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Weaning of bullseye puffer (Sphoeroides annulatus) from live food to microparticulate diets made with decapsulated cysts of Artemia and fishmeal
García-Ortega, A.; Abdo, I.; Hernández, C. (2003). Weaning of bullseye puffer (Sphoeroides annulatus) from live food to microparticulate diets made with decapsulated cysts of Artemia and fishmeal. Aquacult. Int. 11(1-2): 183-194
In: Aquaculture International. Springer: London. ISSN 0967-6120, more
Peer reviewed article  

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Keywords
    Diets; Hatcheries; Proteins; Weaning; Artemia Leach, 1819 [WoRMS]; Sphoeroides annulatus (Jenyns, 1842) [WoRMS]; Marine

Authors  Top 
  • García-Ortega, A., correspondent
  • Abdo, I.
  • Hernández, C.

Abstract
    Two experiments were carried out to test microparticulate diets for weaning hatchery-produced larvae and juveniles of bullseye puffer Sphoeroides annulatus. The diets were formulated with different protein sources: diet 1 with a combination of decapsulated cysts of Artemia and fishmeal, and diet 2 with a combination of fishmeal, squid, tuna gonad and shrimp meal. In the first experiment 60-days-old fish were weaned with the microdiets over five days. Fish survival after 11 weeks of feeding was 92% for diet 1, 85% for diet 2, and 95% for the control fish fed Artemia nauplii. Once it was determined that bullseye puffer can be adequately reared with artificial dry diets, diet 1 was used to test earlier times for weaning to reduce the period of Artemia feeding. In the second experiment, three different times were tested for initiation of weaning in sibling fish larvae, i.e., at 29, 34, and 39 days post-hatch. Small differences in weight, length and survival were found among weaning treatments after 23 days of feeding. When weaned at day 29 post-hatch, fish larvae grew from an initial weight of 38.4 mg and length of 11.1 mm to a final weight and length of 405.7 mg and 25.1 mm respectively. Final survival in this treatment was 49.3%. The reduced period of Artemia feeding would provide an economical alternative for the species to take into consideration for its culture at commercial scale.

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