scholarly journals Evaluation of Behavioral Changes and Tissue Damages in Common Carp (Cyprinus carpio) after Exposure to the Herbicide Glyphosate

2021 ◽  
Vol 8 (10) ◽  
pp. 218
Author(s):  
Ahmad Mohamadi Yalsuyi ◽  
Mohammad Forouhar Vajargah ◽  
Abdolmajid Hajimoradloo ◽  
Mohsen Mohammadi Galangash ◽  
Marko D. Prokić ◽  
...  
Keyword(s):  
Common Carp ◽  
Cyprinus Carpio ◽  
Environmental Changes ◽  
Environmental Pollutants ◽  
Clinical Signs ◽  
Sublethal Concentration ◽  
Tissue Samples ◽  
Common Carp Cyprinus Carpio ◽  
Swimming Pattern ◽  
Carp Cyprinus Carpio

Pesticides can induce changes in behavior and reduce the survival chance of aquatic organisms. In this study, the toxic effects of glyphosate suspension (Glyphosate Aria 41% SL, Tehran Iran) on behavior and tissues of common carp (Cyprinus carpio) were assessed. For this purpose, a 96 h LC50 of glyphosate suspension (68.788 mL·L−1) was used in the toxicity test. All individuals were divided into control and treatment groups with four replicates. Exposure operations were performed under two conditions: increasing concentration of suspension from 0 to 68.788 mL·L−1; then, decreasing to the first level. The swimming pattern was recorded by digital cameras during the test and tissue samples were collected at the end of the test. There were significant differences between the swimming pattern of treated individuals and control ones during both steps. The sublethal concentration of glyphosate led to hypertrophy, hyperplasia and hyperemia in the gill of fish. However, changes were obvious only after sampling. The exposed fish also displayed clinical signs such as darkening of the skin and increasing movement of the operculum. Moreover, glyphosate suspension affected swimming patterns of fish suggest that the swimming behavior test can indicate the potential toxicity of environmental pollutants and be used as a noninvasive, useful method for managing environmental changes and assessing fish health conditions by video monitoring.

scholarly journals Isolation, molecular identification, and pathological lesions of Saprolegnia spp. isolated from common carp, Cyprinus carpio in floating cages in Mosul, Iraq

2020 ◽  
Vol 13 (12) ◽  
pp. 2759-2764
Author(s):  
Fawwaz Fadhil Ali ◽  
Shahbaa Khalil AL-Taee ◽  
Zahraa Mustafa AL-Jumaa
Keyword(s):  
Common Carp ◽  
Cyprinus Carpio ◽  
Clinical Signs ◽  
Inflammatory Cells ◽  
Infected Fish ◽  
Universal Primers ◽  
Tissue Samples ◽  
Common Carp Cyprinus Carpio ◽  
Carp Cyprinus Carpio ◽  
Gill Filaments

Background and Aim: Saprolegniasis is a fungal disease that infects freshwater fish. The condition is characterized by a cotton-like appearance in the gills and body. This study aimed to isolate Saprolegnia from common carp, Cyprinus carpio, raised in a floating cage in Wana district, Mosul, Iraq. Materials and Methods: Samples were collected from 15 infected fish and examined microbiologically, molecularly, and histopathologically. Saprolegnia DNA was extracted which was amplified using universal primers give a 540 bp DNA fragment, and gill and muscle tissue were also examined for histopathological changes. Results: Isolated colonies of Saprolegnia were characterized by a circular, white cottony appearance with long hair. Lactophenol staining demonstrated hyphae as branched non-septate, transparent masses. The genomic DNA of isolates was consistent with Saprolegnia spp. The infected tissue samples showed variable pathology in gills. Severe hemorrhage and edema were observed in primary gill filaments with hyperplasia in epithelial cells and infusion in secondary gill filaments. Hyphae of Saprolegnia were seen between necrotic and edematous myofiber with inflammatory cells infiltration. Conclusion: Saprolegnia can cause economic impacts through lethal infection of fish. Clinical signs of Saprolegnia infection were confirmed molecularly and microscopically, and these findings were supported by histopathological lesions in gill and muscle tissues.

scholarly journals HISTOPATHOLOGICAL CHANGES (GILLS AND LIVER) AND CLINICAL SIGNS OF COMMON CARP, CYPRINUS CARPIO L. EXPOSED TO GRAPHENE NANOPARTICLES

2019 ◽  
Vol 50 (3) ◽  
Author(s):  
Al-Rudainy & Khalel
Keyword(s):  
Common Carp ◽  
Cyprinus Carpio ◽  
Clinical Signs ◽  
Abnormal Behavior ◽  
Average Weight ◽  
Histopathological Changes ◽  
Common Carp Cyprinus Carpio ◽  
Secondary Lamellae ◽  
Carp Cyprinus Carpio ◽  
Graphene Nanoparticles

This study was conducted to investigate the effect of graphene nanoparticles on histopathological changes and clinical signs of common carp Cyprinus carpio. A total of 48 fish were used in the experiment with an average weight 68.44 g. Fish were exposed to graphene nanoparticles at concentrations of 10 and 20 mg / L for the T1 and T2 respectively, as well as to  control group (without graphene nanoparticles).  Fish exposed to graphene showed no abnormal behavior and no mortality satisfactory clinical signs in the experimental fish. Histopathological changes of gills showed fusion with shorting of the secondary lamellae, lifting up secondary lamellae beside necrosis and hyperplasia of the epithelial cells of secondary lamellae in gills. On the other hand, there was necrosis of hepatocytes, dilation of sinusoids, hydrobic degeneration, hepatocellular vacuolation, hypertrophy and hydrobic of degeneration  in liver. The present study was suggested to investigate of the graphene nanoparticles effects on histopathological changes and clinical signs to clarify a clear representation about on fish and its danger of its accumulation in aquatic environment.

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