Assessment of the potential of endemic microalgae from the coastal zone of Baja California Sur, México, to feed Artemia franciscana.

juan manuel pacheco vega, Marco Antonio Cadena Roa, Felipe Ascencio, Carlos Rangel-Dávalos, Maurilia Rojas Contreras


DOI: https://doi.org/10.3856/vol43-issue1-fulltext-3

Abstract


In this study, five strains of microalgae were isolated from Bahía de La Paz, Baja California Sur, Mexico and further identified as Grammatophora sp., Navicula sp., Rhabdonema sp., Schizochytrium sp., and Nitzchia sp. by standard taxonomic studies. The strains were cultured outdoor and (hatched) harvest after four days. The protein, lipid, and carbohydrate composition and the fatty acid profiles of the strains were determined by gas chromatography. To assess the effect of microalgae strains in Artemia franciscana, were decapsulated the cysts (A. franciscana) and then cultured at outdoor conditions at one nauplius mL-1 and the microalgal density was maintained at 70 000 cells mL-1. The experiment was conducted in 15-L tanks for twelve days.  Samples were taken at the beginning and end of the experiment to assess the number, size, and weight of Artemia larvae. Rhabdonema sp. showed a lower percentage of polyunsaturated fatty acids (PUFAs), while Grammatophora sp. had the greatest proportion of PUFAs, even more than Chaetoceros muelleri (control). The microalga Schizochytrium sp. did not show either Docosahexanoic (DHA) or Eicosapentaenoic (EPA) fatty acids. Growth and survival of A. franciscana did not show significant differences, except when Artemia was fed with Nitzchia sp., showing lower survival and dry weight. Treatments based on Schizochytrium sp. and Rhabdonema sp. had a greater size. It is advisable to use the present strains for culturing A. franciscana.

pacheco vega j, Cadena Roa M, Ascencio F, Rangel-Dávalos C, Rojas Contreras M. Assessment of the potential of endemic microalgae from the coastal zone of Baja California Sur, México, to feed Artemia franciscana.. Lat. Am. J. Aquat. Res.. 2016;43(1). Available from: doi:10.3856/vol43-issue1-fulltext-3 [Accessed 20 Jan. 2019].
pacheco vega, j., Cadena Roa, M., Ascencio, F., Rangel-Dávalos, C., & Rojas Contreras, M. (2016). Assessment of the potential of endemic microalgae from the coastal zone of Baja California Sur, México, to feed Artemia franciscana.. Latin American Journal of Aquatic Research, 43(1). doi:http://dx.doi.org/10.3856/vol43-issue1-fulltext-3