نتایج جستجو برای: 1840) population in downstream bahmanshir river during summer
تعداد نتایج: 17291067 فیلتر نتایج به سال:
this study was conducted to investigate some aspects of the reproductive system of exopalaemon styliferus (h. milne edwards, 1840) population in downstream bahmanshir river during summer, 2008. a total of 472 specimens collected from sampling site?? stations, males and females comprised 55.4% and 43.6%, respectively (14.4% ovigerous female and 30.1% non-ovigerous females). the minimum size of m...
Precise study of geophysical and ecological characteristics of benthic habitats is very important, because the seabed type of these habitats has close relationship with presence or absence of particular benthic species as well as with their distribution in the benthic communities. The aim of this study was Investigation of Relationship between Ecogeomorphology and Granulometry of Bed Sediments ...
Bahmanshir River with 80km length is located in the southwestern Khuzestan Province, Iran. The seasonal distribution of phytoplankton community in spring and summer of 2007 was investigated. The river presented different characteristics between the periods of high & low water (tidal). Within tidal period, diatoms were dominated followed by Cyanophyceae and Chlorophyceae. As a result, abundance ...
the determination of temporal and spatial salinity in tidal rivers is significant in supplying water for agriculture purposes, particularly where there is no controller dam at the downstream. in this research, the coherens model was applied to study the hydraulics of water flow, salinity distribution and transmission at the bahmanshir river. coherens is a 3d multi-purpose hydrodynamic model whi...
Background & Aims : Right branch of Sarugh River is the main river in Takab city, north western Iran, which is located at downstream of present gold extraction plants. Cyanide leak aging from tailings dams of plants is a serious threat to the health of river. This study was conducted to evaluate Cyanide concentration and transferring cyanide to the river. Materials & Methods : In this cross...
Microzooplankton plays an important role in aquatic food web and they act as trophic intermediates between the phytoplankton and higher trophic levels. The purpose of this investigation was to study the ecological situation of bahmanshir base on biological indexes calculation. Biological indexes of zooplankton in coastal region of bahmanshir waters were investigated. Samples were collected usin...
Elevated stream temperature is a primary factor limiting the coho salmon (Oncorhynchus kisutch) population in California’s Shasta River Basin. Understanding the mechanisms driving spatial and temporal trends in water temperature throughout the Shasta River is critical to prioritising river restoration efforts aimed at protecting this threatened species. During the summer, the majority of stream...
In late summer and fall, radio-tagged adult Sacramento pikeminnow (Ptychocheilus grandis) at three sites in the Eel River of northwestern California moved more at night than during the day. Fish moved up to 535 m at night and returned to their original positions the following morning. Adult Sacramento pikeminnow at all sites occupied only pools during the day, but at one site moved through high...
Background and purpose: Quality of surface waters is important for different uses and identification of contaminated sites and pollutants leads to appropriate use of water. So, the aim of this study was to evaluate the quality of water Babolrood. Materials and methods: In this cross-sectional study, sampling was conducted in ten stations during summer 2013. Data was analyzed using National S...
background & aims of the study: heavy metals contaminate drinking water, air and soils. it is very harmful for humans and other live organisms. phytoremediation is one of the direct bio-remediation methods for heavy metal removal from polluted water and soils. this method is accepted environmentally, economically and aesthetically. the purpose of this study was to assess tamarix hispida capacit...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید