EVALUATION OF A MICROBOUND SPRAY-DRIED FEED FOR THE REARING OF PENAEID SHRIMP LARVAE

C. E. Medina-Reyna, M. C. Chavéz-Sánchez, C. A. Martínez-Palacios, R. Pedroza-Islas-2000
North American Journal of Aquaculture, 62 (1): 73-77
Abstract:

The present work looks at the effectiveness of microbound spray-dried feed (MB-SD) elaborated with two phycocolloids, sodium alginate (ALG) and kappa-carrageenan (KAPACA), and no binder at all (SL). Feeding trials were carried out on larval Pacific white shrimp Litopenaeus vannamei from wild broodstock. Nauplii were stocked in 1.5-L round-bottomed flasks at a rate of 100 larvae/tank. Thirty thousand cells/ml (70% Chaetoceros muelleri and 30% Isochrysis galbana) were added to the artificial feed treatments as a single dose of live algae (SDLA) administered on the first day of the experiment. The MB-SD was given at 6-16 mg/l daily every 4 h from 0800 to 2000 hours. Water was not exchanged during the 10-d experimental period. The MB-SD with KAPACA gave the highest survival (61 +/- 4.6%), good mean individual dry weight (104 +/- 20.9 mg), and high metamorphic rate (81 +/- 14%), followed by MB-SD with ALG (56.9 +/- 4.1% survival; 65 +/- 10% metamorphic rate) and MB-SD with SL (49.2 +/- 6.2% survival; 76 +/- 12% metamorphic rate). The latter feeds did not show a significant difference; however, they were slightly better than live food (algae plus brine shrimp Artemia sp.; 51.3 +/- 7.9% survival; 52 +/- 8% metamorphic rate). The MB-SD with KAPACA provided good larval survival and growth and could be used in experimental larviculture.

(Centro de Investigación en Alimentación y Desarrollo A.C. (CIAD), Unidad Mazatlán en Acuicultura y Manejo Ambiental. Mazatlán, Sin. México)

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