hamidreza jamalzadeh

Protected area of Serisha-Gouji with an approximate area of 100 square kilometers is located in north of Torbat Heydarieh city of Khorasan Razavi province. Its minimum height is 1482 m above sea level and its maximum height is 2522 m. In this field study, which was conducted in the spring and summer of 2011, the area was divided into 8 stations and identified by sampling in a survey of lizards. A total of 75 samples were collected which were identified after transfer to the laboratory using valid keys and metric and meristic traits. The identified species were: Paralaudakia caucasia, Paralaudakia microlepis, Paralaudakia erythrogastra, Trapelus agilis and Trapelus megalonyx from the Agamidae family; Cyrtopodion scabrum from the Gekkonidae family; Eremias persica; Eremias fasciata; Mesalina watsonana from the Lacertidae family; and Eumeces schneiderii princeps From the family of Scincidae. The most frequent species is Laudakia caucasia.

Silver nanoparticles (Ag-NPs) are potentially toxicant substances whose widespread use has raised considerations regarding environmental risks caused by the discharge of those nanoparticles (NPs) into aquatic ecosystems. The aim of this study was to analyze the impact of Ag-NPs on the hematologic parameters Rainbow trout, Oncorhynchus mykiss juvenile. Hematological toxicities of Ag-NPs to rainbow trout juveniles were assessed in four treatment groups: Control (without Ag-NPs), 0.1gr/L Ag-NPs solution (T1), 0.25gr/l Ag-NPs (T2) and 0.5gr/l Ag-NPs (T3). Blood samples were collected from fish after 5 and 10 days of exposure. Analysis of blood parameters in the 5th and 10th days of the experiment showed that the values white blood cells (WBCs) were higher in all treatments than those in the control group (P

Colour pattern polymorphism is more hereditary and subject to selection. Most of anuran species showed significantly colour or dorsal pattern polymorphisms, thus provide a very good system in which to survey questions pertaining to the evolution and maintenance of polymorphisms. 25 species of anuran amphibians presented that they have been seen in color polymorphism and Rana (Pelophylax) genus have the most variety. In most anurans, polymorphism is caused by the presence or absence of spots on the back of their bodies. Color variations can include skin of the whole body or part of It,s. In this research for the survey of polymorphism marsh frog Pelophylax ridibundus, dring six month of field work in the sampling areas (since March 2013 to August 2013), 200 specimens were collected from six stations (Astaneashrafiye, Siyahkal, Lahijan, Langerood, Roodsar and Amlash) in east of Guilan province. Sampling carried out using the handle tour. Samples were transferred alive to the zoology lab of Tonekabon Branch, Islamic Azad University, Then different morphs and their characteristics were recorded, based on the number and location of spots, presence or absence of the mid dorsal stripe and the amount of green in the back, out of 25 morph were identified, That it variety could be due to ecological factors, to escape from the hunter or the prey or due to genetic factors.

Amphibian requires the native studies in terms of biodiversity in Iran. There are 5 families, 8 genus, 15 species of Anura and 2 families, 4 genus, 7 species of Caudata in Iran. The purpose of present study was collecting and identifying the amphibian east of Guilan province in Iran. During six month of field work in the sampling areas from February until August 2014, with considerable walking during day and night,186 specimens were collected from different habitats of this region (6 stations: Astane ashrafiye, Siyahkal, Lahijan, Langerood, Roodsar and Amlash). Sampling carried out using the handle tour. Samples were transfered alive to the zoology lab of Tonekabon Branch, Islamic Azad University, Then identified and were fixed after morphological discription and coloration, biometric charactristics studies. Investigation was carried out on the physical characteristics by using the identification keys in reference book the Amphibian of Iran. During of present research specimens were captured belonging to 8 species, 8 genus and 6 families, including: family Ranidae (species Pelophylax sp. and species Rana pseudodalmatina), family Hylidae (species Hyla orientalis), family Bufonidae (species Bufotes (Pseudepidalea) variabilis, species Bufo eichwaldi, family Pelobatidae, species Pelobates syriacus, family Salamandridae (species Triturus karelini and family Hynobiidae, species Iranodon persicus).

Alosa braschnikowii, is abundant Clupeidae fishes in the southern Caspian Sea basin. This study was conducted to compare the morphometric and meristic characteristics of six populations of Alosa braschnikowii in the southern Caspian Sea basin including Miankale, Sari, Tonekabon, anzali, Rezvanshahr and Astara. In total 181 fish from the aforementioned stations (specimens were caught by beach seine in November 2012 from each station) were studied and compared for 33 morphometric and 10 meristic characteristics were examined. The extracted data were analyzed after data standardization using Principal Components Analysis (PCA) and Discriminate Function Analysis (DFA). Univariate analysis of variance and Kruskal-Wallis test among six populations revealed that 32 morphometric characters out of 33 and 4 meristic characters out of 10 characters studied were found to be significant (P≤0.05). DFA revealed that these six populations were distinct from each other in morphometric characters. PCA showed that these six populations are distinct from each other in 6 morphometric characteristics. These differences seem to be under the influence of geographical variation and feed conditions of the fish populations.