sara yalpaniyan

Nowadays, use of ecosystem health indicators, such as aquatic invertebrates, fishes and birds, has received growing attention to quickly assess of ecosystem health due to their properties such as saves time, energy and costs. Therefore, this study was conducted to investigate the correlation among presence and density of the Cinclus cinclus and physico-chemical parameters of some riverine systems of Tehran and Hamedan provinces in 2015. In so doing, presence points and the number of individual birds were detected by direct observation and/or finding its signs and tracks along riversides. Then, some physicochemical properties of water (i.e. temperature, dissolved oxygen, electrical conductivity and pH) and richness and abundance of macrobenthos were investigated in the presence points of dipper. Also, all statistical analyses were performed using the Minitab and STATISTICA statistical software's. Based on the results of ordinal regression analysis and AIC, significant correlations were found between electrical conductivity, macrobenthos abundances as well as water temperature and the presence and density of the dipper. Therefore, it seems that our results revealed a good relationship between the presence and the density of the dipper and water quality in the studied riverine systems.

Podoces pleskei is from crow family and belongs to the genus of ravens land or runners. The distribution of this species in Iran to isolated patches in desert and semi-desert areas that is limited to Central and East of Iran .There are concerns because of the isolation of populations that due to dangers such as inbreeding, genetic drift and so etc. The aime of this study is to compare some morphological characteristics of isolated populations of Podoces pleskei in the provinces of Semnan and Yazd. For this purpose, eight morphological variables were choose from foot and mouth organs for 21 chickens in the Marvast Herat region in Yazd province and four numbers of chickens measure from Protection Complex of Touran.Then all these data were standardized by dividing the cube root of body weight. To normalize these data were used the logarithm of deformation. Also,T-test was used to compare the measured variables between individuals of the populations of Marvast Herat of Yazd and Touran. The results showed that the chicks and adults in the two areas have significant differences in beak length and width variables. Also, the size and form of nutritional devices Podoces pleskei in these two areas have significant differences in the immature and mature which can be associated with diet and food habits search for them in these two areas and is also used as prey size that demands complete studies for comparative study of diet and eating habits of the two provinces in different seasons.