نتایج جستجو برای: r kutum
تعداد نتایج: 447294 فیلتر نتایج به سال:
In the present study, the primary cell lines were derived from caudal fin explants of the Caspian Kutum (Rutilus frisii kutum), using two treatments (tissue culturing without enzyme and after trypsin treatment). For this purpose, pieces of caudal fin tissue (1 millimeter cubic) were isolated from 10 healthy young fish with an average weight of 12±1 g and a mean length of 11±1cm in sterile condi...
A feeding trial has been conducted to evaluate the effects of dietary nucleotide (NT) on growth performance and stress resistance of fry kutum (Rutilus kutum Kamenskii, 1901). A basal diet supplemented with 0 (control), 0.3, 0.5 and 0.7 g NT kg-1 have been formulated for four experimental diets. After 8 weeks of feeding trial, growth parameters were evaluated and then fish has exposed to osmoti...
Hybrids were produced by crossing female Caspian kutum Rutilus frisii kutum with male grass carp Ctenopharyngodon idella. The genome of eight larvae and parents were studied using microsatellite markers for genetic evaluation and verification. After DNA extraction from parent fish and progeny, hybrid heritability of two loci was assessed using two pairs of microsatellite primers. Hybridizie...
During 2019, the length-weight, length-length relationships and condition factor of Caspian kutum, Rutilus kutum (Kamensky, 1901) were studied by catching a total of 339 specimens were collected from Chelvand, Khalehsara, Sefid, Khoshk and Shir rivers, Anzali Wetland and Turkmen Shores of the Caspian Sea basin. The equation W =aTLb was used to calculate the length-weight relationship, FL=a + b...
It is shown that for a metric space (M,d) the following are equivalent: (i) M is a complete R-tree; (ii) M is hyperconvex and has unique metric segments.
We present a new spatial index belonging to R-tree family. Since our new index comes out from the R-tree and holds the concept of nonoverlapping nodes we call it R-tree. The original R-tree was designed for both point and spatial data. Using R-tree for indexing spatial data is very inefficient. In our research we face the problem of indexing product catalogues data that can be represented as po...
R-tree based access methods for moving objects are hardly applicable in practice, due mainly to excessive space requirements and high management costs. To overcome the limitations of such R-tree based access methods, we propose a new index structure called AIM (Adaptive cell-based Index for Moving objects). The AIM is a cell-based multiversion access structure adopting an overlapping technique....
A new dynamic multi-dimensional index structure called RSR-tree is proposed, in which splitting operations of leaf nodes and non-leaf nodes are performed separatively. RSR-tree retains the sequence ordering of index records in a leaf node of RS-tree and thus reduces the addressing time cost of disk access while reading data files. In addition, it integrates the characteristic of reducing the ov...
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