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Hydrobiologia

, Volume 767, Issue 1, pp 27–35 | Cite as

Development time of male and female rotifers with sexual size dimorphism

  • Xu-Wang Yin
  • Bing-Bing Tan
  • Yan-Chun Zhou
  • Xiao-Chun Li
  • Wei Liu
Primary Research Paper

Abstract

Dwarfism in males is a common phenomenon in planktonic monogonont rotifers. Considering the small body size of males, some studies suggested that the development time of male rotifers is faster than that of females. However, empirical studies associated with such a speculation are scarce. In this study, we used two common rotifer species, Brachionus calyciflorus and Brachionus plicatilis (each with two geographical populations), to test the hypothesis that the development time of dwarf males is significantly shorter than that of females. Results showed that male eggs (embryos) were deposited much faster than female eggs (embryos) in both Brachionus species. However, the embryonic development time of these small male eggs (embryos) was longer than that of large female eggs (embryos). As a result, males needed significantly longer total development time than females. The total development time of males was 2–3 h longer than that of females in both Brachionus species. Male-producing and female-producing females in the two Brachionus species did not show any difference in development time. Because sexual reproduction begins at high population densities in both species, postponement of development in males will be advantageous by decreasing mating costs in male rotifers.

Keywords

Cost of sex Dwarf male Haploid Mictic female Sexual reproduction 

Notes

Acknowledgments

We thank several anonymous reviewers for constructive comments that improve our manuscript greatly. We also thank Booth M.J. for linguistic improvements. This study was supported by the National Natural Science Foundation of China (31000218; 41206110), the Program for Liaoning Excellent Talents in University (LR2015009), and the Natural Science Foundation of Dalian (2012J21DW013).

Supplementary material

10750_2015_2472_MOESM1_ESM.docx (15 kb)
Supplementary material 1 (DOCX 15 kb)

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Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  • Xu-Wang Yin
    • 1
  • Bing-Bing Tan
    • 1
  • Yan-Chun Zhou
    • 1
  • Xiao-Chun Li
    • 1
  • Wei Liu
    • 2
  1. 1.Liaoning Provincial Key Laboratory for Hydrobiology, College of Fisheries and Life ScienceDalian Ocean UniversityDalianChina
  2. 2.The First Institute of Oceanography, SOAQingdaoChina

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