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Open Access Article

1 - Distribution of Pearl oysters (Pinctada spp.) and estimation of abundance of Pinctada radiata in Bushehr coastal areas, Persian Gulf
N. Niamaimandi

Study on distribution of pearl oysters (Pinctada spp.) throughout the period of September 2008 – 2009 and stock assessment of Pinctada radiata in the four months (September, March, May and July) of the year were carried out in Bushehr coastal areas (from 50˚ 38&ac More

Study on distribution of pearl oysters (Pinctada spp.) throughout the period of September 2008 – 2009 and stock assessment of Pinctada radiata in the four months (September, March, May and July) of the year were carried out in Bushehr coastal areas (from 50˚ 38´ - 29˚ 27´ to 52˚ 41´ – 27˚ 17´). The objectives of this study were identifying location of pearl oysters (Pinctada spp.) and also estimation of abundance of Pinctada radiata (live shell) in Bushehr coasts.  Regular samples were obtained at some months of a year from in four areas at low tide. Some transects were selected at random direction in every area, to cover all the shell beds. In each transects one or two sampling quadrats (0.25 m2) were placed at random. Samples (empty and live bivalves) were identified and counted. Some of the samples were transferred to a bag and taken back to the institute lab for identification and further analysis. In this study the percentage of samples was used to show the distribution of the species in different areas. Faunal corelation between stations was calculated by Sorensen formula. In the studied areas, distribution of oyster shell was identified in the Golestan, Ouli, Nayband and Ganaveh. Maximum faunal corelation (49%) was found between Golestan and Ganaveh while Golestan and Nayband showed minimum faunal corelation (25%). In the shore line area of Genaveh live oyster, Pinctada radiata were sampled. The abunce estimation of this species was maximum in July (Tir) 60.5 shells per 100 m2 and minimum in March (Esfand) 3 per 100 m2. Mean abundance for this species was estimated to be 27.7 ± 24.2 shells per 100 m2. Manuscript profile

Open Access Article

2 - Identification and diversity assessment of crustacea of Mongoft Artificial Reefs in Bushehr Province , Persian Gulf
A. Vosoughi H. Hosseinzadeh Sahafi A. Rajabi

The present study aimed at identification and assessment of biodiversity of crustacea of Mongoft Artificial Reefs in BushehrProvince and was conducted in 2009. Seasonal samples were collected in spring and summer, with 3 replication in 3 stations by diving operations , More

The present study aimed at identification and assessment of biodiversity of crustacea of Mongoft Artificial Reefs in BushehrProvince and was conducted in 2009. Seasonal samples were collected in spring and summer, with 3 replication in 3 stations by diving operations , using a quadrate with dimensions of 35 × 35 cm. In total 10 species of crustacea identified were related to  two orders Decapoda and Cirripedia. Barnacles with 1508 number per m2 (52.8 %) had the highest frequency. Maximum frequency of crustacea, 768 / m2 , in spring and the minimum number of 211 was recorded in summer.             Results showed that Palaemonidae family of Decapoda with 761 n / m2 ( 26.6 % ) in the seasons and sampling stations was more abundant compared to other species. ANOVA results identified between the two seasons numbers of Custacea. ( P<0.05). In review of the biological indices, highest Shannon diversity index value was in station 1 in spring with the amount of 1.80  and lowest Shannon diversity index value in  the station 3 in summer with the amount of 0.99. Indices used to determine that spring species diversity was more than summer. Considering the values obtained for biological indices it can be concluded that the region may be exposed to stress.  Manuscript profile

Open Access Article

3 - Assessment of physical sensitivity of coastal fringe of Miankale Wetland based on Environmental Sensitivity Index (ESI)
R. Nezakati B. Behrouzirad S. Malmasi F. Esmaili

Miankale coastal area is located in southeastern part of Caspian Sea. The area, which contains GorganGulf and Miankale Wetland, is recorded as an international wetland in Ramsar Convention. It has high potential for tourism activities. Moreover, the increasing trend of More

Miankale coastal area is located in southeastern part of Caspian Sea. The area, which contains GorganGulf and Miankale Wetland, is recorded as an international wetland in Ramsar Convention. It has high potential for tourism activities. Moreover, the increasing trend of economic development, especially oil activities in adjacent countries reveals the necessity of management and conservation of these coasts. The aim of this study is management of the coastal area by applying NOAA models and Environmental Sensitivity Index (ESI). Physical sensitivity division of coasts has been done based on field surveys and using satellite images and Geographical Information System (GIS). The assessment of physical factors including wave energy, slope and bed substance in the region under study showed that the western parts of Miankale coasts are categorized in the forth class of NOAA classification and the central part of these coasts is regarded in 9B class. Gomishan, Khajeh Nafas, Chalasht and Gorgan Gulf2 are classified as 10D according to NOAA classification. The results of this study indicated that not only physical diversity, including geomorphologic characteristics and the bed substrate of these coasts, is low but also there are sensitive biological resources in the region. For these reasons, if oil pollution occurs, pollutants may remain in coastal areas for a long time. Therefore, more attention should be paid to manage the coastal areas in this region.  Manuscript profile

Open Access Article

4 - Effect of diet on special growth rate (SGR) and weight growth (WG) of Angel fish fry's (Pterophyllum scalare)
S. Abdolbaghiyan A. Matinfar Sh. Jamili

There are several factors affecting Angel fish fry's (Pterophllum scalare ) survival and quality and the type of diet as the most important factor. In this study, the effect of three different diets of food on special growth rate (SGR) and weight growth (WG) during 30 d More

There are several factors affecting Angel fish fry's (Pterophllum scalare ) survival and quality and the type of diet as the most important factor. In this study, the effect of three different diets of food on special growth rate (SGR) and weight growth (WG) during 30 days has been studied. Food treatments including dried blood worm, Artemia decapsulated cysts and dry blood worm together with Artemia decapsulated cyst. For each food diet three replications took place. For this research 9 aquaria with 60×40×30 centimeter dimension were allocated to the treatments .Temperature of the water was set in 31 degree centigrade. Other factors such as temperature, pH and oxygen were similar for all treatments. The results of this search showed that the type of food affects the Angel fish fry's SGR and WG and the maximum SGR belonged to dry blood worm food treatment resulting 0.0350 ± 0.0083. And the minimum amount belonged to Artemia decapsulated cyst resulting in 0.0189 ± 0.0075. For the weight growth (WG) the maximum belonged to dry blood worm as 194.444 ± 73.102 and the minimum belonged to Artemia decapsulated cyst which is 80.318 ± 39.596. Manuscript profile

Open Access Article

5 - Investigating relationship between silver carp Mortality and some environmental factors in fish culture ponds of Azadegan Farming Complex
S. Abdollahi M. Khodadadi R. Peyghan E. Rajabzadeh

In the present study within nine months (from January to September) water of Azadegan freshwater ponds was sampled in every 15 days intervals (2 times monthly). Samples were taken from 4 ponds in which 3 ponds had mortality history and one pond was considered as control More

In the present study within nine months (from January to September) water of Azadegan freshwater ponds was sampled in every 15 days intervals (2 times monthly). Samples were taken from 4 ponds in which 3 ponds had mortality history and one pond was considered as control. Determination of physicochemical factors such as temperature, pH, dissolved oxygen, ammonia, nitrite and total phosphorus were performed and also recognition and counting of phytoplankton was done by using slide chamber and invert microscope. In this study a total of 28 genera belonging to 4 phyla of phytoplankton such as green algae (Chlorophyta), blue-green algae (Cyanophyta) , Diatoms (Bacillariophyta) and (Euglenophyta) were recognized. Most abundant phytoplankton was belonged to Cyanophyta phylum. But Chlorophyta phylum had the most variety of the genera. The one-way ANOVA test showed that there is no significant difference between phytoplankton densities in ponds. The mean NO2 concentration in wintering ponds was 0.12±0.19 that changed significantly during the season. In culture ponds the physico-chemical factors such as oxygen, pH, temperature, ammonia, nitrite and TP had changed significantly during the study. In culture ponds, the oxygen, temperature, pH, nitrite and ammonia ranges were 6-8 mg/l, 24-31 ْC, 8.5-9.2, 0.38-0.01 mg/l, 2.25-0.2 mg/l respectively. During the present study three spicies of cyanobacteria namely, Phormidium sp. ,  Aphanizomenon sp.  and Oscillatoria sp. were  identified which some other studies showed them as potential toxic or in the case of heavy bloom of  Oscillatoria, there has been massive fish mortality in the ponds.  Manuscript profile

Open Access Article

6 - Measurement and comparison of heavy metals (Mn, Cu, Zn,Fe) in Liza abu in the Karoon and Bahmanshir Rivers in Khoozestan Province
A. Askary Sary M. Khodadadi M. Kazemian M. Velayatzadeh M. Beheshti

We assessed concentration of heavy metals Mn, Cu, Zn and Fe in the muscle, liver and gill tissues of Liza abu in Karoon and Bahmanshir Rivers in Khoozestan Province in winter 2009. Metals were extracted from the tissues using wet digestion method. Concentration of the h More

We assessed concentration of heavy metals Mn, Cu, Zn and Fe in the muscle, liver and gill tissues of Liza abu in Karoon and Bahmanshir Rivers in Khoozestan Province in winter 2009. Metals were extracted from the tissues using wet digestion method. Concentration of the heavy metals were measured by Atomic Absorption Spectrophotometer. The highest concentration of Mn, Cu, Zn and Fe was 0.706±0.013, 0.428±0.020, 11.74±0.40, 14.04±0.08 mg/Kg. and the determined lowest concentration of Mn, Cu, Zn and Fe was 0.646±0.012, 0.289±0.033, 9.74±0.26, 11.81±0.34 mg/Kg. respectively The results showed concentration of heavy metals Mn and Zn in the muscle, liver and gill of Liza abu in Karoon and Bahmanshir Rivers found no significant difference between them (P≥0.05). Cu in the muscle and liver showed a significant difference (P≤0.05), but in gill there was no significant difference (P≥0.05). Fe in the liver and gill showed no significant difference (P≥0.05) but in the muscle there was a significant difference (P≤0.05). Manuscript profile

Open Access Article

7 - Environmental Risk Assessment of Balaroud Dam of Khuzestan`s construction Using Analytical Hierarchy Process
S. A. Jozi S. M. Hosseini M. Tabib Shoshtare

This study attempts to determine and assess the Risks due Construction of Balaroud Dam.After the recognition of the activities and the environment of the field under the study with regard to the magnitude of the effects, the likelihood of the possible consequences for h More

This study attempts to determine and assess the Risks due Construction of Balaroud Dam.After the recognition of the activities and the environment of the field under the study with regard to the magnitude of the effects, the likelihood of the possible consequences for humans, the environment and the working equipments were identified and the classification of the risks based on the delfi method was conducted and the risk-creating factors were classified naturally, biophysically, and anthropogenically. The methodology used was analytical Hierarchy Process. After the creation of the hierarchy of risks; paired comparison matrices were formed with regard to the risk of danger and effect magnitude. Moreover, to obtain the relative and final weight of each of these factors, preferences amounts were given to the expert choice software. results show that cut and fills with the final weight of 0. 277 is the most import risk in the region. Also, drilling and explosion with the final weights of 0.60 and 0.111 are of second and third priority. Other factors are lower in priority. Measures to control and reduce risks are alsoprovided. Manuscript profile

Open Access Article

8 - Effect of Silymarin extract on immune system of Rainbow trout (Oncorhynchus mykiss ) challenged by diazinon
K. Ahmadi A. Matinfar A. R. Mirvaghefei B. Ataeimehr M. Banaee

To date, discharge of agriculture pesticides into surface water is one of the biggest environment problems that can threaten the aquatic life. Impact of pollutants on the fish immune system can result in sensitivity and becoming vulnerable to pathogens. Diazinon, one or More

To date, discharge of agriculture pesticides into surface water is one of the biggest environment problems that can threaten the aquatic life. Impact of pollutants on the fish immune system can result in sensitivity and becoming vulnerable to pathogens. Diazinon, one organophosphate pesticides that used in many agriculture areas of Iran, is found in surface water. The purpose of this study was to evaluate effects of diazinon on fish immune system and use of Milk thistle plant extract, Silybum mariamum, in to reducing adverse effects of this toxin on the immune system of rainbow trout. Significantly reduced plasma levels of peroxidase, IgM, total complement, lysozyme of fish that had been exposed to diazinon have well illustrated the impact of diazinon on immune system in long periods. While, no significant change was observed in the fish nourished by complementary diet and challenged by toxin compared with control fish group that indicated this protective and amplified effect of silymarin on immune system of rainbow trout. Manuscript profile

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