The very hungry amphipod: the invasive Dikerogammarus villosus shows high consumption rates for two food sources and independent of predator cues

Richter, Luise; Schwenkmezger, Lisa; Becker, J. Susanne; Winkelmann, Carola; Hellmann, Claudia; Worischka, Susanne

doi:10.1007/s10530-017-1629-4

Cited by 12 publications

(9 citation statements)

References 92 publications

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“…Resistance of D. villosus to predator non-consumptive effects was also confirmed by Richter et al (2017), who did not observe any disturbance of gammarid feeding behavior under the pressure of a benthivorous fish, the European bullhead (Cottus gobio). In contrast, the reduction in consumption in the presence of Cottus gobio kairomones was noted for another gammarid species -Gammarus pulex (Abjörnsson et al, 2000).…”

Section: Costs Of the Anti-predator Responses Of Dikerogammarus Villosusmentioning

confidence: 61%

“…Firstly, it is an omnivore with the tendency to food of animal origin, efficiently preying on many invertebrate species (Krisp & Maier, 2005), including the intra-guild predation on local amphipod species (Dick & Platvoet, 2000;MacNeil & Platvoet, 2005;Kinzler et al, 2009). In general, D. villosus strongly prefers animal food over plants (Bacela-Spychalska & van der Velde, 2013) and grows better on it (Gergs & Rothhaupt, 2008a), but the recent studies have revealed that under certain conditions it can act as a typical herbivore, consuming mainly plant food (Hellmann et al, 2015;Koester, Bayer & Gergs, 2016;Richter et al, 2017). This points to its high plasticity and ability to use various available food resources (Mayer, Maas & Waloszek, 2012), depending on local circumstances.…”

Section: Introductionmentioning

confidence: 99%

“…For instance, being a less efficient shredder than other amphipods, displaced by its appearance, D. villosus may negatively affect food webs by reducing the numbers of organisms relying on shredded organic material (MacNeil et al, 2011). On the other hand, D. villosus does not respond to predation risk by reduction in feeding , therefore it can be still capable of shredding organic material when other amphipods suffer non-consumptive costs of predator pressure (Abjörnsson et al, 2000;Richter et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

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The Braveheart amphipod: A review of responses of invasive Dikerogammarus villosus to predation signals

Jermacz

Kobak

2018

Preprint

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Predator pressure is a fundamental force driving changes at all levels of the community structure. It may protect native ecosystems from alien species. Therefore, resistance to diverse predators resulting from a universal anti-predator strategy seems crucial for invasion success. We present a comprehensive review of the responses of an invasive amphipod Dikerogammarus villosus to sympatric and allopatric predator signals. We summarize diverse aspects of the gammarid anti-predator strategy, including predator identification, morphological and behavioral adaptations, effectiveness of shelter use and resistance to indirect predator effects. The response of D. villosus is independent of predator species (including totally allopatric taxa), which assures the high flexibility of its predator recognition system. It has harder exoskeleton and better capability of utilizing shelters compared to other gammarids, resulting in relatively high resistance to predators. Therefore, it can use predator kairomones as indirect food signals (sharing the diet with the predator) and follow the predator scent. This resistance may allow D. villosus to reduce the costs of its physiological responses to predators and sustain growth in their presence. This might facilitate the invasion success by increasing its competitive advantage.

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Section: Costs Of the Anti-predator Responses Of Dikerogammarus Villosusmentioning

confidence: 61%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Braveheart amphipod: A review of responses of invasive Dikerogammarus villosus to predation signals

Jermacz

Kobak

2018

Preprint

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“…Resistance of D. villosus to predator non-consumptive effects was also confirmed by Richter et al (2018) , who did not observe any disturbance of gammarid feeding behaviour under the pressure of a benthivorous fish, the European bullhead ( Cottus gobio ). In contrast, another gammarid species ( G. pulex ) reduced its consumption in the presence of C. gobio kairomones ( Abjörnsson et al, 2000 ).…”

Section: Introductionmentioning

confidence: 61%

“…For instance, being a less efficient shredder than other amphipods, displaced by its appearance, D. villosus may negatively affect food webs by reducing the numbers of organisms relying on shredded organic material ( MacNeil et al, 2011 ). On the other hand, D. villosus does not respond to predation risk by reduction in feeding ( Jermacz & Kobak, 2017 ); therefore, it can still be capable of shredding organic material when other amphipods suffer non-consumptive costs of predator pressure ( Abjörnsson et al, 2000 ; Jermacz & Kobak, 2017 ; Richter et al, 2018 ).…”

Section: Introductionmentioning

confidence: 99%

The Braveheart amphipod: a review of responses of invasiveDikerogammarus villosusto predation signals

Jermacz

Kobak

2018

PeerJ

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Predator pressure is a fundamental force driving changes at all levels of the community structure. It may protect native ecosystems from alien species. Therefore, resistance to diverse predators resulting from a universal anti-predator strategy seems crucial for invasion success. We present a comprehensive review of the responses of an invasive amphipod Dikerogammarus villosus to sympatric and allopatric predator signals. We summarize diverse aspects of the gammarid anti-predator strategy, including predator identification, morphological and behavioural adaptations, effectiveness of shelter use and resistance to indirect predator effects. The response of D. villosus is independent of predator species (including totally allopatric taxa), which assures the high flexibility of its predator recognition system. It has a harder exoskeleton and better capability of utilizing shelters compared to other gammarids, resulting in relatively high resistance to predators. Therefore, it can use predator kairomones as indirect food signals (sharing the diet with the predator) and follow the predator scent. This resistance may allow D. villosus to reduce the costs of its physiological responses to predators and sustain growth in their presence. This might facilitate invasion success by increasing its competitive advantage.

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They do not fear the unknown: Ancylus fluviatilis (Mollusca, Planorbidae) shows no predator avoidance behavior towards a novel invasive predator

et al. 2022

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Biological invasion is a strong threat to native biodiversity, with limnic systems being especially vulnerable due to historical separation and resulting prey naivety. The prey naivety hypothesis states that native species may not be able to recognize novel predators due to a lack of common evolutionary background and, therefore, become easy targets. In a laboratory experiment, we added cues of native European bullhead (Cottus gobio Linnaeus, 1758) and invasive round goby [Neogobius melanostomus (Pallas, 1814)] to Ancylus fluviatilis Müller, 1774 originating from two different populations within the same river (one naive, one experienced towards round goby) and compared their predator avoidance behavior. Individuals from both populations recognized cues from the known predator C. gobio and reduced their locomotive activity. To round goby cues, however, naive individuals did not respond, thereby supporting the prey naivety hypothesis. Experienced individuals, in contrast, reduced their activity, suggesting a learning effect due to the co-occurrence of invasive predator and prey. At fast moving invasion fronts of highly invasive species like N. melanostomus, prey naivety can, hence, enhance their negative impact on ecosystems. Behavioral adaptation of native species resulting in predator avoidance reactions could, therefore, play an important role in ecosystem resilience and temporal invasion dynamics.

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The very hungry amphipod: the invasive Dikerogammarus villosus shows high consumption rates for two food sources and independent of predator cues

Cited by 12 publications

References 92 publications

The Braveheart amphipod: A review of responses of invasive Dikerogammarus villosus to predation signals

The Braveheart amphipod: A review of responses of invasive Dikerogammarus villosus to predation signals

The Braveheart amphipod: a review of responses of invasiveDikerogammarus villosusto predation signals

They do not fear the unknown: Ancylus fluviatilis (Mollusca, Planorbidae) shows no predator avoidance behavior towards a novel invasive predator

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