Grey Mullet (Mugil cephalus) is an important food fish species in the, Mugilidae which is able to adapt in a wide range of salinities and temperatures and is suitable for introduction of the species to freshwater, brackish, and brine waters for aquaculture. This study was implemented to determine appropriate normative of stocking density and initial weight ofMugil cephalus and also evaluate eff...

Diatoms of Gomishan wetland (Golestan province, N. Iran), one of the most significant habitats in the eastern shore of the Caspian Sea, has been isolated, purified and identified during 2013. Using serial dilution and streaking on F/2 medium, pure, monoalgal and axenic cultures of the isolates were prepared. The isolates were characterized and identified using micro-morphological studies on the...

every year a large number of migratory wintering water birds, rest in the wetlands situated in the northern provinces of iran. the wetlands are very important ecosystems for these creatures. due to ecological importance of water birds, the results of this study (the birds’ populations and their changes) are helpful to monitor them and are especially important to manage the wetlands. in this stu...

in order to determine the diet of dalagh sheep, winter rangeland of gomishan plain was selected. after delineating of the grazingland territory, rangeland condition and plant combination was determined by range value method and range trend was obtained by trend balance method. time of bite-count record was done in morning and afternoon in a five-day period; first week of november (1389) and las...

there are 61 species in 14 families of fish-eating birds in iran. the fish-eating birds of the north of iran belong to 41 species in 10 families which include 67.2 percent of total fish eating bird species and 71% of fish-eating bird’s family of iran. resident birds constitute 13% of the fisheating birds of the caspian sea coasts and the rest are migratory in autumn and winter. there exist 3 ...