Influence of artificial
insemination on the reproductive performance of Farfantepenaeus paulensis
in conventional and unisex maturation systems
S. Peixoto, R.O. Cavalli, D. Krummenauer, W.
Wasielesky, F. D'Incao-2004
Aquaculture, 230(1-4): 197-204
Abstract:
The application of artificial insemination techniques
as a way to overcome the lack of mating of the closed thelycum Farfantepenaeus
paulensis under large scale conditions is reported. The performance of
artificially inseminated females (49.4±11.6 g) maintained in conventional
versus unisex maturation systems was compared. Groups of unilaterally
eyestalk-ablated females were artificially inseminated with one compound
spermatophore soon after molting. The percentage of fertilized spawns
increased from 26% before the use of artificial insemination to 57%
afterwards. The reproductive performance of inseminated females held in
conventional or unisex maturation systems showed no significant differences.
Artificial insemination was considered a practical approach to overcome the
lack of mating of F. paulensis under large-scale conditions with
acceptable reproductive performance. The results also indicate the
possibility of holding females separately from males, which could mean
significant improvements in maturation systems through the increase in the
stocking density of spawning females.
(Laboratório
de Maricultura, Departamento de Oceanografia, Fundação Universidade
Federal do Rio Grande, C.P. 474, 96201-900, Rio Grande, RS, Brazil, e-mail: silvio@mikrus.com.br)