Rearing enhancement of Ovalipes trimaculatus (Crustacea: Portunidae) zoea I by feeding on Artemia persimilis nauplii enriched with alternative microalgal diets

MARTELLI, ANTONELA; BARBIERI, ELENA S.; DIMA, JIMENA B.; BARÓN, PEDRO J.

Scientific Reports

Nature Publishing Group

Año: 2020 vol. 10

the southern surf crab Ovalipes trimaculatus (de Haan, 1833) presents a high potential foraquaculture. In this study, we analyze the benefits of different dietary treatments on its moltsuccess and fitness of larval stages. Artemia persimilis nauplii were enriched with monospecific(Nannochloropsis oculata, Tetraselmis suecica, Dunaliella salina, Isochrysis galbana and Chaetocerosgracilis) and multispecific (Mix) microalgal diets twice a day over a 48-h period. Mean total length (TL),growth instar number (I) and gut fullness rate (GFR) of nauplii showed significant differences betweendietary treatments at several sampling times, optimal results being observed in those providing Mix.Artemia nauplii grown under most experimental dietary treatments reached the capture size limitfor Ovalipes trimaculatus zoea I (700 µm) within 24 h. After that time interval, Mix-enriched naupliiwere amongst those with higher protein contents. Ovalipes trimaculatus zoea i fed on Artemia naupliienriched during 24 h under different dietary treatments showed significant differences in survival,inter-molt duration, molting success to zoea II and motility. Optimal results were observed in zoeaI fed on Mix-enriched Artemia nauplii. This work not only represents a first step towards the dietaryoptimization for O. trimaculatus zoeae rearing but also provides the first results on the use of enrichedA. persimilis.