Feeding management plays a critical role in the
success of fish culture. The controlled production of larvae from captive brood
stock or the hatchery production of fry has now become a routine operation for
most of the ornamental fishes. The main reason for this is that the developing
larvae are usually very small, extremely fragile, and generally not physiologically
fully developed. The food to be ingested by a larva it first has to
be detected and so the degree of development of the functional sense organs
such as the optical receptors (eyes), chemoreceptors (olfactory organs, taste
buds) and mechanoreceptors (lateral line) is crucial. Moreover, live food
organisms usually have a much better contrast than artificial feeds and
generally have a triggering effect by their continuous movement, allowing an
enhanced perception by the feeding larva. Similarly, the swimming activity of
live food organisms generally assures a good distribution of food items in the
water column, this in turn facilitating more frequent encounters with the
developing larvae which in most cases have a low mobility. However, formulated
feeds do not generally meet all these requirements and usually result in poor
growth and survival for fish larvae. Nutritional quality of live food in
aquaculture is important for survival and growth of larvae (Szyper et al,
1989). Now a days, in fresh water ornamental fish larval rearing commonly used
live food organisms are Paramecium, Micro
worms , Moina , daphnia, blood worms, baby brine shrimps(Artemia) etc,. The present paper is to describe the
various techniques employed for the production of live food organisms.
More reading at: http://aquafind.com/articles/Live_Foods_For_Ornamental_Fishes.php
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