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  • 1
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    Effects of oral administration of Zataria multiflora essential oil on some blood and serum parameters in Acipenser persicus (2018)
    Details
    Publication Date: 2021-05-19
    Description: In order to does this study, 150 Persian sturgeons having 75g mean weight transferred to 500 liter tanks. After dividing the fishes into two groups (experimental and control), the fingerlings fed by concentrate food that contained different levels of Zataria multiflora essential oil (15, 25, 50, 100 g/kg) for 8 weeks. Finally, sampling carried out on blood and serum of fishes. After preparing the samples based on standard methods, hematology and serology studies, performed. The results showed significant difference in mean of monocytes between experimental and control groups (P〈0.05). In treatment 25g/kg, monocyte count was more than other treatments. But there were no significant differences in mean and standard deviation of other white blood cells. The results of serologic studies showed no significant differences in serum indices (C3, C4 and total protein) (P〉0.05), but there is significant difference in mean and standard deviation of albumin. So that, the average in treatments 15 and 25g/kg and control group was more than treatments 50 and 100g/kg of Zataria multiflora essential oil.
    Description: Published
    Keywords: Biology ; Physiology ; Zataria multiflora ; Essential oil ; Hematology ; Serology ; Persian Sturgeon ; Blood ; Serum
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.908-915
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  • 2
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    A study on growth parameters, blood factors and proximate composition of rainbow trout (Oncorhynchus mykiss) cultured in underground brackish and freshwater (2018)
    Details
    Publication Date: 2021-05-19
    Description: In this research, growth rate, blood parameters and proximate composition of rainbow trout (Oncorhynchus mykiss) cultured in brackish and freshwater were evaluated. Two treatments (brackish and freshwater) in 3 replications were investigated. Six 1.5 m³ fiberglass tanks were used for this experiment, containing 180 rainbow trout specimens with average weight of 47.2±0.1g. Feeding rate in treatments was about 3% of body weight based on water temperature and fish biomass. Total length and weight of fish were measured in 15 days intervals. After 135 days of culture period, some fish samples were transferred to the Lab. Blood were directly collected from the heart. Muscle composition was analyzed for proximate composition. The results showed that the body weight of samples in brackish water was increased significantly after 45 days of culture period. Blood factors including WBC, RBC, Hb, Hct, MCV, MCH, MCHC, lymphocyte, thrombocyte and concentration of K+ ions in fish cultured in brackish water showed a significant increase (P〈0.05). Muscle composition analysis showed a significant increasing (p〈0.05) in fat and dry matter in freshwater treatment, while moisture was significantly higher in brackish water (P〈0.01)
    Description: Published
    Keywords: Biology ; Physiology ; Oncorhynchus mykiss ; Brackish ; Rainbow trout ; Brackish water ; Freshwater ; Blood factors ; Proximate composition ; Growth ; Feeding
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.836-842
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  • 3
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    Effect of synthetic and algal astaxanthin levels on egg astaxanthin content of rainbow trout (Oncorhynchus mykiss) (2021)
    In:  http://aquaticcommons.org/id/eprint/22105 | 18721 | 2018-02-08 03:42:11 | 22105 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-06-26
    Description: This research was done in a trout farm in Kohkiloyeh and Boyer- Ahmad province. The main object of this study was comparing of two sources of astaxanthin (synthetic or algae) in feed on astaxanthin content of egg in rainbow trout. It was considered seven groups consisting six treatments (T1-T6) in two different astaxanthin sources and a control (C) (without astaxanthin). So, algal astaxanthin (haematococcus pluvialis) in the three levels of 2.67, 3.55 and 8gr/kg food (T1,T2, T3); and synthetic astaxanthin in three levels of 40, 80 and 120mg/kg food in diet (T4, T5, T6) examined on 140 trout broods (3-4 years) for 4 months, before the spawning season. Astaxanthin content of obtained eggs from all treatments in spawning season was measured by HPLC apparatus. The highest and the lowest amount of egg astaxanthin were observed in T3 and C respectively. In each astaxanthin group, a significant difference was obtained between averages in treatments (P 〈0.05), as T3 was the highest between them. No significant difference was observed between synthetic astaxanthin treatments (T4, T5 and T6) and T1 (the lowest level of algal astaxanthin). Treatments T2 and T6 also had the same function in term of saving astaxanthin in eggs. It also concluded that natural astaxanthin (Haematococcus pluvialis) for the reason that contains supplementary nutritious, is extraordinary preferable than synthetic astaxanthin to improve astaxanthin content of egg in rainbow trout.
    Keywords: Biology ; Chemistry ; Fisheries ; rainbow trout ; egg astaxanthin content ; algal astaxanthin ; Haematococcus ; Oncorhynchus mykiss ; Iran pluvialis
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 149-160
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  • 4
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    A study on growth parameters, blood factors and proximate composition of rainbow trout (Oncorhynchus mykiss) cultured in underground brackish and freshwater (2021)
    In:  http://aquaticcommons.org/id/eprint/22650 | 18721 | 2018-05-08 22:27:14 | 22650 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-08
    Description: In this research, growth rate, blood parameters and proximate composition of rainbow trout (Oncorhynchus mykiss) cultured in brackish and freshwater were evaluated. Two treatments (brackish and freshwater) in 3 replications were investigated. Six 1.5 m³ fiberglass tanks were used for this experiment, containing 180 rainbow trout specimens with average weight of 47.2±0.1g. Feeding rate in treatments was about 3% of body weight based on water temperature and fish biomass. Total length and weight of fish were measured in 15 days intervals. After 135 days of culture period, some fish samples were transferred to the Lab. Blood were directly collected from the heart. Muscle composition was analyzed for proximate composition. The results showed that the body weight of samples in brackish water was increased significantly after 45 days of culture period. Blood factors including WBC, RBC, Hb, Hct, MCV, MCH, MCHC, lymphocyte, thrombocyte and concentration of K+ ions in fish cultured in brackish water showed a significant increase (P〈0.05). Muscle composition analysis showed a significant increasing (p〈0.05) in fat and dry matter in freshwater treatment, while moisture was significantly higher in brackish water (P〈0.01).
    Description: Article includes abstract in Farsi on last page.
    Keywords: Aquaculture ; Biology ; Fisheries ; Rainbow trout ; brackish water ; freshwater ; blood factors ; proximate composition ; growth ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 836-842
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  • 5
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    Parasitic infection among larvae and fingerlings of the Persian sturgeon (Acipenser persicus) in Vniro tanks and earthen ponds (2021)
    In:  http://aquaticcommons.org/id/eprint/22380 | 18721 | 2018-04-01 19:33:20 | 22380 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-04
    Description: This study was conducted in two phases on sturgeon larvae and fingerlings produced from artificial breeding of five pairs of the Persian sturgeon (Acipenser persicus) broodstocks in Shahid Beheshti Hatchery in spring and summer 2006. Initially, 600 larvae were collected on 3 post days hatching (pdh) and 5 days after the onset of exogenous feeding. The second phase was conducted with 450 specimens collected from five earthen ponds, which included 150 larvae collected one week after stocking, 150 fingerlings collected 20 days after stocking and 150 fingerlings collected at the time of their release into rivers. No parasite was observed in the sturgeon larvae on day 3 pdh and 5 days after the onset of exogenous feeding. However Trichodina reticulata were observed in the larvae in the first week (prevalence = 10 - 20%) and also in the fingerlings (prevalence = 10 - 46.67%) 20 days after they were transferred to the earthen ponds. At the time of their release into the river, in addition to T. reticulata (prevalence = 13.33 – 100%) a digenean trematode, Diplostomum spathaceum, (prevalence = 6.67 - 30%) was also observed in the sturgeon fingerlings. It is evident from the present study that Trichodina and Diplostomum infection occurs after fingerlings are released into the earthen ponds and gradually increases with the progress in the rearing period. Increase in prevalence of Trichodina infection through the rearing period can be explained by the increase in water temperature and increase in dissolved organic matter in the ponds which provide the desirable conditions for the propagation of this unicellular ciliate. Significant differences were observed in the mean intensity of T. reticulata infection in sturgeon fingerlings during different stages of rearing into earthen ponds (P〈0.05).
    Keywords: Biology ; Fisheries ; Acipenser persicus ; Parasite ; Larvae ; Fingerling ; Trichodina reticulata ; Diplostomum spathaceum ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 342-351
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  • 6
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    Study on nursery growth performance of Pacific white shrimp (Litopenaeus vannamei Boone, 1931) under different feeding levels in zero water exchange system (2021)
    In:  http://aquaticcommons.org/id/eprint/22966 | 18721 | 2018-06-08 20:17:50 | 22966 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-12
    Description: Effect of different feeding levels on water quality, growth performance, survival rate and body composition of Pacific white shrimp Litopenaeus vannamei post larvae were studied in zero water exchange system. Shrimp post larvae with mean weight of 74.46± 6.17 mg were fed for 32 days in 300L fiberglass tanks containing 130L water at density of 1 post larvae L^-1. There were five treatments including control and four biofloc treatments with different feeding levels of 15%, 15%, 12%, 9%, 0% of body weight per day, respectively. The results showed that there were no significant differences in water parameters such as dissolved oxygen and pH between different treatments (p〉0.05). There were significant differences in water ammonia level between different treatments (p〈0.05). The maximum (0.39 mg/L) and minimum (0.12 mg/L) levels of ammonia were observed in control and biofloc treatment with minimum feeding level (9%BW/day), respectively. The highest body weight gain (1.55g), growth rate (48.50 mg per day), specific growth rate (9.64%/day), biomass gain (182.1g) and body length increase (33.62mm) were observed in biofloc treatment with maximum feeding level. The highest feed conversion ratio and the lowest feed efficiency were obtained in control (p〈0.05). The proximate body composition analysis revealed an increase in lipid, protein and ash in biofloc treatments. Results showed that using biofloc technology can decrease water exchange amount and improve feed utilization in nursery culture of Pacific white shrimp. Moreover, presence of biofloc improved the water quality which led to the enhancement in growth performance in nursery stage of shrimp.
    Keywords: Aquaculture ; Biology ; Chemistry ; Biofloc technology ; Zero-water exchange system ; Water quality ; Growth performance ; Body composition ; Nursery ; Pacific white shrimp ; aquaculture ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 1465-1484
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  • 7
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    Comparative study on gonad development in rainbow trout (Oncorhynchus mykiss) reared in fresh and brackish water in the Yazd Province (2021)
    In:  http://aquaticcommons.org/id/eprint/24682 | 18721 | 2018-08-04 15:33:20 | 24682 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-15
    Description: Rainbow trout (Oncorhylichus mikiss) weidting 200±5 grams were used in this study to compare their gonad development in fresh and brackish water in Yazd Province. The culture period lasted 140 days from October to March 2003 during which time the temperature 03.8+0.6), pH (8.18±0.12) and dissolved oxygen (6.2+0.11) of fresh and brackish water were kept nearly constant. The salinity of fresh and brackish water was 0.4 -0.5 and 14.3-14.7ppt respectively. The fish were fed common commercial trout food (Chineh GFT2) based on temperature and biomass. Histological studies indicated that the gonad development is accelerated in brackish water where the males mature two month eal her than those reared in freshwater. The gonadosomatic index (G51) also affirmed the gonad development (P〈0.05).
    Keywords: Biology ; Gonad development ; Rainbow trout ; Oncorhynchus mykiss ; Histological study ; Yazd Province ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 113-126
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  • 8
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    Determining nutritional requirements in Beluga (H.huso) from larval stage to marketable size (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25107 | 18721 | 2018-08-24 06:13:27 | 25107 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Growth experiments were designed and conducted in several phases in order to determine the most suitable starter diet, to determine the effects of different levels of protein and energy and also to determine the effects of different ratios of carbohydrate to fat on growth and body composition in farmed Huso huso from the larval stage up to the marketing stage. Phase one Growth experiments were conducted in a random statistical design to compare growth trends in H. huso larvae (mean weight 105.02 ± 0,02 mg) without being adapted to formulated diets. Experiments were conducted in fibreglass tanks (500 litre capacity) under similar culture conditions. Four replicates were run for each experiment. Larvae were fed four types of formulated diets (Diet A=100 % formulated diet produced in the International sturgeon Research Institute, Diet B=formulated diet imported from Holland, Diet C= formulated diet imported from France, Diet D= a mixture of Diet A + 10% gammarus) 8 times a day to satiation for a period of 49 days. The results obtained were compared with those obtained for the control group that was fed live food (Daphnia and Artemia). Mean water temperature during the experimental period was 18.52 ± 0.48 °C and mean dissolved oxygen was 7.35 ± 0.18 mg/l. The first signs of food granules were observed in the guts of the larvae after 12 h of the first feeding. All experimental groups were adapted to granulated diets on day 3 to day 5. In the beginning of the experimental period the larvae showed a no normal distribution (P 0.05) in terms of weight and length. However significant differences were observed in the end of the experimental period among the different groups studied in terms of growth, specific growth rate and food efficiency (P 0.05). Growth in group B and D were significantly higher than that in other groups except for the control group (P 0.05). It may thus be concluded that the olfactory organs of larvae took to Diet B (may be due to its composition) and to the diet D (because of its odour, texture and suitable flavour) more readily than other diets. At the end of the experimental period, maximum survival (98%) belonged to the control group. Survival rate in Group B and Group D was 90 % and 86.5%, respectively (P 0.05). Minimum survival belonged to fish fed Diet A (29.7%) and Diet C (45.5%). With regard to the adaptability of larvae to formulated diets, survival rates and growth and development in larvae we may conclude that the effects of different formulated diets on growth in larvae can be conducted on larvae with a mean body weight between 100 to 120 mg. In this weight class the digestive system and olfactory organ are fully developed and play a vital role in searching for food particles.
    Keywords: Aquaculture ; Biology ; Iran ; Huso huso ; Protein to energy ratio ; Carbohydrate to fat ratio ; Body composition ; SGR
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 254
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  • 9
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    Comparison of muscular tissue composition of rainbow trout in brackish and different salinity waters (2021)
    In:  http://aquaticcommons.org/id/eprint/21859 | 18721 | 2018-01-12 14:48:38 | 21859 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-03
    Description: In this research, controlled changes of rainbow trout muscular composition cultured in brackish water (14.1ppt) and freshwater (4.3ppt) was compared. Some 180 juvenile rainbow trout with a weight of 47.2±0.1g each were released in 6 polyethylene tanks with a capacity of 1.5m³. During the experiment, water temperature was kept constant. Feeding fish was conducted using common Faradaneh food and considering water temperature and fish biomass. After 126 days, fishes attained around 320±20g of weight, were sampled and taken to laboratory and the amount of protein, fat, ash, minerals and moisture in their muscle tissue were measured. Results showed amount of fat and dry matter in brackish water cultured fishes is less than those cultured in freshwater. The average percentage of protein and minerals in brackish freshwater cultured fishes were significantly different and the average percentage of moisture in brackish water cultured fish was higher than those of the freshwater fish.
    Keywords: Biology ; Fisheries ; Salmon Fishes ; Brackish water ; Fresh water ; Muscular composition ; iran ; Comparison ; tissue ; fish
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 167-172
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  • 10
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    Effect of different feeding levels on water quality, growth performance and survival of western white shrimp (Litopenaeus vannamei Boone, 1931) post larvae with application of biofloc technology (2021)
    In:  http://aquaticcommons.org/id/eprint/22049 | 18721 | 2018-01-25 08:43:37 | 22049 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-07
    Description: In this study, effect of different feeding levels on water quality, growth performance and survival of western white shrimp Litopenaeus vannamei post larvae were studied in biofloc rearing system. Shrimp postlarvae of PL10 with mean weight of 3±0.7 mg and mean length of 4.4± 0.93 mm were fed for three weeks in fiberglass containers with 200 liters volume of water and density of 10 post larvae per liter in four tretments including one control with water exchange and three biofloc treatments at different feeding levels of 25, 20 and 15% of body weight. According to the results, in the values of water quality parameters including salinity, dissolved oxygen, pH, nitrite and nitrate, no significant differences were observed among the groups (p〉0.05). The highest increase in body weight (58.42 mg), growth rate (2.78 mg per day), specific growth rate (15.09 %/day), biomass (84020 mg) and survival rate (71.9%) were obtained in biofloc treatment at 25% feeding level. The highest feed conversion ratio (2.05) and the lowest feed efficiency (48.62%) were obtained in water exchange treatment without floc, showing significant difference compared to the other treatments (P〈 0.05). The results from this study reveals that by using biofloc rearing technology can decrease the amount of water exchange and feed utilization compared to body weight in culture of western white shrimp post larvae. Moreover, the presence of biofloc improves growth performance and production of L. vannamei post larvae in biofloc rearing system.
    Keywords: Aquaculture ; Biology ; Ecology ; Biofloc technology ; Water quality ; Growth performance ; Survival ; Litopenaeus vannamei ; feeding ; levels ; white shrimp ; biofloc ; application ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 13-28
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