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  • 1
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    Quality enhancement in refrigerated tiger tooth croaker (Otolithes ruber) fillets using chitosan coating containing green tea extract (2019)
    Details
    Publication Date: 2021-05-19
    Description: The effects of chitosan (2%) coating combined with green tea extract (GTE) (1%) on the quality of tiger-tooth croaker (Otolithes ruber) fillets including chemical, microbiological, texture, color and sensory properties during 16 days of refrigerated storage was investigated. The color changes were significantly retared, and the texture parameteres and sensory scores were significantly improved in tiger- tooth croaker coated by chitosan, GTE and chitosan combined with GTE, compared with the control. The coincidental lowered rate of increase total volatile base (TVB) content, thiobarbitoric acid (TBA), peroxide value (POV) and free fatty acids (FFA) were obtained in tiger-tooth croaker coated chitosan+GTE. Chitosan in combination with GTE had higher inhibition on microbial growth and yielded the tigertooth croaker with higher likeness, comapared with the other treatments. Therefore, fish coated with chitosan+GTE had the lowest losses in quality during refrigerated storage.
    Description: Published
    Keywords: Tiger-tooth croaker ; Otolithes ruber ; Quality ; Green tea extract ; Chitosan coating
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.224-241
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  • 2
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    Evaluation of antioxidant defense in the various stages of sexual maturation in cultured Sterlet sturgeon (Acipenser ruthenus) (2018)
    Details
    Publication Date: 2021-05-19
    Description: One of the most important defense systems in fish to keep homeostasis is antioxidant defense system. To assay antioxidant enzymes in ovarian maturation process in cultured Sterlet sturgeon Acipenser ruthenus females, 24 fish were identified in four groups: previtellogenic, vitellogenic, post-vitellogenic and atresia (6 in each group) and blood samples were taken. Maturity stages were identified on the basis of histological criteria and direct observation. The activity of catalase (CAT), superoxide dismutase (SOD(, glutathione peroxidase (GPX) and malondialdehyde (MDA) content in blood was investigated. The results showed CAT and GPX activity decreased in the vitellogenic stage in compare to previtellogenic (P 〈0.05), but showed an increase till atresia (P 〈0.05). SOD activity in different stages was not significantly different (P〉 0.05). MDA concentration in different groups did not show significant changes (P〉 0.05). The results of this study showed nevertheless the metabolism increased in the process of sexual maturation, the antioxidant defense is could effectively protect fish against these changes.
    Description: Published
    Keywords: Acipenser ruthenus ; Sterlet sturgeon ; Antioxidant enzymes ; Sturgeon fish ; Blood ; Reproduction ; Lipid peroxidation ; Evaluation ; Sexual ; Maturation
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.131-138
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  • 3
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    Comparison of dietary sodium selenite and selenium nanoparticles on growth performance, liver enzymes and antioxidant status of yellowfin porgy, Acanthopagrus latus (2020)
    Details
    Publication Date: 2021-05-19
    Description: Published
    Keywords: Acanthopagrus latus ; Fish ; Nanoparticles ; Immunity ; Antioxidant ; Selenium
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.57-68
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  • 4
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    Histologic study of ovarian changes during the reproductive cycle of female yellow fin sea bream, Acanthopagrus latus (2021)
    In:  http://aquaticcommons.org/id/eprint/25960 | 18721 | 2018-11-20 12:36:29 | 25960 | Khorramshahr University of Marine Science and Technology
    Details
    Publication Date: 2021-07-24
    Description: This study was done to investigate the macroscopic and microscopic structure of the ovary of Acanthopagrus latus and their changes during sexual maturation cycle from October 2011 to may 2011. 80 A. latus from Mussa Greek (North West of Persian Gulf) were captured and transferred to the laboratory. After biometry, gonads were removed, were weighted and fixed in Bouin's Fluid. Samples were dehydrated, clarified, embedded and sections were prepared. After staining with H&E these slides were studied under light microscopy. Gonadosomatic indices, macroscopic and microscopic changes in the ovary during different months were recorded. The minimum value of GSI were measured in May, (0.31 ± 0.01) while its maximum was seen in March (9.9 ± 3.1). Cyclic changes in ovarian maturity were divided into six stages, including immature, premature, mature, ripe, spawning and resting. A. latus had asynchronous spawning that was occurred from February up to March.
    Keywords: Aquaculture ; Biology ; Iran ; Histologic ; Female ; Yellowfin Seabream ; Acanthopagrus latus ; Ovarian
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 57-65
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  • 5
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    Renal histomorphological responses in adaptation to different environmental salinities in Sparidentex hasta (2021)
    In:  http://aquaticcommons.org/id/eprint/24889 | 18721 | 2018-11-22 07:11:39 | 24889 | Khorramshahr University of Marine Science and Technology
    Details
    Publication Date: 2021-07-16
    Description: Water and electrolyte balance is vital for aquatic organisms in both hyper and hypo osmotic environments. Kidneys as excretory organs play an important role in osmoregulation and body fluid homeostasis. In this study a total number of 180 Sobayti (Teleost: Sparidentex hasta) were exposed to different salinities to assess changes in the kidney structure and alterations in plasma levels of electrolytes, glucose and cortisol. Salinity challenges were examined for a period of 14 days in four experimental groups: 40ppt as control and 5, 20 and 60 ppt as other experimental treatments. 24 hours after salinity challenge, significant changes were observed in the lumen diameter of the primary proximal tubule at the sections from trunk kidney in both 5 and 20 ppt conditions (P〈0.05). Lumen diameter of the second part of the proximal tubule did not differ in any of the experimental salinities (P〉0.05).However, lumen diameter of the distal tubule of nephron in the trunk kidney, increased significantly in 60 ppt treatment 48 hours from starting the experiment (P〈0.05). The thickness of the epithelium tubule in both trunk and tail parts showed no significant differences during the adaptations (P〉0.05). According to the results, histomorphological changes in the different parts of the kidney returned to the basic structure with in 24 to 48hours after exposure to different salinities.
    Keywords: Biology ; Osmoregulation ; Kidney ; Stress ; Sparidentex hasta ; Environmental ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 15-21
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  • 6
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    The effects of dietary oxidized fish oil on the growth and lipid metabolism in hybrid sturgeons (Huso huso ♂×Acipenser ruthenus♀) (2021)
    In:  http://aquaticcommons.org/id/eprint/25001 | 18721 | 2018-11-19 09:52:12 | 25001 | Khorramshahr University of Marine Science and Technology
    Details
    Publication Date: 2021-07-16
    Description: The oxidation of fat in fish diets due to oxygen penetration, high temperature and metal catalysts is common. The effects of feeding diets containing oxidized fish oil on the growth indices and lipid metabolism in young hybrid sturgeons (Huso huso ♂× Acipenser ruthenus♀) was investigated. Three different diets were implemented to three different groups: a control group, Group OFO_50 (50% oil fish oxidized) and Group OFO_100 (100% oil fish oxidized). 90 young sturgeon hybrids with an average initial weight of 212/6 ± 0/7 g, , were randomly divided into 9 fiberglass tanks with a volume of 700 liters after a 2 week adaptation period. Feeding was performed three times a day (8:00, 14:00 and 20:00) according to the specimens’ appetite during the period of the study. After 6 weeks, sampling was done to assay the growth parameters and biochemical indices. In both oxidized oil-fed groups, adverse impact on growth was seen. Also, a significant reduction in cholesterol and triglycerides was observed in the OFO_100 groups. The results showed that feeding hybrid sturgeons with diets containing oxidized fish oil, cause a negative impact on growth and lipid metabolism. Although a slight increase in the percentage of body weight gain and specific growth rate was recorded, it was undesirable and relevant to an increase in visceral fat.
    Keywords: Aquaculture ; Iran ; Oxidized lipid ; Hybrid sturgeon ; Growth ; Fat metabolism ; Blood ; Biochemistry ; Fish oil ; Diet ; Acipenser ruthenus ; Huso huso
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 78-88
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  • 7
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    Quality enhancement in refrigerated tiger tooth croaker (Otolithes ruber) fillets using chitosan coating containing green tea extract (2021)
    In:  http://aquaticcommons.org/id/eprint/26458 | 18721 | 2019-05-06 09:20:00 | 26458 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-24
    Description: The effects of chitosan (2%) coating combined with green tea extract (GTE) (1%) on the quality of tiger-tooth croaker (Otolithes ruber) fillets including chemical, microbiological, texture, color and sensory properties during 16 days of refrigerated storage was investigated. The color changes were significantly retared, and the texture parameteres and sensory scores were significantly improved in tiger- tooth croaker coated by chitosan, GTE and chitosan combined with GTE, compared with the control. The coincidental lowered rate of increase total volatile base (TVB) content, thiobarbitoric acid (TBA), peroxide value (POV) and free fatty acids (FFA) were obtained in tiger-tooth croaker coated chitosan+GTE. Chitosan in combination with GTE had higher inhibition on microbial growth and yielded the tigertooth croaker with higher likeness, compared with the other treatments. Therefore, fish coated with chitosan+GTE had the lowest losses in quality during refrigerated storage.
    Keywords: Biology ; Chemistry ; Fisheries ; Tiger-tooth croaker ; Chitosan coating ; Green tea extract ; Quality ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 224-241
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