قلی زاده, محمد

[ 1 ] - اثر پساب کارگاه‌های پرورش ماهی قزل‌آلای رنگین کمان (Oncorhynchus mykiss) بر بی‌مهرگان کفزی رودخانه اسفیدان (خراسان شمالی)

ورود پساب پرورش ماهی باعث بر هم زدن تعادل اکوسیستم نهرها و رودخانه‌ها و تغییر در فراوانی بزرگ بی‌مهرگان کفزی می‌شود. در این تحقیق برای تعیین اثرات پساب مزارع پرورش ماهی قزل‌آلای رنگین کمان بر فراوانی بزرگ بی‌مهرگان کفزی در رودخانه اسفیدان (استان خراسان شمالی) نمونه‌برداری در فصل تابستان از 4 ایستگاه انجام گرفت. طی بررسی از بزرگ بی‌مهرگان کفزی 12 راسته و 24 خانواده شناسایی شد. بیشترین فراوانی کف...

[ 2 ] - بررسی ویژگی‌های زیستگاهی انتخابی سگ ماهی جویباری Paracobitis hicanica (Mousavi-Sabet et al., 2015) در رودخانه زرین گل، استان گلستان

گونه‌های ماهی یک زیستگاه خاصی که نیازهای زیست محیطی آن را فراهم می‌کند را ترجیح می‌دهد، از این رو درک استفاده از زیستگاه و ترجیحات آن‌ها برای حفاظت و مدیریت کارا بسیار مهم است. این مطالعه برای ارزیابی زیستگاه انتخابی سگ ماهی جویباری Paracobitis hicanica ، ماهی بومی رودخانه زرین گل انجام گرفت. نمونه‌برداری از 12 ایستگاه در طول رودخانه در فصل بهار 1395 صورت گرفت. بدین منظور متغیرهای محیطی از جمله...

[ 3 ] - بررسی اکولوژیکی دیاتومه های رودخانه چهل چای استان گلستان

دیاتوم ها گروهی از جلبکها هستند که در زیر میکروسکوپ نوری به رنگ‌های زرد قهوه ای و با دارا‎‎‎ بودن یک دیواره سیلیسی ضخیم شناسایی می‌شوند. این موجودات ترجیحات و تحمل اکولوژیکی مشخصی دارند که آنها را شاخصهای مفیدی برای شرایط اکولوژیکی ساخته و امروزه بطور گسترده ای در بحث کیفیت آب بکار می روند. رودخانه چهل چای یکی از سرشاخه های بزرگ گرگان رود می باشد. در مطالعه حاضر دیاتومه های اپی لیت و اپی پل این...

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[ 5 ] - Investigating the density and frequency of zooplankton in the Southeastern Basin of the Caspian Sea (Gorgan Bay)

Zooplanktons have an important role in food chain of the aquatic ecosystems, which acts as a food chain link between producers (phytoplankton) and higher nutritional levels. The purpose of this research was to identify and study the zooplankton density in the southeastern basin of the Caspian Sea (Gorgan Bay). Sampling was performed seasonally and samples were collected by zooplankton net (36 c...

[ 6 ] - بررسی جوامع بزرگ بی‌مهرگان آبزی بر اساس شاخص‌های زیستی در رودخانه زرین گل، استان گلستان

زمینه و هدف: در سال‌های اخیر احداث مزارع پرورش ماهیان سرد آبی در کنار رودخانه‌ها افزایش یافته و تخلیه پساب این مزارع بدون هیچ تصفیه‌ایی به زیستگاه‌های طبیعی می تواند آثار سو و مخربی به دنبال داشته باشد. از جمله مهم‌ترین جوامع حیاتی رودخانه‌ها، بزرگ بی‌مهرگان می‌باشند که قادرند به عنوان یک شاخص زیستی تغییرات کیفیت آب را نشان دهند. هدف از این مطالعه بررسی تأثیر پساب تصفیه نشده مزارع پرورش ماهی بر...

[ 7 ] - Investigating the applicability of conventional vegetation indices for vegetation change detection in different environmental conditions

Vegetation indices have been developed to characterize and extract the Earth's vegetation cover from space using satellite images. For detection of vegetation changes, usually temporal images are independently analyzed or vegetation index differencing is implemented. A review on previous studies reveal that, in spite of developing several vegetation indices, to extract vegetation cover or veget...

[ 8 ] - Ecological Assessment of Organic Pollution in the Gorgan Bay, Using Palmer Algal Index

The problem of pollution in the Caspian sea has attracted increasing scientific concerns in recent years, but still, there is limited data relevant to the Gorgan bay. The current study aimed to evaluate the organic pollution of the Gorgan Bay, using Palmer Algal Index. Sampling was conducted seasonally in triplicate from summer 2017 to spring 2018. Phytoplankton samples were collected from surf...

[ 9 ] - River health assessment using macroinvertebrates and water quality parameters: A case of the Shanbeh-Bazar River, Anzali Wetland, Iran

The study of benthic macroinvertebrate communities is one of the most common methods for assessing the effects of stresses on the biological conditions of aquatic ecosystems and water quality monitoring. This research was conducted to study the changes in the macroinvertebrate communities in the Shanbeh-Bazar River, Anzali International wetland and the effects of environmental factors. Sampling...

[ 10 ] - Fitting of two benthic fishes abundance Paracobitis hircanica and Neogobius fluviatilis Using Fuzzy Regression

Knowledge of biological requirements of aquatic organisms in perennial rivers is necessary for protection of biological diversity in riverine ecosystems. Habitat knowledge includes using models for estimating specific properties from physical structure of rivers by simple and accurate methods. Fuzzy regression model was investigated for two common endemic and benthic fishes, Paracobitis hircani...

[ 11 ] - Comparative study of growth patterns Alburnoides namaki Bogutskaya and Coad, 2009 in the Salt Lake Basin

To study the growth patterns of Alburnoides namaki in the salt lake, For this purpose a total of 325 specimens were sampled using by By hand trawl net with two centimeters mesh (20 mm distance from node to node) in winter of 2018. Male to female sex ratio in the population studied showed There was no significant difference between males and females in studied areas (X2 Gloushjerd=0.074, X2 Yunj...

[ 12 ] - Study of O. kurdistanicus Kamangar, Prokofiev, Ghaderi & Nalbant, 2014 growth pattern in Sirvan River of Kurdistan Province- west Iran

Oxynoemacheilus kurdistanicus related to the Tigris and Euphrates basins and has been distributed in a wide range of Iran, Iraq and Turkey, There is limited information on the biology of this fish in Iranian waters. This study was carried out to evaluated growth pattern of this species with 209 fish samples that obtained from May up to October 2015 with Electroshocker devices. Sex ratio of male...

[ 13 ] - Evaluation of growth performance, digestive enzyme activity, immune and antioxidant parameters of Common carp (Cyprinus carpio L.) juveniles reared in aquaponic system

Aquaponic is considered a sustainable semi-closed system for food production that combines aquaculture and hydroponics. The aims of this study were to evaluate the influence of aquaponic on the growth and feed performance, digestive enzyme activity and blood parameters of Common carp juveniles for 60 days. This experiment consisted of three groups (three replications per group) which included; ...

[ 14 ] - Investigation of Factors Effective in Illegal Fishing, the South Eastern Part of the Caspian Sea, Golestan Province

The bony fishes of the Caspian Sea are the species whose reserves are decreasing due to Pollution, habitat destruction, exploitation and illegal fishing. Regarding the extent of illegal fishing in Golestan province and lack of sufficient studies in this regard, this study examines the changes in illegal fishing and identifies the factors involved in its occurrence. Using descriptive-analytical ...

[ 15 ] - Hydrochemical assessment of Chehelchai river water, Golestan province for drinking and agricultural purposes

Background and Objective: Surface water is usually highly variable in chemical composition due to contact with different geological formationsand other surface and groundwater resources.  Knowledge on water quality and the impact of human activities are particularly important for sustainable management and planning of water resources. The aim of this study was to investigate the physicochemical...

[ 16 ] - Evaluation of Gorganrood river water quality based on surface water quality indicators in Gonbad Kavous

Background and Objective: Increased untreated wastewater and unsustainable development of agriculture has deteriorated water quality of rivers. The aim of this study was to determine the quality of water in Gorganrud River basin using NSFWQI IRWQISC and Liou Pollution Index and compare them with the global standards. To do this, GIS software.was used Materials and Methods: In this study, 5 sam...

[ 17 ] - Health risk assessment of Aluminum, Vanadium and Tin due to consumption of, and King soldier bream (Argyrops spinifer), Pickhandle Barracuda (Sphyraena jello) and Japanese threadfin bream (Nemipteru japonicus)

In this research accumulation of Aluminum (Al), Vanadium (V), and Tin (Sn) and their health risk assessment due to consumption three fish species include Pickhandle Barracuda (Sphyraena jello), Japanese threadfin bream (Nemipteru japonicus), and King soldier bream (Argyrops spinifer) were investigated. Fish was harvested from Jofre in Bushehr afterward preparation, heavy metals concentration of...

[ 18 ] - Ecological assessment of organic pollution of Bustan dam reservoir using Palmer and Carlson indexes

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 ...