جستجوی مقالات مرتبط با کلیدواژه "boushehr" در نشریات گروه "زیست شناسی"

The concentrations of heavy metals (Cd¡ Co¡ Pb¡ Cu and Ni) in sediments¡ muscles and liver of flounder Psettodes erumei from Bushehr province during summer of 1391 were studied. Sediment samples were collected from 4 stations (Dylam¡ Genaveh¡ Dayir and Bushehr). Muscle and liver of 80 fish were dissected. Nitric acid method was used for tissues digestion and nitric-perchloric acid method was applied for sediment digestion. Atomic absorption spectrometer used in order to determine the metals concentrations. Mean concentrations of Ni¡ Cu¡ Co¡ Pb and Cd in the liver were¡ 1.75±0.06¡ 4.87±1.04¡ 0.65±0.14¡ 1.71±0.41 and 0.26±0.45 respectively¡ in the muscles were 2.7±0.71¡ 1.2±0.31¡ 4.28±0.91¡ 1.32±0.32 and 1.6±0.45 respectively¡ and in the sediments were 43.5±12.01¡ 16.2±7.01¡ 15.4±4.43¡ 3.2±0.61 and 0.34±0.25¡ respectively . Differences in heavy metals concentrations among the species is likely to have resulted from metal bioavailability¡ hydrodynamics of the environment¡ changes in tissue composition¡ stations of collection and sources of pollution within the Persian Gulf.

In the present study, age and growth of (Capoeta damascina) in Daleki-Hele River in Boshehr province, the south part of Iran was studied. Five age classes, ranged from 0+ to 4+ years, were determined for males and females. The most frequent size classes belong to 11-13 cm and 15-17 cm for males and females, respectively. The length ranged from 72 to 224 mm and total weight ranged from 4.9 to 226 gr. Also, the condition factor ranged from 0.68 to 1.36. The females were dominant over males (1:1.55). Significant relationships were found between total length with weight for females (lnY=2.895 lnX-10.895, R2=0.965) and males (lnY=2.836 lnX-10.895, R2=0.959). The possible reasons for different age and growth condition of Capoeta damascina with other studied areas are discussed.

The polycyclic aromatic hydrocarbons (PAHs) are pollutants of concern due to their persistent in the marine ecosystem, and their cause long-term adverse effect to the marine life. In this study, of concentrations of 14 PAHs and their sources in the rocky shore oysters (Saccostera cucullata) and in the sediments of boushehr province were determined. The rocky shore oyster was selected due to its wide distribution and its role in the diet of Boushehr coastal area. The sampling and analysis were perfprmed in july 2009. Samples were collected from four rockyshore stations, Genaveh, Boushehr, Dayer and Nyband Gulf. Collected samples were immediately transferred to hexane rinsed glass jars with aluminum foil inserts and transported in dry ice to the laboratory of PGRSC and kept frozen at -20°C prior to analysis. An aliquot of the samples were taken for dry weight determination. The tissue was dried with anhydrous sodium sulphate and soxhlet, then extracted for about 8 hours using dichloromethane: hexan (1:1v/v). The extract was then charged to 1st step and 2nd step column chromatography to fractionate hydrocarbons.The sediment samples were extracted with the same method, except using dichloromethane for soxhlet extractor. The fractions were analyzed by gas-chromatography/mass spectrometry (GCMS). The recovery of PAHs were more than %65. The total concentration of PAHs in oysters ranged from 146.9 to 268.1 ng/g Dry weight, while sediment concentration ranged from 41to 227.6 ng/g dry weight. Boushehr rockyshore oyster that did not present very high levels of contamination expressed low PAHs ratio. Total lipid in station 2 was higher than others. The significant correlation was observed between total lipid and total PAHs p ≤ 0.05. Both pyrolitic and petrogenic PAH are present in all oyster and sediment samples.