caa a22 4500 445891319 CHVBK 20180317145617.0 cr unu---uuuuu 170323e20110101xx s 000 0 eng 10.1007/s10750-010-0459-5 doi (NATIONALLICENCE)springer-10.1007/s10750-010-0459-5 Ecological strategy of rotifer ( Brachionus calyciflorus ) exposed to predator- and competitor-conditioned media [Elektronische Daten] [Ruixin Guo, Terry Snell, Jiaxin Yang] Chemical communication may inform about the location of prey, predators, co-specifics, and mate partners in zooplankton. In this study, we evaluated several life-history traits of the rotifer, Brachionus calyciflorus, exposed to conditioned media by a rotifer predator (Asplanchna brightwelli) and a cladocera competitor (Daphnia similis), quantifying population growth and life-table demography at two algal food levels (2.0 and 0.5×106 cells ml−1 of Chlorella pyrenoidosa). At both food levels, B. calyciflorus grown in predator-conditioned media had lower population abundance and slower population growth rate than controls. Conversely, the competitor-conditioned media treatments produced both higher rotifer population abundance and faster population growth rate than controls. Life-history parameters varied significantly depending on the presence of predator and competitor-conditioned media. The Asplanchna-conditioned media significantly decreased gross reproductive rate (GRR): 8-9 offsprings per female; net reproductive rate (R 0): 6-7 offsprings per female; population growth rate (r): 0.34-0.37day−1; and increased generation time (T): 5.5-5.6days. On the other hand, The Daphnia-conditioned media significantly increased the GRR (13-14 offsprings per female); net reproductive rate (8-9 offsprings per female); population growth rate (0.42-0.43day−1); and decreased generation time (4.9-5.0days). However, the effects of food level on the life-history characteristic were not significant in both treatments. Maximum values of the population abundance and the population growth rate are significantly influenced by the predator densities and pre-culture time. This study suggests that rotifers use variable life-history strategies (low reproduction and high survivorship versus high reproduction and low survivorship) based on the presence of predators and competitors. Springer Science+Business Media B.V., 2010 Chemical communication nationallicence Life table nationallicence Population growth nationallicence Brachionus calyciflorus nationallicence Predator-competitor induce nationallicence Guo Ruixin Jiangsu Key Laboratory for Biodiversity and Biotechnology, School of Life Sciences, Nanjing Normal University, 210046, Nanjing, China aut Snell Terry School of Biology, Georgia Institute of Technology, 30332, Atlanta, GA, USA aut Yang Jiaxin Jiangsu Key Laboratory for Biodiversity and Biotechnology, School of Life Sciences, Nanjing Normal University, 210046, Nanjing, China aut Hydrobiologia Springer Netherlands 658/1(2011-01-01), 163-171 0018-8158 658:1<163 2011 658 10750 https://doi.org/10.1007/s10750-010-0459-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10750-010-0459-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Guo Ruixin Jiangsu Key Laboratory for Biodiversity and Biotechnology, School of Life Sciences, Nanjing Normal University, 210046, Nanjing, China aut NATIONALLICENCE 700 1- Snell Terry School of Biology, Georgia Institute of Technology, 30332, Atlanta, GA, USA aut NATIONALLICENCE 700 1- Yang Jiaxin Jiangsu Key Laboratory for Biodiversity and Biotechnology, School of Life Sciences, Nanjing Normal University, 210046, Nanjing, China aut NATIONALLICENCE 773 0- Hydrobiologia Springer Netherlands 658/1(2011-01-01), 163-171 0018-8158 658:1<163 2011 658 10750 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer