Ruzan Hovhannisyan- PhD of Biology
- Researcher at National Academy of Sciences of Armenia
Ruzan Hovhannisyan
- PhD of Biology
- Researcher at National Academy of Sciences of Armenia
About
63
Publications
495
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
14
Citations
Current institution
Additional affiliations
Scientific Center of Zoology and Hydrobiology of NAS Armenia
Publications
Publications (63)
The degradation and loss of aquatic ecosystems have become environmental challenges facing the world. This study aimed to assess the ecological status of the Shnogh River and its tributaries (the Kharatadzor and Dukanadzor rivers) in the northern mining region of Armenia using macrozoobenthic parameters. Macrozoobenthic samples were collected from...
A total of 150 individuals of 9 fish species have been examined. 12 species of parasites were detected at the examined fishes. Fish parasite infection overall rate in water bodies of North-East Armenia was equal to 63.3%. The fishes were more infected by Diplostomum metacercariae, Dactylogyrus sp., Rhabdochona fortunatowi, as well as Ligula pleuroc...
Background. Fish parasitic diseases seriously damage fish farming and significantly influence the fish viability. North-East region of Armenia (Sevan Lake basin and Aghstev river valley) is the most important recreation center of the country. Ecosystems of the mentioned region have been undergone antropopression
significantly. Research of biodivers...
150 особей 9 видов рыб: серебряного карася, храмули, восточной быстрянки, севанского и куринского усачей, сига, куринского гольца, куринской уклейки и золотистой щиповки. Исследования рыб проводили в Научном центре зоологии и гидроэкологии по общепринятой методике паразитологических вскрытий. Статистическую обработку результа-тов проводили с помощь...
The study of the behavior of ixodid ticks when attacking the host and their parasitism on certain parts of the body will make it possible to develop more effective tick control measures to reduce the economic damage caused by ixodid ticks to livestock in certain natural areas of Armenia. For the first time on the territory of the recreational zones...
The study of the behavior of ixodid ticks when attacking the host and their parasitism on certain parts of the body will make it possible to develop more effective tick control measures to reduce the economic damage caused by ixodid ticks to livestock in certain natural areas of Armenia. For the first time on the territory of the recreational zones...
Data from studies of the species composition of the fish helminth fauna and the degree of fish infection in the lower reaches of the Hrazdan River are presented. The studies were conducted in 2019–2020; 454 individuals of 15 fish species were examined. The detected helminth fauna was characterized by low species diversity, as a result, 5 species of...
https://www.researchgate.net/publication/393653940_Fish_helminth_fauna_of_the_Debed_river_of_the_Lori_Region_of_Armenia
The monitoring of the epizootic situation on helminthiasis of small ruminants was conducted in the foothill zone of Armenia, on the territory of the Joint RussianArmenian Scientific and Experimental Center of Zoology and Parasitology (JRASEC). The study was carried out on sheep of different age groups (young animals aged 1–2 years and adult sheep o...
A diverse array of spider species inhabits agroecosystems and wild mountainsides, where beekeeping boxes are temporarily installed for natural feeding. Over the past decade, the wax moths Achroia grisella and Galleria mellonella have become widespread pests in bee colonies within Armenian agrosystems and have also caused damage to stored honeybee c...
The parasite fauna in domestic animals, birds, fish, ixodofauna, some biohelminths’
circulation routes, and nematodes isolated from wood samples were studied. The
fauna includes 50 species including 29 helminth species, of which 6 trematode
species: Dicrocoelium dendriticum ( D. lanceatum), Fasciola hepatica, F. gigantica,
Paramphistomum cervi, Dip...
The parasite fauna in domestic animals, birds, fish, ixodofauna, some biohelminths’ circulation routes, and nematodes isolated from wood samples were studied. The fauna includes 50 species including 29 helminth species, of which 6 trematode species: Dicrocoelium dendriticum (D. lanceatum), Fasciola hepatica, F. gigantica, Paramphistomum cervi, Dipl...
The aim of the work is to study the fish helminth fauna of Lake Sevan basin. Material and Methods . Fish helminths and molluscs were collected from the Lake Sevan basin. A total of 214 specimens of fish were studied. The collection, cameral processing and determination of the material was carried out according to generally accepted methods. Statist...
ruhov37@rambler.ru Исследовали гельминтофауну рыб реки Раздан в окрестностях г. Еревана. В результате обследования 94-х экз. 7-ми видов рыб по общепринятой методике было зарегистрировано 7 видов гельминтов. Они были локализованы в полости тела, кишечнике и хрусталиках глаз рыб. Общая инвазированность рыб гельминтами составила 35 %. Определены эксте...
e гельминтофауны рыб реки представляет научный и практи-ческий интерес, особенно ввиду усиления антропогенного пресса в данном регионе. В 2018 г. из среднего течения реки по общепринятой методике па-разитологических вскрытий было обследовано 86 экз. рыб 6-ти видов из сем. Cyprinidae. Общая инвазированность рыб гельминтами составляла 36%. У рыб были...
the ecologo-sanitary quality classification accepted in the CIS (Commonwealth of Independent States) countries and the E. coli bacteria criteria set by the U.S. Kansas Department of Health and Environment. The results of the investigation showed that BOD5 values and total planktonic bacteria count in the Voghji river sites located downstream from K...
Data on helminth fauna of fishes from the Metsamor river are presented. 108 individuals of 9 fish species have been investigated. 41,7 % of fishes (45 individuals) were infested. 6 species of helminths have been recorded. They were found out in the body cavity, intestine, crystalline lenses and on the gills of fishes. Extensity and intensity of inv...
9 видов биогельминтов: в полости те-ла, кишечнике, сердце и хрусталиках глаз. Проведен анализ изменений видового состава обнаруженных гельминтов в динамике, с учетом изменений фауны их промежуточных хозяев, в условиях гидроэкологиче-ских преобразований озера. Ключевые слова: биогельминты, рыба, озеро Севан, антропогенное воздействие. Из-за искусств...
A new species of nematode has been registered in the fish helminth fauna of Armenia. A study of khramicarp helminth fauna from Sevan Lake has been conducted. The nematode Rhabdochona macrostoma Moravec & Mikailov, 1970 has been found in the khramicarps intestines. The level of fish infection by nematode is 9 %. The description of the species is giv...
The research has shown rather high fish invasion by helminths. 10 species of the helminths have been found. They are parasites in the body cavity, intestine, the gills and the crystalline lens of fish.
Helminthiases infections in pond carp farms of the Ararat plane have been studied; species composition of helminths is recovered; main helminthiases are revealed; helminthological situation is estimated.
