Human_Eco_Quiz_2

______________ ecosystems are midway between natural and urban ecosystems

• City

• Agriculture

• Village

• Rural

Characteristics of rural ecosystems:

• Rural areas are mostly free from air and noise pollution.

• Drinking water is largely obtained from wells, canals, lakes

• people live in small clusters in thatched, mud houses

• Education , facilities are good

Aquaculture is the ________________ cultivation of aquatic plants or animals

• natural

• artificial

• man made

• machinery

_______________ include the extraction of food from the sea and the fresh water

• Fisheries

• marine

• aquaculture

___________ is rearing of the aquatic organisms in artificially made water bodies

• marine

• fishery

• aquaculture

_______________is cultivation of fish in a controlled environment often a coastal or inland pond, lake, reservoir or rice field

• Fish culture

• Fish ranching

• Fish farming

• Fish agri

___________ is a practice of keeping which fishes in captivity for the first few years in floating cages in coastal lagoons

• Fish farming

• Fish ranching

• Fish culture

___________ and __________ which migrate to rivers to spawn are cultivated by fish ranching method.

• Fish

• Hilsa

• Prawn

• Salmon

Tilapia is also known as aquatic _________

• animal

• chicken

• fish

• organism

Merit of aquaculture:

• Aquaculture reduces over harvesting of fisheries.

• High yield in small volume of water.

• High profit.

• Improved qualities of fish obtained by selection and breeding