caa a22 4500 445892579 CHVBK 20180317145621.0 cr unu---uuuuu 170323e20110301xx s 000 0 eng 10.1007/s10750-010-0495-1 doi (NATIONALLICENCE)springer-10.1007/s10750-010-0495-1 Daphnia -rotifer interactions in Patagonian communities [Elektronische Daten] [María Diéguez, John Gilbert] In fishless ponds of extra-Andean Patagonia, large Daphnia often may severely limit the abundance of small rotifers by mechanical interference (ingestion and damage after rejection). In ten laboratory experiments, 15-20 rotifers were exposed to one large daphniid for 1day in 80ml water with Cryptomonas erosa (5×103cellsml−1). Both D. cf. pulex (3.6mm) and D. cf. obtusa (3.4mm) imposed significant mortality on Keratella tropica and newborn Brachionus angularis and Brachionus calyciflorus, but not on the larger neonates of Brachionus rubens or adults of B. angularis and B. calyciflorus. B. rubens neonates avoided the possibility of interference by rapidly attaching to Daphnia. The number of susceptible rotifers killed per Daphniaday−1 was 2-8 for D. cf. obtusa and 8-15 for D. cf. pulex; rotifer-based clearance rates per Daphniaday−1 were 10-35 and 35-65ml, respectively. When large daphniids occurred in Laguna Los Juncos in late September and October 1997, the only common plankton rotifer was the large and probably well-protected Keratella morenoi (total length=210μm). Still, microscopic examination of gut contents revealed three K. morenoi in a 3-mm D. cf. obtusa and one in a 3.5-mm D. dadayana. Springer Science+Business Media B.V., 2010 Rotifers nationallicence Daphnia nationallicence Interference nationallicence Meseta lakes nationallicence Patagonia nationallicence Diéguez María Laboratorio de Fotobiología, INIBIOMA (CONICET-UNC), Quintral 1250, 8400, San Carlos de Bariloche, Argentina aut Gilbert John Department of Biological Sciences, Dartmouth College, 03755, Hanover, NH, USA aut Hydrobiologia Springer Netherlands 662/1(2011-03-01), 189-195 0018-8158 662:1<189 2011 662 10750 https://doi.org/10.1007/s10750-010-0495-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10750-010-0495-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Diéguez María Laboratorio de Fotobiología, INIBIOMA (CONICET-UNC), Quintral 1250, 8400, San Carlos de Bariloche, Argentina aut NATIONALLICENCE 700 1- Gilbert John Department of Biological Sciences, Dartmouth College, 03755, Hanover, NH, USA aut NATIONALLICENCE 773 0- Hydrobiologia Springer Netherlands 662/1(2011-03-01), 189-195 0018-8158 662:1<189 2011 662 10750 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer