Showing 4 results for Anzali Wetland
Maryam Fallahi Kapourchali,
Volume 4, Issue 2 (9-2015)
Abstract
The antibiotic properties of eight cyanobacteria (blue-green algae) species from Anzali Wetland was investigated on several bacterial species through vacuum distillation and simple mechanical methods. The result showed that Anabaena sp., A. variabilis, A. flos-aquae and Aphanizomenonflos-aquaehad negative effect on the growth of Staphylococcus aureusandA. flos-aquaeand A. oscillaroideshad negative effects on the growth of E. coli. The growth of Candida albicans yeast was greatly reduced by Aphanizomenonflos-aquae, A. variabilis, and A. oscillaroides. Among the investigated algae only A. oscillaroides could reduce the growth of Pseudomonassp.
Amirali Moradinasab, Hojjat Ahmadi Fackjour, Ehsan Kamrani, Masoud Sattari, Ali Ghasemi, Mahmoud Tavakoli, Sarah Haghparast,
Volume 6, Issue 1 (6-2017)
Abstract
Growth, sex ratio and age of 188 specimens of Tench, Tinca tinca, from Anzali wetland were recorded during Nov. 2013 to June 2014. The age range of fish was 0+ to 6+ years. Male to female sex ratio was 1:1.7 that differed significantly (P<0.05). Maximum total length (TL) and weight (W) was 40.7 cm and 1000g, respectively. The b value of the length-weight relationship was 2.70 that showed negative allometric growth (p<0.05). The growth performance index (ϕ) was calculated as 2.61. The estimated von Bertalanffy growth parameters were (L∞= 47.48 cm, k= 0.18 yr- and t0= -1.07 yr). Tmaxwas calculated 16.41 years. Also infinity weight (W∞) was estimated as 1261.43 g. The present investigation provides basic information about population structure of Tench (T. tinca) in Anzali wetland.
Volume 7, Issue 4 (9-2019)
Abstract
Aims: Monitoring and zoning of water resources are one of the important principles in environmental planning and management. Therefore, considering the issues raised and the importance of Anzali wetland monitoring, the assessment of effective factors in zoning (GIS) along with TSI p, TSI n, and NSFWQI indices and the study of land use effects justifies the necessity of this study.
Materials & Methods: In this study, physicochemical parameters of water (phosphate, total nitrogen and total dissolved solids, dissolved oxygen, acidity, electrical conductivity, and BOD5 properties) and water quality indicators (TSI p, TSI n, and NSFWQI) were modeled using GIS interpolation functions. To determine the effect of land use, the partial and Pearson correlations coefficient were used.
Findings: According to zonation maps of annual mean values of qualitative parameters, the lowest dissolved oxygen content was in the eastern part of the wetland, the highest electrical conductivity, as well as BOD5 observed in the center of the north, in the east and north of the wetland, respectively. A survey of the total phosphate zonation map revealed the increasing trend from west to east of the wetland. The partial correlation analysis showed that the electrical conductivity, acidity and total dissolved solids were directly affected by inputs and effluent from the land use (p<0.05; p<0.01).
Conclusion: Based on the coefficient of determination, about 70% of the pollution derived from the use of wetlands surrounding and entering wastewater from agricultural fields, industrial and urban.
Volume 13, Issue 54 (8-2015)
Abstract
Crucian carp (Carassiu sauratus) is one of the economic species of Anzali wetland. In recent years, the demand of high consumption was found, because of its low price and high level of catch. This study focused on accumulation of heavy metals(Cd, Pb and Zn) in the edible tissues of Crucian.Sampling were done in 3 stations (West,Center and East) of Anzali wetland in 1391. In this study 10samples were collected from each site in the standard weight by grill net, randomly. After separation of tissues, preparing of samples were conducted by using of wet digestion method and mixed acid ( HNO3/HCLO4).After filtration, the prepared samples were determined for Cd, Pb and Zn by using a flam atomic absorption spectophotmeter (AA),SHIMADZU model 680.The levels of metals were compared with the standard of American Food and Drug Administration (FDA) and the world Health Organization (WHO). The average concentrations of cadmium in the soft tissue of crucian were 0.07 , 0.05 and 0.05 μ g / g dry base for West, East and Center of Wetland. For Zinc, average concentrations for West,Center and East were 58.45, 46.4 and 49.7 μ g / g dw, respectively. The result showed that,there were not significant differences (P>0.05) between stations about the Cadmium, Lead and Zinc in the tissues of Crucian. Concentrations of Pb and Zn were higher than of standars levels of WHO and FDA.
