caa a22 4500 445892056 CHVBK 20180317145619.0 cr unu---uuuuu 170323e20110801xx s 000 0 eng 10.1007/s10750-011-0702-8 doi (NATIONALLICENCE)springer-10.1007/s10750-011-0702-8 The influence of predator regime on the behaviour and mortality of a freshwater amphipod, Gammarus pulex [Elektronische Daten] [Johan Ahlgren, Kajsa Åbjörnsson, Christer Brönmark] In species with restricted dispersal, traits may become genetically fixed leading to local adaptations. Therefore, predator avoidance in a prey species may differ between populations experiencing different predator regimes, but also between sexes within a population due to different vulnerability to predators. In this study we used male and female Gammarus pulex from two different predator regimes: fishless ponds, where invertebrates are the dominant predators and ponds with predatory fish. In the laboratory we examined refuge use, mortality, leaf decomposition rate and pair-formation in G. pulex when exposed to predator cues from either invertebrate predators or fish. Individuals from fish ponds spent more time in refuge and had a higher mortality than those from fishless ponds independent of predator cues. There was no effect of pond predator regime or predator cues on leaf decomposition rates. Further, fewer individuals formed pairs in G. pulex from fish ponds than from fishless ponds. Male G. pulex had a higher mortality and a higher decomposition rate than females independent of predator cues. However, there was no difference in refuge use between sexes. Our study shows that there are general differences in behaviour traits, both between predator regimes and sexes in G. pulex. Springer Science+Business Media B.V., 2011 Local adaptations nationallicence Refuge use nationallicence Mortality nationallicence Predator regime nationallicence Pair-formation nationallicence Gammarus pulex nationallicence Ahlgren Johan Department of Aquatic Ecology, Lund University, Ecology Building, 223 62, Lund, Sweden aut Åbjörnsson Kajsa Department of Aquatic Ecology, Lund University, Ecology Building, 223 62, Lund, Sweden aut Brönmark Christer Department of Aquatic Ecology, Lund University, Ecology Building, 223 62, Lund, Sweden aut Hydrobiologia Springer Netherlands 671/1(2011-08-01), 39-49 0018-8158 671:1<39 2011 671 10750 https://doi.org/10.1007/s10750-011-0702-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10750-011-0702-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ahlgren Johan Department of Aquatic Ecology, Lund University, Ecology Building, 223 62, Lund, Sweden aut NATIONALLICENCE 700 1- Åbjörnsson Kajsa Department of Aquatic Ecology, Lund University, Ecology Building, 223 62, Lund, Sweden aut NATIONALLICENCE 700 1- Brönmark Christer Department of Aquatic Ecology, Lund University, Ecology Building, 223 62, Lund, Sweden aut NATIONALLICENCE 773 0- Hydrobiologia Springer Netherlands 671/1(2011-08-01), 39-49 0018-8158 671:1<39 2011 671 10750 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer