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Temperature does not influence functional response of amphipods consuming different trematode prey.

Authors
  • Born-Torrijos, Ana1
  • Paterson, Rachel A2, 3
  • van Beest, Gabrielle S1, 4
  • Schwelm, Jessica5
  • Vyhlídalová, Tereza6
  • Henriksen, Eirik H7
  • Knudsen, Rune7
  • Kristoffersen, Roar7
  • Amundsen, Per-Arne7
  • Soldánová, Miroslava8
  • 1 Institute of Parasitology, Biology Centre, Czech Academy of Sciences, 37005, České Budějovice, Czech Republic. , (Czechia)
  • 2 School of Biosciences, Cardiff University, Cardiff, CF10 3AX, UK.
  • 3 The Norwegian Institute for Nature Research, P. O. Box 5685 Torgarden, NO-7485, Trondheim, Norway. , (Norway)
  • 4 Cavanilles Institute for Biodiversity and Evolutionary Biology, Science Park, University of Valencia, P. O. Box 22085, 46071, Valencia, Spain. , (Spain)
  • 5 Aquatic Ecology and Centre for Water and Environmental Research, University of Duisburg-Essen, Universitätsstraße 5, D-45141, Essen, Germany. , (Germany)
  • 6 Faculty of Science, University of South Bohemia in České Budějovice, Branišovská 31, 37005, České Budějovice, Czech Republic. , (Czechia)
  • 7 Department of Arctic and Marine Biology, Faculty of Biosciences, Fisheries and Economics, UiT The Arctic University of Norway, N9037, Tromsø, Norway. , (Norway)
  • 8 Institute of Parasitology, Biology Centre, Czech Academy of Sciences, 37005, České Budějovice, Czech Republic. [email protected] , (Czechia)
Type
Published Article
Journal
Parasitology Research
Publisher
Springer-Verlag
Publication Date
Dec 01, 2020
Volume
119
Issue
12
Pages
4271–4276
Identifiers
DOI: 10.1007/s00436-020-06859-1
PMID: 32845358
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Direct consumption on free-living cercariae stages of trematodes by non-host organisms interferes with trematode transmission and leads to reduced infections in the next suitable hosts. Consumer functional responses provide a useful tool to examine relationships between consumption rates and ecologically relevant prey densities, whilst also accounting for abiotic factors that likely influence consumption rates. We investigated how temperature influences the consumer functional response of the amphipod Gammarus lacustris towards the cercariae of three freshwater trematodes (Diplostomum, Apatemon and Trichobilharzia). Amphipods displayed different functional responses towards the parasites, with Type II responses for Diplostomum and Type I responses for Apatemon prey. Temperature did not alter the consumption rate of the amphipod predator. Trichobilharzia was likely consumed at similar proportions as Diplostomum; however, this could not be fully evaluated due to low replication. Whilst Type II responses of invertebrate predators are common to various invertebrate prey types, this is the first time a non-filter feeding predator has been shown to exhibit Type I response towards cercarial prey. The prey-specific consumption patterns of amphipods were related to cercarial distribution in the water column rather than to the size of cercariae or temperature influence. The substantial energy flow into food webs by non-host consumer organisms highlights the importance of understanding the mechanisms that modulate functional responses and direct predation in the context of parasitic organisms.

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