caspian journal of environmental sciences
Papers
572
Papers 572
1 page of 58 pages (572 results)
#1Javid Imanpour Namin (University of Guilan)H-Index: 7
#2Kam Safarbibi (University of Guilan)
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The environmental effects of fish cage culture have poorly been studied in reservoirs. Since this activity is increasingly practiced, investigations on the impacts of cage culture on physicochemical parameters and biodiversity of the reservoir is imperative. The aim of this study was to study the effects of rainbow trout cage culture on water quality, as well as plankton population structure and communities in a reservoir (Golestan Reservoir 1, Gorgan, Iran). Four sampling stations were selected...
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#1Shima Bakhshalizadeh (University of Guilan)H-Index: 4
#2Botagoz Murasovna Nasibulina (ASU: Astrakhan State University)H-Index: 1
Last. Leonid Alexandrovich Zykov (ASU: Astrakhan State University)H-Index: 1
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One of the fundamental hypotheses in aquatic ecology deals with the recognition of fish stocks. The present study tested the spatial dynamics of starry sturgeon stocks across environmental gradients by spatial variability in strontium to calcium in the pectoral fin spine. Forty samples of starry sturgeon were collected from the north and south of the Caspian Sea. A quantitative method was used to examine stocks using digested pectoral fin spine, reflecting habitat characters of fish. Parts of pe...
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#1Irina Melnik (ASTU: Astrakhan State Technical University)
#2Ekaterina Vasil'eva (ASTU: Astrakhan State Technical University)
Last. Olga Valentinovna Obukhova (ASTU: Astrakhan State Technical University)H-Index: 1
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Water bodies of the delta part of the Lower Volga are extremely important for preservation of biodiversity as feeding and breeding grounds for valuable fish species, including sturgeon species. Meanwhile, the anthropogenic load on these water ecosystems is increasing alongside the growth of oil and gas industry. Thus, the aim of this study is to dynamically assess the pollution of water bodies of the prime grade of fishery importance with petroleum products throughout 2014-2018. The objects of t...
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#1Sharareh Sharafkhah (IAU: Islamic Azad University, Tehran)
#2Roghayeh Oskoueiyan (IAU: Islamic Azad University, Tehran)H-Index: 3
Last. Alamara Gholami (IAU: Islamic Azad University, Tehran)
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Klebsiella pneumoniae is a member of the Enterobacteriaceae family which plays an important role in creating various infections in the community. These strains are resistant to multiple β-lactam antibiotics due to the production of β-lactamases enzyme (ESBL). The purpose of this study was to assess the phenotypic and genotypic characteristics of ESBL-producing K. pneumoniae strains from clinical specimens in three hospitals in Mazandaran, Iran. In this cross-sectional study, K. pneumoniae sample...
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#1Nawras Abdul Kareem (University of Babylon)
#2Nuha Falih Kadhim (University of Babylon)
The current study was conducted to investigate the biochemical response of two plant species including Lemna minor and Ceratophyllum demersum as indicators for the treatment and reducing the concentrations of dissolved inorganic nitrogen compounds in wastewater collected from a domestic water treatment plant in Al-Maamera area in Babil Governorate, Iraq. The experiment included the cultivation of aquatic plants in 20-liter plastic basins, which contain domestic water collected from the sedimenta...
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#1Rishat A. Migunov (Moscow State Agroengineering University named after V.P. Goryachkin)
#2Rafkat S. Gaysin (Moscow State Agroengineering University named after V.P. Goryachkin)
Unrelated agricultural support is one of the equitable agricultural support mechanisms in developed countries. This paper describes the rules for unrelated support in the Federal Republic of Germany and in the Russian Federation. We proposed various institutional mechanisms to transform the system of rules for unrelated support in the Russian Federation to ensure sustainable long-term growth of the domestic agricultural sector.
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The peculiarity of nitrogen nutrition for legume-cereal mixtures is that due to the intravital transfer of mineral nutrition elements from the legume component of the mixture to the cereal component and vice versa, the cereal component receives nitrogen from the air symbiotically fixed by the legume component. This explains its better development in the mixture than in single-species sowing without the use of nitrogen fertilizers. In unfavorable conditions for legume-rhizobial symbiosis, when th...
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This study presents the results of ensiling technology of the aboveground mass of corn both in pure form and with flat grain of soybeans or its green in order to provide canned fodder with digestible protein up to the zootechnical norm for high-intensity livestock farms. The study was carried out on the reclaimed lands of the Non-Chernozem zone on the basis of the livestock farm OJSC "Agrofirm Dmitrova Gora" of the Konakovsky district of the Tver region. They used the soybean variety of the nort...
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This article presents the results of a field experiment on obtaining environmentally friendly products from sugar and fodder beets in conditions of zinc contamination. It was found that various intensification factors during the cultivation of sugar and fodder beets significantly change the agrochemical and agroecological properties of sod-medium podzolic sandy loam soil. The zinc content in sugar and fodder beets was almost two times lower within the treatments with the simultaneous introductio...
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This paper presents the results of studying the role of cultivation background intensification in the formation of productivity and yield structure of spring wheat varieties Novosibirskaya 29, Novosibirskaya 41, Novosibirskaya 15 and Altayskaya 75 in the subtaiga zone of the Krasnoyarsk Territory, Russia. The influence rate of crop rotation steam link using a full range of modern means of protection and fertilization on the elements of the yield structure of soft spring wheat and its variations ...
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