A) Build up of carbondioxied B) Need of buffering system C) Absence of photosynthesis D) Lethal increase in pH
A) Temperature and dissolved oxygen B) Turbidity and pH C) Photosynthesis and respiration D) Alkalinity and hardness
A) Rice molass B) Soya bean cake C) Biological covers D) Sugar cane bagass
A) Benthos B) Necton C) Plankton D) Detritus
A) 3mlphytoplankton/ 100l of pond water B) 20ppm hardness C) 110% saturated total ammonia D) A water transparency of 60cm
A) Complete feed B) Natural food C) Supplementary feed D) Fish
A) 30% B) 10% C) 15% D) 50%
A) Improve nutrient loss by leaching B) Encourage food wastage C) Discourage uniformity in fish size D) Reduce dissolved oxygen consumption of fish
A) At selected pond area B) Neither C) Either D) On entire pond area
A) 0.5 difference B) 25% C) 1:2:4 D) 1:2:1
A) 25% B) 4% C) 50% D) 70%
A) Good water drainage B) Avoiding soil erosion C) High water holding capacity D) Disallowing run off into the fish pond
A) Nearness to market B) Fencing of pond area C) Fast growing species D) Detailed survey of site
A) 5cm and 7.5cm B) 5cm and 7.5-10cm C) 7.5cm-5cm D) 7.5-10cm and 5cm
A) Ditch B) Spillway C) Dam D) Monk
A) Plastic pond B) Concrete pond C) Recirculatory pond D) Earthen point
A) The types of lives present in it B) The interaction of lives with the non living environment C) The nutrient content D) The number of lives it can support
A) Forage B) Fish feed C) Compost D) Ration
A) The are formulated/prepared B) They can be initiated through decomposition C) Examples are larvae and water lettus D) They are life and dead foods
A) Necton B) Detritus C) Benthos D) Plankton
A) The type and the amount B) The species and the habitat C) The behaviour and the number D) The nutrient and the size
A) Fish meal B) Rumen content C) Groundnut cake D) Wheat middling
A) Sinking ability B) Floating ability C) Wastage D) Disatisfaction
A) Feeding fish to compensate for over stocking B) Feeding fish with certain mass to achieve a known body weight C) Feeding fish with certain mass for a period of time D) Feeding fish with certain mass of its body weight
A) Water temperature B) Stocking rate C) None D) Natural food
A) Natural food B) Artificial feed C) Phytoplankton D) Zooplankton
A) Pellet B) Mash C) Mill D) Syrup
A) It smothers fish eggs B) Aquatic habitat turns land habitat C) It increases light penetration D) Beneficial bacteria are killed
A) Chroloplast B) Cytoplasm C) Mitochondrion D) Ribosome
A) Water temperature B) Fish metabolism C) Fish size D) None |