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