نتایج جستجو برای: range species
تعداد نتایج: 1168072 فیلتر نتایج به سال:
Livestock grazing is a common human-induced activity with direct and indirect effects even on the ecosystems of protected areas. The present study analyzed the effects of different grazing management methods on species diversity and richness in the steppe rangelands of Saveh, Iran. Data were collected from sixty 2×2 m plots within the areas of three, four-years protected range management projec...
Betanodavirus is one of the two genera making up the family Nodaviridae and is the etiological agent of viral nervous necrosis (VNN, also known as viral encephalopathy and retinopathy or VER). The virus infects a large range of host species in more than 50 species of marine and freshwater fish worldwide from different geographical areas and the known host range continues to expand as new specie...
one of the important factors to make a balance between number of grazing livestock and grazing capacity is whether forage contains sufficient energy and protein during grazing period or not. therefore in this study, forage quality was evaluated for important species in steppe rangelands of changuleh located in ilam province. to do this, samples from four species of hammada salicornia, salsola l...
چکیده به منظور مطالعه مرز سنومانین-تورونین در زون های زمین ساختی ایران مرکزی و کپه داغ سه برش چینه شناسی در این نواحی انتخاب و از آنها نمونه برداری به عمل آمد. در ناحیه ایران مرکزی برش کلاه قاضی و در ناحیه کپه داغ برش های گردنه مزدوران و طاهرآباد ترک انتخاب گردیده اند. مطالعات زیست چینه نگاری بر روی فرامینیفرهای موجود نشان می دهد که برش های ناحیه کپه داغ در بر گیرنده سازندهای آیتامیر و آب در...
Species selection based on a new method such as a fuzzy method is one of the most important stages in the successful plantation management planning as choosing a suitable species for the site can be the key to success. This paper is based on a fuzzy extension of the Technique or Order Preference which is similar to Ideal Solution (TOPSIS) method. The purpose of this paper is to develop fuzzy TO...
The coincidence of climatic and species rarity: high risk to small-range species from climate change
Betanodavirus is one of the two genera making up the family Nodaviridae and is the etiological agent of viral nervous necrosis (VNN, also known as viral encephalopathy and retinopathy or VER). The virus infects a large range of host species in more than 50 species of marine and freshwater fish worldwide from different geographical areas and the known host range continues to expand as new specie...
We defined the basal levels of reactive oxygen species (ROS) in normal donors in neat (whole unprocessed) semen specimens, and in mature and immature spermatozoa isolated by a double-density gradient technique. In addition, we demonstrated that the ROS levels were significantly lower in neat semen compared with washed spermatozoa. The reference values of ROS in neat semen and mature spermatozoa...
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