Upload
sreehari-sreekumar
View
143
Download
13
Embed Size (px)
Citation preview
Fish is a cheap source of animal protein for our food. There are two ways of obtaining fish.One is from natural resources ,which is called capture fishing.The other way is by fish farming..The water source of the fish be either seawater or fresh water ,such as in rivers and ponds.Fishing can thus be done both by capture and culture of fish in marine and freshwater ecosystems.
India’s marine fishery resources include 7500km of coastline and
deep seas beyond popular marine fish varieties include
promphret ,mackerel ,tuna,sardines,and bombay duck.
Marine fisheries
PRONPHERET MACKEREL TUNA
SARDINES BOMBAY DUCK
Some marine fishes & shell fishes are of high economic value are also farmed in sea water.They are :
mullets prawn pearl spot
mussels oysters
Marine fish stocks get further depleted,the demand for more fish can only be met by such culture fisheries,a practice called mariculture.
Aquaculture, also known as aquafarming, is the farming of
aquatic organisms such as fish, crustaceans, molluscs and aq
uatic plants.Aquaculture involves cultivating freshwater and saltwater
populations under controlled conditions, and can be contrasted
with commercial fishing, which is the harvesting of wild
fish.Mariculture refers to aquaculture practised in marine environments.
Composite fish culture
More intensive fish farming can done in composite fish culture
system. Both local and imported fish species are used in such
systems.
In such a system a combination of 5 to 6 fish species is used in a single pond
They are;
DisadvantageOne problem with such composite fish
breed only during monsoon .Even if fish seed is collected from the wild , it can be
mixed with that of other species as well .So , a major problem in fish farming is the
lack of availability of good seeds.
Fish production