Effect of number
of spawns on the resulting spawn quality of 1-year-old pond-reared Penaeus
vannamei (Boone) broodstock
E. Palacios, I.S. Racotta-2003
Aquaculture
Research, 34(5):
427
Abstract:
For production of shrimp larvae in a
commercial hatchery, multiple spawning of females is highly desirable,
provided spawn quality is not affected. Using biochemical and production
approaches, 349 females were individually followed, and 69 spawns were
sampled over a 3-month period. The quantity of eggs and nauplii per spawn
was greater in females with multiple spawns. Several indicators of spawn
quality, such as fertilization and hatching rates, per cent of viable
spawns, and morphometric characteristics of eggs and nauplii were not
affected by consecutive spawns. Analyses of egg and nauplii biochemical
composition indicate that adequate transfer of nutrients to eggs is not
compromised with successive rematurations and spawnings. Strategies that
focus on the selection of shrimp with multiple spawning capacities could be
a promising approach to increasing larvae production.
(División de Biología Marina, Centro de Investigaciones Biológicas del
Noroeste, Apdo. Postal 128, La Paz, Baja California Sur 23000, México.
E-mail: epalacio@cibnor.mx)