Dactylogyrosis Disease in Biofloc Tank?

Gill Fluke Disease in Fish

• This disease is scientifically called as Dactylogyrosis disease
• The causative agent of the disease is monogenic trematode, under the genus Dactylogyrus
• It causes serious infection in fishes and mainly carps and related species are more likely to be affected by the parasites
• Three species of Dactylogyrus is mainly found in carps:
  • D. exitensis,
  • D. vastator and
  • D. lamellatus are found in carps.
• These are found on the body, fins and gills of fish.
• They can be found throughout the year in a pond if not treated regularly
• They mainly start appearing in the rainy seasons
• They multiply rapidly and their intensity found to be maximum during winter seasons
• Juveniles are mostly affected, however, can affect adults also.
• The main reasons for the infestation are:
  • High Organic Load
  • High Stocking Density

• Symptoms of Infected fish

  • Infected fishes rest near the surface of the pond margin,
  • Swim very slowly,
  • Feel suffocation and gasping air
  • More slimy,
  • Dropping or folding of fins and
  • Pale gills.

• Treatments:

  • Bath Treatment with 3% salt solution for 10-30minutes
  • Indefinite treatment with 0.5-1% Salt solution
  • Alternative baths with 1:2,000 acetic acid and 2% sodium chloride are effective.
  • 10 ppm of potassium permanganate bath for 1-2 hours
  • 5 ppm in the pond may give good results
  • Bromex – 50 (0.18 ppm)
  • Dylox (0.25 ppm) are effective to control the disease

Gyrodactylosis disease in Fish

• This disease is scientifically called as Gyrodactylosis
• The causative agent of the disease is also a monogenic trematode, under the genus Gyrodactylus
• It causes serious infection in fishes and mainly carps and related species
• They are found on the fins and on the body of the fish
• Clinical Signs:
  • Production of more slime,
  • Damage of fins and
  • Darkening of the body colour.
• The medicines used against Dactylogyrosis are also effective to control this disease.