Showing 6 results for Gholizadeh
Mohammad Gholizadeh, Sepideh Eizadi,
Volume 8, Issue 3 (Winter 2019)
Abstract
One of the problems for rivers and streams in Iran is related to dispersal of the waste effluents from trout farms. The aim of this study was to assess the effects of trout farm effluents on Zarin-Gol stream using macrobenthos communities, Helsenhoff, BMWP and ASPT indices. Sampling of macroinvertebrate was performed in six stations (entrance of fish farm, discharge and 500 far from fish farm) in three replicates using surber sampler in winter and spring, 2016. The number of total abundance of macroinvertebrate were counted 2179 belonging to 8 order, 30 families and 15 genus. The results showed that the trout farm effluents had significant effects on nitrite and dissolved oxygen. The highest value of BMWP and ASPT was obtained in station 1 in winter season, while the lowest value was obtained in stations 2 and 5 in spring season, considered asthe middle class in terms of water quality. The maximum value of Helsenhoff index was observed in station 2 (5.31) in winter season, considered as relatively weak class in terms of water quality. The result of indices showed a decrease in macrobenthos sensitive to pollution, and stations located after trout farms were more polluted than those located before farms, indicating lower water quality.
Ali Shobeiri Dozeini, Eisa Jorjani, Amir Vazirizadeh, Rahman Patimar, Mohammad Gholizadeh,
Volume 8, Issue 4 (ُُSpring 2019)
Abstract
In this research the presence of
Gnathia sp
. species and its ecological structure in coastal mangrove Mel-e-Gonzeh at conserved area of Mond in Bushehr province was investigated using methods for studying benthoses. For this purpose, three stations with three tidal levels were selected in coastal mangrove and sampling was carried out in four seasons using quadrat method. The density of species was 88 ind/m
2 in station 3 (low tide), exclusively on tidal pools formed by the coastal microcliffs in autumn. Among them, 44% of individuals were Zuphea larvae, 41% were Praniza larvae,10% were adult males and 5% belonged to female. Station 3 was formed with 28.58% silt and 54.36% sand and showed the highest amount of organic carbon with 0.54% among all the stations and seasons. This research showed that sediment structure of these small local habitats are influenced by seasonal variations that can change the distribution of this organism.
Komeil Gholizadeh, Majidreza Khoshkholgh, Bahram Falahatkar,
Volume 8, Issue 4 (ُُSpring 2019)
Abstract
The aim of this study was to assess the effects of different doses of zero-valent iron nanoparticles in the diet of common carp fingerling on growth performance, proximate composition, and biochemical blood parameters. For this purpose, 150 fish with an average initial weight of 6.14 ± 0.10 g were fed on the experimental diets for 8 weeks. The diets contained 0, 50, 100, 150 and 200 mg/kg zero-valent iron nanoparticles. Based on the results, fish were fed the diet supplemented with 150 mg/kg zero-valent iron nanoparticles displayed significant difference in final weight, weight gain, final length, specific growth rate, body weight increase, average daily growth, feed efficiency, protein efficiency ratio and lipid efficiency ratio (P<0.05). The hepatosomatic index was the highest in the NI
0 treatment (P<0.05). Dietary nano-iron had no effects on proximate composition (moisture, ash, and protein) of common carp fed different diets (P>0.05), whereas the fat content of fish fed by 50 mg/kg zero-valent iron nanoparticles was significantly higher compared to other experimental diets (P<0.05). Fish fed by 150 mg/kg zero-valent iron nanoparticles showed significantly higher total protein, but the highest alkaline phosphatase activity in plasma was found in fish fed 50 mg/kg zero-valent iron nanoparticles (P<0.05). No significant differences were observed in glucose content among different groups (P>0.05). Based on the results, 150 mg/kg zero-valent iron nanoparticles in the diet has more influence than larger scales due to the increased surface to volume ratio and can be recommended in diet of common carp fingerlings.
Armin Foomani, Mohammad Gholizadeh, Mohammad Harsij, Mohammad Salavatian ,
Volume 8, Issue 4 (ُُSpring 2019)
Abstract
This study was conducted to investigate spatial and temporal changes in benthic macroinvertebrates communities in Shanbeh-Bazaar River leading to the Caspian Sea. Sampling was carried out in four stations with three replicates using Hilsenhoff Rapid Bioassessment Family Biological Index (HFBI) in 2017. Totally, 3963 macroinvertebrate belong to 3 phylum, 5 class, 9 order and 19 families were identified. The maximum abundance was recorded in spring and the minimum abundance was observed in summer with 2137±186 and 83±19 individual benthos, respectively. The lowest and the highest was abundance observed in stations 1 and 4, respectively. According to the MDS analysis, the distribution of macroinvertebrate showed three distinct groups among stations. The water quality of Shanbeh-Bazaar river for all the stations was very poor except for station 1 (7), based on Hilsenhoff index water quality guideline. The results showed that the increased organic matter due to agricultural activities, adjacent urban and rural wastewater and transport of cargo ships caused an increase in the abundance of pollution resistant benthos including Tubificidae and Chironomidae, which indicates low water quality in this area.
Manijeh Ghazlikor, Mohammad Gholizadeh, Hosein Adineh, Mohammad Harsij, Abdolazim Fazel,
Volume 12, Issue 3 (Autumn 2022)
Abstract
In this study, the trophic status of the Bustan dam reservoir was investigated using Palmer and Carlson indices. Biological parameters including phytoplankton and environmental factors such as phosphate, nitrate and chlorophyll were sampled at the depth of 0.5 meter in five stations in three replicates seasonally in 2019, repetitions and Then the Palmer and Carlson indices were determined. The Palmer index in Bustan dam was estimated as 24, 31, 27.6, and 28.8in spring, summer, autumn, and winter, respectively. According to the Palmer index classification, in all four seasons, Bustan dam water is in the category of water with high organic matter. The highest value of Palmer's index was obtained in summer (31) and its lowest value was obtained in spring (24). The highest nutritional status of Carlson's index was related to summer (60.46 eutrophication) and the lowest level was found inwinter (52.44 eutrophication), which indicates that the reservoir has moved to semi-nourishing condition in winter season. Also, the highest nutritionism status was observed in station 3 (54/23). According to Palmer's and Carlson's indices and the ratio of phosphate to total nitrogen, the main factor of nutritionism in the reservoir of Bustan dam was phosphorus compounds that enteres the reservoir from external sources of the dam and ultimately causes the decrease of water quality.
Msc Arsalan Bahalkeh, Dr Rahman Patimar, Dr Mohammad Gholizadeh, Dr Ziya Kordjazi, Dr Seyed Mostafa Aghilinejad,
Volume 14, Issue 3 (Autmn 2024)
Abstract
To investigate the relationship between the length and weight of Neogobius melanostomus, 5145 fish were captured using nets from March to February 2018. The maximum total length and weight for females were recorded at 12.2 cm and 28.08 grams, while for males, the maximum total length and weight were 11.3 cm and 33.17 grams, respectively. The length-weight relationship for both female and male populations of N. melanostomus in Gorgan Bay across the four seasons (spring, summer, autumn, and winter) showed a high coefficient of determination. The regression slope values (b) for this species in different seasons were significantly different from the isometric growth coefficient of 3 (p < 0.05). Specifically, the t-values were 3.73 for the winter population, 10.80 for the autumn population, 21.25 for the summer population, and 21.71 for the spring population, indicating positive allometric growth throughout the year. The Pauli test confirmed this growth pattern in the N. melanostomus population of Gorgan Bay. Seasonal condition coefficients showed that females had the highest values in summer and winter, while males displayed the highest values in winter.
