Olivera, A., Vinatea, L., Beltrame, E.
Abstract:
The pink shrimp Penaeus paulensis is cultured since 1986 in the south
of Brazil, in a subtropical region, presenting excellent growth rate,
and also in winter it continues growing at 15 C; and that's why it is
considered as cold tolerant species. Since 1992 shrimp production has
incremented notoriously in the region, principally with P. paulensis
through replenishment programs in coastal lagoons and ponds
cultures. The commercial production of P. paulensis post-larvae (PL)
is practiced only in the University's Laboratory (LCM - UFSC), that
reached a production of 55 million of PL10 in 1995 with survivals of
72 % in 21 days of larviculture.
With the purpose to improve the PL quality, diminish production
costs and increase the initial survives in coastal lagoons and ponds,
there were developed six larviculture process with commercial size
until PL20 in 20,000 liter tanks. Temperature was 25 C until PL1 and
24 C until PL20. Densities of 100 larvae/liter and 40 PL/liter
respectively, were carried out. For protozoeal stages
microencapsulated diet was used, as well as the Bacillariophyceae
microalga Chaetoceros calcitrans and for the mysis 1 to PL10 stages
Chaetoceros calcitrans and Artemia sp nauplii (strain GSL) were
offered.
Comparing the results of these commercial larvicultures with those
that are traditionally practiced, there was not a significative difference
in test T (P<0.05) in surviving and metamorphosis terms; however a
decrease of the production cost in PL and principally the reduction of
50 % in Artemia sp. cysts consumption was observed.
(Laboratorio de Camaroes Marinhos, Centro de Ciencias Agrarias
Universidade Federal de Santa Catarina, P.O Box 476, CEP
88040-970 Florianopolis, Santa Catarina, Brazil)