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Micro algae culture & live feed culture for finfish hatchery

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Title Micro algae culture & live feed culture for finfish hatchery
Not Available
 
Creator Not Available
 
Subject Microalagae
COPEPODS
 
Description Not Available
Live food organisms include all plants (phytoplankton) and animal (zooplankton) lives
grazed upon by economically important fishes. Phytoplankton’s are generally eaten by
zooplankton. Thus, phytoplankton forms the basis of the food chain. Live foods are able
to swim in water column and are constantly available to fish and shellfish larvae are
likely to stimulate larval feeding response Most of the fish and shellfish larvae in nature
feed on small phytoplanktonic and zooplanktonic organisms. The success in the
hatchery production of fish fingerlings for stocking in the grow-out production system is
largely dependent on the availability of suitable live food for feeding fish larvae, fry and
fingerlings. Live food organisms contain all the nutrients such as essential proteins,
lipids, carbohydrates, vitamins, minerals, amino acids and fatty acids and hence are
commonly known as “living capsules of nutrition”. Providing appropriate live food at
proper time play a major role in achieving maximum growth and survival of the young
ones of finfish and shellfish. Two types of larvae are found in fishes precocial and
altricial. Precocial larvae are those that when yolk sac is exhausted, appear as miniadult exhibiting fully developed fins and mature digestive system. Such fish can ingest
and digest formulated diet as first food. But altricial larvae are those when the yolk sac
is exhausted remain in a relat ively undeveloped state. The digestive system is still
rudimentary lacking a stomach. Such digestive system seems to be incapable of
processing formulated diet. Live feeds are able to swim in water column and thus
constantly available to the larvae. Formulated diets tend to aggregate on the water
surface or sink quickly to the bottom and are thus normally less available to the larvae
than the live feed. In addition the movement of live feed in the water is likely to stimulate larval feeding responses since evolutionary history has probably adapted them to attack
moving prey in nature.
Not Available
 
Date 2016-11-18T06:43:09Z
2016-11-18T06:43:09Z
2015
 
Type Project Report
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/615
 
Language English
 
Relation Not Available;
 
Publisher Not Available