ali savari

Forecasts indicate a significant increase in population in urban centers. Larger urban centers and metropolitan areas, such as magnets, often attract this population through various forms of migration. This growing flood of migration to large cities, which is usually faster and more intense in third-world countries, creates many problems at the source and destination, including the need for more urban and public services in the destination and the shortage and loss. One of the main destinations of immigrants from villages and small towns is to move to the city center of the province, a big city that acts as a metropolis in the region.One of the provinces in Iran where such migration flows are observed is the West Azerbaijan province, where research on the trends and reasons for the migration of its cities to the center of the province seems necessary. In this research, the following questions have been answered:What has been the process of emigration to the province's center during the period of 85-90 and 90-95?Spatial distribution of migratory data on which of the following spatial distribution patterns was consistent?What factors affect the emigration of the city population to the center of the province?

The present study is a descriptive-analytical research with an applied approach. The data used from library resources such as statistical yearbooks of the province were extracted from the Statistics Center of Iran, and in their analysis, spatial statistics and inferential statistics were used. Spatial statistics analysis is performed in the ArcGIS software environment. In this regard, first, the immigration رده بندی maps of the cities were drawn according to the statistics published by the National Statistics Organization in the two periods of 85-90 and 90-95.Data analysis was performed in two parts: trends and causes of migration. Regarding the migration process of cities to the center of the province, first, by Moran spatial autocorrelation statistics, the type of spatial distribution of migration data was investigated and hot spots of migration were identified by using hot spot analysis. Then, the factors affecting the migration of cities to the center of the province in the form of independent variables were modeled using geographically weighted regression (GWR) analysis.

Salmas city, with 3776 people, had the highest, and Takab city, with 333 people, had the lowest number of emigrants to the center of the province. The rate of emigration from other cities was between these two cities.According to the value obtained for the Moran index, which is positive and significant, the migration data of cities have spatial autocorrelation and cluster spatial distribution pattern and are not randomized or scattered. Hot spot analysis was used to identify places with high-value clustering or hot spots. The results showed that in the period of 90-95, high amounts of emigration in Khoy and Salmas counties had formed hot spots.However, the correlated t-test showed no statistically significant changes in the rate of emigration in the mentioned period. The variables considered and related to the theoretical foundations and research background in the form of geographically weighted regression analysis have been affected by the dependent variable, the migration rate to the province's center. In this regard, five variables of population density, distance of origin and destination, the number of urban services, the urbanization coefficient at the origin, and the number of job applicants at the origin entered the regression model. The model's results were evaluated with goodness of fit (GOF) indicators. The value of R2 for the whole model is 0.773438, and the value of Local R2, for other complications (cities), varies from 0.772427 to 0.773186, which is close to the value of 1, and in general, shows the goodness of the regression model.The regression model has been able to explain about 65% of the changes in the dependent variable. In the next step, by performing Moran autocorrelation analysis on the residual values of the regression model, the residual spatial distribution pattern was investigated; the value of Z obtained for the residual distribution is negative, and no cluster distribution is observed in the residuals, and the residues follow the pattern of random spatial distribution.The effect of each variable on the dependent variable of the migrant was evaluated; the effect of the population density variable in the northern cities of the province was more than in the southern cities of the province. The effect of the origin and destination distance variable is more evident in the south and southeast of the province than in the north. Changes in the effect of the variable number of job applicants at the origin, from northwest to southeast of the province, have an increasing trend. The effect of the urbanization coefficient variable at the origin from north to south of the province shows a decreasing trend. Contrary to the effect of the variable of having urban services at the origin, the trend is increasing from the north of the province to the south and southeast of the province.

In this section, the main research questions were answered. Migrant data has a clustered distribution pattern. The trend of migration of cities to the center of the province during the periods of 90-85 and 90-95, in general, does not show statistically significant changes.Regarding the causes of migration to the center of the province, it can be said that the five variables of population density, a distance of origin and destination, level of urban services, urbanization coefficient at the origin and the number of job applicants at the origin, explain 65% of the dependent variable changes.

The purpose of this study is to evaluate the position of environmental protection indicators in the 11th grade humanities geography textbook and to rank the book chapters based on the mentioned indicators. For this purpose, the texts and images of all book chapters have been selected as a research sample using MAXQDA12 software. Were coded. The research tool is a researcher-made checklist based on Hosseinpoor et al 2019) researchs findings whose validity has been confirmed by content. The stability index has also been used to assess the reliability of the data. Then, in order to evaluate the weight of each of the dimensions of environmental protection in the book, Shannon entropy technique was used, which showed the dimensions of knowledge and awareness of environmental protection, environmental responsibility, interest and participation in environmental protection, respectively. They had the highest to the lowest weight.In the next section, the chapters of the book were ranked based on the dimensions and components of environmental protection using the TOPSIS technique. The results showed that the second, fourth, first and third seasons were ranked first to fourth in this respect, respectively. Environmental protection indicators are not evenly distributed throughout the book.

The aim of this study was to investigate the performance of environmental management in the form of control of industrial effluent pollutants and also to investigate the quantitative and qualitative performance of two industrial wastewater treatment systems (water treatment system and oil recycling). For this purpose, various studies and experiments were performed to measure the amount of quantitative and qualitative parameters of effluent (including COD, DO, pH, TSS, CL-, SO42-, etc.) in the treatment systems of the refinery effluent. In this regard, 4 sampling stations were determined in the study area and were conducted in two seasons, cold and hot, in 2017. The results showed that the clarifying system performed well in all measured parameters except CL- and the ROP effluent treatment system could not meet the values of TSS, COD, SO42-, CL- and turbidity in the hot and cold seasons. Set the limit of international standards for wastewater discharge.

During the early development stages, fish larvae undergo complex changes that result in improved their adaptation to their environment. Shirbot, Arabibarbus grypus, is one of the economical valuable fish in the southwest of Iran due to its high-quality meat and marketing. Hence, the current study was conducted to investigate the morphological changes in its larvae during early development stages up to 50 days post-hatching. The larvae were obtained from the native fish breeding center of Khuzestan Province. Larvae were sampled daily for the first two weeks and then every 5 days until 50 dph. To study the body shape changes of larvae, geometric morphometric technique with the definition of 9 landmark-points was used. Relative warp and regression analysis based on P-value obtained from 1000 replications were used to study the morphological changes during early developmental stages. The changes of morphological stages were visualized based on the deformation grids compared to the consensus one. Based on the results of the geometric morphometric analysis, the larval stages of this species from hatching up to 50 days can be divided into four distinct stages of (1) 1-4, (2) 5-25, (3) 30-35 and (4) 40-50 DPH in terms of morphological changes. The inflexion point of morphological changes was 20 dph. The end of stage 1 coincided with the beginning of exogenous feeding, and stage 2 was more concerned with changes in the body shape, including the increase of the body depth as well as increasing pigment density, especially in the dorsal part of the body, indicating increased fish adaptability for greater maneuverability, camouflage, and increased the ability to prey small organisms. In the third and fourth stages, this species is almost in the form of a miniature form of adult fish, one but with a relatively elongated, fusiform body shape.

The aim of the project is to assay the effectiveness of different values ofLHRH-a2 combined with carp pituitary extract in 3-stages way on reproduction indices of Arabibarbus grypus that belong to Cyprinidae family and is a native fish in Khuzestan province. Fifty individuals of fish in 4 treatments were studied. Control treatment were injected by 4mg/kg pituitary extracts, first treated: 4mg/kg CPE+ 3μg/kg LHRHa2, second treatment: 4mg/kg CPE+7μg/kg LHRHa2 and third treatment: 4mg/kg CPE+ 10μg/kg LHRHa2, that 40 fish were treated by 3-stages and 10 fish by usual way, were studied and the reproduction indices such as obtained egg and alive baby were measured. The results obtained that the weight of obtained egg (692 ± 111.2), relative fecundity (41.9 ± 3.22), fertilization (94.4 ± 0.89), hatching rate (98.2 ± 0.84), larvae number (10912.8 ± 1817.93), alive percent of baby (70.5 ± 2.3) was increased in second treatment (3-stages way) compared to the other treatments (usual way) (p <0.05). Therefore, 3-stages way in the second treatment dose (4mg/kg CPE+7μg/kg LHRHa2) is the best used way and concentration for artificial reproduction of Shabout brood stock.

Anzeh Fish (Barbus esocinus) is one of the species is belonging to family Cyprinidae and Genus Barbus and it is a domestic fish of Khoozestan Province. Considering to internal water resources of the province, overfishing of domestic fish, natural resources of this species has been decreased. This study was conducted to achieve an applicable method in artificial propagation of Anzeh fish. So, 20 Anzeh female brood stocks with mean weight 11.43 kg were randomly selected and distributed among 3 treatment groups and one control group. 4, 7 and 10 µg/kg LHRH-A2 hormone (as preliminary injection) was injected in pectoral area respectively for treatment 1 to 3. 0.5 mg/kg Pituitary Gland Extract (PGE) for second injection and 4.5 mg/kg PGE for final injection. In control group, PGE was only injected in two stages, 0.5 mg/kg for first injection and 4.5 mg/kg for final injection. After incubation period, eggs were collected and fertilization was performed by dry method. Finally, reproduction indexes such as brood stocks response rate, working fecundity, fertilization rate, hatching rate were measured and studied. Based on results, the best reproduction indexes were seen in treatment 2 so that all fish responded to the injection and the reproduction indexes were as follows: response rate: 100%, working fecundity 257240±33658, fertilization rate 96.3±0.47, hatching rate 97±0.67, larval rate: 240400±15315 which were significantly different with other groups (P<0.05). Based on the results obtained from this study, three stages injection method by administration of 7 µg/kg LHRH-A2 hormone (as preliminary injection) and two injection of PGE ) for second injection and 4.5 mg/kg PGE can be used for successful artificial propagation of this domestic fish.

To evaluate the effects of Glycine Betaine (GB) on yield and seed quality of some cotton (Gossypium hirsutum L.) cultivars in response to drought stress, a field experiment was conducted in northern part of Iran, Gorgan. The experiment was a factorial on the basis of a randomized complete block design with four replications. Field research survey consisted of two factors; GB concentration and cotton cultivars. Glycine Betaine was applied to filed-grown cotton at three rates: 0 kg/ha foliar application of GB at the first flowering + application at one and two weeks later, 3 kg/ha foliar application of GB at the first flowering + application at one and two weeks later (two times GB application) and 6 kg/ha foliar application of GB at the first flowering + application at one, two, three and four weeks later (four times GB application). Four cotton cultivars were selected based on their proportional susceptibility to drought stress including Tabladilla and Nazili, considered as drought tolerant, and Varamin and Sahel, considered as drought sensitive cultivars. The results showed that spraying with GB at different levels (3 and 6 Kg/ha) enhanced cotton yield, boll numbers, sympodia branch numbers, early maturity, plant height, final node on main stem, boll retention at 2nd position and boll abortion, seed bulk density, but had no significant effect on monopodia branch numbers. This research could ultimately result in higher yield production and improved tolerance to water deficit condition with applying following treatments: Tabladilla and Nazili with 3 kg/ha foliar application of GB at the first flowering + application at one and two weeks later for tolerant cultivars and Varamin and Sahel with 6 kg/ha foliar application of GB at the first flowering + application at one, two, three and four weeks after first flower.