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  • Biology  (8)
  • Fish Culture  (4)
  • 1
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    Effects of letrozole, non-steroidal aromatase inhibitor, on serum sex steroid levels, oocyte diameter and gonadosomatic index (GSI) in rainbow trout (Oncorhynchus mykiss) (2018)
    Details
    Publication Date: 2021-05-19
    Description: The objective of this study was to contribute to investigate the efficacy of letrozole, a potent non-steroidal aromatase inhibitor, on serum sex steroid levels and oocyte growth in rainbow trout females. Serum steroid levels were measured using an indirect enzyme-linked immunosorbent assay (ELISA) before and 22 days after an initial injection with 1, 2.5 mg kg-1 and subsequent weekly injection with 2.5 mg kg-1letrozole. After the last blood collection, gonad tissues were removed and oocyte diameter and GSI were determined. In all groups treated with letrozole, serum 17β- esteradiol levels (E2) decreased significantly and inversely serum 17α-20ß dihydroxy-4 pregnen- 3- one (17α-20ß-P), testosterone(T) levels increased significantly from 6 to 96 h after injection (p〈0.05). The lowest E2 levels, oocyte diameter and GSI were measured in the group treated weekly with 2.5 mg kg-1 letrozole (p〈0.05). This study demonstrates that letrozole has the potential to interfere in the synthesis of endogenous estrogens from androgens and delay gonadal development.
    Description: Published
    Keywords: Biology ; Physiology ; Rainbow trout ; Aromatase inhibitor ; Sex steroid ; GSI ; Oncorhynchus mykiss ; Sex ; Gonadosomatic ; Gonadosomatic index
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.289-301
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  • 2
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    Gingival neoplasm presenting as an ossifying epulis in a parrot cichlid fish (Hoplarchus psittacus) (2018)
    Details
    Publication Date: 2021-05-19
    Description: This report describes the histopathological features of an ossifying epulis, measuring 1.5 × 1 × 1 cm in length, width and height, respectively, on the lingual surface of the lower jaw of a 2.5 year-old parrot cichlid (Hoplarchus psittacus) from a commercial aquarium. The tumor had appeared in the oral cavity three months prior to its introduction to the laboratory for diagnosis. Grossly, the neoplastic mass was pale-tan with a shiny, smooth surface and coalescing areas of hemorrhage. Microscopically, the overlying epithelium was hyperplastic and extended deeply into the underlying stroma. The stroma consisted of well vascularized collagenous tissue and neoplastic fibroblasts associated with irregular cords and islands of mineral deposition as dentin-like materials confirmed by Masson's trichrome and Goldner's trichrome staining.
    Description: Published
    Keywords: Biology ; Physiology ; Hoplarchus psittacus ; Epulis ; Oral tumor ; Parrot cichlid ; Histopathology ; Radiography
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.112-118
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  • 3
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    Co-invasion of anchor worms Lernaea cyprinacea (Copepoda: Lernaeidae) in some freshwater fishes of the Kor River Basin, southwest of Iran with some remarks on the ecological aspects of lernaeosis in the country (2021)
    In:  http://aquaticcommons.org/id/eprint/22873 | 18721 | 2018-05-31 18:01:31 | 22873 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-11
    Description: In the present investigation, co-invasion of Lernaea parasite is reported in some fish species, collected from the Kor River Basin (Dorudzan Reservoir and Kor River), Southwest of Iran in 2010 and 2011. Lernaea cyprinacea parasites were isolated from the external surface of eye, lips, gills, nostrils, fins, operculum and body of Alburnus mossulensis, Capoeta aculeata, Capoeta saadii (all native cyprinids), Cyprinus carpio and Carassius auratus (exotic cyprinids). The highest infestation was found in endemic fish, C. aculeata with 61 ectoparasites in a single specimen of 348 mm TL. The greatest prevalence was found in C. auratus (100%) followed by C. saadii (80%), C. aculeata (69.4%), C. carpio (30.1%) and A. mossulensis (27.3%). Lernaea parasites may have been translocated into Dorudzan Dam by exotic species (e.g., C. carpio and C. auratus) through the four processes of introduction (transport in alien host and acting as co-introduced species), establishment (survival and reproduction in alien host, acting as co-introduced species), spreading with its original host (dispersal) and switching to a native host species to become a co-invader.
    Keywords: Biology ; Ecology ; Lernaea cyprinacea ; Alien parasite ; Invasive species ; Ichthyodiversity ; Kor River Basin ; Dorudzan Reservoir ; fish disease ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 369-389
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  • 4
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    An investigation on the sustained releasing delivery of GnRHa using Freund's incomplete adjuvant in rainbow trout (Oncorhynchus mykiss) (2021)
    In:  http://aquaticcommons.org/id/eprint/23653 | 18721 | 2018-07-15 00:15:01 | 23653 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-14
    Description: In this study, Freund's incomplete adjuvant (FIA) was used for emulsifying and sustained releasing of gonadotropin releasing hormone agonist (GnRHa) in Rainbow trout (Oncorhynchus mykiss). The hormone [D-Ala6, des GlylO] m GnRHa was diluted in 0.25ml physiological saline and mixed with equal volume of FIA (GnRHa-FIA). A group of Rainbow trout broodstock were injected with GnRHa-FIA and compared with those receiving the treatment in two steps or one acute GnRHa injection. All of the fish that received GnRHa in emulsified form or in two steps injection ovulated in 10 and 11 days after injection respectively. In contrast, only 75% of the control fish and 60% of the fish with an acute injection ovulated up to 36 days after injection.
    Keywords: Aquaculture ; Ovulation ; Fish physiology ; Endocrinology ; Fish Culture ; Sex hormones ; Freshwater ; Induced breeding ; Oncorhynchus mykiss ; ISW ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 145-152
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  • 5
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    Efficacy of conventional disinfectants on isolated Streptococcus iniae from diseased rainbow trout in laboratory and culture tank conditions (2021)
    In:  http://aquaticcommons.org/id/eprint/23659 | 18721 | 2018-07-15 07:53:45 | 23659 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-14
    Description: The efficacy of different disinfectants (formalin, acetic acid, citric acid, chlorhexidine, sodium iodide, potassium permanganate, sodium hypochlorite and cetrimide-c) was examined on Streptococcus iniae, isolated from diseased fish of Fars province over the years 2002-2004. In laboratory condition, minimum bactericidal concentration of disinfectants after 15, 30, 45 and 60 minutes were evaluated. Disinfectants were also tested under natural conditions with addition of a known concentration of bacterial suspension into water. An effective concentration of each disinfectant that had been determined in the first part of this study was added to the culture tanks and water samples were collected after 15, 30, 45 and 60 minutes to evaluate streptococcus isolation. A 3-5ppm concentration of chlorhexidine and sodium hypochlorite were powerful disinfectants against S. iniae. Acetic acid and citric acid were efficient in a concentration ranging between 350-500ppm showing very weak disinfectant activity against S. iniae. Results of tank tests showed that a bio-film is formed in the tanks may have significant effect on lowering the efficiency of disinfectants, thus most disinfectants were only effective at a higher concentration. Generally, sodium iodide and sodium hypochlorite were more efficient against S. iniae in tank condition than other disinfectants.
    Keywords: Fisheries ; Health ; Disinfectants ; Disease control ; Fish Culture ; Freshwater ; Culture tanks ; Controlled conditions ; Streptococcus iniae ; Oncorhynchus mykiss ; Fars Province ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 29-38
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  • 6
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    Short communication: Infection of Aphanius dispar (Holly, 1929) with Ligula intestinalis plerocercoids in Mehran River, Hormuzgan province, south of Iran (2021)
    In:  http://aquaticcommons.org/id/eprint/22448 | 18721 | 2018-04-09 20:21:50 | 22448 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-05
    Description: Aphanius dispar (Holly, 1929) (known as Mahi gour-e khari, mahi dom parchami, kopurdandandar-e balehbolband) is an euryhaline tooth-carp fish which apparently prefers brackish waters of coastal areas of Iran. It is also distributed in Cyprus, Iraq, Somalia, Israel, Saudi Arabia, Syria and Djibouti. Aphanius dispar occurs in shallow water and among vegetation over sand, rock or soft detritus bottoms. Ligula intestinalis (L., 1758) is a pseudophyllidean cestode which in its plerocercoid stage infects a range of freshwater fish species, particularly members of the cyprinidae, as its second intermediate host and it has a widespread distribution throughout the northern hemisphere. However, no report is available on the occurrence of L. intestinalis from tooth-carp fish found in southern Iran. Recently, the present authors studied the infection of A. persicus in Barme-e-Shoor Spring-Stream System, Maharlu Basin, Shiraz, Iran. The present study was undertaken to investigate the possibility of A. dispar acting as an intermediate host for Ligula intestinalis from Mehran river in Mehran basin, near Bastak city, Hormuzgan Province, south of Iran.
    Keywords: Biology ; Ecology ; Aphanius dispar ; Ligula intestinalis ; Plerocercoid ; Mehran River ; Hormuzgan province ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 346-351
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  • 7
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    Serum antibody against Vibrio anguillarum in cultured rainbow trout (Oncorhynchus mykiss) (2021)
    In:  http://aquaticcommons.org/id/eprint/23930 | 18721 | 2018-08-01 17:50:39 | 23930 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-15
    Description: In order to determine the concentration of the antibodies against the pathogenic Vibrio anguillarum, three hundred blood samples were taken from 9-12 month old cultured rainbow trout (Oncorhynchus mykiss) in 4 farms in the north and west region of Fars Province, which had been exposed to this bacteria. An indirect ELISA was employed to examine the serum. Using soluble antigen (SA) indicated that 54% of the examined blood samples contained antibodies against Vibrio anguillarum, while by using whole cell antigen (WCB) only 53% of samples were found to be seriopositive. The highest seriopositivity rate (83%) was observed in farm #2, where clinical signs of vibriosis also occurred. This study revealed that Rainbow trouts fed on raw marine fish meal powder are more exposed to V. anguillarum. Vibriosis in cultured Rainbow trout in Iranian inland freshwater farms is also discussed in this paper.
    Keywords: Biology ; Health ; Serum ; Blood ; Bacteria ; Freshwater ; Rainbow trout ; Oncorhynchus mykiss ; Vibrio anguillarum ; Antibody ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 47-58
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  • 8
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    Gingival neoplasm presenting as an ossifying epulis in a parrot cichlid fish (Hoplarchus psittacus) (2021)
    In:  http://aquaticcommons.org/id/eprint/22673 | 18721 | 2018-05-14 22:22:53 | 22673 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-08
    Description: This report describes the histopathological features of an ossifying epulis, measuring 1.5 × 1 × 1 cm in length, width and height, respectively, on the lingual surface of the lower jaw of a 2.5 year-old parrot cichlid (Hoplarchus psittacus) from a commercial aquarium. The tumor had appeared in the oral cavity three months prior to its introduction to the laboratory for diagnosis. Grossly, the neoplastic mass was pale-tan with a shiny, smooth surface and coalescing areas of hemorrhage. Microscopically, the overlying epithelium was hyperplastic and extended deeply into the underlying stroma. The stroma consisted of well vascularized collagenous tissue and neoplastic fibroblasts associated with irregular cords and islands of mineral deposition as dentin-like materials confirmed by Masson's trichrome and Goldner's trichrome staining.
    Keywords: Biology ; Epulis ; Oral tumor ; Parrot cichlid ; Histopathology ; Radiography ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 112-118
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  • 9
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    Effects of letrozole, non-steroidal aromatase inhibitor, on serum sex steroid levels, oocyte diameter and gonadosomatic index (GSI) in rainbow trout (Oncorhynchus mykiss) (2021)
    In:  http://aquaticcommons.org/id/eprint/22774 | 18721 | 2018-05-21 20:02:48 | 22774 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-10
    Description: The objective of this study was to contribute to investigate the efficacy of letrozole, a potent non-steroidal aromatase inhibitor, on serum sex steroid levels and oocyte growth in rainbow trout females. Serum steroid levels were measured using an indirect enzyme-linked immunosorbent assay (ELISA) before and 22 days after an initial injection with 1, 2.5 mg kg^-1 and subsequent weekly injection with 2.5 mg kg^-1 letrozole. After the last blood collection, gonad tissues were removed and oocyte diameter and GSI were determined. In all groups treated with letrozole, serum 17β-esteradiol levels (E2) decreased significantly and inversely serum 17α-20ß dihydroxy-4 pregnen-3-one (17α-20ß-P), testosterone (T) levels increased significantly from 6 to 96 h after injection (p〈0.05). The lowest E2 levels, oocyte diameter and GSI were measured in the group treated weekly with 2.5 mg kg^-1 letrozole (p〈0.05). This study demonstrates that letrozole has the potential to interfere in the synthesis of endogenous estrogens from androgens and delay gonadal development.
    Keywords: Aquaculture ; Biology ; Fisheries ; Aromatase inhibitor ; Sex steroid ; GSI ; Oncorhynchus mykiss ; Biology ; Physiology ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 289-301
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  • 10
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    Phagocytic changes in common carp (Cyprinus carpio) following administration of immunostimulants Quil-A and levamisole (2021)
    In:  http://aquaticcommons.org/id/eprint/24132 | 18721 | 2018-08-03 08:13:24 | 24132 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-15
    Description: In this research Quil-A and levamisole as immunostimulants were used both by immersion route (Quil-A, 40 mg/L and levamisole, 50 mg/L) and oral route (Quil-A 5, 10 mg and levamisole 20, 40mg) in common carp (Cyprinus carpio)(mean weight 80g) daily for 20 days. After twenty days of treatment with immunostimulants, stained heat killed Candida albicans and Bacillus cereus were injected intravenously via caudal vein. Two hours after injection, blood and kidney tissue samples were collected. Phagocytosis rate of blood and kidney smears were studied using Gimsa staining. Results showed that phagocytosis of Candida albicans cells by blood leukocytes in immersion groups into 40mg/L and 50 mg/L levamisole and orally used 5 and 10 mg Quil-A groups were significantly increased in comparison with the control group. While fish given 20 mg levamisole orally did not show a significant difference with control group and phagocytosis in 40mg levamisole by oral administration was suppressed as showed significant difference with control and other groups. Phagocytosis of Bacillus cereus cells showed similar results to the Candida albicans cells. Phagocytosis rate in kidney tissue was also stimulated in all groups except for 20 and 40mg levamisole groups presumably due to immunosuppressive effect of high levamisole rate.
    Keywords: Biology ; Immunostimulants ; Quil-A ; Levamisole ; Phagocytic ; Common carp ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 1-12
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