Broodstock Development - 5 MCQ

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• Which is an obligate aerobic, oxidizing process?
  ক

  Nitrification

  খ

  Vaccination

  গ

  Immunization

  ঘ

  Bio-augmentation
• _________________ bacterial genus converts nitrite to nitrates.
  ক

  Pseudomonas

  খ

  Bacillus

  গ

  Nitrobacter

  ঘ

  Nitrosomonas
• Nitrosomonas converts toxic ammonia nitrite.
  ক

  True

  খ

  False
• In aquaculture _________________ should be maintained below 0.1 mg/L.
  ক

  Oxygen

  খ

  Salinity

  গ

  Ammonia

  ঘ

  Sodium chloride
• Which of the following can inhibit the growth of pathogenic bacteria?
  ক

  Bacitracin

  খ

  Glucans

  গ

  Sodium chloride

  ঘ

  Gram-negative bacteria
• Probiotic treatments are particularly desirable during ____________________
  ক

  larval stage

  খ

  adult stage

  গ

  fertilization

  ঘ

  pond preparation
• ________________ can be used to decrease the load of pathogenic bacteria in aquaculture water.
  ক

  Liming

  খ

  Bleaching

  গ

  Bio-remediation

  ঘ

  Probiotics
• ____________________ is the most extensively cultured crustacean in the world.
  ক

  Penaeid shrimp

  খ

  Crab

  গ

  Crayfish

  ঘ

  Lobster
• After chlorination of waste-water, _____________ is done to neutralize chlorine before discharge.
  ক

  titration

  খ

  vaporization

  গ

  condensation

  ঘ

  staining
• What is added in waste water treatment of an aquaculture water outlet?
  ক

  Sodium hypochlorite

  খ

  Sodium chloride

  গ

  Ethanol

  ঘ

  Acetone
• __________________ is maintaining a group of aquatic animals under isolation.
  ক

  Biostimulation

  খ

  Bioaugmentation

  গ

  Bioremediation

  ঘ

  Quarantine
• _______________ is used when specific pathogen exclusion from the environment is not possible.
  ক

  SPR stocks

  খ

  SPF stocks

  গ

  Pituitary extracts

  ঘ

  Hormonal injections
• Zero water exchange in aquaculture is a step towards _____________________
  ক

  temperature regulation

  খ

  biodiversity conservation

  গ

  pathogen inclusion

  ঘ

  pathogen exclusion
• The international movement of live shrimp is done for aquaculture.
  ক

  True

  খ

  False
• __________________ is the practice of exclusion of specific pathogens.
  ক

  Vaccination

  খ

  Hypophysation

  গ

  Biosecurity

  ঘ

  Liming