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  • Biology  (34)
  • 1
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    Proximate composition and fatty acids profiles of Artemia cysts, and nauplii from different geographical regions of Iran (2018)
    Details
    Publication Date: 2021-05-19
    Description: Artemia has been widely used in aquaculture as a suitable live food. The presence of highly unsaturated fatty acids is a key factor that determines the nutritional value and marketing of Artemia for shrimp, marine larvae, sturgeon and ornamental fish industries. To determine the variation in nutritional content in cysts, decapsulated cysts and nauplii of Artemia from three different biotopes of Iran, were tested for their protein, lipid, energy, and fatty acid profiles, particularly essential fatty acids. The cysts collected from Urmia, Maharlou and Meighan lakes, were rinsed, processed, decapsulated, hatched and then analyzed for proximate and fatty acid composition using standard methods. Statistical comparisons of the results revealed significant differences not only in proximate composition but also in fatty acid contents (p〈0.05). The highest mean (±SD) level of protein (60.5±3.3 %), lipid (18.60±1.1%) and energy contents (5448.3±10.4 Kcal/kg) were observed in Instar I nauplii hatched from Urmia Lake cysts, Instar I nauplii hatched from Maharlou Lake cyst and Instar I nauplii hatched from Urmia Lake decapsulated cyst, respectively. The highest content of DHA (0.78 mg/g DW) was observed in nauplii of cysts from Urmia Lake whereas, it was around zero in other samples. The highest level of EPA (24.24 mg/g DW) was measured in nauplii from Maharlou Lake decapsulated cysts and the lowest (0.24 mg/g DW) was observed in Urmia lake cysts. The results revealed that the nauplii from decapsulated cysts of Maharlou Lake Artemia contained significantly higher levels of EPA and n-3 HUFA compared to others. Therefore, it is recommended to use it in aquatic larviculture.
    Description: Published
    Keywords: Biology ; Physiology ; Artemia ; Cyst ; Decapsulated cyst ; Nauplii ; Nutritional value
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.761-775
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  • 2
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    Morphological characteristics of lapillus and aging of Plicofollis dussumieri (Ruppell, 1837) from Oman Sea (2018)
    Details
    Publication Date: 2021-05-19
    Description: In this paper age determination and morphological characteristics of blacktip catfish, Plicofollis dussumieri, from Oman Sea were evaluated. A total of 132 fish specimens were collected from fishing trawlers or landings from March 2011 to July 2012, with minimum and maximum of 245 mm, 195 g and 767 mm, 5801 g, respectively. Maximum life span was 12 years for the length range of 245 – 767 mm FL, while total body weight (BW) ranged between 195 and 5801 g and the resultant equation was: W = 0.040 L2.8275 (R2 = 0.99). High correlation coefficient value found between age and FL was R= 0.97 and for age-BW was 0.94. This value for otolith weight and BW was estimated to be 0.91 and showing that there were significant correlations between measured parameters. Lapillus otolith in blacktip catfish is the biggest otolith among most teleostei fishes, also the Sagitta is the biggest. Lapillus of this species is round, robust, onion-like and without sulcus curve, with no obvious growth increments in rostrum and antirostrum zones. In ventral side Gibbus maculae is concave having prominentia marginalis in anterior and basal line in posterior parts.
    Description: Published
    Keywords: Biology ; Physiology ; Plicofollis dussumieri ; Catfish ; Blacktip catfish ; Morphology ; Age ; Otolith ; Lapillus
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.494-502
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  • 3
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    Some biological aspects and biomass estimation of Artemia in Maharloo Lake (2018)
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    Publication Date: 2021-05-19
    Description: Maharloo lake (near Fars province) with a considerable restricted abiotic conditions such as very high salinity (300 g/lit) and a relatively high water temperature is inhabited by the brine-shrimp (Artemia parthenogenetica). This species has a worldwide distribution and in research, biology and biomass estimation of Artemia were studied. The sampling was carried out monthly and in addition to biomass estimation; spatial and temporal distribution patterns and reproduction behaviour were investigated. Simultaneously with field studies in lake ecosystem, some were transported laboratory and preserved in aquarium for further hatching experiments under suitable condition of light, aeration and feeding, In this way, hatching percentage, life cycle and different larval stages were determined. Also, other information related morphology and physiology characteristics of them were collected. The mean biomass of Artemia in Maharloo Lake was estimated 2.53 g/m3 per year.
    Description: Published
    Keywords: Biological ; Morphology ; Physiology ; Biomass ; Artemia ; Salinity ; Temperature ; Brine-shrimp ; Artemia parthenogenetica ; Species ; Density ; Biology
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.11-28
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  • 4
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    Effect of garlic extract on growth and survival rate in Litopenaeus vannami post larvae (2021)
    In:  http://aquaticcommons.org/id/eprint/21878 | 18721 | 2018-01-15 09:23:51 | 21878 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-03
    Description: The effect of garlic extract on growth and survival rates of one day larvae of Litopenaeus vannamei shrimp was tested for 12 days .Six nutritional treatments each with three replicates were fed to shrimp larvae (average weight 0.0013g) including control treatment (unriched Artemia nauplii) and second to sixth Artemia nauplii enriched with 200, 400, 600, 800 and 1000mg garlic extract per kg, respectively. The one way ANOVA results showed that all treatments were different in terms of average weight and total length of larvae compared to control group. Shrimps being fed by Artesia enriched with 200mg garlic extract per kg food have the best growth, survival rates and length (0.0062mg, 81.6% and 10.6mm). Group 3 with concentration of 400mg garlic extract per kg of feed followed by control group showed better growth and survival rates in shrimp larvae than other treatments but the lowest survival rate evaluated in shrimps fed by Artemia nauplii enriched with 600, 800 and 1000mg garlic extract per kg feed, orderly. Specific growth rates (SGR) for treatment groups 2 and 3 were higher compared to other groups.
    Keywords: Aquaculture ; Biology ; Medicinal plants ; Aquaculture ; Nutrition ; Shrimp ; growth ; survival ; Litopenaeus vannamei ; larval ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 39-46
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  • 5
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    The evaluation of dietary garlic powder on growth performance, survival rate and body composition of Litopenaeus vannamei cultured by Caspian Sea water (2021)
    In:  http://aquaticcommons.org/id/eprint/22121 | 18721 | 2018-02-12 10:51:01 | 22121 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-06-27
    Description: This study was conducted to evaluate the effects of different levels of garlic powder on growth factors, survival rate and body composition of cultured Litopenaeus vannamei by Caspian Sea water. Four groups of beluga sturgeon with mean weight of 34.20± 0.44 g were raised for 56 days in fiber glass tanks (20 shrimp to each tank) and feeding with different levels of garlic powder with concentrations of 0%, 0.25%, 0.5% and 1.0% (Three replicates were used for each concentration). At the end of the trial, growth factors (Mean weight increased, percent of weight increased, feed conversion ratio and specific growth rate) and body composition were determined and compared with control group. Our results confirmed that shrimp fed on diet supplemented with 1.0 % garlic powder had significantly higher growth factors and survival rate compared to other treatments (P0.05). Based on the results, using of garlic powder, especially at the level of 1.0% in order to improve the growth performance, survival rate and body composition of L. vannamei is recommended.
    Keywords: Aquaculture ; Biology ; White leg shrimp ; Litopenaeus vannamei ; Garlic powder ; Growth ; performance ; Survival ; Body composition ; feeding ; evaluation ; dietary ; Caspian Sea ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 143-150
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  • 6
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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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  • 7
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    Morphological characteristics of lapillus and aging of Plicofollis dussumieri (Ruppell, 1837) from Oman Sea (2021)
    In:  http://aquaticcommons.org/id/eprint/22792 | 18721 | 2018-05-22 19:40:40 | 22792 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-10
    Description: In this paper age determination and morphological characteristics of blacktip catfish, Plicofollis dussumieri, from Oman Sea were evaluated. A total of 132 fish specimens were collected from fishing trawlers or landings from March 2011 to July 2012, with minimum and maximum of 245 mm, 195 g; and 767 mm, 5801 g, respectively. Maximum life span was 12 years for the length range of 245 – 767 mm FL, while total body weight (BW) ranged between 195 and 5801 g and the resultant equation was: W = 0.040 L^2.8275 (R^2 = 0.99). High correlation coefficient value found between age and FL was R= 0.97 and for age-BW was 0.94. This value for otolith weight and BW was estimated to be 0.91 and showing that there were significant correlations between measured parameters. Lapillus otolith in blacktip catfish is the biggest otolith among most teleostei fishes, also the Sagitta is the biggest. Lapillus of this species is round, robust, onion-like and without sulcus curve, with no obvious growth increments in rostrum and antirostrum zones. In ventral side Gibbus maculae is concave having prominentia marginalis in anterior and basal line in posterior parts.
    Keywords: Biology ; Fisheries ; Blacktip catfish ; Morphology ; Age ; Otolith ; Oman Sea ; Biology ; Physiology ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 494-502
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  • 8
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    Effects of ICES30/4-enriched Artemia urmiana nauplii on growth, survival, salinity tolerance and fatty acid composition of Acipenser persicus larvae (2021)
    In:  http://aquaticcommons.org/id/eprint/22858 | 18721 | 2018-05-30 19:49:05 | 22858 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-10
    Description: Effects of Artemia urmiana enriched with ICES30/4 as a commercial emulsion of highly unsaturated fatty acid (HUFA) on growth, survival, salinity tolerance and fatty acid composition of the Persian sturgeon larvae were evaluated. Artemia enriched for two different time periods (12 and 24 hours) and non-enriched artemia were fed to A. persicus larvae (average initial wet weight 46.80± 2.03mg) during 20 days. The n3-HUFA content ranged from 0.82±0.08 mg/g DW in non-enriched artemia to 7.69±0.2 mg/g DW in enriched artemia during 24 h with ICES30/4 and ranged from 3.20±0.30 mg/g DW in sturgeon fish larvae fed with non-enriched artemia to 5.98±0.43 mg/g DW in fish larvae fed with 24 h-artemia enriched with ICES30/4 after 20 days. The n3-HUFA content significantly increased compared to 12 h enrichment period both in artemia and sturgeons fed with these artemia (p〈0.05). A significant increase in survival percentages and salinity tolerance were observed between fish larvae fed with enriched and non-enriched artemia (p〈0.05), while growth rate did not significantly differ among the treatments (p〉0.05).
    Keywords: Aquaculture ; Biology ; Fisheries ; Artemia urmiana ; Persian sturgeon (Acipenser persicus) ; Enrichment ; Growth ; Survival performance ; Fatty acids composition ; aquaculture ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 183-193
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  • 9
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    Evaluation of some feeding indices of Pomadasys kaakan in the northern Persian Gulf (2021)
    In:  http://aquaticcommons.org/id/eprint/22441 | 18721 | 2018-04-09 19:29:38 | 22441 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-05
    Description: In this paper the Vacuity Index (VI), Fullness Index (FI) and Food Preference Index (FPI) for the stomach contents of Pomadasys kaakan were evaluated to assess the quantity and kind of food which this fish consumes in the Persian Gulf. A total of 227 specimens were collected from fishing trawlers or landings from November 2005 to September 2006. 24.7% of stomachs were full, 11.9% were semi-full and 63.4% were empty. The seasonal average of VI was 77.4, 44.6, 80.0 and 54.0 % for autumn, winter, spring and summer, respectively. The overall FI was 36.6 with seasonal averages of 22.6, 55.4, 20.0 and 46.0 in autumn, winter, spring and summer, respectively. The main stomach contents were crustaceans (esp. crab & shrimp), fish, mollusks (bivalves, gastropods and cuttlefish), stomatopoda, brittle stars, Lingula sp. and sea weeds. The estimated FPIs for crustaceans were 77.7, fish 32.1, mollusks 28.6 and echinoderms 18.8 %. Overall, the results show that this fish is a relatively frugal species which consumes crustaceans as main food and has adopted itself with ecological changes of the Persian Gulf.
    Keywords: Biology ; Ecology ; Fisheries ; Pomadasys kaakan ; Feeding ; Food Preference ; Vacuity and Fullness Indices ; Persian Gulf ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 497-504
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  • 10
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    Dietary effects of seaweed Sargassum ilicifolium on reducing cholesterol level of white leg shrimp (Litopenaeus vannamei) (2021)
    In:  http://aquaticcommons.org/id/eprint/23157 | 18721 | 2018-06-18 22:34:29 | 23157 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-13
    Description: In this research, the nutritional effects of Sargassum ilicifolium Chabahar Bay, Oman Sea, on cholesterol levels of white-leg shrimp (Litopenaeus vannamei) were studied. The seaweed was collected from coastal areas, rinsed, dried, powdered and the nutritional values were measured in the laboratory. A part of protein resources of shrimp feed replaced with seaweed powder in four treatments (D: as control without any replacement) C: with 5%, B: 10 % and A: 15% seaweed replacement, each with three replicates in order to obtain isonitrogenus 33% CP., and Isocaloric (13% fat and 15% carbohydrate) feed. Dried diets were used according to the daily need of shrimp, calculated after each 10 day biometry. Water stability and absorption capacity of the pellets in sea water were measured and compared statistically. Juvenile shrimps (Initial body weight=3 g) were acclimated for one week under hatchery conditions and were fed 3-5% of their body weight. Abiotic parameters, weight and length biometry were measured on day two and day 10, respectively. After 45 days final biometry, body analysis were measured, and muscle colorimeter were conducted using HPLC. There were no significant differences (p〉0.05) between body lipid among treatments, but cholesterol content (mg/100gWW) showed significant differences (p〈0.05), the lowest (121.68±12.12) was in treatment A, and the highest in D (147.92±11.02). Treatments A and B showed color changes to pink-partial orange and pink in shrimp muscle with no differences compared to white and no color in shrimp in treatments C and D. It seems that this color change plays a major role in market acceptability.
    Keywords: Aquaculture ; Biology ; Fisheries ; Cholesterol ; Color ; Feed ; White-leg shrimp ; Seaweed ; Chabahar Bay ; Oman Sea ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 1248-1256
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