Abstract

ISMINO-ORBE, Rosa Angélica et al. Influence of microalgae on the growth of freshwater rotifer Brachionus calyciflorus (Pallas, 1766), Loreto, Peru. Folia amazón. [online]. 2022, vol.31, n.1, pp.47-55. ISSN 1018-5674.  http://dx.doi.org/10.24841/fa.v31i1.570.

The objective of the present study was to evaluate the influence of chlorophytes on the population growth of the rotifer Brachionus calyciflorus. The experimental culture was carried out in nine 4 L polyethylene containers with a useful volume of 800 mL of filtered water where ten Brachionus calyciflorus rotifers were planted per container and fed with microalgae at a concentration of 6 x 106 cel mL-1: Chlorella sp. (Ch), Scenedesmus sp. (Sc) and Chlorella sp. + Scenedesmus sp. (Ch + Sc), during 15 days of culture. Rotifers were counted daily and population growth parameters were evaluated. The mean values of: temperature were 27,7 ± 0,31 º C, dissolved oxygen 4,9 ± 0,05 mg L-1 and pH 6,6 ± 0,22. The highest population values were with the mixture of Chlorella sp. + Scenedesmus sp. (yield of 1250 ± 523 ind mL-1, growth rate of 1,0 ±, 0,1 day, doubling time of 0,7 ± 0,1 day and the maximum density of organisms of 8142,9 ind mL-1). The feeding of the rotifers in the present study shows better population growth parameters with the mixture of Chlorella sp. and Scenedesmus sp.

Keywords : live feed; Scenedesmus; Chlorella; zooplankton.

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