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  • 1
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    In:  http://aquaticcommons.org/id/eprint/23630 | 18721 | 2018-07-13 10:08:57 | 23630 | Iranian Fisheries Science Research Institute
    Publication Date: 2021-07-14
    Description: To prepare common carp surimi, washing was done in different steps (1, 2 and 3 steps) and times (5, 10 and 15 minutes) and the treatments were tested statistically. The results showed that the 10 minutes washing for 3 times produced surimi that was superior to minced meat in color desirability (1 for surimi versus 7 for minced meat), odor desirability (2 versus 7), flavor desirability (0 versus 5.5) and on the general properties. The process of surimi production also increased water binding capacity from 0.14 to 0.64, pH from 6.21 to 7.34 and gel forming ability from A score to AA score. Tests of moisture content, protein, fat, ash, and total volatile nitrogenous bases (TVB-N) were performed on the samples of the minced meat and the selected treatment of the produced surimi. The extent of changes of these parameters were calculated and compared with available standards. We found that the common carp surimi lacks undesirable flavor and smell of fish and has suitable rheological properties for preparation of different kinds of fish paste products.
    Keywords: Fisheries ; Quality ; Fats ; Proteins ; Nitrogen compounds ; Ashes ; Freshwater ; Common carp ; Minced products ; Processed fishery products ; Cyprinus carpio ; Golestan Province ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 81-92
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  • 2
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    In:  http://aquaticcommons.org/id/eprint/23650 | 18721 | 2018-07-15 00:08:50 | 23650 | Iranian Fisheries Science Research Institute
    Publication Date: 2021-07-14
    Description: To understand the change in fish consumption behavior of Tehran citizens (Iran), in the year 2005, an investigation was conducted using questionnaire. Using independent random method, 316 families covering all 22 districts of Tehran were selected. The results were combined with that acquired in the year 2001 to develop marketing programs. We used Fridman, K2 tests for nonparametric statistics and Z (normal distribution) and Phi Cramer index for analysis. The results showed that the quality and freshness of the products and the hygienic state of the distributing places had the highest effects on purchase. Also, the price and packaging had the same priority as in the year 2001. No significant relationship was found between income level of the families and their fish consuming tendency. Comparing the two years of study, we found that 16.6% more people preferred packed food in the year 2005 while per capita consumption had increased from 2.8 to 3.46kg. With the information on production date and health license already available on the products, the consumers demanded dietary contents. Considering the increase in marine fishery products, the families tended to consume more of the farmed aquatics with the live selling of rainbow trout being preferred the most. The behavior of consumers and their decisions to purchase fishery products in this period depended on production directions and economic development strategies which indicated positive aquaculture development programs in the country. We recommend continuing current policies regarding marketing factors. The results also showed that uncertainly about freshness and health of the products is the main reason for purchase from the representative fishery stores. The results shows more research and advertisement can improve awareness about packing advantages and its role in decreasing wastes and creating more added values.
    Keywords: Fisheries ; Sociology ; Marine fisheries ; Diets ; Fish consumption ; Marketing ; Aquaculture products ; Fisheries ; Marine ; Aquaculture ; Feeding experiments ; Economics ; Food ; Aquaculture development ; Oncorhynchus mykiss ; Brackish ; Tehran ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 117-126
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  • 3
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    In:  http://aquaticcommons.org/id/eprint/26095 | 18721 | 2018-11-17 18:35:14 | 26095 | Khorramshahr University of Marine Science and Technology
    Publication Date: 2021-07-24
    Description: The properties of kiddi shrimp (Parapenaeopsis stylifera) gel added with different levels of microbial transglutaminase (MTGase) (0.6, 1, 1.4 and 1.8 units/g) were studied. Most textural parameters of the gels improved by adding MTGase espacially at higher levels (1.8 and 1.4).The expressible moisture and trichloroacetic acid content declined with the increase in MTGase content. MTGase espacially at higher levels was effective in the color of the gels so that it increased L* and decreased a*andb* value. SDS-PAGE study revealed that myosin heavy chain underwent polymerization to a higher extent in the presence of MTGase. Microstructure of gels added with 1.8 units of MTGase had more ordered fibrillar structure compared with those of gels without MTGase. Therefore it could be concluded that at MTGase play an important role in improving the gel properties of kiddi shrimp mince.
    Keywords: Agriculture ; Iran ; Microbial transglutaminase ; Gel ; Kiddi shrimp ; Mince
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 11-20
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  • 4
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    In:  http://aquaticcommons.org/id/eprint/22460 | 18721 | 2018-04-10 20:26:35 | 22460 | Iranian Fisheries Science Research Institute
    Publication Date: 2021-07-05
    Description: Status of fish consumption was analyzed by completing the 295 questionnaires in all 22 metropolitan regions of Tehran from different households in 2008. After reviewing the descriptive and statistics analysis along with the non-parametric statistics, the fish consumption per capita was extracted through formulas. The average and mode of purchasing of each household occurs 11 times per year with 5.1 Kg in each time . Considering the higher fish consumption growth rate in Iran, the sequence of interest in all kinds of protein is as follows: poultry, mutton, beef, Trout, wild fishes and Chinese carps. The highest interest of households to buy fish more than other protein resources is due to the nutrient value of it. An average of 33.2% purchasing is dedicated to the farmed fish. 59% of purchasers are interested to buy packed up fish products and pay attention to the label of nutrient values on the product package. Fish consumption per capita is 13.3 Kg, which is divided to 6.4 kg for farmed fishes, 5.8 Kg for wild fishes and 1.1 Kg for canned fish. The higher consumption per capita of Tehran citizens in comparison with other people from other cities, who are living in Tehran, is because of their tendency and freshness of farmed fishes. In contrast, the consumption of canned and wild fishes among people of littoral regions who live in Tehran is higher than others.
    Description: Article includes abstract in Farsi on last page.
    Keywords: Aquaculture ; Fisheries ; Fish consumption per capita ; Fisheries ; Tehran ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 546-556
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  • 5
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    In:  http://aquaticcommons.org/id/eprint/22325 | 18721 | 2018-03-21 03:21:16 | 22325 | Iranian Fisheries Science Research Institute
    Publication Date: 2021-07-03
    Description: The effect of aqueous solution of citric acid (CA) on the lipid stability of the European catfish (Silurus glanis) fillets during frozen storage (up to 6 months) was investigated. Rancidity development was measured by several biochemical indices (free fatty acids, peroxides and TBA) and complemented by the measurement of expressible moisture and sensory evaluation (flesh odor, consistency and flesh appearance). The CA treatment led to some lower free fatty acids (6.43% oleic acid in total lipid at month 6), peroxides (7.98meq oxygen/kg lipids, at month 6) and secondary compounds formation (2.16mg malondialdehyde/kg fish sample). Lower peroxide, thiobarbituric acid-reactive substance (TBA), free fatty acids (during 0,3 and 6 months frozen storage), and expressible moisture (month 6) values were obtained from CA-treated fish fillets than the untreated (blank control) ones (P〈0.05).
    Keywords: Biology ; Chemistry ; Fisheries ; Catfish ; Lipid oxidation ; Citric acid ; Shelf life ; Silurus glanis ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 215-228
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  • 6
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    In:  http://aquaticcommons.org/id/eprint/22360 | 18721 | 2018-03-27 22:34:32 | 22360 | Iranian Fisheries Science Research Institute
    Publication Date: 2021-07-04
    Description: Neogobius caspius is an endemic species of the Caspian Sea which plays an important role in food chain as a predatory fish. The main aim of this study was to investigate selected feeding characteristics of Neogobius caspius in the south west coasts of the Caspian Sea. Monthly sampling was carried out using a bottom trawler at three stations (Astara, Anzali and Chabuksar) in three depths (0-5, 5-10 and 10-15m) on a monthly basis from October 2004 to September 2005. Relative gut length (RLG) was less than one suggesting that this species is carnivorous. RLG was significantly lower in older fish but gut length was longer (P〈0.05). Intensity of fullness was below the favorite degree (IF〈400) from October to March, however, it was higher (400〈IF〈900) from April to October at all stations, indicating that feeding conditions for this species is suitable in the study area. Study showed that N. caspius mainly fed on molluscs (Food preference, FP=100%), worms (FP=89%) and crustaceans (FP=74%), hence, this species is considered as euryphagus species.
    Description: Article includes abstract in Farsi on last page.
    Keywords: Biology ; Ecology ; Fisheries ; Neogobius caspius ; Feeding characteristics ; Relative gut length ; Food preference ; Caspian Sea ; Gilan Province ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 127-140
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  • 7
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    In:  http://aquaticcommons.org/id/eprint/22866 | 18721 | 2018-05-30 22:33:37 | 22866 | Iranian Fisheries Science Research Institute
    Publication Date: 2021-07-11
    Description: The shelf-life of conventional surimi and isolated proteins that modified by acidic pH (2.5) and by using alkali pH (11) from silver carp (Hypophthalmichthys molitrix) was studied during months of storage at -18±2 °C. For conventional surimi, three washing steps were used. In the third stage of washing, 0.2% NaCl was used to withdraw more water. The result showed that isolated protein by alkaline pH has a higher efficiency. In the obtained result of percent yield and the recovery of protein product, isolated proteins showed higher values than conventional surimi. Isolated protein by using acid-aided processes had lower lightness and whiteness score, compared with alkaline-aided process and surimi prepared by a conventional washing method during frozen storage. The concentration of myosin heavy chain and actin were varied with solubilizing pH. Also, the lowest downfall of protein and the best surimi quality were found in produced samples with alkaline-acid aided process.
    Keywords: Chemistry ; Fisheries ; Silver carp ; Conventional surimi ; Acid-alkaline solubilization ; Shelf-life ; Frozen storage ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 281-300
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  • 8
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    In:  http://aquaticcommons.org/id/eprint/23874 | 18721 | 2018-08-01 06:21:42 | 23874 | Iranian Fisheries Science Research Institute
    Publication Date: 2021-07-15
    Description: Using reference books, monitoring buyers behavior and interviewing the experts, the effective parameters on home consumption behavior of farmed fish were identified and compiled as a questionnaire. After the reliability and viability evaluation the questionnaire was filled randomly in the spring of 2008 for 295 households of different localities in Tehran. The allocation of questionnaires was conducted based on the proportion of population in each locality. The degree of importance of effective parameters and their priority were calculated by Friedman test. The results showed that, quality, taste, smell and protein content of grocery basket are the most important purchasing factors among Tehrani households. However, those who use only farmed fish or those who do not use fish at all, after quality, smell has the highest importance, and in the fourth priority, instead of protein content of grocery basket, fish bone has higher effect. We suggest that to improve consumption of farmed fish, apart from quality, the strategies of deodorizing, taste improvement and decreasing fish bones, shall be taken into consideration during harvest, transport and fish processing.
    Keywords: Environment ; Fisheries ; Management ; Marketing ; Fish ; Household ; Quality ; Tehran ; Tehran Province ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 87-96
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  • 9
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    In:  http://aquaticcommons.org/id/eprint/23880 | 18721 | 2018-08-01 07:06:29 | 23880 | Iranian Fisheries Science Research Institute
    Publication Date: 2021-07-15
    Description: To determine the genetic diversity of Rutilus frisii kutum, 25 samples were collected from Gharesou and Gorgan-rud rivers in April 2008. The genomic DNA was extracted from the caudal fin using phenol- chloroform method and investigated with 10 microsatellite loci. All the 10 investigated loci were polymorphic and showed variability in the two populations of the rivers. The mean number of allele per locus at population level and the observed heterozygosity ranged from 4 to 13 and 0.22 to 1.00, respectively. The FST value between populations was 0.014 (P〈0.05), and the analysis of genetic variation distribution indicated a very high within population variation (99%) while among population variation is low (1%). Highly significant deviation from hardy-Weinberg equilibrium was observed in both populations which can be attributed either to the presence of null alleles or to the genetic bottleneck. The results indicated a high level of genetic variation in this species and we concluded that there is more than one population of Rutilus frisii kutum in Golestan coastal waters.
    Keywords: Biology ; Rutilus frisii kutum ; microsatellite ; Genetic bottleneck ; Caspian Sea ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 151-156
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  • 10
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    In:  http://aquaticcommons.org/id/eprint/21819 | 18721 | 2018-01-10 17:04:44 | 21819 | Iranian Fisheries Science Research Institute
    Publication Date: 2021-07-02
    Description: Cultured fish are presented in various sizes and prices in market. The present study aimed to investigate the proportion of nutritional value and price of various weight groups of bighead (Hypophthalmichthys nobilis) and to offer two indices for comparing nutritional value in proportion with fish prices. For this purpose, bighead specimens were prepared in market sizes and their dry matter, lipid, protein and ash content and fillet yield were determined. Then, the proportion of nutritional and financial value (NP) and justified price difference based on dry matter content (PDdm) were calculated for each weight group. The results showed that the light weight group has a higher NP index for dry matter, protein, ash and energy than medium and heavy weight group. The NP index was the same between medium and heavy groups. While the price difference between light weight and two other weight groups is more than calculated PDdm index, the light weight group is a proper choice for purchase.
    Keywords: Aquaculture ; Biology ; Fish breeding ; Productivity ; NP index ; PDdm index ; Hypophthalmichthys nobilis ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 43-51
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