نتایج جستجو برای: rutilus rutilus caspicus
تعداد نتایج: 1051 فیلتر نتایج به سال:
study of the osteological development in fishes is important from fisheries, biology and aquaculture points of views. it can be used as an early bio-indicator of non-optimal rearing conditions. the caspian roach, rutilus caspicus is a native cyprinid fish of the caspian sea that its artificial propagation has fulfilled in hatcheries to recruit its natural stocks. hence, this study was conducted...
Aula Abbara, Adam Coutts, Fouad M Fouad, Sharif A Ismail, Miriam Orcutt; the Syria Public Health Network National Heart and Lung Institute, Imperial College London, London, UK Department of Politics and International Studies, University of Cambridge, Cambridge, UK Faculty of Health Sciences, American University of Beirut, Beirut, Lebanon Department of Primary Care and Public Health, Imperial Co...
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widespread use of nanosilver can be led the contamination of aquatic environment and impact on living organisms such as fishes. we investigated histopathological changes in the gills tissue of caspian roach fingerlings after two weeks exposure to sublethal concentrations of nanosilver. following one and two weeks exposure, necrosis, shortening of secondary lamellae, edema, destruction of epithe...
rearing conditions such as density, temperature, water quality, and frequency of feeding are among the most important factors affecting fish growth in aquaculture. therefore, this study was done to evaluate effects of interaction between temperature and feeding frequency on the growth of juveniles caspian roach weighting approximately 0.5 ± 0.05 g during 45 days. juvenile fish were reared at fo...
It has long been hypothesized that chromosomal rearrangements play a central role in different evolutionary processes, particularly in speciation and adaptation. Interchromosomal rearrangements have been extensively mapped using chromosome painting. However, intrachromosomal rearrangements have only been described using molecular cytogenetics in a limited number of mammals, including a few rode...
A field isolate of pike fry rhabdovirus (PFR-80560) isolated from roach was tested for pathogenicity in fry of roach Rutilus rutilus L., common carp Cyprinus carpio L., grass carp Ctenopharyngodon idella Valenciennes and rainbow trout Oncorhynchus mykiss Richardson. The fish were experimentally exposed to the virus by immersion in a virus-seeded water-bath. We also compared the pathogenicity of...
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