Development time of male and female rotifers with sexual size dimorphism

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• 作者：Xu-Wang Yin ; Bing-Bing Tan ; Yan-Chun Zhou ; Xiao-Chun Li ; Wei Liu
• 关键词：Cost of sex ; Dwarf male ; Haploid ; Mictic female ; Sexual reproduction
• 刊名：Hydrobiologia
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：767
• 期：1
• 页码：27-35
• 全文大小：690 KB
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• 作者单位：Xu-Wang Yin (1)
  Bing-Bing Tan (1)
  Yan-Chun Zhou (1)
  Xiao-Chun Li (1)
  Wei Liu (2)
  
  1. Liaoning Provincial Key Laboratory for Hydrobiology, College of Fisheries and Life Science, Dalian Ocean University, Dalian, China
  2. The First Institute of Oceanography, SOA, Qingdao, 266061, China
  
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Life Sciences
  Hydrobiology
  Ecology
  
• 出版者：Springer Netherlands
• ISSN：1573-5117

文摘

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