Rearing Techniques of Sturgeons: The Culture of Live Food for
Sturgeon Juveniles, a Mini Review of the Russian Literature
A. Vedrasco, V. Lobchenko, I. Pirtu, R. Billard-2002
International Review of Hydrobiology, 87(5-6):
569-575
Abstract:
A brief survey of the Russian literature of the
production of live preys for feeding young sturgeons is presented. These
preys are plankton organisms (Moina, Daphnia, Artemia), chironomids
and oligochaets cultured in large scales mostly in state hatcheries to
produce sturgeon juveniles for stocking. Thus those culture systems operate
only for a short period of time. In general, an innoculum of broodstock
material is introduced into the tank or the pond in which the preys are
cultivated. Various feeds and fertilisers are distributed. Daily production
is 10 g/m2 for chironomids and 55 g/m2 for
oligochaets. For daphnia, under optimum condition of temperature and water
quality the production is 20 to 35 g/m3 for the whole season.
Such productions are high but the systems operate only during few months
corresponding to the short rearing period of sturgeon, at least in the case
of stocking. In indoor condition the plankton is distributed to the
sturgeons in the rearing tank. One way is to keep constant the plankton
concentration (5 mg plankton wet weight per 1 m3 of water).
Associations of preys are also given; for instance zooplankton and
oligochaets distributed in % of the fish biomass: 20% the first 20 days and
15% from days 30 to 40.
(Fisheries Research Station, Teilor St 4, MD-277043
Chisinau, Moldavia, e-mail of R. Billard: billard@mnhn.fr)