Impacts of invasive crayfish (Pacifastacus leniusculus) on endangered freshwater pearl mussels (Margaritifera laevis and M. togakushiensis) in Japan

Machida, Yoshiyasu; Akiyama, Yoshihiro

doi:10.1007/s10750-013-1665-8

Cited by 22 publications

(33 citation statements)

References 15 publications

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“…This comes as no surprise since other crayfish species are known to prey freshwater bivalves (e.g. Klocker and Strayer, 2004;Perry et al, 1997) and Machida and Akiyama (2013) showed that P. leniusculus was capable of preying two endangered Margaritifera species.…”

Section: Discussionmentioning

confidence: 99%

“…of medium size and suggested that this size class was the most suitable for crayfish manipulation. Nonetheless, and based on Machida and Akiyama (2013) results, these crayfishes may also kill small immature mussels. Besides this, in our study, crayfish size did not affect predation, which shows that smaller crayfishes are as capable of preying bivalves of various sizes as their larger counterparts.…”

Section: Discussionmentioning

confidence: 99%

“…In addition, 156 of the native bivalves collected were found dead and presented characteristic marks of crayfish predation (see Fig. 1A and Machida and Akiyama, 2013). The percentage of shell predation of native bivalves varied between 1.0% and 45.0% for A. anatina (Fig.…”

Section: In Situ Validationmentioning

confidence: 94%

“…At the end of each experiment (see below), predation was assessed by checking for the presence of characteristic predation marks on bivalve shells (see Fig. 1A and Machida and Akiyama, 2013) and by visually estimating the percentage of missing shell due to predation comparing to the total shell area.…”

Section: Laboratory Experimentsmentioning

confidence: 99%

“…Nevertheless, very few studies assessed bivalve predation by invasive crayfishes (e.g. Klocker and Strayer, 2004;Machida and Akiyama, 2013) and so the possible consequences of these introductions remain speculative and almost ignored. Given this knowledge gap, the main aim of this study was to describe the potential impacts of P. clarkii and P. leniusculus on four freshwater bivalve species (the mussels Anodonta anatina, Potomida littoralis and Unio delphinus; and the clam Corbicula fluminea) by assessing: i) if predator-prey interactions occur between the invasive crayfishes and bivalves and at what intensity; ii) if some bivalve species are more prone to predation than others; iii) if predation levels depend on predator and prey size; and iv) if P. clarkii and P. leniusculus compete for the bivalves as a prey.…”

Section: Introductionmentioning

confidence: 99%

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Invasive crayfishes as a threat to freshwater bivalves: Interspecific differences and conservation implications

Meira

Lopes‐Lima

Varandas

et al. 2019

Science of The Total Environment

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Freshwater bivalves have suffered major global declines, being the introduction of invasive alien species (IAS) an important, but not well studied, mechanism of threat. This study assessed the predator-prey relationship between two non-native crayfish species (Procambarus clarkii and Pacifastacus leniusculus) and three native (Anodonta anatina, Potomida littoralis and Unio delphinus) and one non-native (Corbicula fluminea) freshwater bivalve species through experiments in laboratory and validation under natural conditions (Sabor River basin, Portugal). All native bivalve species were preyed both in laboratory and in the field; however, both crayfish species were unable to prey C. fluminea. Predation was dependent on crayfish and bivalve species but was not affected neither by crayfish nor bivalve sizes. In the laboratory, the most preyed species by both crayfishes was A. anatina. On average, this species was preyed at least 12% more than other species, when crayfishes had a choice. Similar results were found in the field. We also found signs of competition between both crayfishes, being P. clarkii more dominant and aggressive as this species, on average, manipulated the bivalves 63.6% more times and 24:33 min longer than P. leniusculus, and initiated 55.8% more agnostic bouts. Our results support the idea that P. clarkii and P. leniusculus can affect native freshwater bivalves, but clear interspecific differences were detected. Both crayfishes may have direct and indirect impacts on bivalve populations by increasing mortality or by reducing their fitness. In addition, since both crayfishes do not prey C. fluminea, they offer this IAS another advantage over native bivalves. Given the widespread distribution of both P. clarkii and P. leniusculus and the threatened status of many freshwater bivalves, the dynamics and impacts of this relationship should be taken in account in the implementation of management measures devoted to the conservation of native freshwater bivalves.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: In Situ Validationmentioning

confidence: 94%

Section: Laboratory Experimentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Invasive crayfishes as a threat to freshwater bivalves: Interspecific differences and conservation implications

Meira

Lopes‐Lima

Varandas

et al. 2019

Science of The Total Environment

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Predation preference of signal crayfish (Pacifastacus leniusculus) on native and invasive bivalve species

Sanders

Mills²

2022

River Research & Apps

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Predatory, non‐native fauna can influence biodiversity and trophic dynamics in invaded ecosystems. Signal crayfish (Pacifastacus leniusculus) are a highly successful invader, which have altered freshwater benthic communities, including bivalve populations. Bivalves are a keystone freshwater group in global in decline, partly due to invasion by alien bivalve and crayfish species. However, little is known about the predatory impacts of invasive crayfish within co‐occurring native and invasive bivalve populations. Mesocosm predation choice experiments considered relative signal crayfish predation rates between paired native (Anodonta anatina and Unio tumidus) and invasive (Dreissena polymorpha, D. bugensis, and Corbicula fluminea) bivalves, and between paired invasive bivalves. All bivalves were actively predated, but there was no consistent difference in the biomass of invasive versus native bivalves consumed. However, the effects of consumption were consistently different; 18.2% of invasive bivalves were lethally predated, with 100% of surviving individuals remaining undamaged, whereas 1.1% of native bivalves were lethally predated, but 100% of surviving individuals received nonlethal damage in the form of shell chipping, which could reduce long‐term bivalve fitness in natural environments. In experiments considering paired invasive species, D. polymorpha was more resistant to predation when compared to other invasive taxa tested. The majority of field research considering aquatic invasions considers purely lethal predation effects inferred from invertebrate presence/absence. These experiments demonstrate the need to better understand both the processes and impacts of predation by invasive species, which may include substantial nonlethal effects on the fitness and life history of endangered taxa.

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Invertebrate zoogeomorphology: A review and conceptual framework for rivers

Mason

Sanders

2021

WIREs Water

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Invertebrates are important sediment engineers, making up for their small body size with abundance and behavioral diversity. However, despite the recognized importance of invertebrates as sediment engineers in terrestrial and marine environments, zoogeomorphology in rivers has primarily considered larger taxa, such as fish and beaver. This article reviews the zoogeomorphic effects of invertebrates in freshwater habitats, with a focus on rivers. To better synthesize current zoogeomorphic research and to help guide future studies we build a conceptual model considering biotic (behavior, abundance, body size, life history, and species invasions) and abiotic (geophysical energy and sediment grain size) controls on the direction and magnitude of zoogeomorphology. We also incorporate invertebrate engineers into conceptual sediment entrainment models, to understand their geomorphic role in the context of hydraulic power and sediment size. We structure our review around invertebrate behavior as a key control on whether invertebrates have a sediment destabilizing or stabilizing impact. Invertebrate zoogeomorphic behavior are diverse; the majority of research concerns bioturbation, a result of locomotion, foraging, and burrowing behaviors by many taxa. Similarly, burrowing into bedrock by a caddisfly and non-biting midge larvae promotes bioerosion. Attachment to the substrate, (e.g., silk nets by caddisfly larvae or byssal threads by some mussels) can stabilize sediment, providing bioprotection. Bioconstructions (e.g., caddisfly cases and mussel shells) may have either stabilizing or destabilizing effects depending on their density and abiotic context. Interactions between lotic invertebrates and fluvial processes are complex and understudied, requiring further research across a greater range of taxa, behaviors, and spatiotemporal scales.

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Impacts of invasive crayfish (Pacifastacus leniusculus) on endangered freshwater pearl mussels (Margaritifera laevis and M. togakushiensis) in Japan

Cited by 22 publications

References 15 publications

Invasive crayfishes as a threat to freshwater bivalves: Interspecific differences and conservation implications

Invasive crayfishes as a threat to freshwater bivalves: Interspecific differences and conservation implications

Predation preference of signal crayfish (Pacifastacus leniusculus) on native and invasive bivalve species

Invertebrate zoogeomorphology: A review and conceptual framework for rivers

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