alireza mirzajani - Academia.edu (original) (raw)

Papers by alireza mirzajani

Iranian Journal of Applied Ecology, Sep 1, 2017

Iranian Journal of Fisheries Sciences, Apr 10, 2011

A biological study was conducted to find out about reproduction and feeding of G. lacustris in Ne... more A biological study was conducted to find out about reproduction and feeding of G. lacustris in Neur Lake from northwest mountains of Iran. Plankton diversity, hydro-chemical factors and substrate characteristic were recorded monthly. Findings showed that reproduction period of this species was short and limited to May and the mean brood size was 10.2 ± 5.3 eggs per female. The hydro-chemical analysis showed the eutrophic characteristic of Neur Lake in which the average of total organic matter was 3.7 ± 3.0 percent. The phyla representative Bacillariophyta, Chlorophyta and Cyanophyta were observed throughout the study and Chlorophyta was the dominant group. Three zooplankton phyla Rotatoria, Ciliophora and Copepoda were abundant respectively. Study on diet using gut content resulted in identification of 15 plankton genera with some resemblance to planktons of the lake.

Fish & Shellfish Immunology, Apr 1, 2017

Dietary administration of Pontogammarus maeoticus extract affects immune responses, stress resist... more Dietary administration of Pontogammarus maeoticus extract affects immune responses, stress resistance, feed intake and growth performance of Caspian roach (Rutilus caspicus) fingerlings Running head: Pontogammarus extract and roach immune response

Iranian Journal of Fisheries Sciences, Jul 10, 2016

The bioaccumulations of metals Cu, Cd, Ni, Cr, Co, Mn, Zn and Fe were measured in bivalves, Ceras... more The bioaccumulations of metals Cu, Cd, Ni, Cr, Co, Mn, Zn and Fe were measured in bivalves, Cerastoderma glucaum, and four species of fishes including Alburnus chalcoides, Liza aurata, Rutilus frisii and Sander lucioperca from various trophic levels of the Caspian food web. The concentrations of Cd, Cr, Co and Ni in most samples of fish were below the detection limits; while the concentrations were detected in most samples of bivalve C. glucaum. The stable nitrogen isotope ratios varied among the samples from C. glucaum (δ 15 N=3.5 ‰) to S. lucioperca (δ 15 N=13.1‰). Among the four fish species, while the highest concentrations of Mn, Ni and Fe were observed in L. aurata, the lowest concentrations of Mn and Fe were observed in S. lucioperca. These species also had the lowest and highest trophic levels with an average of 3.3 and 4.2, respectively. No accumulation of metals with increase in body size was observed in muscles of species from different trophic levels. The comparison of metal concentrations with the health guidelines for human consumption showed that those intakes were lower than the legislated limits. While there was a strong relationship between trophic levels and body size of A. chalcoides and R. frisii, no significant slopes were observed between the total lengths (TLs) and the Ln concentrations of metals. It is necessary to determine metal concentrations in food resources of fish species, particularly in R. frisii that has significantly different δ 15 N in relation to body size.

Journal of Environmental Studies and Sciences, Jan 21, 2010

Invasions of freshwater habitats by marine and brackish species have become more frequent in rece... more Invasions of freshwater habitats by marine and brackish species have become more frequent in recent years with many of those species originating from the Ponto-Caspian region. Populations of Ponto-Caspian species have successfully established in the North and Baltic Seas and their adjoining rivers, as well as in the Great Lakes-St. Lawrence River region. To determine if Ponto-Caspian taxa more readily acclimatize to and colonize diverse salinity habitats than taxa from other regions, we conducted laboratory experiments on 22 populations of eight gammarid species native to the Ponto-Caspian, Northern European and Great Lakes-St. Lawrence River regions. In addition, we conducted a literature search to survey salinity ranges of these species worldwide. Finally, to explore evolutionary relationships among examined species and their populations, we sequenced the mitochondrial cytochrome c oxidase subunit I gene (COI) from individuals used for our experiments. Our study revealed that all tested populations tolerate wide ranges of salinity, however, different patterns arose among species from different regions. Ponto-Caspian taxa showed lower mortality in fresh water, while Northern European taxa showed lower mortality in fully marine conditions. Genetic analyses showed evolutionary divergence among species from different regions. Due to the geological history of the two regions, as well as high tolerance of Ponto-Caspian species to fresh water whereas Northern European species are more tolerant of fully marine conditions, we suggest that species originating from the Ponto-Caspian and Northern European regions may be adapted to freshwater and marine environments, respectively. Consequently, the perception that Ponto-Caspian species are more successful colonizers might be biased by the fact that areas with highest introduction frequency of NIS (i.e., shipping ports) are environmentally variable habitats which often include freshwater conditions that cannot be tolerated by euryhaline taxa of marine origin.

Fish & Shellfish Immunology, 2017

Iranian Journal of Fisheries Sciences, 1999

Caspian seal (Phoca caspica Gmelin 1788) is the only known mammal confined to caspian sea , the l... more Caspian seal (Phoca caspica Gmelin 1788) is the only known mammal confined to caspian sea , the largest lake in the world. Taxonomically ,this seal could perhaps be considered as a population of ringed seal. Most of the seals migrate to centeral and southern Caspian sea after molting for feeding from May to September. However the diet of caspian seals varies seasonally and take a variety of fishes and small crustaceans ( Jefferson et al 1993), but in this time they feed in aera rich in common caspian kilka (Clupeonella sp.) caspian silverside (Atherina mochon), caspian gobies (Gobidae) and sculpin, beach fleas and other species crustaceans , mollusks (Krylov 1990 , Ognev 1962 ). From late Januray to end of April , Seals congregates on the ice of the centeral caspian sea for breeding (delivery, nursing, mating )and molting also a breeding behaviour was reported in the southern part on the Ogurchinsky and Mikhailov islands ( Krylov 1990 ). Gestation lasts from 10 to 11 months and only...

The coastal areas are highly productive system that is degrading due to receiving huge amount of ... more The coastal areas are highly productive system that is degrading due to receiving huge amount of various pollutants. Despite of the important of north Caspian Sea estuaries the quality index of benthic fauna received less attention. In this survey the benthic population of 18 rivers estuaries in southern Caspian Sea were investigated. The benthic sampling and identification were conducted at eight points in each estuary in three periods of winter, spring and summer 2009. The Shannon Wiener diversity and the Hilsenhoff biotic indices were used for evaluation of environmental quality. The result of Shannon Wiener index values in various rivers indicates that Astara and Lemir had the lowest and highest diversity respectively. The station 1 and 2 in river showed the lowest and offshore stations 5, 6 and 7 the highest diversity values. According to Hilsenhoff biotic index for water quality classification, the stations of 1 and 2 with low quality were significantly difference with other s...

Marine Biology Research, 2011

Page 1. ORIGINAL ARTICLE Sexual and natural selection on morphological traits in a marine amphipo... more Page 1. ORIGINAL ARTICLE Sexual and natural selection on morphological traits in a marine amphipod, Pontogammarus maeoticus (Sowinsky, 1894) NAHID NAHAVANDI1*, MARTIN PLATH2, RALPH TIEDEMANN1 & ALI R. MIRZAJANI3 ...

Journal of …, 2008

logo IndexCopernicus, Current language: English. ...

Environmental Chemistry Letters, 2021

The vast amount of plastic waste emitted into the environment is of increasing concern because th... more The vast amount of plastic waste emitted into the environment is of increasing concern because there is mounting evidence for various toxic effects of microplastics on living organisms. In particular, despite freshwater ecosystems are essential sources of water supply, they have been less investigated than marine ecosystems for microplastic pollution. Here, we review 150 freshwater studies for techniques used to separating microplastics from water and sediments. We compare major chemicals utilized in digestion and density separation steps. Sodium chloride is the most prevalent salt used in separating microplastics from freshwater environments. Hydrogen peroxide and Fenton’s reagent are most frequently used in digestion of organic materials.

Journal of Plant Research #R##N#(Iranian Journal of Biology), Dec 21, 2020