Life history of Karualona muelleri (Richard, 1897) (Chydoridae, Aloninae)

Life history of Karualona muelleri

  • Eliana A. Panarelli | Universidade do Estado de Minas Gerais, Frutal, Brazil.
  • Helen A. O. Kawamura Universidade do Estado de Minas Gerais, Frutal, Brazil.
  • Lourdes M. A. Elmoor-Loureiro Grupo de Estudos de Ecossistemas Aquáticos (GEEA), Brazil.
  • Francisco D. R. Sousa Grupo de Estudos de Ecossistemas Aquáticos; Unidade Acadêmica Especial de Ciências Biológicas, Universidade Federal de Jataí,, Brazil.
  • Paulo H. C. Corgosinho Department of General Biology, UNIMONTES, Campus Universitário Professor Darcy Ribeiro, Montes Claros, Brazil.
  • Daniel Previattelli Instituto de Biociências, Universidade de São Paulo, Brazil.
  • Carlos E. F. Rocha Instituto de Biociências, Universidade de São Paulo, Brazil.


Many taxonomic issues still need to be solved for the family Chydoridae, but mainly in the subfamily Aloninae. The species Karualona muelleri is an example of a recent taxonomic redefinition, since it was decoupled from the genus Alona and translocated to another genus. In order to expand our knowledge on the species, we investigated population growth and compared the morphometry of the first and second instars, male, parthenogenetic female, ephippial female, and ephippium. An experimental population was obtained by hatching resting eggs collected from the sediment in a temporary lake located in the Serra da Canastra National Park (Minas Gerais, Brazil). The hatched individuals were subjected to morphometric analyses and used in experiments to assess population growth and fecundity. Reproductive age and lifespan were also monitored in two groups of females in different life stages: parthenogenetic and gamogenetic. The reproductive age occurred between the 1st and 15th days of life, and the greatest longevity was 17 days. The start of gamogenetic reproduction was stimulated by elevated population densities and it characterized the slowdown of exponential population growth. Morphometric analyses detected differences between the development phases, as well as similarities in the morphological features of the male, first and second instars, and the two types of females.



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Original Articles
Edited By
Federico Marrone, University of Palermo, Italy
Supporting Agencies
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP), Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Cladocera, morphometric characteristics, population dynamics, sexual and asexual reproduction
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How to Cite
Panarelli EA, Kawamura HAO, Elmoor-Loureiro LMA, Sousa FDR, Corgosinho PHC, Previattelli D, Rocha CEF. Life history of Karualona muelleri (Richard, 1897) (Chydoridae, Aloninae): Life history of Karualona muelleri. J Limnol [Internet]. 2019Jul.26 [cited 2021May10];78(3). Available from:

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