Lake Neur is the largest natural lake, the fresh water of Ardebil province and one of the most important tourist attractions in this province. The aim of this study was to determine the status of bacterial contamination, water of Neur Lake and the effects of some physical and chemical parameters such as pH, temperature, oxygen, nitrite, nitrate and phosphate, ammonium, COD, BOD. For this purpose, 5 selected stations were sampled twice in thespring, summer and autumn of1395.Regarding the region's climate and severe cold and freezing of the lake, there was no possibility of catching and sampling in winter. Bacterial sampling was performed according to standard 4208 (sampling for microbiological tests). Then, tests including total bacterial count, total coliform and fecal coliform and fecal streptococcal were performed.The highest density of heterotrophic bacteria was in summer (50000 cfu / ml), which was more than standard standard. Some bacteria, such as Pseudomonas and Aeromonas, are considered as pathogenic bacteria in fish. Isolated from lake water, the highest was in summer (2000 cfu / ml) at station 1, and the highest levels of total bacterial fecal coliforms were observed at station 1 and 3 (110 cfu / ml). The highest incidence of streptococci was observed in summer (3) cfu / ml 110. The highest frequency of sulfite reducing bacteria was observed at station 1 in spring at PO4mg / l, NH4mg / l and NO3mg / l in all seasons, in the standard EPA standard, COD, BOD and pH , In some seasons more than the standard EPA standard.The amount of heterotrophic bacteria, total form and total coliform and fecal streptococcal in some seasons and stations was higher than the maximum level. The increase water temperature, livestock and passage in the region, and some tourist and agricultural activities in the warm seasons and wind and water turbulence an‎d the increase in autumn sediments was due to microbial contamination in Neur Lake.This lake, due to the high parameters Not suitablefor trout fish.

درياچه نئور , باكتريهاي هتروتروف , كلي فرم , كلي فرم مدفوعي , استرپتوكوك , آلودگيهاي باكتريايي , شاخص هاي فيزيكي شيميايي آب

تهران موسسه تحقيقات علوم شيلاتي كشور

جدول، نقشه (رنگي)، نمودار (رنگي)

موسسه تحقيقات علوم شيلاتي كشور 54411

ص. ع. به انگليسي: Monireh Faeed. Study of Coliforms and Streptococcus bacterial in Neur Lake in Ardebil Province , [همكاران طرح] محمدرضا مهرابي، فخرالدين ميرهاشمي نسب، محدث قاسمي، زهره مخير، جواد دقيق روحي، صادق اميدوار، حجت خداپرست، فرشاد ماهي صفت، بابك رمضاني عاقله، اسمعيل يوسف زاد , كتابنامه: ص. 34- 36

ماهي‌ها -- بيماري‌ها , بيماري‌هاي باكتريايي در ماهي‌ها , هتروتروف , درياچه نئور

/3

ف999م

639