Evaluación de una mezcla de microalgas cianofitas y diatomeas en el cultivo de artemia franciscana (Kelloog, 1906).

Abstract

The intake of live feed such as phytoplankton and zooplankton provide many benefits in larval cultures of fish and shrimp. The perception of finding the appropriate species of microalgae and a correct dosage to feed Artemia franciscana has increased, its economic importance stands out for its nutritional quality, ease of ingestion and excellent digestion capacity, contrary to balanced foods. In this context, the use of 2 species of microalgae is proposed to evaluate the effect on the growth, survival, final biomass and nutritional composition of Artemia franciscana. This study was carried out in the Machala canton that belongs to the province of El Oro, specifically in the Cytogenetics Laboratory of the Faculty of Agricultural Sciences, where 9 buckets with a volume of 10 liters of water were randomly placed at 30 ups, the density Sowing rate was 200 nauplii/liter for each experimental unit and constant aeration was maintained to provide homogeneity of the culture parameters. Three diets of three repetitions considered T1, T2, T3 were supplied; of which T1 belongs to 100% Diatoms, T2 to 100% Cyanophytes and T3 to the mixture of both species at 50% of the dosage which was 130,000 cells/ml, which lasted 8 days. The results indicate that T1, T2 and T3 do not present significant differences depending on the increase in size of Artemia franciscana, however, the growth of the mixtures was higher. Likewise, T1 recorded the highest percentage of survival and final weight among the treatments, showing that the monoalgal feeding of Chaetoceros sp turned out to be the most beneficial in the first days of culture due to its size. On the other hand, the protein values obtained did not present a significant difference, although a better numerical result was obtained in T2. Based on the present results, it can be concluded that the effect of of the Diatoms of the genus Chaetoceros sp is the most relevant in this type of crop.