the indexes a...

The functioning of freshwater ecosystems is a multidimensional process, influenced by different factors, including the relationships between the abiotic and biotic parameters and the development of primary (aquatic plants) and secondary (plankton invertebrates) producers. The study presents the results of the long-term hydrochemical, hydrobiologica...