2019
DOI: 10.1101/626432
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Experimental evidence of invasion facilitation in the zebra mussel-killer shrimp system

Abstract: Invasion facilitation, whereby one species has a positive effect on the establishment of another species, could help explain the rapid colonisation shown by some freshwater invasive species, but the underlying mechanisms remain unclear. We employed two-choice test arenas to test whether the presence of zebra mussel (Dreissena polymorpha) could facilitate the establishment of the killer shrimp (Dikerogammarus villosus). Killer shrimp preferred to settle on mats of zebra mussel, but this was unrelated to mat siz… Show more

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Cited by 2 publications
(1 citation statement)
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“…Our study shows that within 6 years (approximately 20 generations) of their introduction into a novel area in Britain killer shrimp display a strong tendency to hide when they are exposed to the chemical scent of a native predatory fish (the three spined stickleback), but not when they are exposed to dechlorinated water. Given that no evidence of predator avoidance was detected on the same population in relation to the scent of non-predatory Nile tilapia (Rolla et al 2019), this strongly suggests that chemical recognition of stickleback kairomones constitutes an evolved, adaptive trait.…”
Section: Discussionmentioning
confidence: 93%
“…Our study shows that within 6 years (approximately 20 generations) of their introduction into a novel area in Britain killer shrimp display a strong tendency to hide when they are exposed to the chemical scent of a native predatory fish (the three spined stickleback), but not when they are exposed to dechlorinated water. Given that no evidence of predator avoidance was detected on the same population in relation to the scent of non-predatory Nile tilapia (Rolla et al 2019), this strongly suggests that chemical recognition of stickleback kairomones constitutes an evolved, adaptive trait.…”
Section: Discussionmentioning
confidence: 93%