مقالات رزومه زانیار غفوری

This study was conducted to investigate the sexual dimorphism of Cyprinion macrostomum in the Little Zab River using traditional and geometric morphometric methods. For this purpose, during 2021, 37 specimens (21 females and 16 males) were collected using an electrofishing device. After determining the sex of the collected specimens, 18 morphometric characteristics were measured using a digital caliper. Also, to extract body shape data in geometric method, photographs were taken from the left sides of both males and females. Then, 16 landmark-points were digitized in tpsDig2 software. The extracted data were analyzed using multivariate statistical analysis including principal component analysis (PCA), T.tests and Mann-Whitney.The results of discriminant function analysis (DFA) and T-test of the body shape showed a significant difference between males and females (P<0.05). The males have more body depth, posterior snout, and shorter caudal peduncle length than the females. Males and females had significant differences in 8 morphometric traits (P<0.05). The results of the  present study confirmed the performance of traditional and geometric morphometric methods in the differentiation of the C. macrostomum sexes.

In the conservation programs of aquatic ecosystems and fish stocks, understanding of the habitat preferences of aquatic species play an important role. In this regard, the study was aimed to investigate the habitat preference and habitat suitability index (HSI) of Chondrostoma regium in its distribution range in Zab River. A number of environmental variables, including pH, temperature, EC, TDS, elevation, water depth, river width, river slope, flow velocity, and substrate type, along with the abundance of C. regium at 6 stations (each with three replication) from the downstream to upstream were recorded seasonally from the fall of 2021 to the summer of 2022. The results showed that habitat suitability of C. regium is different in four seasons and this species prefers habitats with pH in a range 9-10, high temperature, low altitude, low bed slope, moderate velocity, and gravel and slate beds without vegetation, and these environmental factors were almost similar during the four seasons of the year. But EC, TDS, river width and water depth preferences were different in different seasons. In spring, it prefers with greater width and depth, and in summer and autumn, habitats with lower width and depth. EC and TDS were lower in spring and summer and relatively higher in autumn and winter due to seasonal changes. In general conclusion, the little Zab River is moderately suitable for C. regium.

Knowledge of habitat requirements of aquatic animals plays an important role in fisheries and protection programs of aquatic ecosystems. Hence, this study was conducted to investigate the suitability indices of habitat use and habitat suitability index (HSI) of Cyprinion macrostomum in its distribution range, Zab River. A number of environmental variables, including pH, temperature, EC, TDS, elevation, water depth, river width, river slope, velocity, substrate type, and the relative abundance of C. macrostomum at 6 stations and three replications from the downstream to upstream were examined during from the fall of 2021 to the summer of 2022. The results showed that habitat suitability of C. macrostomum is different during four seasons and this species prefers areas with pH in the range 9-10, high temperature, low altitude, low bed slope, medium velocity, and gravel and slate beds without vegetation, and these environmental factors expressed during the four seasons of the year are almost similar. But EC, TDS, river width and water depth factors are distinct in different seasons and it prefers different ranges of these factors during the seasons. In spring and summer preferred the lower width and depth of the river, and in winter and autumn seasons preferred the width greater and depth higher of the water.

In the present study, the morphological variation and some biological parameters (growth pattern and condition factor) of 46 specimens of Chondrostoma regium collected from the Gamasiab, Dinevar, Qarasu and Zab rivers were analyzed. A total of 22 morphometric and 6 meristic characteristics were measured and counted, respectively. To investigate the morphological variations between studied populations, morphometric and meristic characteristics were analysed using One-way analysis of variance, Kruskal-Wallis, Principal Component Analysis (PCA), and Canonical Variates Analysis (CVA). The results showed that 16 morphometric and 5 meristic characteristics had significant differences (P<0.05). CVA analysis of morphometric traits showed that the populations had a high overlap and only the Zab River was separated from others, also in those meristic, Zab populations were separated from each other. Based on the results, C. regium showed significant morphological differences in meristic and morphometric discriminability characteristics. The growth pattern was isometric for Gamasiab, Dinevarr, and Qarasu populations but positive allometric for the Zab population. The condition factor was determined between 0.97 (Zab) and 1.06 (Dinevar), and there were no significant differences found between the studied rivers.

This study was conducted to investigate the morphological patterns of Alburnus sellal in the sub-basins of little Zab and Sirvan rivers, Tigris river drainage using geometric morphometric method. A total of 110 specimens (60 from the little Zab River, West Azerbaijan province and 50 from the Sirvan River, Kurdistan Province) were caught using an electrofishing device. Using TpsDig2 software, 14 landmark-points were defined and digitized on the 2D images of the specimens. The data was analyzed and compared using multivariate principal component analysis (PCA), discriminant function analysis (DFA) and Hoteling t-test. The results of the DFA confirmed the morphological separation of the studied populations. Wireframe based on the consensus body shape was separated the two populations based on the head size, body depth and caudal peduncle length charatrestics. The results of this study showed a habitat-dependent morphological plasticity of A. sellal. The results showed a habitat-dependent morphological plasticity of A. sellal.

Capoeta sevangi is a native species of the Cyprinidae family in the Caspian Sea basin (Arass River) and is ecologically and economically important. The main purpose of this study to investgate the relationship between absolute and relative fecundity with length, weight and age of this species in the Arass River and sampling was carried out from March to June 2012 using cast-net and gill-net. The result of the study on 72 female specimens of previous stages to prepare spawning showed that the absolute fecundity of this fish is 3056 to 21213 (10590.7±4085.0) eggs and the relative fecundity is 23.5 to 98.3 (41.1±11.9) eggs per gram of body weight and the egg diameter is 0.95 to 1.85 mm measured

Acanthobrama urmianus is an endemic species of Cyprinidae family in the Urmia Lake basin and important for ecological and sport fishing. The main purpose of this study was to investigate the relationship between the fecundity with length, weight and age in two rivers of Mahabadchai and Siminerud and sampling was carried out from December to June using cast-net and gill-net. The result of the study on 107 female fish specimens from maturity stages 4 and 5 showed that the absolute fecundity of this fish is 1567 to 27228 (11954.3±6991.9) eggs with a diameter of 0.35 to 1.42 and the relative fecundity is 87.9 to 633.9 with an average of 282.6±120.7. Also, with increasing age and size of the fish body, the absolute fecundity increased. Between the absolute fecundity and the total length of equation F= .0034TL 3.545 (r2=.789) and between the absolute fecundity and the weight of the equation F=23.272W1.665 (r2=.766) obtained. The results showed that the rate of fecundity in Mahabadchai in the constant length range was less than Siminerud River.