Morphometric characterization of Dinophysis acuminata/D. sacculus complex in Guanabara Bay, Brazil

Authors

  • José Juan Barrera-Alba Universidade Federal de São Paulo, Departamento de Ciências do Mar
  • Fernanda Reinhardt Piedras Universidade do Estado do Rio de Janeiro, Faculdade de Oceanografia, Departamento de Oceanografia Biológica
  • Carla Lucatelli Duarte Universidade Federal de São Paulo, Departamento de Ciências do Mar
  • Raquel Neves Tavares Lopes Universidade do Estado do Rio de Janeiro, Faculdade de Oceanografia, Departamento de Oceanografia Biológica
  • Gleyci Aparecida Oliveira Moser Universidade do Estado do Rio de Janeiro, Faculdade de Oceanografia, Departamento de Oceanografia Biológica

Keywords:

dinoflagellates, Dinophysis acuminata, Dinophysis sacculus, eutrophic marine ecosystem, South Atlantic Central Water

Abstract

Abstract: Most studies of Dinophysis acuminata in Brazil are for the southern region, where blooms are recurrent. In 2016, the presence of D. acuminata caused the first-ever production and consumption of species of mollusks commercial embargo from the state of Sao Paulo, Southeast Brazil. Potentially toxic species of Dinophysis have been reported in Guanabara Bay (GB) but only occasionally and in low densities. The present note is the first report of a high-density event (~105 cells L-1) of D. acuminata/D. sacculus complex in GB. D. acuminata/D. sacculus complex species were identified using scanning-electron and inverted-light microscopy. Most of the studied cells possessed a dorsally convex hyposomal plate and had dimensions typical of D. acuminata. However, the observed association with warmer and less saline estuarine waters would indicate that the species could be D. sacculus. Whatever the case, based on the high cell densities observed here, we recommend a continued monitoring for Dinophysis presence in GB.
Issue Cover Vol.: 19 Num: 3

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Published

2019-01-01

How to Cite

Barrera-Alba, J. J., Piedras, F. R., Duarte, C. L., Lopes, R. N. T., & Moser, G. A. O. (2019). Morphometric characterization of Dinophysis acuminata/D. sacculus complex in Guanabara Bay, Brazil. Biota Neotropica, 19(3). Retrieved from //www.biotaneotropica.org.br/BN/article/view/1660

Issue

Vol. 19 No. 3 (2019): v19n3

Section

Short Communications