Maryam Nasrolahpourmoghadam

University of Tehran | UT · Department of Fisheries and Environmental Sciences

Salmo caspius Kessler, 1877 is one of the most commercially important species of Salmonidae in the southern basin of the Caspian Sea. The occurrence of its wild populations has undergone sever reduction during the last years. In spite of the yearly restocking activity, still no progress on the recovery of its wild population has been observed. Henc...

Morphology and feature selection are key approaches to address several issues in fisheries science and stock management, such as the hypothesis of admixture of Caspian common carp (Cyprinus carpio) and farmed carp stocks in Iran. The present study was performed to investigate the population classification of common carp in the southern Caspian basi...

Environmental DNA (eDNA) has been used to detect the presence of various species in aquatic ecosystems, but its degradation by several environmental factors can influence the correct identification of aquatic organisms. The present study examined the effects of a pesticide, diazinon, on breakage of Cyprinus carpio eDNA. The specimens were exposed t...

Genetic diversity studies are essential in characterization of populations and species conservation. Alosa braschnikowi is a commercially valuable species native to the Caspian Sea. It is thought to have eight to nine subspecies, but the genetics of these populations remains to be investigated. The present study was performed to evaluate the geneti...

Habitat suitability index (HSI) models are usually used to forecast habitat quality and species distributions and are used to develop biological studies, management priorities and anticipate possible changes under different management or climate change situations. This study was conducted to identify the habitat suitability index of three species n...

The present study aimed to investigate effects of the heavy metal Cd on the sperm morphological indices of Caspimyzon wagneri. The sperm were exposed to 0.01, 0.1, 1, 10, 100 and 1000 mg.L-1 Cd for three minutes, three and 36 hours. The sperms exposed to Cd showed an increase in the length, width and surface of the head, flagella degradation and sl...

The DNA breakage has been widely used in ecotoxicological studies to investigate effects of pesticides in fishes. The present study used a fuzzy inference system to quantify the breakage of DNA double strand in Aphanius sophiae exposed to the cypermethrin. The specimens were adapted to different temperatures and salinity for 14 days and then expose...

The pollution of aquatic ecosystems may affect natural reproduction of fish populations by decreasing the fertilization efficiency. Among the various sources of pollution, heavy metals are important group, being found in both freshwater and marine environment. The present study investigated changes of sperm characteristics of Caspimyzon wagneri whe...

This study was conducted to apply the landmark-based geometric morphometrics technique to differentiate three species of the genus Paracobitis (P. iranica, P. malapterura and P. rhadinaeus) in Iran based on their body shape, because previous works, using traditional morphometrics, could not distinct them. A total of 150 specimens were sampled from...

The toxicity of cypermethrin at 0.02 μg L-1 concentration in relation to salinity (0 and 14 ppt) and temperature (16±1 and 25 ± 1°C) was studied on the liver tissue of zebra fish (Aphanius sophiae) exposed to cypermethrin for 14 days under labratory condition. The liver tissue changed significantly with changes in salinity and temperature. The majo...

The present study aimed to investigatethe effects of different levels of temperature and salinity on the body shape of Sophiae toothed carp (Aphanius sophiae) using geometric morphometrics technique. A total of 120 specimenswere reared at four combined treatments with two levels of temperatures(16 and 25°C) and two levels of salinity (0 and 14 ppt)...

Ecotoxicological studies that use histological techniques enjoy descriptive approach in explaining the damages to tissues. In the present study, a rank-based estimation for linear models was used to examine significant difference between levels of cypermethrin on histological changes of the liver in Aphanius sophiae. The toxicity of cypermethrin as...

In the present study, the effect of salinity on the body shape was studies in the zebra fish (Aphanius sophiae) using geometric morphometry method. 30 zebrafish at two salinity levels (0 and 14 ppt) were reared for a month. Then the left side of the specimens were photographed and landmarks put on two-dimensional images using tpsDig2. Landmark data...

In the peresent study, the effect of salinity on the body shape was studies in the zebra fish (Aphanius sophiae) using geometric morphometry method. 30 zebrafish at two salinity levels (0 and 14 ppt) were reared fore a month. Then the left side of the specimens were photographed and landmarks put on two-dimensional images using tpsDig2. Landmark da...

Temperature as an environmental factor, play important role in fish life. Angel fish (Pterophyllum scalare) is one of the most popular fish species that its production has developed in the ornemental fish industery and there is little information about the effect of rearing temprature in the aquarium. Hence, this study was carried out to investigat...