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List of Articles
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Open Access Article
1 - A review on ammonia toxicity in fish
Alireza JahanbaniAbstractAmmonia toxicity is one of the most common types of poisoning in fish, which sometimes manifests itself in acute and sometimes chronic forms. Ammonia enters the water from various sources such as industrial wastes, agricultural runoff, and decomposition of micro MoreAbstractAmmonia toxicity is one of the most common types of poisoning in fish, which sometimes manifests itself in acute and sometimes chronic forms. Ammonia enters the water from various sources such as industrial wastes, agricultural runoff, and decomposition of microorganisms living in water and as the final excreta resulting from the catabolism of proteins and amino acids in aquatic animals. Ammonia poisoning is associated with a wide range of symptoms due to the concentration of this substance. These symptoms can range from simple behavioral changes to severe neurological symptoms and death. Fish adopt different strategies when this poisoning occurs; these include reducing nutrition, reducing protein metabolism, detoxifying ammonia and turning it into less toxic substances. Almost all fish organs respond to ammonia poisoning, but organs such as the liver, gills, muscles, and brain play a more prominent role in the development of symptoms, condition control, and detoxification. Understanding the biochemical mechanisms of these organs in the face of ammonia toxicity and understanding the pathophysiology of this toxicity can help prevent or manage this poisoning if it occurs. Of course, not all fish species respond the same way to ammonia toxicity, and some species that are more resistant may be better breeding options. Manuscript profile -
Open Access Article
2 - Genetic variability and differentiation of golden mullet (Liza aurata) in seashore of Mazandaran province using microsatellite molecular
Mohammad BehroozAbstractGenetic structure of golden mullet, Liza aurata, was investigated in the Ramsar and Fereidunkenar shores using 6 microsatellite markers designed for gray mullet (Mugil cephalus) and hand mullet (Mugil soiuy). Totally, 60 samples of adult golden mullet were colle MoreAbstractGenetic structure of golden mullet, Liza aurata, was investigated in the Ramsar and Fereidunkenar shores using 6 microsatellite markers designed for gray mullet (Mugil cephalus) and hand mullet (Mugil soiuy). Totally, 60 samples of adult golden mullet were collected from these regions. All primer sets as polymorphic loci were used to analyze the genetic variation. Analyses revealed that average of alleles (Na) per locus was 6.2 (range 3 to 9 alleles). All sampled regions contained private alleles. The average estimates of inbreeding coefficient (Fis) values of 6 microsatellites were positive. The average observed and expected heterozygosis was 0.394 and 0.743 respectively. Deviations from Hardy-Weinberg equilibrium were in all cases (P<0.001). F-statistics (Fst) and gene flow (Nm) estimates in allele frequencies were 0.078 and 2.9, respectively. Rst and Fst estimates in AMOVA indicated significant genetic differentiation among regions (P≤0.01). Genetic distance was 0.679, indicating that the genetic difference among the studied populations is pronounced. The data generated in this study provides the genetic variation and differentiation in populations of golden mullet in the southern Caspian Sea (Mazandaran province). Manuscript profile -
Open Access Article
3 - The role of nursery system in the sustainable development of shrimp farming in the country
lafteh mohseninejadAbstractIn this study, the impact of the use nursery system of Litopenaeus vannamei shrimp on the economy for its sustainable development was investigated. Therefore, growth indices and survival indices and daily growth rate of Litopenaeus vannamei shrimp were compared MoreAbstractIn this study, the impact of the use nursery system of Litopenaeus vannamei shrimp on the economy for its sustainable development was investigated. Therefore, growth indices and survival indices and daily growth rate of Litopenaeus vannamei shrimp were compared in two systems with and without immaturity. Three ponds of larval pl12 and another three ponds of unripe shrimp were stored for 45 days in the greenhouse with the same density of 100,000 pieces per hectare in the pound one of the in Abadan Choebdeh shrimp farms. The same food was fed and after 75 days, growth and survival indices, feed conversion ratio and daily growth rate were calculated .The study was performed in 6 pounds of 7000 m2 in two treatments with 3 replications. The breeding period was 75 days and the average temperature was27±5°C. The results showed that in the treatment that used nursery system shrimp in breeding ponds, there was a significant difference in growth, survival and daily growth rate compared to the control group. Also, the production per hectares and final weight were significantly higher than the control group and the feed conversion ratio in the nursery system treatment was significantly lower than the control group. Due to the reduction of shrimp production time in this system compared to the control group. Therefore, nursery system reduces the risk of disease and more economical production and sustainable development of the industry. Manuscript profile -
Open Access Article
4 - Relationship between some physic-chemical characteristics of the water with different densities of warm water culture fishes
zeid ahmadiThis study investigated the relationship between some physic-chemical characteristics of the water ponds with different density of warm water culture fishes. We selected 10 fish ponds with different densities of warm water culture fishes, including densities of 2200, 24 MoreThis study investigated the relationship between some physic-chemical characteristics of the water ponds with different density of warm water culture fishes. We selected 10 fish ponds with different densities of warm water culture fishes, including densities of 2200, 2400, 2600, 2920 and 2950 (part of a hectare). Water characteristics such as Nitrite, pH, Ammonium, Phosphorus, Dissolved Oxygen, Salinity, Ammonia Nitrate, Transparency and Alkalinity were measured. These parameters were estimated by standard methods. One way ANOVA of data showed significant difference between the different densities in most water quality parameters, there was no significant difference between the mean phosphorus, salinity, hardness, transparency and ammonium concentrations. Based on these results, the density had effect on water parameters. Manuscript profile -
Open Access Article
5 - The effects of Saccharomyces cerevisiae and Mannan-Oligosaccharides based nutritional supplements on Levels of Glucose and Cortisol in Environmental stress and furunculosis in rainbow trout
Amin KhodadadiAbstractThe aim of this study is to investigate the effects of complementary rainbow trout diets with different concentrations of prebiotic, which contains active compounds of Saccharomyces cerevisiae with mannan-oligosaccharide (MOS) on environmental stress and resista MoreAbstractThe aim of this study is to investigate the effects of complementary rainbow trout diets with different concentrations of prebiotic, which contains active compounds of Saccharomyces cerevisiae with mannan-oligosaccharide (MOS) on environmental stress and resistance to furunculosis. Three levels of prebiotic (0, 0.1, 0.5 and 1 %) were mixed into pellets. Fish (19.08±1.45 gr) were fed a supplemented commercial diet for 60 days. On day 60 of study, environmental stress such as hypoxia, hyperthermia and induction of experimental diseases with furunculosis (Aeromonas salmonicida) were also performed for all the experimental groups. The blood glucose levels were determined using an enzymatic-based auto analyzer and used to measure cortisol using cortisol ELISA kit and ELISA method. The results of this study showed that different consntersin Celmanax have significantly effect on stress and cortisol and glucose levels (P<0.05). The results showed that rainbow trout resistance was increased with different concentrations level of Celmanax® and few fish were suffering to furunculosis (P<0.05). Based on these findings, it could be concluded that in order to decrease and enhance the streets and improve rainbow trout resistance, it is appropriate to add different concentrations level of Celmanax® prebiotic. Manuscript profile -
Open Access Article
6 - Age, growth and reproduction characteristics of brond-snout (Chondrostoma regium) in Alvand River (Kermanshah province)
Mehdi Shamsaie MehrganAbstractIn this study, some characteristics of growth, age and reproduction of brond-snout (Chondrostoma regium) population were studied in Alvand River of Kermanshah province monthly for one year from June 2019 to May 2020. A total of 6 age groups (1-6) were identified MoreAbstractIn this study, some characteristics of growth, age and reproduction of brond-snout (Chondrostoma regium) population were studied in Alvand River of Kermanshah province monthly for one year from June 2019 to May 2020. A total of 6 age groups (1-6) were identified. 120 females and 105 males with a sex ratio (female to male) 1.06: 1 was detected from 225 caught fish. The predominant age was 4 years and the mean total length in the males and females were 205.23±22.42 mm and 234.09 ±29.42 mm, respectively, which showed a significant difference between the genders (p≤0.05). The length-weight linear relationship for male and female were Lt = 310[1-e -0.31(t+0.52)] and Lt = 327[1-e -0.34(t+0.49)], respectively. The growth pattern for male and female was allometric negative and allometric positive, respectively, and the mean obesity coefficient for male and female were 1.01±0.11 and 0.99±0.08, respectively. The mean absolute fecundity of fish was 11921.22±2284.54, which increased with the age and decreased egg diameter. The mean gonad index for male and female was 1.8±0.13 and 8.64±0.72, respectively (p≤0.05). Manuscript profile
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