Resumen

CONTRERAS-SILLERO, M. E. et al. Evaluation of growth and bromatological composition of the rotifer Brachionus plicatilis fed different native microalgae from the Gulf of California. Revista bio ciencias [online]. 2019, vol.6, e509.  Epub 02-Oct-2020. ISSN 2007-3380.  https://doi.org/10.15741/revbio.06.e509.

In aquaculture, producing the rotifer Brachionus plicatilis involves a continuous input of microalgae with specific requirements of culture variables. Thus, attempts are made to find new native microalgae strains that meet the nutritional needs of B. plicatilis and are adapted to the local environmental conditions. In our study we isolated and identified microalgae from Bahia de La Paz, B.C.S. and the Ahome estuary, Sinaloa, Mexico. Growth and bromatological composition of three Chaetoceros sp. (key number LPU-2, LPU-3, and LPU-4), Synechococcus sp. (key number LPU-10) and Dicrateria sp. (key number LPU-8) were evaluated, as well as their effect on growth and composition of the rotifer B. plicatilis. The microalga Isochyrisis galbana was used as control.

Rotifers were assessed in 17 L units at 22 °C during 7 days. These organisms were fed on a daily basis and reached the highest densities (48 rot. mL.-1) with Chaetoceros sp. LPU-2 and the control diet (I. galbana). The bromatological composition of rotifers was modified according to the microalga ingested, the highest lipid and protein concentrations were found with the following diets: Chaetoceros sp. LPU-2, Dicrateria sp. LPU-8, and I. galbana. Hence, the microalga Chaetoceros sp. LPU-2 is suggested for culture to feed Brachionus plicatilis.

Palabras llave : Endemic microalgae; Brachionus plicatilis; composition; live feeds.

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