BioOne.org will be down briefly for maintenance on 17 December 2024 between 18:00-22:00 Pacific Time US. We apologize for any inconvenience.
How to translate text using browser tools
1 July 2010 Stocking Density and Captive Sea Urchin Paracentrotus lividus (Lamarck, 1816) Gamete Production and Fertilization
João Gago, Orlando J. Luís
Author Affiliations +
Abstract

Given that sea urchins eggs and larvae have been proposed as putative prey in marine larviculture, broodstock rearing conditions must be optimized for this purpose. In the current study, adult sea urchins Paracentrotus lividus were reared in 400-L tanks for 5 mo under 4 stocking densities (100, 200, 300, and 400 sea urchins/m2 of tank base area) to determine their effect on spawning performance and fertilization rate, and on broodstock month relative growth. For all stocking densities, more than 60% of sea urchins induced to spawn released a large number of gametes (more than 200 × 106 spermatozoa or more than 500 × 103 eggs per spawning). The percentage of males with large emissions was higher at a density of 300 sea urchins/m2. Irrespective of broodstock stocking density, fertilization rate was always higher than 90%. Lower relative growth was recorded with densities of 300 sea urchins/m2 and 400 sea urchins/m2 compared with 100 sea urchins/m2. We conclude that under the rearing conditions adopted in this study, captive P. lividus broodstock can be at least reared up to 400 sea urchins/m2 without impairing reproductive performance.

João Gago and Orlando J. Luís "Stocking Density and Captive Sea Urchin Paracentrotus lividus (Lamarck, 1816) Gamete Production and Fertilization," Journal of Shellfish Research 29(2), 513-516, (1 July 2010). https://doi.org/10.2983/035.029.0230
Published: 1 July 2010
KEYWORDS
broodstock growth
fertilization rate
gamete production
Paracentrotus lividus
spawning performance
stocking density
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top