caa a22 4500 445894725 CHVBK 20180317145628.0 cr unu---uuuuu 170323e20110601xx s 000 0 eng 10.1007/s10750-011-0684-6 doi (NATIONALLICENCE)springer-10.1007/s10750-011-0684-6 Chytrid infection reduces thoracic beat and heart rate of Daphnia pulicaria [Elektronische Daten] [D. Peñalva-Arana, Kenneth Forshay, Pieter Johnson, J. Strickler, Stanley Dodson] Zooplankters are hosts to numerous endo- and ectoparasites, some of which have dramatic impacts on their hosts. Epizootics on zooplankton are probably more widespread in lake systems than it is currently known, and few studies have explored the direct and indirect importance of parasitism in aquatic food webs. In addition, our understanding of the sublethal effects of parasitic infections on host organisms and populations is limited. We used a novel electro-chemical based technique to measure in the outflow of the feeding current changes in the beat rate of the thoracic appendages in female Daphnia pulicaria. We observed simultaneously the heart rates and compared chytrid infected animals with uninfected gravid and non-gravid ones. We found in uninfected animals a thoracic beat rate of 3.81±018Hz and a heart rate of 4.67±0.42Hz. Gravid daphnids had a 14% lower thoracic beat rate (3.27±0.30Hz) than non-gravid females while the heart rate did not significantly differ (4.48±0.28Hz). In contrast, infected animals showed a 22% lower thoracic beat rate (2.96±0.47Hz) and a 36% lower heart rate (2.98±0.5Hz) when compared with uninfected non-gravid females. We discuss the ways Daphnia are affected by Polycaryum leave infections on the individual and population level. Springer Science+Business Media B.V., 2011 Daphnia nationallicence Polycaryum laeve nationallicence Chytrid nationallicence Gravid nationallicence Thoracic beat nationallicence Heart rate nationallicence Sublethal effect nationallicence Peñalva-Arana D. Great Lakes WATER Institute, University of Wisconsin, 53204, Milwaukee, WI, USA aut Forshay Kenneth National Risk Management Research Laboratory, Ground Water and Ecosystems Restoration Division, U.S. Environmental Protection Agency, 74820, Ada, OK, USA aut Johnson Pieter Ecology and Evolutionary Biology Department, University of Colorado, 80309, Boulder, CO, USA aut Strickler J. Great Lakes WATER Institute, University of Wisconsin, 53204, Milwaukee, WI, USA aut Dodson Stanley Zoology Department, University of Wisconsin, 53706, Madison, WI, USA aut Hydrobiologia Springer Netherlands 668/1(2011-06-01), 147-154 0018-8158 668:1<147 2011 668 10750 https://doi.org/10.1007/s10750-011-0684-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10750-011-0684-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Peñalva-Arana D. Great Lakes WATER Institute, University of Wisconsin, 53204, Milwaukee, WI, USA aut NATIONALLICENCE 700 1- Forshay Kenneth National Risk Management Research Laboratory, Ground Water and Ecosystems Restoration Division, U.S. Environmental Protection Agency, 74820, Ada, OK, USA aut NATIONALLICENCE 700 1- Johnson Pieter Ecology and Evolutionary Biology Department, University of Colorado, 80309, Boulder, CO, USA aut NATIONALLICENCE 700 1- Strickler J. Great Lakes WATER Institute, University of Wisconsin, 53204, Milwaukee, WI, USA aut NATIONALLICENCE 700 1- Dodson Stanley Zoology Department, University of Wisconsin, 53706, Madison, WI, USA aut NATIONALLICENCE 773 0- Hydrobiologia Springer Netherlands 668/1(2011-06-01), 147-154 0018-8158 668:1<147 2011 668 10750 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer