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  • 1
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    Changes of fatty acid profiles in fillets of Cobia (Rachycentron canadum) during frozen storage (2018)
    Details
    Publication Date: 2021-05-19
    Description: In this study changes in fatty acids profile during frozen storage at -18°C of Cobia (Rachycentron canadum), caught from the Persian Gulf (Bandar Abbas) were studied. Changes in saturated fatty acids (SFAs), monounsaturated fatty acids (MUFAs), polyunsaturated fatty acids (PUFAs), EPA+DHA/C16, n-3 PUFA/n-6 PUFA (n-3/n-6) and polyunsaturated fatty acids /saturated fatty acids (PUFA/SFA) were investigated during a six- month storage at -18°C. Eighteen fatty acids were found in Cobia, with higher percentage of saturated fatty acids (46.07%), monounsaturated fatty acids (33.72%) and polyunsaturated fatty acids (15.44%). The MUFAs and PUFAs reduced from 33.72 to 26.26% and 15.44 to 10.78%, respectively. Palmitic acid (C16:0, 27.42% of total fatty acids) and stearic acid (C18:0, 12.62%) were the dominant saturated fatty acids. The major unsaturated fatty acids were determined as docosahexaenoic acid (C22:6n3, 5.76%), oleic acid (C18:1n9, 25.76%) and linoleic acid (C18:2n6, 4.38%). As a result of the frozen storage (up to 6 months), marked content decreases were found in fatty acid groups such as monounsaturated, polyunsaturated and n-3 polyunsaturated, as well as in the n-3/n-6 ratio and it means that the nutritional value of Cobia has decreased.
    Description: Published
    Keywords: Rachycentron canadum ; Cobia ; Fish ; Fatty acids ; Frozen storage
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.204-213
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  • 2
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    Reproductive biology of the white spotted rabbit fish, Siganus sutor, in culture conditions (2018)
    Details
    Publication Date: 2021-05-19
    Description: Growth of gonads and spawning time in white spotted rabbit fish, Siganus sutor, in culture conditions were surveyed. Around 800 juveniles weighing 50-80g were captured from wild and stocked at a density of a15 ind/m super(3) in concrete tanks during years 2004-2005 located in the Persian Gulf &Oman Sea Ecology Research Center. The fishes were cultured for about 12 and 24 mounts to obtain 1 year and 2 year old specimens. Culture was continued till the year 2007. Using 574 records, the length-weight relationship was determined as W=0.0155(FL). Results revealed that Siganus sutor has alometric growth. Monthly changes in GSI showed the lowest GSI values at stage I and V. We observed that GSI values of females and males peaked in April and May. The total fecundity of Siganus sutorranged from 170,000 to 1,300,000 oocytes in specimens of 22-35cm, F.L. 215-800 g B.W. and ovary weight of 15-117g. The average (cSE) total fecundity was 737931.03 plus or minus 77503.41 oocytes per female. The relative fecundity ranged from 458.47 oocytes to 2303.80 oocytes per g B.W. with an average (cSE) of 1606.31 plus or minus 131.89 oocytes per g B.W. Results showed the best time for S. sutoe to culture is month of May According to the results, one year old males are mature and produce sperm whereas females are ready to reproduce at age 2.
    Description: Published
    Keywords: Spawning seasons ; Spawning ; Fish culture ; Siganus sutor ; Length-weight relationships ; Juveniles ; Gonadosomatic index ; Growth ; Fecundity ; Density ; Gonads ; Marine
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.119-128
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  • 3
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    Laboratories Risks Evaluation of Persian Gulf and Oman Sea Ecological Research Center (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: In this study, to assess and classify risks associated with working in the laboratories of Persian Gulf and Oman Sea Ecological Research Center, the method of " Failure Mode Effects Analysis " (FMEA) as well as some statistical methods were used. The results of the risk assessment in the 11 affiliated laboratories showed that the risk levels in all cases, except for benthos laboratory, could be evaluated as moderate or high and therefore appropriate corrective actions must be implemented. Based on the results of the Kruskal-Wallis tests both before and after the corrective actions, there were significant differences between the laboratories from the viewpoint of risk priority number (RPN). The post hoc tests showed the lowest risk levels for the benthose and histology laboratories, while the highest risks identified in the laboratory of instrumental analysis. The results of the classification of the laboratories using cluster analysis are largely similar to those of the posthoc tests. According to Mann-Whitney U test, only in the case of the samples preparation laboratory, significant differences between the values of the RPN before and after the corrective actions could be observed (p〉 0.05), however, the risk levels still remained high. In general it can be concluded that FMEA is an effective method for risk assessment in the research laboratories and appropriate statistical methods can also be used for complementary analysis.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Risk assessment ; Persian Gulf and Oman Sea Ecological Research Center ; Risk priority number ; Failure Mode Effects Analysis ; Evaluation
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 68pp.
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  • 4
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    Gracilaria corticata cultivation in fiberglass tanks and Agar extraction (2018)
    Details
    Publication Date: 2021-05-19
    Description: In order to culture the G. corticata for further agar extraction, during one year study (2001), 3 treatments with 3 different densities of 500, 1000 and 2000 g/m2 and 3 replicates were cultured in fiberglass tanks. During the culture period the parameters of temperature, pH and salinity were measured and 30-40 percent of water was exchanged once every two days. The aeration activity was constantly done and also 0.5g urea added into the water after exchanging the water. The biometric measurement of algae was carried out every week and ultimately end of the period culture, the daily growth and net production (wet weight) was calculated in proportion to g/m2. Also, amount of extracted agar (dry weight) estimated seasonally. In winter, the daily growth (%), net production and agar extracted (%) were estimated 1.46±0.11, 11.5±3.57 and 17.5%, in which these figures for three other seasons of spring, summer and autumn were: 3.74±0.31, 38.3±5.4, 19.3 and 1.5±0.28, 12.43±3.3, 14% and 3.11±0.04, 26.9±0.61 and 15%, respectively. Some epiphytes and grazers were recognized in algae cultivation tanks such as Navicula, Nitzschia, Oscillatoria, Peridinium, Chaetoceros, Enteromorpha, Ulva, and Isopoda, Nemertine and Nereis. Two seasons of spring and autumn showed the best daily growth and net production, and also the 500 g/m2 treatment was recognized the best culture treatment.
    Description: Published
    Keywords: Gracilaria corticata ; Agar ; Culture ; Extraction ; G. corticata ; Temperature ; pH ; Salinity ; Epiphytes ; Grazers ; Algae ; Navicula ; Nitzschia ; Oscillatoria ; Peridinium ; Chaetoceros ; Enteromorpha ; Ulva ; Isopoda ; Nemertine ; Nereis
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.27-38
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  • 5
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    Changes in the Quality of Lanternfish Benthosema pterotum during Transportation at Ambient Temperatures (2018)
    Details
    Publication Date: 2021-05-19
    Description: In this study, we examined to what extent the quality of lanternfish Benthosema pterotum changes during the transportation at the ambient temperature of the southern coast of Iran. For this purpose, trend of pH, total viable count (TVC), total volatile nitrogen (TVN), peroxide value (PV) and moisture changes were determined within the time intervals of 0, 2, 4, 8. 16 and 24 hours after catching the fishes at 23.6° ± 28°c (ambient temperature). After 24 hours the range of changes in these parameters were: pH 6.83 - 7.54, moisture 72.78 - 77.99 %, TVN 20.2 - 263.2 mg/100 gr, PV 0 - 19.97 mg/kg and TVC 49 - 2 x1.012 cfu/g. The results revealed that the lanternfish must be delivered to the fish meal plants within 8 hours. Within this period of time, the quality of lanternfishes as raw material for fish meal production were acceptable. PH, Moisture, TVN, PV, and TVC of the samples after 8 hours were 6.9 - 7.02, 74.18 - 74.68%, 40.06 - 42.04 mg/100 gr, 3.9 - 4.8 mg/kg and 106 - 107 cfu/g respectively. According to these results, the transportation time to fish meal plants at ambient temperature is very limited, and by increasing the transportation time to 8 hours, a good quality meal production from this fish will be impossible. The increase of the ambient temperature will certainly decrease the lanternfish powder's shelf-life.
    Description: Published
    Keywords: Lanternfish ; TVN ; PV ; TVC ; Benthosema pterotum ; Temperature ; Quality ; Fish ; Transportation
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.1-12
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  • 6
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    Preparing sausages from a shark (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Shark ; Sausages ; Preparing ; Fish ; Rijor mortis ; White check shark
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 124pp.
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  • 7
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    The biochemical composition of seaweed from the Persian Gulf and the effect of seaweed extract on the growth and composition of two microalgae Isochrysis galbana and Chaetoceros muelleri cultured as live food for Penaues indicus larvae (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: The biochemical composition of three groups of seaweeds; green (Ulva lactuca and Enthromorpha intestinalis), brown (Sargassum illicifolium and Colpomenia sinuosa) and red (Hypnea valentiea and Gracilaria corticata) from the Persian Gulf and the effects of seaweed extracts (SWE) either as a supplement or as an alternative media to the f/2 medium on the growth and composition of two microalgae Isochrysis galbana and Chaetoceros muelleri cultured as live food for Penaeus indicus larvae were investigated. Results showed that seaweeds were relatively high in carbohydrate and ash, but low in lipid. Lipid content in green seaweed was significantly higher than both the red and brown seaweed (P〈0.05). Protein content of both red and green seaweed was notably higher than brown seaweed (P〈0.05). The red and green seaweed had the highest proportion of saturated fatty acids, while the brown and red seaweed had the highest proportion of monounsaturated and polyunsaturated fatty acids, respectively. The mineral compositions in seaweeds were found in the sequence of K〉Mg〉Fe〉Zn〉Mn〉Cu〉Co. The study clearly showed that the two microalgae I. galbana and C. muelleri could be successfully cultured using the various SWE either as a supplement or as an alternative to the f/2 medium. Since no major changes were found in most of the measured growth parameters, proximate composition, important polyunsaturated fatty acids and mineral content following culture of the microalgae with SWE as an alternative media, it was concluded that the SWE evaluated in the present study are able to provide the necessary nutrients for microalgae growth and could be used as a low cost nutritive media in establishing microalgal populations for use in aquaculture operations. The present study found that when shrimp larvae were fed on microalgae (exclusively or mixed) that had been cultured with SWE as a supplement media, they molted faster to mysis 2 (MII) stage compared to larvae fed on microalgae cultured with conventional f/2 media (Control). Maximum final total length, survival rate and specific growth rate were recorded for shrimp larvae fed on microalgae diets that included SWE as a supplement in the culture media compared to shrimp larvae fed the control diet. The overall growth performance clearly showed that P. indicus larvae were successfully reared using microalgae diets tested, and the shrimp larvae fed on mixed microalgae (I. galbana + C. muelleri) showed better larval growth, survival and development than those that were fed on single microalgal diet. Furthermore, similar larval growth, survival and development were obtained when shrimp larvae were fed with microalgae cultured with SWE as a substitute media to f/2 medium. In conclusion, microalgae cultured with SWE could potentially be used as a low-cost alternative method in producing live food for the hatchery production of shrimp larvae.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Biochemical ; Seaweeds ; Microalgae ; Biochemical composition ; Penaeus indicus ; Enrichment ; Growth ; Isochrysis galbana ; Chaetoceros muelleri ; Larvae ; Lipid ; Fatty acids ; Aquaculture ; Survival rate ; Shrimp
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 88pp.
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  • 8
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    Changes of fatty acid profiles in fillets of Cobia (Rachycentron canadum) during frozen storage (2021)
    In:  http://aquaticcommons.org/id/eprint/22504 | 18721 | 2018-04-14 19:03:56 | 22504 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-06
    Description: In this study changes in fatty acids profile during frozen storage at -18°C of Cobia (Rachycentron canadum), caught from the Persian Gulf (Bandar Abbas) were studied. Changes in saturated fatty acids (SFAs), monounsaturated fatty acids (MUFAs), polyunsaturated fatty acids (PUFAs), EPA+DHA/C16, n-3 PUFA/n-6 PUFA (n-3/n-6) and polyunsaturated fatty acids /saturated fatty acids (PUFA/SFA) were investigated during a six- month storage at -18°C. Eighteen fatty acids were found in Cobia, with higher percentage of saturated fatty acids (46.07%), monounsaturated fatty acids (33.72%) and polyunsaturated fatty acids (15.44%). The MUFAs and PUFAs reduced from 33.72 to 26.26% and 15.44 to 10.78%, respectively. Palmitic acid (C16:0, 27.42% of total fatty acids) and stearic acid (C18:0, 12.62%) were the dominant saturated fatty acids. The major unsaturated fatty acids were determined as docosahexaenoic acid (C22:6n3, 5.76%), oleic acid (C18:1n9, 25.76%) and linoleic acid (C18:2n6, 4.38%). As a result of the frozen storage (up to 6 months), marked content decreases were found in fatty acid groups such as monounsaturated, polyunsaturated and n-3 polyunsaturated, as well as in the n-3/n-6 ratio and it means that the nutritional value of Cobia has decreased.
    Keywords: Biology ; Fisheries ; Cobia ; Fish ; Fatty acids ; Frozen storage ; Armenia
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 204-213
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  • 9
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    Reproductive biology of the white spotted rabbit fish, Siganus sutor, in culture conditions (2021)
    In:  http://aquaticcommons.org/id/eprint/23807 | 18721 | 2018-07-27 15:20:31 | 23807 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-15
    Description: Growth of gonads and spawning time in white spotted rabbit fish, Siganus sutor, in culture conditions were surveyed. Around 800 juveniles weighing 50-80g were captured from wild and stocked at a density of a15 ind/m ^(3) in concrete tanks during years 2004-2005 located in the Persian Gulf &Oman Sea Ecology Research Center. The fishes were cultured for about 12 and 24 mounts to obtain 1 year and 2 year old specimens. Culture was continued till the year 2007. Using 574 records, the length-weight relationship was determined as W=0.0155(FL). Results revealed that Siganus sutor has alometric growth. Monthly changes in GSI showed the lowest GSI values at stage I and V. We observed that GSI values of females and males peaked in April and May. The total fecundity of Siganus sutorranged from 170,000 to 1,300,000 oocytes in specimens of 22-35cm, F.L. 215-800 g B.W. and ovary weight of 15-117g. The average (cSE) total fecundity was 737931.03 ±77503.41 oocytes per female. The relative fecundity ranged from 458.47 oocytes to 2303.80 oocytes per g B.W. with an average (cSE) of 1606.31 ±131.89 oocytes per g B.W. Results showed the best time for S. sutoe to culture is month of May According to the results, one year old males are mature and produce sperm whereas females are ready to reproduce at age 2.
    Keywords: Biology ; rabbit fish ; Siganus sutor ; Fecundity ; Hormozgan province ; Persian Gulf ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 119-128
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  • 10
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    Changes in the quality of lanternfish Benthosema pterotum during transportation at ambient temperatures (2021)
    In:  http://aquaticcommons.org/id/eprint/23917 | 18721 | 2018-08-01 16:43:52 | 23917 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-15
    Description: In this study, we examined to what extent the quality of lanternfish Benthosema pterotum changes during the transportation at the ambient temperature of the southern coast of Iran. For this purpose, trend of pH, total viable count (TVC), total volatile nitrogen (TVN), peroxide value (PV) and moisture changes were determined within the time intervals of 0, 2, 4, 8. 16 and 24 hours after catching the fishes at 23.6° ± 28°c (ambient temperature). After 24 hours the range of changes in these parameters were: pH 6.83 - 7.54, moisture 72.78 - 77.99 %, TVN 20.2 - 263.2 mg/100 gr, PV 0 - 19.97 mg/kg and TVC 49 - 2 x1.012 cfu/g. The results revealed that the lanternfish must be delivered to the fish meal plants within 8 hours. Within this period of time, the quality of lanternfishes as raw material for fish meal production were acceptable. PH, Moisture, TVN, PV, and TVC of the samples after 8 hours were 6.9 - 7.02, 74.18 - 74.68%, 40.06 - 42.04 mg/100 gr, 3.9 - 4.8 mg/kg and 106 - 107 cfu/g respectively. According to these results, the transportation time to fish meal plants at ambient temperature is very limited, and by increasing the transportation time to 8 hours, a good quality meal production from this fish will be impossible. The increase of the ambient temperature will certainly decrease the lanternfish powder's shelf-life.
    Keywords: Chemistry ; Fisheries ; Temperature ; Quality ; Fish ; Transportation ; Lanternfish ; TVN ; PV ; TVC ; Benthosema pterotum ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 1-12
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