caa a22 4500 605509263 CHVBK 20210128100640.0 cr unu---uuuuu 210128e20150901xx s 000 0 eng 10.1007/s10452-015-9522-7 doi (NATIONALLICENCE)springer-10.1007/s10452-015-9522-7 Competition for shelter occupancy between a native freshwater crab and an invasive crayfish [Elektronische Daten] [Pantelis Savvides, Vasilis Louca, Spyros Sfenthourakis] Potamon potamios populations have decreased significantly due to the degradation of its habitat caused by human activities, mainly the use of insecticides. Today, P. potamios is protected by Cypriot law, but not much information is known regarding possible effects on the species from interactions with the introduced and invasive freshwater crayfish Procambarus clarkii. We tested the hypothesis that the invasive crayfish P. clarkii can cause negative effects on the populations of the only indigenous freshwater crab of Cyprus P. potamios, through agonistic competition for shelter. A laboratory experiment on the competition between P. potamios and P. clarkii for securing shelter has been performed. During the experiment, pairs of equal-sized individuals from each species were evaluated for aggressiveness, domination in fights and shelter occupation. Results showed that even though both species are similarly aggressive, the crayfish wins more fights and occupies shelter more efficiently than the crab. Even though at present there is no evidence that the two species are syntopic, these results are indicative of possible negative effects of the alien invasive crayfish on the indigenous crab where they may become syntopic in the future. Springer Science+Business Media Dordrecht, 2015 Freshwater decapods nationallicence Behaviour nationallicence Competition nationallicence Alien species nationallicence Savvides Pantelis Department of Biological Sciences, University of Cyprus, Panepistimiou Str. 1, Aglantzia, 2109, Nicosia, Cyprus aut Louca Vasilis School of Biological Sciences, University of Aberdeen, Cruickshank Building, AB24 3UU, Aberdeen, UK aut Sfenthourakis Spyros Department of Biological Sciences, University of Cyprus, Panepistimiou Str. 1, Aglantzia, 2109, Nicosia, Cyprus aut Aquatic Ecology Springer Netherlands 49/3(2015-09-01), 273-278 1386-2588 49:3<273 2015 49 10452 https://doi.org/10.1007/s10452-015-9522-7 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10452-015-9522-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Savvides Pantelis Department of Biological Sciences, University of Cyprus, Panepistimiou Str. 1, Aglantzia, 2109, Nicosia, Cyprus aut NATIONALLICENCE 700 1- Louca Vasilis School of Biological Sciences, University of Aberdeen, Cruickshank Building, AB24 3UU, Aberdeen, UK aut NATIONALLICENCE 700 1- Sfenthourakis Spyros Department of Biological Sciences, University of Cyprus, Panepistimiou Str. 1, Aglantzia, 2109, Nicosia, Cyprus aut NATIONALLICENCE 773 0- Aquatic Ecology Springer Netherlands 49/3(2015-09-01), 273-278 1386-2588 49:3<273 2015 49 10452