Isolation of pathogenic fungi from the major cultivated coldwater fish species and their environment in the kumaon region of Uttrakhand

2016 ◽  
Author(s):  
Avdhesh Kumar ◽  
Raghvendra Singh ◽  
N. N. Pandey
Keyword(s):  
Fish Species ◽  
Cold Water ◽  
Pathogenic Fungus ◽  
Infection Intensity ◽  
Pathogenic Fungi ◽  
Fish Ponds ◽  
Hemp Seed ◽  
Running Water ◽  
Water Fish

An attempt has been made to isolate the pathogenic fungus from water, body tissue of cold water fish. The hemp seed culture was applied to obtain the fungal colonies and bacteria free pure isolate was obtained by repeated subcultures, using SDA (Sabouraud Dextrose Agar) under aseptic condition and allowed to incubate at 18-200C for 48 hours. Fungal infection was more prominent in the ponds of stagnant water than the running water raceways. The inferior water quality of the stagnant fish ponds supports the virulence of the fungus spores. The muscles of the rainbow trout, fins and gills of the carp were susceptible for the infection. Intensity of the infection in cold water fish species increases with the downfall of the water temperature. The pathogenic fungi in the present study was identified as Saprolegnia parasitica, Saprolegnia diclina and S. ferax with cotton like appearance, elongated zoosporangia and pear shaped primary sporangium.

scholarly journals Water quality and fish diversity in Korotoa River of Bogura, Bangladesh

2020 ◽  
Vol 32 (1) ◽  
pp. 60-72
Author(s):  
SAMINA AHATUN ◽  
MD. SIRAJUL ISLAM ◽  
MD. HUMAYUN KABIR ◽  
MAUSUMI REHNUMA ◽  
MD. ENAMUL HOQ
Keyword(s):  
Water Quality ◽  
River Water ◽  
Fish Species ◽  
Physicochemical Parameters ◽  
Industrial Effluent ◽  
Domestic Sewage ◽  
Fish Diversity ◽  
Quality Degradation ◽  
Water Fish

The study was conducted to explore the physicochemical parameters of water, fish diversity andfisheries resources of Korotoa River at Bogura city of Bangladesh during July 2015 to February 2016. Thewater samples were collected from five sampling stations in the Korotoa River during wet and dry seasons.The results of the study showed that temperature, EC, TDS, DO, BOD, alkalinity, acidity and total hardnessof the Karotoa River water were 25.86ºC, 297.41 ?S/cm, 98.86 mg/L, 2.17 mg/L, 2.64 mg/L, 122.05mg/L, 3.28 mg/L and 75.59 mg/L, respectively. The DO and BOD contents of the river water were foundunsuitable for fisheries when compared with the standard of DoE. A total of ten fish species under six ordersand seven families were identified during the study period. The study also revealed that the most remarkablecause of water quality degradation of the river was waste dumping (58%) followed by urbanization and riverbank erosion. The water quality degradation (46%) negatively influenced the abundance of fish species. Theresults concluded that the water quality of the river is not favorable for production of fishes and other aquaticorganisms. The study suggested that the source of water quality degradation should be closely monitoredtogether with the industrial effluent and/or domestic sewage discharge should be reduced or stopped throughthe initiatives of the local government concerned to maintain sound and healthy ecosystem of the river.

scholarly journals Decline of cold-water fish species in the Bay of Somme (English Channel, France) in response to ocean warming

2017 ◽  
Vol 189 ◽  
pp. 189-202 ◽  
Author(s):  
Arnaud Auber ◽  
Francis Gohin ◽  
Nicolas Goascoz ◽  
Ivan Schlaich
Keyword(s):  
Fish Species ◽  
Cold Water ◽  
Ocean Warming ◽  
English Channel ◽  
Water Fish

Exposure histories derived from selenium in otoliths of three cold-water fish species captured downstream from coal mining activity

2011 ◽  
Vol 105 (3-4) ◽  
pp. 492-496 ◽  
Author(s):  
Lisa A. Friedrich ◽  
Patricia L. Orr ◽  
Norman M. Halden ◽  
Panseok Yang ◽  
Vince P. Palace
Keyword(s):  
Coal Mining ◽  
Fish Species ◽  
Cold Water ◽  
Mining Activity ◽  
Water Fish

scholarly journals Intraspecies Interaction of Fusarium graminearum Contributes to Reduced Toxin Production and Virulence

2015 ◽  
Vol 28 (11) ◽  
pp. 1256-1267 ◽  
Author(s):  
Sean Walkowiak ◽  
Christopher T. Bonner ◽  
Li Wang ◽  
Barbara Blackwell ◽  
Owen Rowland ◽  
...  
Keyword(s):  
Fusarium Graminearum ◽  
Pathogenic Fungus ◽  
Pathogenic Fungi ◽  
Toxin Production ◽  
In Planta ◽  
Head Blight ◽  
Trichothecene Mycotoxin ◽  
Yield And Quality ◽  
Potential Interactions

Fusarium graminearum is a pathogenic fungus that causes Fusarium head blight in wheat and lowers the yield and quality of grains by contamination with the trichothecene mycotoxin deoxynivalenol. The fungi coexist and interact with several different fusaria as well as other plant pathogenic fungi and bacteria in the field. In Canada, F. graminearum exists as two main trichothecene chemotypes: 3-acetyldeoxynivalenol and 15-acetyldeoxynivalenol. To understand the potential interactions between two isolates of these chemotypes, we conducted coinoculation studies both in culture and in planta. The studies showed that intraspecies interaction reduces trichothecene yield in culture and disease symptoms in wheat. To elucidate the genes involved in the intraspecies interaction, expression profiling was performed on RNA samples isolated from coinoculated cultures, and potential genes were identified by using the genome sequences of the respective isolates.

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