| host manipulation of a freshwater crustacean (gammarus roeseli) by an acanthocephalan parasite (polymorphus minutus) in a biological invasion context. | several gammarid species serve as intermediate hosts for the acanthocephalan parasite polymorphus minutus. this parasite influences gammarid behaviour in order to favour transmission to its ultimate host, generally a bird. we investigated this host manipulation in gammarus roeseli, a gammarid species introduced in france 150 years ago which now coexists with several exotic species from different origins. in the field, vertical distribution of g. roeseli revealed a higher proportion of infected i ... | 2006 | 16934814 |
| an acanthocephalan parasite boosts the escape performance of its intermediate host facing non-host predators. | among the potential effects of parasitism on host condition, the 'increased host abilities' hypothesis is a counterintuitive pattern which might be predicted in complex-life-cycle parasites. in the case of trophic transmission, a parasite increasing its intermediate host's performance facing non-host predators improves its probability of transmission to an adequate, definitive host. in the present study, we investigated the cost of infection with the acanthocephalan polymorphus minutus on the lo ... | 2008 | 18477417 |
| permanent genetic resources added to molecular ecology resources database 1 august 2009-30 september 2009. | this article documents the addition of 238 microsatellite marker loci and 72 pairs of single nucleotide polymorphism (snp) sequencing primers to the molecular ecology resources database. loci were developed for the following species: adelges tsugae, artemisia tridentata, astroides calycularis, azorella selago, botryllus schlosseri, botrylloides violaceus, cardiocrinum cordatum var. glehnii, campylopterus curvipennis, colocasia esculenta, cynomys ludovicianus, cynomys leucurus, cynomys gunnisoni, ... | 2010 | 21565018 |
| getting what is served? feeding ecology influencing parasite-host interactions in invasive round goby neogobius melanostomus. | freshwater ecosystems are increasingly impacted by alien invasive species which have the potential to alter various ecological interactions like predator-prey and host-parasite relationships. here, we simultaneously examined predator-prey interactions and parasitization patterns of the highly invasive round goby (neogobius melanostomus) in the rivers rhine and main in germany. a total of 350 n. melanostomus were sampled between june and october 2011. gut content analysis revealed a broad prey sp ... | 2014 | 25338158 |
| effects of sublethal copper exposure on two gammarid species: which is the best competitor? | biomarker responses in organisms exposed to copper were examined by comparing two gammarid species, gammarus roeseli and dikerogammarus villosus, based on gender. g. roeseli specimens were exposed to 20 μg/l of copper for 6, 12, 24 and 48-h periods, while d. villosus were exposed to 20 and 30 μg/l of copper for 12, 48 and 72 h. males and females of each species were exposed separately and biomarker measurements were performed for each species and gender. the selected biomarkers were antioxidant ... | 2011 | 21113796 |
| ecophysiological responses to temperature of the "killer shrimp" dikerogammarus villosus: is the invader really stronger than the native gammarus pulex? | with global climate changes, biological invasions are considered to be one of the main causes of the decline of freshwater biodiversity. in this context, predicted increases in global temperature may alter the geographical distributions of native and invasive species. the purpose of our study was to examine the metabolic, behavioral and physiological responses to short-term temperature acclimation of two widely distributed species (the most successful european invader, dikerogammarus villosus, a ... | 2011 | 21457784 |
| synergistic impacts by an invasive amphipod and an invasive fish explain native gammarid extinction. | worldwide freshwater ecosystems are increasingly affected by invasive alien species. in particular, ponto-caspian gobiid fishes and amphipods are suspected to have pronounced effects on aquatic food webs. however, there is a lack of systematic studies mechanistically testing the potential synergistic effects of invasive species on native fauna. in this study we investigated the interrelations between the invasive amphipod dikerogammarus villosus and the invasive fish species neogobius melanostom ... | 2016 | 27417858 |
| antagonistic effects of biological invasion and environmental warming on detritus processing in freshwater ecosystems. | global biodiversity is threatened by multiple anthropogenic stressors but little is known about the combined effects of environmental warming and invasive species on ecosystem functioning. we quantified thermal preferences and then compared leaf-litter processing rates at eight different temperatures (5.0-22.5 °c) by the invasive freshwater crustacean dikerogammarus villosus and the great britain native gammarus pulex at a range of body sizes. d. villosus preferred warmer temperatures but there ... | 2017 | 28013390 |
| metabolic activity and behavior of the invasive amphipod dikerogammarus villosus and two common central european gammarid species (gammarus fossarum, gammarus roeselii): low metabolic rates may favor the invader. | the ponto-caspian amphipod dikerogammarus villosus is one of the most successful invaders in central european rivers. contrary to studies on its ecology, ecophysiological studies comparing the species' physiological traits are scarce. in this context, in particular the metabolic activity of the invasive species has rarely been considered and, moreover, the few existing studies on this species report strongly deviating results. the purpose of this study was to assess the metabolic activity and be ... | 2016 | 26478193 |
| invading predatory crustacean dikerogammarus villosus eliminates both native and exotic species. | as the tempo of biological invasions increases, explanations and predictions of their impacts become more crucial. particularly with regard to biodiversity, we require elucidation of interspecific behavioural interactions among invaders and natives. in freshwaters in the netherlands, we show that the invasive ponto-caspian crustacean amphipod dikerogammarus villosus is rapidly eliminating gammarus duebeni, a native european amphipod, and gammarus tigrinus, until now a spectacularly successful in ... | 2000 | 10874746 |
| a comparison of the short-term toxicity of cadmium to indigenous and alien gammarid species. | amphipods play an important role in many aquatic ecosystems and are commonly used in ecotoxicology and ecosystem health assessment. several alien gammarids have been introduced in many regions of the world during the last decades. in this study, we investigated if differences in cadmium sensitivity occurred between (1) different species belonging to the family gammaridae and (2) different populations of the same species originating from a polluted or a non-polluted site. the acute cadmium toxici ... | 2012 | 22354564 |
| a spatial modeling approach to predicting the secondary spread of invasive species due to ballast water discharge. | ballast water in ships is an important contributor to the secondary spread of invasive species in the laurentian great lakes. here, we use a model previously created to determine the role ballast water management has played in the secondary spread of viral hemorrhagic septicemia virus (vhsv) to identify the future spread of one current and two potential invasive species in the great lakes, the eurasian ruffe (gymnocephalus cernuus), killer shrimp (dikerogammarus villosus), and golden mussel (lim ... | 2014 | 25470822 |
| invaders, natives and their enemies: distribution patterns of amphipods and their microsporidian parasites in the ruhr metropolis, germany. | the amphipod and microsporidian diversity in freshwaters of a heterogeneous urban region in germany was assessed. indigenous and non-indigenous host species provide an ideal framework to test general hypotheses on potentially new host-parasite interactions, parasite spillback and spillover in recently invaded urban freshwater communities. | 2015 | 26263904 |
| invasive ponto-caspian amphipods and fish increase the distribution range of the acanthocephalan pomphorhynchus tereticollis in the river rhine. | non-indigenous species that become invasive are one of the main drivers of biodiversity loss worldwide. in various freshwater systems in europe, populations of native amphipods and fish are progressively displaced by highly adaptive non-indigenous species that can perform explosive range extensions. a total of 40 ponto-caspian round gobies neogobius melanostomus from the rhine river near düsseldorf, north rhine-westphalia, germany, were examined for metazoan parasites and feeding ecology. three ... | 2012 | 23300895 |
| biomonitoring of tin and arsenic in different compartments of a limnic ecosystem with emphasis on corbicula fluminea and dikerogammarus villosus. | asian clam corbicula fluminea, the amphipod dikerogammarus villosus and the macrophyte nuphar lutea were tested for investigating spatial and temporal variability in the bioavailability of tin and arsenic in the river lippe, germany. samples were collected from september 2002 to may 2003 at a tin polluted site (source pollution) and a reference site. additional screening sampling was carried out twice in april 2003 to test the extent of as and sn concentration in periphyton (aufwuchs) samples. a ... | 2005 | 15735779 |
| eel parasite diversity and intermediate host abundance in the river rhine, germany. | european eels (anguilla anguilla) from 2 sampling sites on the rhine river (near karlsruhe and near worms) were investigated with respect to their parasite communities. nine different metazoan species were found to live in and on the eels. the highest number of species was recorded from the intestine, which contained up to 6 different helminths. among these, acanthocephalans were the most prevalent worms with the eel-specific parasite paratenuisentis ambiguus as the dominant species of the intes ... | 2001 | 11510684 |