Invasive Species Compendium

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Abstract

Survival, metamorphosis and growth of larvae of the yellowleg shrimp, Penaeus californiensis (Decapoda: Penaeidae) fed on different microalgae.

Abstract

The effect of three microalgae, Chaetoceros gracilis, Isochrysis galbana, and Dunaliella sp. on the larval development of yellowleg shrimp Penaeus californiensis, was evaluated in the Oyster Production Center of Bahia Kino, Sonora, Mexico. The effects of each microalgae (1) individually, (2) combined and (3) mixed with Artemia nauplii (from zoea III stage), were considered. Twenty four experimental units (three 16.0-litre plastic bottles per treatment) were used. During the experiment temperature was maintained around 25°C, and salinity around 35 ppt. The stocking density of nauplii was 50/l. The best survival was obtained with C. gracilis (55%), followed by the mixture of C. gracilis and Dunaliella sp (48%). The worst survival was observed in the treatment with Dunaliella sp. A delay in metamorphosis times was observed in treatments without C. gracilis. Differences (P<0.05) in growth from zoea II stage were recorded in those treatments.