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Showing 2 results for Physicochemical Parameters
Seyed Ahmadreza Hashemi, Mastooreh Doustdar, Ashkan Azhdari, Elnaz Erfani Far, Paria Akbari, Ghasem Qaramirshamlo,
Volume 32, Issue 2 (7-2023)
Abstract
In this study, the relationship between water physicochemical parameters (sampling of water and soil) and Babylon snail biomass was done by sampling from four fishing grounds of this species in the north of the Oman Sea including Pasabandar, Breis, Pozm, and Konarak from September 2021 to September 2022 by circular cages. The average values of different physicochemical parameters (pH, salinity, turbidity, TOM, dissolved oxygen, and sand and silt) and different nutrients (nitrate, phosphate, ammonia, and nitrite) in the before and after seasons (monsoon) did not show a significant difference (p>0.05) through one-way variance analysis (between several periods) comparison of averages. Temperature and silt parameters from different seasons (before and after monsoon) had significant differences (p<0.05). Multi-layer artificial neural network was used for the correlation among the snail biomass, physicochemical parameters, and water nutrients and it showed that Temperatures and Nitrite were the most impact parameters on (snail biomass). From September to November, the highest catch rate was observed and it was the main season of Babylon snail fishing in Sistan and Baluchistan region due to the decrease in the water temperature and increase in the nitrite content. This study can be considered for fishing sustainability, basic management in exploitation, and a better understanding of the biological and demographic characteristics of this snail species.
Seyed Abdolhamid Hosseini, Abolhassan Rastiannasab, Mohammad Meysam Salahi Ardakani, Forogh Gandomkar, Esmaeel Kazemi,
Volume 32, Issue 5 (12-2023)
Abstract
Due to its unique climate, the province of Kohgiluyeh and Boyar Ahmad has a lot of potential in aquaculture. However, due to the lack of knowledge of water resources in different climates of the province, a large part of these resources, are unused, especially in tropical regions, which can be used for fish farming, including sturgeon fish. In this regard, the investigation of the khairabad river in the cities of Gachsaran were done in this project. For this purpose, the investigation of Khairabad river in Gachsaran city was investigated. after identifying the research stations, regular sampling was done to check the physicochemical characteristics of water and as well as record and analyze meteorological and climatic data. The temperature was 18-23°C, pH in the range of 7-8, hardness 453-238 mg/l, phosphorus 0.2-0.6 mg/l, nitrate and nitrite respectively were in the range of 1.2 to 1.2 and 0.01 to 0.06 mg/l. The BOD level was below 10 mg/l, which is considered as a relatively polluted river. Also, the COD and EC levels were meseaured 6-25 mg/l and 542-1433 µS/cm, respectively.
The results indicated that the most suitable area for sturgeon farming is downstream of Khairabad river, which of course requires the use of various mechanization methods to reduce the bacterial load of water, remove heavy metals, aeration and also use wells. It is a drain. Considering that in the lower reaches of the Khairabad river, the distance from the outlet of the Kausar Dam to the area of Masoum Abad village, near the border of Kohgiluyeh and Boyer Ahmad provinces with Khuzestan province (about 20 km), the maximum flow that can be used for sturgeon farming, especially bleuga, is about 1.5 m3/s (50% of the minimum discharge in the summer) and taking into account 4.5 l/s of water for the production of 1000 kg of sturgeon fish and also Keeping a distance of about 5 km for the construction of sturgeon farms in order to maximize the self-purification of the river, it is possible to issue a license to build 4 farms with a total production capacity of 1200 tons of beluga.
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