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Showing 5 results for Mazandaran Province
A. Sepahdari , A. Saeedi , Sh. Kakoulaki , F. Habibi Kotanaee , A.r. Babaalian ,
Volume 22, Issue 3 (10-2013)
Abstract
Streptococcusis is the one of the most important bacterial fish diseases with outbreak in
rainbow trout farms in Iran. The fish farmers have been largely suffered from huge economic
losses due to the Streptococcusis outbreaks in different rainbow trout farms in Iran. The present
study assessed the effects of some environmental risk factors on incidence of streptococcusis in
rainbow trout farms in Haraz River in Mazandaran Province, Iran. A suit of environmental
factors including water temperature, nitrite, nitrate, ammonium, water turbidity, DO, water Debi
and total count of bacteria were explored as influential factors. Fish and water samples were
randomly collected from 10 farm on a monthly basis throughout a year. Isolation and
recognition of strep strains were made using biochemical and PCR tests and the data were
analyzed by logistic regression method. According to the results, 20% of the differences were
explained by the logistic model. Management of these factors might decline the rate of disease
outbreak.
A. Sepahdari, A. S. Saeedi, S. Kakoulaki, F. Habibi Kotanaee, A. R. Babaalian,
Volume 22, Issue 4 (1-2014)
Abstract
One of the most important bacterial fish diseases which have caused some outbreaks in
rainbow trout farms in Iran is streptococcusis .The farmers have been suffering from huge
economical losses due to the disease outbreak in different rainbow trout farms in Iran. The
aim of present study was to determine the rate of streptococcusis incidence in different growth
stage in the farmed rainbow trout in Haraz River in Mazandaran Province, Iran. Fish
specimens along with water samples were collected from 10 haphazardly selected fish farms
on a monthly basis throughout a year. After clinical observations, isolation and recognition of
strep strains were undertaken using biochemical and PCR tests. The results showed that 4.6%
of juvenile fish showed clinical sings of streptococcusis while only 0.7% had strep.
contamination. These rates in adult specimens were 8.9 and 1 percent, respectively. The main
isolated bacterial strain was Streptococcus uberis
M. Hafezieh, M.v. Farabi,
Volume 27, Issue 5 (1-2019)
Abstract
Mariculture of trout fish in cage, which is a new approach of Iranian fisheries organization was followed by the last decade draining years and estimation limitation of fresh water fish production in Iran, harvested more than 2700 MT. of trout fish which is the successful choice of cage cultured fish species in three northern provinces - Caspian Sea. Final costs of fish production affected by different financial parameters such as fixed and current investments, in cage condition determined using industrial cost accounting or final production cost. In order to obtain final costs of each kg trout fish cultured in cages of Mazandaran coastal water, questionnaire from 5 trout fish cages were gathered during 2016 in that province. All data and costs are based on a cage with 15 MT capacities. Overall, initial fish biomass for releasing to the cage with the highest costs(41%) of total costs, followed by feed 37%, maintenance and 5 years amortization fixed investment (10%), Insurance(5%) and labor costs(0.018%) are the main factors final costs of the cage fish production. In this study this final production cost of one Kg fish cultured in cages system of Mazandaran province was calculated 129764 , which is 10 % lower than the price of fish cultured in raceway system(142740 Rials).
Zahra Yaghoubzadeh, Reza Safari,
Volume 31, Issue 2 (7-2022)
Abstract
Nesarud and Kheyrud rivers are important rivers in Mazandaran province that are important in terms of having special populations of fish, spawning of migratory species and feeding of estuarine fish. The aim of this study was to evaluate the microbial quality of water in Nesarud (shilling) and Kheyroud (natural reproduction) rivers from April to August 2018 and microbial factors including total bacteria, total coliform, fecal coliform and fecal streptococcus were evaluated. For this purpose, 4 stations along the route of Nesarud and Kheyrud rivers were selected and monthly for sampling of river water was performed for 4 months (April, May, July and August). Based on the obtained results, the maximum changes in the average total bacterial count of Nesarud (20250 CFU/ml) and Kheyrud (21250 CFU/ml) were achieved in May and the maximum changes in the average total coliform of Nesarud (45 CFU/ml) per month. May and Kheyrud (50 CFU/ml) were reported in April and the range of mean changes in fecal coliforms in different months in Nesarud rivers (10 CFU/ml) in May and Kheyrud (8.5 CFU/ml) per month April was variable. According to studies, the water quality of the Nesarud and Kheyrud rivers is suitable for shill formation and natural reproduction in terms of bacterial indices and the number of bacteria was in the standard range.
Hassan Nasrollahzadeh Saravi, Mahmoud Hafezieh, Arzhang Javadi, Reza Safari, Maryam Ghiasi, Asieh Makhlough, Mahdieh Baloei, Ali Nekuiefard, Mohamd Meysam Salahi, Ayob Davodi,
Volume 32, Issue 2 (7-2023)
Abstract
The aim of the study was to determine the quality of the inlet and outlet water of five selected rainbow trout breeding farms in Mazandaran Province (Haraz, Chalous, Tonekabon, and Sari) based on environmental parameters during four seasons in 2021-2022. Forty samples were collected and measured based on standard methods. According to the results, the range of water temperature (3.0-24.0°C), air temperature (2.0-25.0°C), DO (6.16-12.24 mg/l), BOD5 (0.24-2.76 mg/l), COD (2.40-93.70 mg/l), EC (284-783 µs/cm), turbidity (1.12-220-0 NTU), TSS (2-288 mg/l), pH (7.44-8.62), total phosphorus (0.2-2.12 mg/l), phosphate (0.01-0.206 mg/l), ammonium (0.012-0.538 mg/l), ammonia (0.001-0.018 mg/l), nitrite (0.001-0.426 mg/l), nitrate (0.52-6.10 mg/l), fecal coliform count (6-1000 CFU/100ml) and water quality index (WQIIR) (62.0-91.0) were registered. The water quality of this river was placed in class III (low pollution) based on the average parameters of organic pollution (BOD5 and COD) and human activities were not one of the main factors in the increase of organic matter in the river. The concentration of ammonium and nitrite was within the threshold limit, but the concentration of phosphate in all the inlet and outlet stations and in different seasons was more than the maximum limit of unpolluted rivers. The results showed that the WQIIR was in the range of 62-91. 7.5% of the total data and the mean of this index indicated the relatively good quality of the inlet and outlet water of the rainbow trout breeding farms. The highest quality of water, i.e. very good quality, is recorded in 12.5% of all data, which is observed at the inlet water of rainbow trout breeding farms. The outlet quality index of the farms was lower than its inlet, but it was categorized as good quality. The overall WQIIR (77.4±6.6) in all inlet and outlet stations indicates that the water of this farm is suitable for fish and wildlife and also suitable for rainbow trout breeding.
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