Ziba Salarijoo; Alireza Riyahi Bakhtiari; Sayed Mahmood Ghasempuri
Volume 13, Issue 3 , October 2015, , Pages 63-70
Abstract
The prevention of pollution of marine ecosystems is very important for the sustainable use of resources. Given the persistence of pollutants in the aquatic food chain, the likelihood of damage to all living organisms is high, including humans who are at the top of the food chain. n-alkanes were used ...
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The prevention of pollution of marine ecosystems is very important for the sustainable use of resources. Given the persistence of pollutants in the aquatic food chain, the likelihood of damage to all living organisms is high, including humans who are at the top of the food chain. n-alkanes were used as an indicator of the origin and changes in organic substances. The present study was aimed at determining the origin and concentration of these compounds in the eggs of four sea-bird species (White-cheeked Sterna repressa, Bridled Sterna anaethetus, Greated Crested and Lesser Created T. bengalensis Terns) on Shidvar Island in July 2013. n-alkanes were mostly determined in the range of n-C14 - nC35, and their total obtained concentrations in the sampled eggs of White-cheeked, Bridled, Greated Crested and Lesser Created Terns were also in the range of 41.39-86.32, 22.88-53.19, 21.82- 54.94 and 59.47-95.46 (µg.mg-1 lipid), respectively. However, the concentrations of these compounds in eggs of the White-cheeked and Lesser Created Terns were higher than the Greater Crested and Bridled Terns. Diagnostic ratios of CPI, Pr/Ph, n-C17/Pr, nC18/Pr and U/R, in addition, n-alkanes in all the samples were mostly recognized as originating from petrogenic compounds and, so, the most important causes involved are presumably contamination from oil refineries which have been established on Lavan Island closed to Shidvar Island. The presence of oil pollutants cause by oil spills in the Persian Gulf, shipping, the discharge of ballast water from ships to this area is also an important source.
fatemeh Ahmadipour; Nader Bahramifar; Seyed Mahmood Ghasempouri
Volume 10, Issue 2 , January 2013
Morteza Davodi; Abbas Esmaili-Sari; Nader Bahramifar; Seyed Mahmoud Ghasempouri
Volume 8, Issue 1 , October 2010
Abstract
Shadegan wetland, one of the largest wetlands in Iran, is subject to different pollutants. One of these contaminants is the residue of organochlorine pesticides such as DDT and its metabolites used to combat pests. Residues of DDT and its metabolites (p,p/-DDT,o,p/-DDT,p,p/-DDE, o,p/-DDE, p,p/-DDD) were ...
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Shadegan wetland, one of the largest wetlands in Iran, is subject to different pollutants. One of these contaminants is the residue of organochlorine pesticides such as DDT and its metabolites used to combat pests. Residues of DDT and its metabolites (p,p/-DDT,o,p/-DDT,p,p/-DDE, o,p/-DDE, p,p/-DDD) were investigated in five edible fish species of Shadegan wetland, and the effect of the amount of this pesticide on the weight, age and diet was investigated. Total DDT (the sum of 5 metabolites) in Barbus grypus and Cyprino carpiowas 6.50 and 3.27 ng g-1, respectively. Results showed that p,p/-DDE had a maximum concentration in all species and p,p/-DDT in Barbus sharpeyi (0.12 ng g-1) and Cyprino carpio(0.09 ng g-1), o,p/-DDE metabolite in Barbus grypus ( 0.12 ng g-1) and Aspius vorax (0.20 ng g-1) and o,p/-DDT metabolite in Barbus barbules had a minimum concentration. These results show any new application of this pesticide in the land around the wetland. The mean concentration of DDTs was higher in weight group>320 g (6.77 ng g-1) and in age group>3 years (6.70 ng g-1) and those of an omnivorous diet (7.34 ng g-1) than in the other groups. The calculation ofestimated daily intake (EDI) of this pesticide and comparison with international standards, showed no risks for residents in this area.
Gholam Reza Banagar; Mahmoud Karami; Bahram Kiabi; Mahmoud Ghasempouri
Volume 6, Issue 2 , January 2009
Abstract
Fish diversity of Haraz River Was Studied from November 1999 To August 2000. This river is situated in The Southern Caspian basin of Iranian Mazandaran Province. Five Stations Were Selected along The River. 522 specimens were Collected and studied, that belonged to 20 species and 9 families: Petromyzontidae, ...
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Fish diversity of Haraz River Was Studied from November 1999 To August 2000. This river is situated in The Southern Caspian basin of Iranian Mazandaran Province. Five Stations Were Selected along The River. 522 specimens were Collected and studied, that belonged to 20 species and 9 families: Petromyzontidae, Cyprinidae, Cobitidae, Salmonidae, Gobiidae, Mugilidae,Balitoridae,Poeciliidae and Gasterosteidae.Cyprinids comprised 67.2 percent of the species. Seventy percent of species were resident and 30 percent anadromous. Rain bow trout (Oncorhynchus mykiss), Gold fish (Carassius auratus), (Liza saliens) and Stickle back (Gasterosteus aculeatus) and Gambusia (Gambusia holbrooki) were introduced species. Shannon- Wiener's coefficient of diversity (H'), Food selectivity and Horn's coefficient of niche overlap were estimated.
