Freshwater aquaculture and Hatchery technology

Aquaculture is

• farming of only fishes

• farming of aquatic organisms

• farming of fishes and shellfishes only

• farming of seaweeds only

Channa species are commonly known as

• murrels

• catfishes

• brackishwater fishes

what are the term used for all organisms found in water which are non- motile and cannot swim against the water current.

• neuston

• benthos

• Plankton

• nekton

Common name of Ctenopharyngodon idella is

• silver carp

• grass carp

• magur

• common carp

oil cake fertilizer is

• plant derived fertilizer

• animal derived fertilizer

• inorganic fertilizer

super phosphates are

• inorganic fertilizer

• organic fertilizer

• plant derived fertilizer

• animal derived fertilizer

urea is a

• phosphate fertilizer

• nitrogen fertilizer

• potassium fertilizer

biogas slurry is a

• green manure

• liquid manure

• solid manures

• inorganic fertilizers

write an example for a primary nutrient

• calcium

• potassium

• magnesium

• sulphur

cobia is a

• freshwater fish

• brackishwater fish

• marine fish

• shellfish