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  • 1
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    Chemical, microbial and sensory changes of silver carp (Hypophthalmichthys molitrix) fish treated with black cumin (Nigella sativa L.) extract during storage at refrigerator (2021)
    In:  http://aquaticcommons.org/id/eprint/21938 | 18721 | 2018-01-17 12:40:29 | 21938 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-05
    Description: The changes in chemical, microbial and quality sensory of fillets for silver carp fish treated with black cumin extract during refrigerated storage were investigated. The fish were divided into two groups. First group was dipped in black cumin extract with concentration of 1% and received the highest score in sensory evaluation. Then the fishes were wrapped in polyethylene package. The second group, as the control samples, were wrapped in polyethylene package after dipping in distilled water. All treatments were stored at refrigerator temperature (1±4°C). The microbial tests including total viable count, psychrotrophic count and chemical tests including peroxide index, thiobarbituric acid, free fatty acid value and total volatile basic nitrogen, with sensory evaluation, were done at 4°C over a period of 15 days. The results showed that the black cumin extract delayed lipid oxidation and protein analyses significantly in treated fishes. Psycrotrophic bacteria and total viable count of samples being treated with black cumin extract were maintained lower than the proposed acceptable limit (7 log cfu/g). In comparison to the control samples, microbial spoilage significantly decreased in treated samples. Furthermore, according to sensory analysis, the treatment with black cumin extract led to high quality during storage.The findings indicated that black cumin exerts had strong antioxidant and antibacterial impacts on silver carp fish, such that the shelf life of fillets being treated with black cumin were 2.5 times more than that of control samples during storage in refrigerator.
    Keywords: Biology ; Fisheries ; Silver carp ; black cumin extract ; shelf life ; Hypophthalmichthys molitrix ; fish ; Chemical ; microbial ; sensory ; Nigella sativa L. ; Black cumin ; refrigerator ; fillet ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 71-84
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  • 2
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    Quality assessment of fish burgers from deep flounder (Pseudorhombus elevatus) and brushtooth lizardfish (Saurida undosquamis) during storage at -18ºC (2021)
    In:  http://aquaticcommons.org/id/eprint/22359 | 18721 | 2018-03-27 22:14:11 | 22359 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-04
    Description: Microbiological, chemical and sensory changes of fish burgers prepared from deep flounder (Pseudorhombus elevatus) and brushtooth lizardfish (Saurida undosquamis) were determined during storage at -18ºC for 5 months. Microbiological counts were including total plate count (TPC), total coliform (TC), Staphylococcus aureus, Psychotropic and Escherichia coli decreased throughout the frozen storage . Reduction of microbial load in brushtooth lizardfish was higher than that in deep flounder, except for Staphylococcus aureus counts that was almost equal in both groups. There was a significant increase in pH value in both groups (P〈0.05) in first and second months of storage only. Moisture content increased in both groups at the end of 5th month, with increase of moisture in deep flounder fish burgers being higher than that in brushtooth lizardfish burgers. TVB-N values in both groups increased significantly (P〈0.05 and P〈0.008 for deep flounder and brushtooth lizardfish burgers, respectively) at the end of the second month, however, there was a decrease or no significant change afterward. TBA value of deep flounder fish burgers had a significant decrease (P〈0.05) as storage time continued, however, it increased significantly in brushtooth lizardfish burgers at the end of second month (P〈0.006) following by a decrease at the end of storage period. Peroxide value (PV) in both groups increased significantly (P〈0.05 and P〈0.002 in deep flounder and brushtooth lizardfish burgers, respectively) during storage time but a significant decrease was observed at the end of third and fourth months (P〈0.005 and P〈0.001 in deep flounder and brushtooth lizardfish burgers, respectively). Sensory parameters (color, texture, taste and general acceptability) for two groups decreased significantly (P〈0.003 for all parameters in 2 groups) during storage with deep flounder fish burgers receiving higher scores than brushtooth lizardfish burgers at the beginning and end of the storage period.
    Description: Article includes abstract in Farsi on last page.
    Keywords: Biology ; Chemistry ; Fisheries ; Pseudorhombus elevatus ; Saurida undosquamis ; Fish burger ; Frozen storage ; Quality ; Staphylococcus aureus ; Escherichia coli ; Microbiological ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 111-126
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  • 3
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    Spatiotemporal and estimation of washed out seaweeds biomass in Sistan and Baluchistan coasts (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25525 | 18721 | 2018-10-05 08:33:22 | 25525 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: In order to studing and determination of Seaweed biomass in the Oman Sea coast (Sistan & Baluchestan Province), according to obtained reasults and experiments and observations on seaweed studies in 15 years ego, Beris, Chabahar, Pozm and Tang were high density zones and Jood and Lipar were low density zones in west and east of chabahar respectively that were selected for study stations. Total length of sistan and balochistan coasts from Gwatr area with geografical position 25˚ 10′ N & 61˚ 30′ E to Mydani with geografical position 25˚ 24′ N & 59˚ 5′ E were 354.3 Km. Among this length, 54.6 Km were rocky coast and 299.7 Km were sandy coast. Among this, 18.2 Km were high density zone and 281.5 Km were low density zone. Washout Seaweeds area in intertidial zones determind by measuring and recording of geographic positions by meter and GPS, then were obtained 2 transects determind with equal distance in high density area and 1 transects in low density for monthly sampling. The length of these transects were 100 meter and cross of Each transects were seaweed washed out average. The transects divided to 10 bluck and sampling were done randomly monthly from 5 bluck or 50 persent. The samples were transfered to the lab and the weight of each species was obtained after being cleaned, and separating. The biomass of each species per area unit and in the total area was obtained after determing the average weight of species and also determind geografical position by GPS. In relation to this project were done water sampling for recording of fisical chemistry factors. Total data for analysis recorded in this computer. During this research 9 species were collected. Among these seaweeds, 2 species green algea (composed of 2 families and 2 orders), 6 species brown algae (composed of 3 families and 3 orders) and 1 species red algae were identified. Wet biomass of Sargassum in the total area of Sistan & Baluchestan coasts were 445.9 ton in 2012. Among this biomas, 269.1 ton (%60.35) high density area (Beris 112 ton or %25.11, Pozm 83.7 ton or %18.76, Chabahar 59 ton or %13.22 and Tang 14.5 ton or %3.26) and low density zone 176.8 ton (%39.65). Monthly average were estimated about 74.3 ton (high density zone 44.9 and low density zone 29.5 ton). The maximum biomass was obtained 270.4 ton (high density zone 155.5 and low density zone 114.9 ton) in Azar and minimum biomass was obtained 3.5 ton in Esfand. At last, were suggested, This project were done in persian gulf coasts nessesery.
    Keywords: Biology ; Ecology ; Iran ; Oman Sea ; Sistan and Baluchistan province ; Beris ; Chabahar ; Gwatr ; Seaweed ; Washout ; Biomass ; Density ; Sampling ; Algae ; Green algae ; Brown Algae ; Red algae
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 72
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