sea shores of gilan province is one off the biggest tourist attractions in iran. this area have valuable forests and grasslands. in addition it provides significant amount of corps like rice, tea, olive. considering this facts, environmental protection of this area must be priority for national government. however waste management instruction have been ratified in iran, there isn’t any specific...

The Caspian frisian roach (Rutilus frisii kutum), economically a very important fish species in Iran, is propagated in fishponds, reared into the rivers in fingerling size and then harvested from the Caspian Sea in adult stage. We found six monogenean parasites on the Caspian frisian roach including five Dactylogyrus spp. on fingerlings cultured in fishponds and rivers and two Dactylogyrus spp....

the southern shores of caspian sea is subjected to several atmospheric factors due to its geographical position. north atlantic oscillation(nao) one of the effective phenomenon's affects the most part of hemisphere included caspian sea. in this research negative and positive phases of nao considered with variability of temperature and precipitation of southern shores of caspian sea in a 30...

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 ei...

سابقه و هدف: گیاه­ پالایی مقرون­ به­ صرفه سازگار با محیط زیست است که در آن گیاه از توانایی‌‌های طبیعی خود برای بازیابی استفاده ‌‌می‌‌‌کند. گیاهان مورد باید توانایی انباشت مقادیر زیادی آلاینده‌‌های فلزی را بدون ایجاد سمیت آنها داشته باشند. امروزه افزایش جمعیت جهان به دنبال توسعه صنایع کارخانه‌‌ها، بر میزان پساب‌‌های وارده غالبا حاوی فلزات سنگین مختلف ‌‌می‌‌‌باشند، افزوده ‌‌می‌‌‌شود. تاثیرات مخرب...

there are a number of ideas to generate cloud and precipitation in the southern coasts of caspian sea, but none of them explain the cause of precipitation particularly heavy and super heavy precipitations precisely. this study describes main thermodynamic factors when the situation and location of synoptic patterns are effective. on the basis of daily data, monthly regimes and monthly trends of...

thirteen environmental elements were distinguished in the livers of various species of fish thathave been sampled from 15 sites in a restricted area of the khorramabad river basin in lorestan province(west of iran). sites sampled represented agricultural, mining, mixed, and urban/recreation land uses andbackground conditions. lithium and silver were not detected at any of the sites. the minimum...

More than 10,000 Caspian seals (Phoca caspica) were reported dead in the Caspian Sea during spring and summer 2000. We performed necropsies and extensive laboratory analyses on 18 seals, as well as examination of the pattern of strandings and variation in weather in recent years, to identify the cause of mortality and potential contributory factors. The monthly stranding rate in 2000 was up to ...

to determine the prevalence of animal fascioliasis in coastal regions of the caspian sea, during 2006-2007, a total of 2368 faecal samples were collected from sheep (n=1250), cattle (n=975) and horse (n=143). the samples were obtained directly from the rectum of animals. floatation method was performed for determination of egg per gram of faeces (epg). our findings revealed the presence of fasc...