H. Negarestan

Islamic Azad University North Tehran Branch, Fishery Engineering, Faculty Member

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I am a PhD in the field of marine biology with special interest in aquatic ecology. I worked on invasive species and worked at managerial level on combating invasive comb jelly of Caspian Sea and combating extraordinary red tide of Persian Gulf. I am also a fisheries scientist and am interested in management of fish stocks in order to evade over exploitation.

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Evaluation of photosynthetic products (phytoplankton) in the major estuaries of the southern Caspian Sea

Due to various Physic and chemical factors of rivers leading to the sea, the situation seems diff... more Due to various Physic and chemical factors of rivers leading to the sea, the situation seems different topography and throughput rate initial productions in the different seasons and due to various circumstances physical and chemical rivers leading to the sea, seabed topography in different situation appears to be of primary production in the eastern and western between the Caspian Sea in the season, may be altered.Identifying species and determining the distribution and biomass of the changes and how they are affected by environmental changes and we are environmentally conscious. We also compare the current situation with previous studies, we find that the number and types of plankton biomass have been what it is. During 1392 in spring, summer, autumn and winter, in a study of 8 transects of 40 stations. In each transect from Astara to the Turkmen. 5 stations at depths of 5. 10 and 20 m were selected for sampling. The total number of 182 species from seven branches Bacillariophyta,...

Monitoring of Artemia stocks in Urmia lake

Monitoring of Artemia Stock in Urmia Lake ( with less than 5 billion m^3 ), between 2001-2003 in ... more Monitoring of Artemia Stock in Urmia Lake ( with less than 5 billion m^3 ), between 2001-2003 in order to survey of Artemia population dynamic and some water abiotic factors such as WT , salinity and transparency using Thermometer, refractometer and secchi disk, were done monthly. Phytoplankton with Rotner sampling device and Artemia (different life stages) were sampled by planktonic net from 7 suit stations(3 layers, surface, 2.5 and 5 meters with 3 replications) which were selected from 12 sites used in previous Artemia stock assessment project Graphs drawed by excel software in different layers , months and separation between north and southern parts of the Lake(±SD ,SE), showed WT fluctuated from 3 degree centigrade in December 2001 to 29 degree in November 2003 with the same changes in different layers. Salinities from 290 ppt in autumn 2001 to 340 ppt in summer of 2003 increased. Northern part of the lake had higher salinity than the southern. There were not any differences be...

H. Negarestan

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